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PC Packet 06-12-2012 Table of Contents Agenda. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 �. Draft minutes of 5-08-2012 draft minutes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2�Draft Minutes of 5-22-2012 draft minutes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3� Hillside Exception, Variance and Tree Removal for a new single family residence Staff Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1 . Draft Resolutions . . . . . . . . . . . . . . . . . . . . . . . . 29 2. Arborist Report by Shady Tree Co. . . . . . . . . . . . . . . 40 3. Arborist Report by City Arborist Michael Bench . . . . . . . . 44 4. Geotechnical Investigation by EIC dated 10/15/11. . . . . . . 50 5. Geotechnical Peer Review by Cotton Shires & Assoc. dated 11/25/11. . . . . . . . . . . . . . . . . . . . . . . 97 6. Reply to Geotechnical Peer Review by EIC dated 3/16/12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 7. Supplemental Geotechnical Peer Review by Cotton Shires & Assocs dated 4/25/12 . . . . . . . . . . . . . . . . . . 134 8. Color & Material Board. . . . . . . . . . . . . . . . . . . . . 137 9. Environmental Documents. . . . . . . . . . . . . . . . . . . 138 10. Plan Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 4� Director's Report Staff Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 1 AGENDA C U P E RT I N O CITY OF CUPERTINO PLANNING COMMISSION MEETING 10350 Torre Avenue, Cupertino Community Hall Tuesday,June 12, 2012 ORDER OF BUSINESS SALUTE TO THE FLAG: 6:45 p.m. ROLL CALL APPROVAL OF MINUTES 1. Subiect: Draft minutes of 5-08-2012 Recommended Action: accept or modify minutes of 5-08-2012 Pa�e: 4 2. Subiect: Draft Minutes of 5-22-2012 Recommended Action: accept or modify minutes of 5-22-2012 Pa�e: 18 WRITTEN COMMUNICATIONS POSTPONEMENTS/1ZEMOVAL FROM CALENDAR ORAL COMMUNICATIONS This portion of the meeting is reserved for persons wishing to address the Commission on any matter not on the agenda. Speakers are limited to three (3) minutes. In most cases, State law will prohibit the Commission from making any decisions with respect to a matter not on the agenda. CONSENT CALENDAR PUBLIC HEARING 3. Subiect: Hillside Exception,Variance and Tree Removal for a new single family residence Recommended Action: Approve EXC-2011-11 and TR-2012-19 per the draft resolutions Approve a Mitigated Negative Declaration (EA-2011-17)for the project Deny V-2011-03 per the draft resolution Description: Application: EXC-2011-01,V-2011-03,TR-2012-19(EA-2011-17) Applicant: Barre Barnes (Holiday Drive, LLC) Location: 21740 Rainbow Drive APN#366-03-063 2 Tuesday,June 12, 2012 Hillside Exception to allow a 4,478 square foot single family residence plus a 840 square foot basement to be constructed on slopes of 30% or greater; Variance to allow an attached first story deck more than 18 inches above grade to be setback 0 feet from the property line where 10 feet is required; Tree Removal Permit to allow the removal and replacement of a 20" diameter, two- trunked, Coast Live Oak and a 28" diameter,three-trunked, Coast Live Oak Mitigated Negative Declaration Postponed from the 05-22-2012 meeting Planning Commission decision final unless appealed Pa�e: 24 OLD BUSINESS NEW BUSINESS REPORT OF THE PLANNING COMMISSION Environmental Review Committee Housing Commission Mayor's Monthly Meeting with Commissioners Economic Development Committee Meeting REPORT OF THE DIRECTOR OF COMMUNITY DEVELOPMENT 4. Subiect: Director's Report Recommended Action: accept report Pa�e: 168 ADJOURNMENT If yozz challer�ge the actior� of the PJanr�ir�g Conanaiss�ior� ir� cozz��t,yozz naay be Jinaited to��ais�ir�g or�Jy thos�e is�s�zzes�yozz o��s�onaeor�e els�e��ais�ed at the pzzblic hea��ir�g des�c��ibed ir� this�ager�da, o�� ir������itter� co����espor�der�ce delive��ed to the City of Czzpe��tir�o at, o��p��io�� tq the pzzblic hea��ir�g. Pleas�e r�ote that Planr�ir�g Conanais�s�ior�policy is�to allo��� ar�applicar�t ar�d g��ozzps�to speak fo�� 10 nair�zztes�ar�d ir�dividzzals� to speak fo�� 3 nair�zztes�. In compliance with the Americans with Disabilities Act (ADA),the City of Cupertino will make reasonable efforts to accommodate persons with qualified disabilities. If you require special assistance,please contact the city clerk's office at 408-777-3223 at least 48 hours in advance of the meeting. Materials related to an item on this agenda submitted to the Planning Department after distribution of the agenda packet are available for public inspection in the Planning Department located at 10300 Torre Avenue, during normal business hours. For questions on any items in the agenda, or for documents related to any of the items on the agenda, contact the Planning Department at (408) 777-3308 or plaiuling@cupertino.org. 3 CTTY OF CUPERTINO 10300 Torre Avenue Cupertino, CA 95014 CITY OF CUPERTINO PLANNING COMMISSION DRAFT MINUTES 6:45 P.M. May 8, 2012 TUESDAY CUPERTINO COMMUNITY HALL The regular Planning Commission meeting of MaS- 8, 2012 ��as called to order at 6:45 p.m. in the Cupertino Communit�-Hall, 10350 Toi7e Avenue, Cupertino, CA., by Chair Mart�-Miller. SALUTE TO THE FLAG ROLL CALL Commissioners present: Chairperson: Mart�-Miller Commissioner: Winnie Lee Commissioner: Clinton Bro��nlev Commissioner: Paul Brophy- Commissioners absent: Vice Chairperson: Don Sun Staff present: Communit�-Development Director: Aarti Sluivastava Cit�-Planner: Ga��-Chao Assistant Planner: Simon Vuong Cit�-Attome�-: Ca�ole Koracle APPROVAL OF MINUTES: Minutes of the April 2�1, 2012 Plunning Commission Meeting: Com. Lee recommended the follo��ing changes: Page 3, N1r. Wisenhunt teit: after "und thut is the biggest"add��ord "contribution" MOTION: Motion by Com. Brophy, second by Com. Lee, and unanimously carried 4-0-0; Com. Sun absent; to approve the Apri124,2012 minutes as amended. WRITTEN COMMUNICATIONS: None other than those related to the project. ORAL COMMUNICATIONS: None POSTPONEMENTS/REMOVAL FROM CALENDAR: None CONSENT CALENDAR: None PUBLIC HEARING Chair Miller: • Eiplained that both Items 2 and 3 «ould be discussed together as the�- are pa�t of the same project��ith the same developer. Spealcer time ��i11 be limited to 3 minutes each for either/or 4 Cupertino Planning Commission 2 May 8, 2012 both projects. He noted that a number of emails have been received b�-the cit�-«ith regard to the school district and the citv attornev«�ill comment. City Attorney: • The project and the jurisdiction of the cit�- and the Planning Commission in particular relates to the land use aspects of this application, things such as traffic, siting of the buildings, design of the buildings, etc. • She cla�ified that the cit�-does not have jurisdiction over an�-of the issues that pertain to either Cupertino Union or Fremont Union High School Districts. The cit�-is not in a position to deal ��ith some of the issues that have been raised and some of the communications such as pa�cel tai. Spealcers ma�- comments on those issues, but the Planning Commission cannot act on an�,�thing that relates to matters be�-ond its jurisdiction or the jurisdiction of the cit�- and those issues��ould have to be brought up��ith the school district as opposed to the cit�-. 2. DP-2011-06,ASA-2011-20, Miied Use Development of 89 apa�-tment units and (EA-2011-16) TR-2012-18 7,000 sq,ft. of commercial space; development permit Mike Ducote (Promethius to allo�� the demolition of an approi. 20,000 sq.ft. Real Estate) eiisting commercial building and construction of a 20030,20060 Stevens Creek miied-use project consisting of 89 apa�tment units and a B1vd., 10041 Blaney Ave. 7,000 sq.ft. commercial building. Architectural and Site Approval for a ne�� miied-use development consisting of 89 apa�tment units and a 7,000 sq. ft. commercial building, Tree Removal Permit to allo�� the removal and replacement of approi. 57 trees to facilitate the construction of a ne�� apa�-tment complei; Mitigation Negative Decla�ation. Tentative C'ity C'oz�ncil heaNing date:Jz�ne �, 2012 3. DP-2011-05,ASA-2011-19, Development Permit to allo�� the construction of 12 ne�� (EA-2011-15) TR-2012-13 residential units at an eiisting apartment complei; Mike Ducote (Promethius Architectural and Site approval for 12 ne�� residential Real Estate) units��ithin an eiisting apa�-tment complei; Tree 10159 So.Blaney Ave. Removal Permit to allo�� the removal and replacement (Lake Biltmore) of approi. 5 trees to facilitate the construction of t��o ne�� apartment buildings. Mitigated Negative Decla�ation. Tentative City Coz�ncil heaNing date:Jz�ne �, 2012 Simon Vuong,Assistant Planner,presented the staff report: • Revie��ed the application from Promethius Real Estate Group to approve development permits to allo�� the demolition of approiimatel�- 21,000 sq. ft. of commercial space and to construct 101 apartment units and a 7,000 sq. ft. commercial building. In addition a�chitectural site approvals for site and building improvements and associated tree removals a�e also submitted for approval. • He revie«ed the project site and bacicground information for both the Stevens Creelc site and the Biltmore Apartment site. In apply-ing the cit5-'s Hea�t of the Cit�-densit�-requirements, the project«ould need to be reduced b�-t«o units on the Stevens Creelc site in order to sta�-«ithin the maiimum densit�- allo��ed, ��hich is 87 units; therefore staff recommends approval of 87 apa�tment units insteacl of the proposed 89. On the Biltmore site, 12 apa�tment units a�e proposed to be added to the 179 unit apartment complei; the maiimum densit�- allo«ed on Biltmore apa�-tments is 202 units, not 220 as noted in the staff report. The project ��ill not dra�� from the Hea�-t of the Cit�- commercial balance of 105,876 sq. ft., instead a net of 14,000 ��i11 be returned to the balance for ne�� net commercial balance of 119,000 sq. ft. Ho��ever, the project��il1 dra�� from Hea�-t of the Cit�-residential balance of 308 residential units. 5 Cupertino Planning Commission 3 May 8, 2012 • He revie«ed the site plan, architecture overvie«, commercial building and retail viabilit�; circulation; landscape plan;parlcing, communit�-outreach; and building elevations. • The project has also been revie«ed b�-the Public Works and Building and Fire Depa�tments. A neighborhood meeting ��as held in Ma�ch 2012, the cit�- notice of Public Hearing ��as mailed out on April 18, 2012, to those ��ho attended the meeting and also those ��ithin 500 foot raclius of the site. The cit�- «ebsite «as also created and several communit�- members have eipressed theu concerns about the potential impacts of the project. It��as estimated that 40 students«ould be generated b�-the project. • Staff recommends that the Planning Commission recommend to the Cit�- Council approval of the development permit, a�chitectural site approval, tree removal permit and mitigated negative decla�ation in accordance«ith the draft resolutions. Staff ans��ered Commissioners' questions about the project. John Moss,Prometheus Real Estate Group: • Said the�-��ere proposing housing at this pa�-ticula� location because the cit�- recentl�-made a concerted effort to go ahead and identifi-it as a housing site for the State of Califomia. Plans are consistent ��ith the cit�-'s vision as it relates to creating housing opportunities at this particula� location. The cit�-'s housing element ��as put together in 2010 and on1�- 12 sites remain; 3 of��hich a�e presented to the Commission for revie��. • He said the choice to build apartments as opposed to to«nhomes or condos does not eliminate the impact on schools, but the mii of 55%of the units as one bedroom apartments, and 45%of the units as 2 bedroom apartments mitigates the impact. To«nhomes or condos «ould typically-have 3 and 4 bedroom units; insteacl of 1 and 2 bedroom units,therefore the impact to both schools and traffic ��ould tend to be much more significant than ��ith the apa�tment development proposed. • Other benefits of project include pa�lcs and jobs. If the project is approved, applicant is obligated to pay approiimatel�- $800K in the ��a�- of pa�ks fees and the cit�- could reinvest those monies or invest those monies into eiisting pa�lcs or attempt to create ne�� pa�lc space. Cupertino and its neighboring cities have created a signif�icant number of jobs recentl�; including the Apple campus��ith 3.1 million sq. ft. of office space that��ill clearl�-create more jobs in this area. The development��i11 provide a vei�- small fraction of the housing demand as a result of all of the ne�� commercial space that is going to be proposed in the cit�-shortl�-. • Relative to retail, he said choosing a size for the proposed retail��as most important to ensure first and foremost that the�- ��ould propose a building that ��ould maiimize their chances of attracting the finest retailers possible, ��hich ��ould include a number of things in terms of qualit5-, location, access, and visibilit�-. The�- met ��ith retail brolcers in the industi�- to get feedbacic on ��hat retailers are loolcing for and the results of that discussion simplified their thinlcing in terms of size of the retail. • The�-maiimized the length of the retail along Stevens Creelc��ith the t��o access points that ��ere eluded to ea�lier��ith pa�lcing on either side of them; as a result maiimized that length and ��ere about 190 feet on the length of the retail; and retail eiperts suggested that 40 foot ba�-depths��ere appropriate to attract the best retailers. • The retail building��as designed purposely to be 1-1/2 stories in height to create a prominent and iconic aesthetic at this pa�-ticula�location that��il1 catch the e�-es of prospective customers but��i11 still retain the classic form of a�chitecture. • He commented on the cui7ent retail tenants; Chilis business is not viable and ��ill close��ithin 12 months rega�dless of ��hether the redevelopment proposal proceeds or not. The other restaurant has been occup5-ing only-one half of the building; the other half remains vacant. The building has hacl a number of different tenants over the last 15 �-ears; all of��hich have gone out of business��hile the�-��ere there. The retail building in the bacic of the propert5-is old and 6 Cupertino Planning Commission 4 May 8, 2012 • dated. The present retailers in their buildings a�e invited bacic«hen the project is complete and some have eipressed interest in doing so, and other prospects are being sought out. • The plans are appropriate both on the retail side and residential side as the�-are consistent��ith the cit�-'s General Plan, the Hea�-t of the Cit�-Plan and all the zoning ordinances, including but not limited to height, densities, setbacics, landscape and traffic and an�- and all design guidelines. The Hea�-t of the Cit�- Plan «as just updated by the Council and Commission in 2010 and the�-are consistent��ith the Plan. He noted the�-��ere not requesting any-variances in theu project proposal. • In terms of the t��o units, he eiplained that the calculation in their plans for the number of units on the ne�� propert5- allo��s for t��o fe��er units than ��hat ��as proposed. The�- ha�e provided pa�lcing for those t«o units and ha�e not�-et gone ahead and redesigned the project to incorporate those t��o units else��here; but the5- plan to ��orlc��ith their architect to come up «ith a reasonable proposal on ho« those t«o units could be added bacic to the Biltmore propert5-��here the densities a�e undershot b�-more than 10 units. Com. Brownley: • Asked staff if the Commission could go foil�ard ��ith the recommendation for 87 apa�-tments and consider the reallocation of t��o units at another time. Aarti Shrivastava: • Said that the applicant��as informed that all the Planning Commission is talcing action on or malcing a recommendation on is the 87 and the 12; an�- other changes ��il1 have to come through sepa�ately-��ith a separate hea�ing. • Said that a transfer of development rights could not be done because it is t«o separate pa�cels and the zoning is different on each parceL The�- are proposing it on the Biltmore apa�tment sites,not on the ne�� miied-use site; changes are not part of tonight's discussion. Com. Lee: • Asked if an�-consideration«as given to a t«o stoi�-retail building. John Moss: • Said the�-looked at providing an additional stoi�-on top of the retail; loolcing at different uses for residential, retail and office; and in talking ��ith the brolcerage communit�- and also eiperience��ith other projects, it��as determined that it��as ra�e to ha�e retail above another floor of retaiL The on1�- times it has been successful is in a much la�ger retail environment ��here �-ou have a large shopping center and some of the spaces ma�-be on a second floor; but in the smaller retail developments, retailers ha�e found it difficult regardless of��hat the rent is,to be able to malce a success of it and malce it viable. It is difficult to get customers to go up to a second level. Also, the retailers on the first level usuall�- don't lilce to have the retail up above them at the same time; it creates a detei7ent to attract the highest quality retail tenant on the first floor as��e11. • Relative to office space, the5- felt that the small square footage ��ould malce it diff�icult to attract tenants. He said the�-do have a plan to come foil�ard ��ith an office development that «ould be rather significant do«n the street, closer to Cit�- Center that «ould be able to accommodate significantl�- more office space than ��hat the�- could provide if on the second floor of the building. • Relative to a concem from a resident about the potential use of apartment building rooftops being used for pa�ties and other sources of noise generation, he said there «ould not be an�- sources of noise generation from any type of rooftop amenity. 7 Cupertino Planning Commission 5 May 8, 2012 David Johnson, Christiani Johnson Architects: • Said that the goal of the project ��as to create a collection of pedestrian inclusive gathering places and a positive and memorable eiperience. The proposed project replaces an eiisting land use pattem that has the overall impression of an automobile parlcing lot; and theu attempt «as to create a more fine grained neighborhood consisting of streets lined «ith buildings and pedestrian friendl�- side��alks focused on open spaces. The use of underground pa�lcing enabled the site to be opened up, and provide la�ge court5-ards and side«alks. The project provides the advantages of miied-use development ��hich offers residents shopping ��ithin ��allcing distance. A variet�- of building heights ��as considered ranging from 1-1/2 stories to 2; buildings a�e contemporai�- st�-1e ��hich is compatible ��ith high tech companies in Cupertino. The�-��orlced ��ith staff on five submittals and responded to comments, met��ith the cit�-'s consultant and staff and made a number of significant changes based on the comments;resulting in a fine tuned project. Chair Miller opened the public hea�ing. Chris Zhang, Cupertino resident: • Opposed to the project. • Said the three issues he ��anted to discuss relative to the project a�e schools, traffic and parlcing. Relative to schools, he said he felt the reason the�- have not hea�d from the school board is that the schools are alread�-overcro��ded; it is not a question of��hen or if, and the�- cannot afford to have more students. He felt cit�- staff has provided a vei�- lo�� estimate of students��ithout elaborating ho�� the�-a�rived at the numbers, ��hich also occui7ed during the Sandhill project. • Traf£ic in that a�ea ��ill be impacted hea�il�- ��ith the addition of the ne�� Apple campus at Wolfe and the proposed project. • Relative to parlcing, there is not enough pa�lcing a�ound the particular a�ea and the addition of another 100 units��ould lilcel�-cause a shortage of parlcing. Ruby Elbogan, Cupertino resident: • Said she felt the project��as too dense;just��hen Cupertino is finally-getting more retail, the�- are proposing to talce 21,000 sq. ft. of retail and reduce it do��n to 7,000 ��hich is inappropriate. She commented that the ma�lcet ��as ��e11 lilced and ��ell used in the neighborhood and said that just because it «as not attractive, did not mean that it «as not popula���ith the residents. She also said that it��as odd that after updating the tree ordinance, the�- a�e no�� proposing to remove 70 trees, t��o of them specimen trees, and she felt it��as inappropriate. • The traffic is a serious concern especially in the morning ��hen children a�e being driven to schooL There a�e also safet�- concems relative to the children��alking to school, and crossing at the cross��alk because of the poor visibilit�-. Parlcing is an issue because there a�e 87 spaces for 87 apa�-tments. Jennifer Griffin,Rancho Rinconada resident: • Said she ��as pleased that the applicant respected the Heart of the Cit�-Plan; many- people in Cupertino ha�e spent a lot of time��anting to malce sure that the Hea�-t of the Cit�-is retained ��ith the lush green 35 foot setbacic do��n Stevens Creelc. She applauded the use of underground pa�lcing; as the sites get more congested, more density, underground pa�lcing is the��a�-to go as it frees up more suiface space. • She requested an update on the plans for the street trees and various trees on the project propert5-, as some ma�-be protected trees. • Other concerns include traf£ic problems;«hat sort of upgracles«i11 be made to the Blane�-and Stevens Creelc intersection;��hat monies are being put in b5-the developer to upgrade that poor 8 Cupertino Planning Commission 6 May 8, 2012 compacted intersection. Said she «as also concemed about the loss of the businesses and having small retail in the front. She commented about Chilis closing because their pa�lcing lot «as full «hen she visited recentl�-. Building A is severe loolcing; it is modem st�-1e and doesn't fit in��ith the other buildings. Priya Tiruthani, Cupertino resident: • Opposes the project. • Said the�-moved to Cupertino because of the eicellent schools and a�e a��a�e of the funding challenges the Cupertino schools face. It is because of this concern that the�-��ould lilce to halt an�- ne�� apartment communit�- ��ithin the bui7o��s of CUSD; starting ��ith this proposal to construct 101 ne�� apa�-tments. She said in her opinion apa�tments ��ere not a viable ��a�-for the communit�- to go, compa�ed to the condos and individual homes developed in the same area; because apa�tments seldom change hands, ra�ely- gets reassessed ��hich results in lo��er propert5-tai contribution undermining the contribution to the school s�-stem. Apartments a�e high densit�- units contributing to more students per squa�e foot a�ea; incoi7ect measures a�e used to generate student generation report to evaluate the impact; the student generation report tallcs about student generated per unit��hereas the coi7ect measure to use��ould be to have the students generated per$1,000 of propert5-tai. • She said the�-need to be more cognizant of the democratic shift to the�-oung families��ho can on1�- increase the number of students eipected per unit; the development fund provided b�- Promethius can help build additional classrooms, but��i11 fall short on the operational costs of the school district. Besides impact to the school, the high densit�- d��elling units increase traffic and pollution. • On behalf of other pa�ents ��ho sha�ed simila� concems about this development proposal, she urged the Commission to den�-the proposal. Murali Gandluru, Cupertino resident: • Opposed to the project. • He said he concurred «ith previous spealcers on man�- concems, but schools «as the number one concern. Although his son��as pa�t of a lottei�- s�-stem for Eisenho��er School last�-ea�, he ��as not sure he ��ould attend that school because of the over-flooding of the schools because of the apa�tment compleies. He said there is nothing ��rong ��ith ha�ing a fii of apa�tment compleies and homes, but the problem is that it is not sustaining the infrastructure; ��e a�e not helping due to the points mentioned rega�ding the property taies that apartment compleies pay��hich don't change hands often. • The elementai�- and high school districts in Cupertino a�e pa�t of the top districts in the Ba�- Area and if the infrastructure goes do��n,if Cupertino's students cannot attend the schools and are shuttled around from school to school because of overflo��, that is not a situation the residents«ant to be a pa�-t of. • Said that traf£ic is a serious issue along ��ith parlcing issues especially- in this pa�t of the neighborhood. Man�- of the points previousl�- mentioned are significant issues. Apple is building a huge complei; schooling is by fa�the number one issue. • He urged the Commission to give more serious consideration to aclding more apartment compleies as it��i11 cause ha�dships to man�-of the cui7ent residents of the a�ea. Chair Miller: • Cla�ified the�- ��ere not the Cit�- Council, but the Planning Commission and noted that the application��il1 go to the Cit�-Council June 5"' Mark Moshfegh, Cupertino resident: • Opposes the project. 9 Cupertino Planning Commission 7 May 8, 2012 Said that the proposed project land has been an e�-esore for 8 �-ea�s, and he did not feel the proposed project is the ans��er. In the past 8 y-ea�s there ha�e been a number of projects built «ithin a one mile radius. He aslced «hat evidence there«as to support more units. He said dail�- traffic is a mess, and he also disagreed ��ith the statements about number of school children that ��ould be generated b�- the proposed project. People move to Cupertino mainl�- because of the schools and families«i11 cram one or t«o lcids into a one bedroom apartment just so their children can attend Cupertino schools. • Said he«as concemed about the present number of vacancies in retail and commercial spaces and the�-did not need more empt5- spaces. He strongly-disagreed that the project«ould bring more jobs to the a�ea. Shirish Seetharam, Cupertino resident: • Opposes the project. • Said he has been a Cupertino resident since 1999 and his children have attended Cupertino schools. He finds it difficult to believe that there a�e no negative impacts on the school, as over the�-ea�s the sections have increased in the school. • Said he concurred ��ith the previous spealcer; another issue is that there is an eiisting la�ge apa�tment complei and the�- are building on top of it, creating a ghetto environment. It��as also mentioned about 12 different properties that eiist so that is 90% still open for altemative development;that should be considered. • Said he uses Blane�-Avenue to drive to ��orlc and disagrees ��ith the traffic assessment��hich is inconsistent��ith his eiperience of driving in that a�ea for man�-�-ea�s. He said he felt that man�-of the concems have been do��nplayed. • Said he ��as not in favor of the proposal moving foil�ard for the va�ious reasons cited. He urged the Commission to consider the feedback submitted to malce the right decision and not approve the proposed development. Ankura Sinku, Cupertino resident: • Opposed to the project. • Said a Ma�ch Cupertino Courier ne«s a�ticle addressed the poor middle school situation;man�- of the classrooms are being conducted in portable structures. The proposed development«il1 onl�-malce the school situation��orse. • Man�- fello�� communit�- members ha�e spoken about long traffic lines and congestion. He said he has «itnessed manv nea�-miss accidents because of the traffic; and students ride on both sides of the street��hich is dangerous. • One of the proposed eiits from the ne�� development is opposite to the eiit from Vander Court; the current eiit itself is dangerous; it��ill on1�-increase the cause for concern about the high potential for accidents. Phyllis Dickstein, Cupertino resident: • Opposes the project. • Resides in Trevenia Villas on the north side; said that the proposed number of housing units is eicessive; 25 units per acre is a cap not a goal;��hether that number of units should be built on a given site depends on the impact on the neighborhood in question ��ith consideration given to the number of multi-famil�-units al�eacl�-in place. • The intersection of Blane�-and Stevens Creelc is in balance no��, although there could possibly- be some more retail and there a�e some off�ices. The project ��ould eliminate eiisting businesses, some of ��hich ha�e been in eiistence for over 20 �-ears; the�- ma�- not be glamorous but the5- provide real seivices that the communit�- needs; a grocei�- store, barbershop, di�- cleaners; it is not lilcel�-that the�-��ill move out and then bacic in again. The�- ma5-get some high end shopping but not��hat the communit�-needs. 10 Cupertino Planning Commission 8 May 8, 2012 • Relative to multi-famil�-housing, there are 179 rental units at Biltmore, 46 condominium units in Trevenia and a to��nhouse development across the street from the Biltmore; this should be considered adequate for the intersection. She said she did not talce the conclusions of the EIR and traffic suive�-seriousl�; 101 or 99 units and the developer«i11 not even concede t«o units, ��hich means a minimum of 150 ca�s. Since the number of school children is being minimized, it means the cars belong to «orlcing adults, so the number of trips leaving and coming bacic suggested b5- the traf£ic surve�- is laughable; the suive�- should be redone. The traffic is held up ��hen the children go to and from school; ho�� can 150 additional ca�s have merel�- a minimal impact on traf£ic and air qualit5-. There is more traffic no�� more than has been considered. • She aslced��hen housing is supposed to be a third priorit5-,��hy the Heart of the Cit�-Plan calls for more than double the residential units that al�eadv eiist in the nai7o�� a�ea; on1�,-a blocic or t��o on each side. She said if the�-reall�-need 300 aclditional units in this small area, the fair «a�-to go is scatter side; it ma�- be more profitable for the developer and more convenient for the cit�-in overseeing development to have one la�ge one,rather than tluee small ones; but it is not fau to the eiisting residents. People��ho have moved to Cupertino and not do��nto��n San Jose eipect a less dense��a�-of life and that should be respected. • She urged the Commission not to adopt the resolution, but give it further stud�-. The�- a�e not sa5-ing there should be no housing, but that the project should be scatter sided; it is too dense for the intersection. • She commented that this meeting ��as the first opportunit5- the public had to acldress the Commission and aslced that in future the�- be informed ea�lier in the process, to allo�� more time to provide input. • She commented that there ��ere some sites on the north��est side of the intersection that a�e appa�ently- being ��a�ehoused, and rumors that the landlord is ti�-ing to get the third propert5- there. She aslced the Planning Commission to loolc into it and inform the public in advance of the plans for that area. Tom Huganin, Cupertino resident: • Said that the project should have had cit�-��ide notice;ho��ever both Planning Commission and Cit�-Council ha�e stopped the cit�-��ide noticing. • He said he��as disma�-ed to lea�n that there is a loss of 14,000 sq.ft. of retail, especiall�-��hen it is in an area��here it could be producing mone5-for the cit�-and the local econom�- In the nea� future there ��il1 be 12,000 Apple emplo5-ees in close proiimit5- to the proposed development. He said he��ould be eager to shop there; ho��ever, there ma�-not be an�-retail shops to shop in. At this point, the project needs to be rescoped to put the retail bacic to its original size or possibly-increase it and figure out a��a�-to do it. Dr. Darrel Lum, Cupertino resident: • Said his main concem is the densitv calculations; in accordance ��ith the Hea�t of the Citv Plan the total land a�ea used to calculate the maiimum allo��able residential densit�- for the proposed Stevens Creelc site eicludes the pa�lcing and land a�eas devoted to the commercial portion of the project. • Said in his opinion the densit�- calculations should be based on the actual area of the propert5- ��hich ��ould be the apa�tments and the Blane�- Avenue frontage, ��hich ��ould result in a lo��er densit�-. It appea�s that the calculations being used a�e for a building that has both residential and commercial uses in the same building,not t«o different pa�cels. Fari Aberg, Cupertino resident: • Opposed to the project. • Concui7ed ��ith other residents' comments on the project; said that the project��as too dense and the traf£ic stud�-��as a jolce. She suggested that the people responsible for the traffic stud�- 11 Cupertino Planning Commission 9 May 8, 2012 drive do��n No. and So. Blane�-Avenue during rush hour to eiperience the traffic. She reacl a statement from 2008 regarding the resident surve�-relating to support or opposition to building housing such as condos to��nhomes, and apartments in a�eas along Stevens Creelc from Stelling Road to Wolfe Roacl. On1�- 35% of the residents responded to the suivey, and the majorit5- ��ere opposed to having aclditional buildings at that intersection. She said the intersection ��as vei�- dangerous and the traffic ��as tei7ible; and suggested that the traffic studv be redone. Chair Miller closed the public hea�ing. Chair Miller: Aslced staff to address some of the questions raised during the public forum. Gary Chao: • Said that relative to the calculations for density, Dr. Lum��as coi7ect that the Heart of the Cit�- document does describe precisely the formula, the numbers, «hich a�ea�-ou are supposed to calculate and ��hich to eiclude. Historicall�- all residential projects in the Heart of the Cit�- have been allo��ed to use half��av to the middle to the central line of streets. • In terms of netting out the commercial land a�ea or building area for the purpose of calculating residential and city, the Heart of the Cit�-does sa�-that�-ou do have to net out the commercial area but it is veiy specif�ic. All parlcing areas devoted to this proposed project ha�e been considered and talcen out of the area in the calculation. It also talks about building areas devoted to commercial a�eas ��hich in this case, 7,000 sq. ft. that is also netted out in that calculation. In addition, in terms of peripheral supporting landscaping,��alk��ays,the Hea�t of the Cit�-assigns a 10%value to that. Aarti Shrivastava: • Relative to the concem about the safet�- of the school children at the intersection, pa�ticula�l�- if there is an outflo�� of students; she said the�- could look at the traffic report and see if an�- specific improvements ��ere recommended; such as ne�� side��alks at least along the project frontage. She said she��as not certain if there��ere any specific improvements recommended for Blane�-and Stevens Creelc but«ould be«illing to accept recommendations. • Relative to the cit«�ide noticing; typically the city has done cit���ide noticing for General Plan amendments for la�ge projects. The�- are consistent ��ith the ne�� public noticing procedures recentl�-enacted b�-ordinance, recommended b�-the Commission as«e11 as passed b�-the Council. She said it��as to encourage neighborhood meetings because it��as felt that it ��ould create a dialog rather than just the three minutes that spealcers have. Staff encouraged neighborhood meetings and the applicant held an open house ��here he ��as aslced to invite people to spealc at that meeting. All of the noticing ��as done consistent ��ith the ne�� ordinance; cit�-��ide notices go out for la�ge projects. Chair Miller: • Aslced��hat evidence there��as that more housing units��ere needed in Cupertino? • Aslced if the�-��ould characterize the issue as loolcing to bring jobs to the city, or that the jobs are there and those that ha�e been created are meeting the state's requirements to provide more housing for those jobs. Aarti Shrivastava: • Relative to the housing element, the state has issued the statement that there is a housing shortage in Califomia and cities a�e required to zone and select sites for housing. This is one of those housing element sites and the project is consistent��ith all cit�-'s policies. As fa� as the demand for housing, brolcers sa�-that the demand is vei�-high for housing in this a�ea. 12 Cupertino Planning Commission 10 May 8, 2012 • Said it«as a combination;major companies have lobbied the state to sa�-that if�-ou«ant us to continue to sta�-in the state, �-ou ha�e to malce housing affordable or��e can't find people to sta�- here. The Silicon Valle�- Leadership Group is a consortium of companies ��ho have identified housing as a major issue, and it is also hea�d from man�-employers. • Said that the decision to put housing and this densit�-of housing��as made t��o �-ears ago at a policy level. Evei�- 7 or 8 �-ea�s, the cit�- receives numbers from the state ��hich ABAG then divides for cities; one of the considerations is ho�� did the5-peiform last time on their housing element and cities that haven't performed ��e11��il1 get a penalt5-. In addition the�-have to find sites for units that the�- didn't build last time, «hich is aclded to the ne« allocation and more sites have to be found than to allocate for housing; that is the policy situation. City Attorney: • Eiplained that the pa�-ticula� project could be tumed do��n if there a�e specific reasons ��ith rega�d to the project in terms of its compliance, or lacic thereof��ith the va�ious codes and rules that the cit�-has. If there a�e design concems and other things, those can be addressed in some fashion; but to turn do��n the projects simply because there is a perception or desire to sa�- that��e don't need this housing ��hen in fact this is one of the designated housing sites, does not«orlc viabl�-from a legal standpoint because it is contra��-to evei-�--thing on the boolcs. Chair Miller: • Said there��as a concern eipressed that the calculation of potential school children��as on the lo�� side; staff indicated that it��as the school district that provided those numbers and not the cit�-. There ��as also a concem eipressed that the level of densit�- ��as too much for this particula� location in to«n. Also a concern «as mentioned about an Oalc tree and a Blacic Walnut tree. Aarti Shrivastava: • Staff��orlced ��ith the school demographer and the school district to get the report; staff is not the eipert on��hat the impacts a�e. When stud5-ing the densities, the�-aslc if the�-meet all the requirements and if the site plan ��orlcs. The subject project has been revie��ed b�- the fue depa�tment, public ��orlcs department, traffic engineer for the project as ��e11 as the traffic consultant��ho has prepared most of the cit�-'s traffic studies for the last 12�-ears. • Relative to the street trees along the project site, the a�borist recommended removal and replacement of one d5-ing tree; t«o trees a�e being removed to create the drive«a�- at the eastern end along the retail, but the remainder of the trees��il1 be retained. Com. Lee: • Staff ans��ered questions about calculations of the commercial land a�ea in comparison to the former chili's site. There a�e less retail squares no��; Chilis restaurant ma�- be demolished, giving more squa�es to residential; Chilis parcel ��as 47,000 sq. ft. and the amount of land dedicated to ne�� commercial under this project is 42,000. • Said she prefei7ed to save evei}- square for commercial, because that is ��here sales tai revenue comes from; squa�e for square it doesn't meet, but it meets evei�--thing else. The building heights, design, density, number of units, traf£ic, pa�lcing a�e all acceptable; and she did not ha�e any-problems«ith ingress and egress. Com. Brownley: • Said the project is consistent ��ith the General Plan and ��ith the Hea�t of the CitS- Specif�ic Plan. With housing element No. 4, it is a designated site for developing additional housing ��ithin the cit�-and in addition to that, the design of the space, creating an enhanced ��alkable commercial area along Stevens Creelc is something that the�- ha�e been ti�-ing to do. The�- used an a�chitectural consultant to come up ��ith the good commercial space that should be 13 Cupertino Planning Commission ll May 8, 2012 viable so that��hatever commercial space ��e do have ��i11 be good commercial space. The�- are creating a more fleiible area of commercial so that instead of one restaurant, it ��i11 become a potential spot for eiisting stores that a�e no« in an older building and ma5-be able to move into a ne�� building. They are creating outdoor seating in common areas; it is a vei�- ��alkable a�ea creating sepa�ate��ide side��alks along Stevens Creek and Blane�; it is going to be a nice space. • Complimented the enhanced circulation; said the�-have created a good amount of pa�lcing, the 1.74 spaces per apa�tment is better than comparison compleies throughout the cit�; the traf£ic stud�-said that traffic in that a�ea��il1 be acceptable; appreciated that there��as a consolidation of the drive��a�-s along Stevens Creelc and Blane�; there ��il1 be fe��er entrances on both of those streets. The underground parlcing ��ill malce the a�ea that people a�e using and living in more pleasing space; the a�chitectural consultant's suggestions on using different elements have been incorporated or ��i11 be before getting permits; tree removal and replacement, removing 67 or 68 trees and replacing them��ith 158 and maintaining a number of the trees on the site. There ��as outreach to the communit�- and questions ��ere acldressed; in the future perhaps have the communit�-involved ea�lier in the process. • Said he supported the project. Com. Brophy: • Said he felt the�- should loolc at the project in conteit of the condominium projects that��ere approved in the previous decade ��hich he ��ould categorize as being phy-sically- unattractive and higher densities, and incorporating retail that��as phy-sically-unattractive and not possible to ��orlc for. The proposed project has a lo��er densit�; it is 25 units per acre that Cupertino uses in the Heart of the Cit�-for multi-famil�-areas; and it should be compared��ith��hat other communities a�e permitting for ne�� rental projects. Mountain Vie�� cui7entl�- has 500 units under construction, and another 1,000 units in the entitlement pipeline; hence a 100 unit project is relativel�- small compared to a to��n much the same size and subject to the same economic pressures of a single large user talcing up all of the off�ice space. • He aclded that the retail space is a much more realistic concept and he appreciated that the applicant and staff a�e bringing something simila� compared to ��hat the�- sa�� in the previous decade. • He said another issue is their obligation under the state housing element. Cupertino is probably-going to approve a 3 million sq. ft. office development before the end of the �-ea�to seive as the Apple campus; and it«i11 be subject to public hea�ings and consideration b�-the Planning Commission and the Council. For a communit�- to sa�- it��ants to build the la�gest office complei in the Ba�-Area but does not��ant to talce an�-housing at all, it��ill be an eas�- target for a public interest la�� group, similar to��hat happened in previous�-ears. The type of housing that might be forced on the cit�- b�- either the state or the court ��ould be fa� less attractive to people in to��n in terms of phy-sical appearance and in terms of its impact on the schools etc. To ignore that in hope of having a perfect��orld ��here no ne�� housing��as built in Cupertino is just not realistic. • From an environmental perspective there is a great mismatch even before the Apple campus comes before them in terms of the mismatch bet��een the number of people ��ho ��orlc in the communit�- and the number ��ho reside there to the eitent that it is a project specificall�- designed for �-oung professionals ��ho ha�e to malce a fairly- good income to live in a ne�� apa�tment complei;that is in the best interest of the communit�-. • Rega�ding the school enrollment issue, he said he thought the school enrollment projections «ere done b�-the school district demographer,not somebod�-hired b�-the applicant or the cit�-. The ke�- thing is they are tallcing about predominantl�- one bedroom apa�tments being proposed; this being Cupertino there «ill be children living in one bedroom apartments, but the numbers «i11 be fa�less per d«elling unit in one bedroom apartments than the�-«ould be in three bedroom condos and certainl�-far less than the four and five bedroom homes that a�e 14 Cupertino Planning Commission 12 May 8, 2012 creeping up in this to��n as the older 900 sq. ft. homes from the 1950s are torn do��n and replaced b5-one and in some cases even t«o vei�-large homes. • Relative to the impact on taies, he pointed out that the consultant's article states that in the case of the Cupertino Union School District, the District does not depend upon propert5-taies, but rather gets a fiied amount because the propert5- tai base in Cupertino is lo��er than the minimum set b�-the state. Given their high student bod5-population,the impact��i11 not affect the total dolla�s going per student because the state is obligated to fulfill the difference bet��een��hat is called the basic aid amount. The high school district lives solel�-on property taies; ho��ever, the projection is that there��il1 be vei�-fe�� high schools students; a total of 6 in the entire district; and that the property taies paid for b�- this project per those 6 students ��i11 be greater than the a�erage spending for the per a�erage student. • He said he supported the project and proposed t��o changes. He suggested deleting Para. 7 on Page 23,that prevents pa�celization of retail sections apart from the residential section. He said that although he has been opposed to condominimizing tiny retail sections, he sa�� no reason ��h�- assuming the5- get an acceptable reciprocal easement agreement bet��een the residential and the commercial parcel,that the�-couldn't separate them out. • The second change is Pa�a. 9, Page 24 relative to public a�t. He suggested a second paragraph under Pa�a. 9, that��ould read: "at the applicant's discNetion the contNibz�tion towaNd pz�blic aNt may instead be met by contNibz�ting an eqz�al amoz�nt to the Cz�peNtino Edz�cational Endowment Fz�nd a���oN the FNemont Edz�cational Endowment Fz�nd foN the sz�ppoNt of aNtistic oN otheN cz�ltz�Nal pNOgNams in the pz�blic schools. " This is an amount that the developer is alread�- required to spend approiimatel�- $100K for it if he so chose. It ��ould be up to the applicant, and ��ould not change his total eipenditures to the communit�- but he said he felt it ��ould be of much greater value than a piece of a�t that loolcs lilce it came from the scrap 5-a�d; but that��ould be the applicant's decision. He said it��as his o��n sense that the public art he had seen at commercial projects has not been ��hat he considered to be a contribution to the cultural��e11 being of the community, but that is a requirement of the current cit�-ordinance. Chair Miller: • Said his colleagues did a eicellent job summa�izing the positives. He said that to some eitent ��hile the specific project��as not approved t��o�-ea�s ago,the use of the site and the densit�-of housing on the site ��as approved t��o �-ea�s ago, and at that time there ��as cit���ide noticing for the housing element. Some residents toolc it upon themselves to do their o��n stud�- and recommend some sites for housing in to��n for higher densit�-housing; and this��as one of the sites recommended b�-the resident groups. • The problem for the cit�-as others have mentioned is that construction of ne�� off�ice space is going up at a fast clip in Cupertino and evei�-bod�-��ants the additional office space for Apple Computer; and the additional office space that is being built in some other a�eas in to��n. • The state sa�-s �-ou have to aclhere to a balance bet��een the amount of jobs provided and the amount of housing provided; and their vie�� is that if�-ou don't do that, �-ou are increasing the traffic on streets and malcing them more dangerous because people a�e not just coming and going locally-, and ��allcing or using bilces to a greater eitent, but the�- are all driving on the high��a5-s and a�ound to��n at simila�times and the cit�-is the��orse for it. Other neighboring cities a�e addressing this��ith much higher densit�-units; Mountain Vie�� is on the order of 45 or 50 units per acre in do��nto��n Mountain Vie��. • In terms of the retail, ��e ha�e struggled ��ith retail at little sites lilce this in the past; and �-ou can loolc at the retail under La Trevenia and ho�� that struggles; the Metropolitan and ho�� that struggles, and on DeAnza Boulevard ��here Ameche's Pizza is; those little clusters of retail just do not seem to ��ork. The ke�- thing is not the quantity of retail but the quality of retail that reall�-matters and there are doubts about ho�� successful this site is going to be. We got smarter this time and had a retail consultant come in and help design the retail at this site so that it had a better chance of success. Some of the things done ��ere to malce the pa�lcing 15 Cupertino Planning Commission 13 May 8, 2012 visible from both sides of the building so if people driving b5- on an impulse could see there ��as an eas� �va�-to pull in. Another aspect��as the�-��ere ca�eful about ho�� deep the building ��as, lceeping in mind the lcind of uses that ��ould be located there and the amount of space the�-��ould need in terms of the depth of the building. Said although not a retail eipert, he understood that retail begets more retail, and the best «a�- to design retail in to«n is to condense it all in closer locations. That is��h�-the Marlcetplace is so successful; there is lots of retail there and people don't just malce one stop, and one of the reasons «e a�e so concemed about Main Street and malcing sure ��e ��ant to get more retail into Main Street, is because getting that retail together in one spot is critical to getting��hat people consider getting critical mass. While ��e did lose a little retail there, if in fact that retail generates more interest and more business and seives the residents better,«e«ill ha�e succeeded in that. • In general, the project is ��e11 designed and he noted that the applicant ��as ca�eful not to stretch the limits that the cit�-��ould allo��; he has not aslced for a single eiception, and for all those reasons and the others eipressed,he said he��ould support the project also. • Said the main one is the pa�celization of the retail vs. the apartments. Com. Brophy- also suggested some changes; also loolc carefull�- at a��a�-to malce sure that children crossing the intersection at Stevens Creelc and Blane�-are safe. Aarti Shrivastava: • Condition 7 sa�-s that a lot line is not approved at this time; it sa�-s that it is not supported and the Hea�t of the Cit�- discourages it. If the Council ��ishes to remove that, she noted that a parcel is not being approved at this time, but the last sentence is needed because there a�e tluee lots that need to be consolidated in order to build the project. The eiisting lot is still a condition of approval; you cannot build over lot lines. • Relative to the public a�-t; it is a creative thought, but it is an ordinance that cannot be«aived. The applicant is free to donate to an�- organization he ��ishes outside of the ordinance requirement. It is an ordinance requirement, so the applicant doesn't get a choice; he gets to donate if he��ishes. Com. Brophy: • Said he felt it«as a separate project and «ant the applicant to build it and lease it out; but in terms of sepa�ating it, did not see a problem. • Relative to Pa�a. 7, he said he understood staff's point, and ��as not opposed to lceeping No. 7, but��ould first remove the��ording "noN is itsz�ppoNting"��hich implies the5-are opposed to it. He said he disagreed ��ith the concept of the second sense,��hich sa�-s "the policy discoz�Nages the sz�bdivision of commeNCial paNCels" so technicall�- it is a subdivision of commercial parcels. He said he interpreted that language to mean the condominimizing seen in a number of projects on Orange Avenue; in this case referring to a single sepa�ation of retail from residential. Aarti Shrivastava: • Said that the statement can be removed, but noted there is a sentence in the Hea�t of the Cit�- that strongly- discourages pa�celization. The idea«as to lceep them consolidated and as la�ge as possible so the�- «ere able to be redeveloped and there «as more fleiibilit�; but the Commission could talce that out;it does not remove the Heart of the City policy. There��as not support for Com. Brophy's suggestion for teit modification. Motion: Motion by Com. Brownley, second by Com. Brophy, and carried 3-1-0, Com. Lee voted No; Com. Sun absent; to approve Application D P- 2011-06, ASA-2011-20, TR-2012-18 and EA-2011-16. 16 Cupertino Planning Commission 14 May 8, 2012 Com. Lee said she voted No because she felt evei}- squa�e foot of Parcel4 (Chili's pa�cel), should have been dedicated to commercial use. She said she supported the other three pa�cels being completely dedicated to housing as delineated in the housing element. Motion: Motion by Com. Brophy, second by Com. Lee, and carried 4-0-0, Com. Sun absent; to approve Applications DP-2011-05,ASA-2011-19, TR-2012-13, and EA-2011-15. OLD BUSINESS: None NEW BUSINESS: None REPORT OF THE PLANNING COMMISSION ENVIRONMENTAL REVIEW COMMITTEE: Chair Miller reported the committee revie��ed a house on a 30 degree slope on Rainbo�� Drive; it ��as approved from an environmental standpoint and ��i11 be presented to the Planning Commission in the nea�future. HOUSING COMMISSION: Neit meeting is MaS-9, 2012. MAYOR'S MONTHLY MEETING: No meeting. ECONOMIC DEVELOPMENT COMMITTEE: No meeting. REPORT OF DIRECTOR OF COMMUNITY DEVELOPMENT: • Written report submitted. Adiournment: The meeting ��as acljourned to the neit regula� Planning Commission meeting scheduled on Ma�-22, 2012 at 6:45 p.m. Respectfully-Submitted: /s/Elizabeth Ellis Elizabeth Ellis, Recording Secretai�- 17 CTTY OF CUPERTINO 10300 Torre Avenue Cupertino, CA 95014 CITY OF CUPERTINO PLANNING COMMISSION DRAFT MINUTES 6:45 P.M. Ma�-22, 2012 TUESDAY CUPERTINO COMMUNITY HALL The regula�Planning Commission meeting of MaS-22, 2012��as called to order at 6:45 p.m. in the Cupertino Communit�-Hall, 10350 Toi7e Avenue, Cupertino, CA. b�-Chair Mart�-Miller. SALUTE TO THE FLAG ROLL CALL Commissioners present: Chairperson: Mart�-Miller Vice Chairperson: Don Sun Commissioner: Winnie Lee Commissioner: Clinton Bro��nlev Commissioner: Paul Brophy- Staff present: Communit�-Development Director: Aa�-ti Sluivastava Cit�-Planner: Ga��-Chao Senilcor Planner: Colin Jung Assistant Planner: George Schroeder Cit�-Attome�-: Carole Korade APPROVAL OF MINUTES: None WRITTEN COMMUNICATIONS: None other than those related to the agenda. ORAL COMMUNICATIONS: None POSTPONEMENTS/REMOVAL FROM CALENDAR: 1. EXG2011-01,V02011-03, Hillside Eiception to allo�� a 4,478 sq. ft. single family- (EA-2011-17) residence plus an 840 sq. ft. basement to be constructed Barre Barnes on slopes of 30%or greater; Variance to allo�� an (Holiday Drive,LLC) attached first stoi�-decic more than 18 inches above gracle 21740 Rainbow Drive to be set bacic 0 feet from the propert5-line��here 10 feet is required. Reqz�est postponement to the Ji�ne 12, 2012 Planning Commission meeting Motion: Motion by Com. Lee, second by Vice Chair Sun, and unanimously carried 5-0-0 to postpone Application EXG2011-01, V-2011-03 (EA-2011-17) to the June 12, 2012 Planning Commission meeting. CONSENT CALENDAR: None 18 Cupertino Planning Commission 2 Ma�-22, 2012 PUBLIC HEARING 2. U-2012-12 Use Permit to allo�� the concurrent sale of motor vehicle fuel and Atam Sandhu alcoholic beverages at an eiisting gas station. Planning 1699 So. DeAnza Blvd. Commission decision final z�nless appealed. George Schroeder,Assistant Planner,presented the staff report: • Revie��ed the application for a conditional use permit to allo�� the concui7ent sale of gasoline and alcoholic beverages at an eiisting gas station, as outlined in the staff report. He revie��ed the site aerial sho��ing the proiimit5- of the gas station to residential a�eas, shopping center, office buildings and other gas stations. The project is consistent��ith the concui7ent sale of gasoline and alcoholic beverages ordinance and is compatible «ith the eiisting and planned uses in the a�ea. • The applicant has submitted a securit5- plan ��hich has been revie��ed b�- the Sheriff's Department��hich determined that there��ere no securit�- concems or negative impacts to the neighborhood. Conditions have been aclded for the propert5- o«ner to reimburse the cit�- in the event of additional sheriff's enforcement time. • Staff recommends that the Planning Commission approve the use permit for the concui7ent sale of gasoline and alcoholic beverages per the draft resolution. Atam Sandhu,Applicant: • He said he has complied ��ith the rules and regulations ��ith the cit�- and other departments. He said that the station has been at the location for about fort�-�-ears, and he has o��ned it for the past eight 5-ea�s. Chair Miller opened the public hea�ing; as no one ��as present to spealc, the public hearing ��as closed. Com. Brownley: • Commented that there ��ere other gas stations in Cupertino that sold beer and ��ine and the proposal is consistent��ith other stations ��ithin the city, the zoning ordinance and is located neit to a��ine shop. It is located over 245 feet from the residential a�ea, and he felt it��as reasonable to approve the application. Com. Brophy: • Noted for the record that a letter ��as received from the o��ner of Coach House Wine and Spirits objecting to the application; ho��ever, he felt that the arguments for the opposition��ere not persuasive. Motion: Motion by Com.Brownley, second by Vice Chair Sun, and unanimously carried 5-0-0 to approve Application U-2012-02 3. U-2011-09,ASA-2011-10 Use Permit to allo�� the conversion of eiisting gas station Dave Elliott,BP Cupertino seivice ba�-s to a convenience ma�ket,to allo�� late evening Union,LLC hours and to allo�� concurrent sales of gasoline and alcohol; 21530 Stevens Creek Blvd. Architectural and Site approval for a 527 sq.ft. eipansion/ remodel of an eiisting gas seivice station building to allo�� a convenience marlcet and a ne�� 2,580 sq. ft. office building. Planning Commission decision final z�nless appealed. 19 Cupertino Planning Commission 3 Ma�-22, 2012 Colin Jung, Senior Planner,presented the staff report: • Revie��ed the application for use permit and architectural site approval to allo�� the conversion of an eiisting gasoline seivice station ba�- to a convenience mart, and to allo�� late evening hours of operation and allo�� concui7ent sales of gasoline and alcohol, and eipansion/remodel of 513 sq. ft., and a ne�� 2,580 sq.ft. office building as outlined in the staff report. • He revie��ed the site aerial sho��ing the proiimit5- of the gas station to residential a�eas; and revie��ed the project data. The project is proposed in t��o phases; the first phase��ould be the convenience mart and the second phase,«hen tenants are obtained«i11 be the off�ice building. • The proposed project ��i11 eipand the pa�lcing spaces from 14 spaces to 22 spaces ��hich eiceeds the code requuements of 18; The proposal is for a 24 hour convenient ma�-t; currentl�- the gasoline seivice station has a 24 hour use approved in 1988; attendants a�e on dut�-from 6 a.m. to 10 p.m. and gas is a�ailable other hours through the eiterior credit ca�d machine. • The Sheriff's off�ice has loolced at the securit5- plan ��hich has been in place since 1988 and the�- ha�e no problems ��ith the proposed use or securit5- plan as adopted. The project is in compliance��ith the Monta Vista design guidelines. • Staff recommends that the Planning Commission approve the use permit in accordance ��ith the draft resolution as��e11 as the ASA application in accordance��ith the draft resolution. Dave Elliott,Applicant: • Thanlced staff for their assistance in malcing the project conform to the Monta Vista guidelines ca�efull�; said it��as a gate��a5-proj ect for Cupertino and the�-ha�e made eitra effort to malce it acceptable b5-design standa�ds for the cit�-. The application is for 24 hour operation for the convenience store and sale of gasoline; and limited hours for sale of beer and��ine. • He said the goal��as to have the immediate phases of the project constructed b�-the end of the �-ear; tenants have not �-et been secured for the second phase 5-et ��hich is eipected to be completed in a couple of y-ears maiimum. • He revie��ed the ABC regulations for sale of alcoholic beverages. He revie��ed the tentative plans for the office building, from one to three tenants. A restaurant��ould require a zoning modification. Vice Chair Sun: • Eipressed concern about the sale of beer and alcohol to college students in the late hours. Dave Elliott: • Eiplained that after specified hours the beer and alcohol a�e not visible for sale and not permitted for sale; the lights b5- the displa5- cases are tumed off and a shacle covers the refrigerator units and the products a�e not visible for sale. The business operator is responsible to monitor the sale of it after hours. The police department has loolced at it and there is no histoi�-of problems��ith this lcind of operation; although it is close to DeAnza College and the free«ay, the�- do not anticipate any- problems. He referred to a project in Oaldand he «as involved ��ith, ��here the police depa�tment had the abilit�-to have his cameras linlced to their cell phones; if the5-got called the�- could see ��hat��as going on at the station��hich detei7ed crime at his business. • He said he«ould agree to not sell alcohol after midnight, as suggested b5-Vice Chair Sun. Colin Jung: • Said it «as «ithin the Planning Commission's puivie« to acld a condition to the use permit resolution to include hours of sale of alcohol, if that is the Commission's desire to limit the sale to midnight. He highlighted Condition 8, on Page 35 of the resolution, relative to security, «hich he said could be aclded as part of the securit5- plan. He aclded that the condition ��as alread�- on the propert5- because in the past the gas station ��as allo��ed to operate 24 hours a da�-. 20 Cupertino Planning Commission 4 Ma�-22, 2012 Chair Miller opened the public hea�ing; as there ��as no one ��ho ��ished to spealc, the public hea�ing��as closed. Gary Chao: • Cla�ified that the eipiration on the use permit approval is t��o �-ears and it is not mentioned in the resolution; the applicant needs to vest the permit��ithin t��o �-ea�s��hich is Ma�-22, 2014. Staff��i11 ensure the date is included in the resolution. • Relative to the phasing, there are t��o buildings potentiall�- to be built; it is the intent of the applicant to build the convenience marlcet fust. Even if the�- built the convenience marlcet first,that is rea11�-on1�-vesting the convenience ma�lcet; the t��o�-ears also applies to the office building, so the5- need to malce sure the�- lceep the permit process open and there ma�- be a possibilit5- for an eitension if the�- need a one-time eitension for another �-ea�, but the�- do need to tracic that time. If the�-build a convenience ma�lcet it doesn't mean that the�-vested the entire project; the off�ice building ��ould ha�e to be built��ithin t��o �-ea�s of the date of the approval as��e11. • Said that in order for the office building to be considered as vested,the�-��ould have to file for a building permit and demonstrate substantial groundbrealcing «orlc; the�-«ould have to call for inspection for trenching for the foundation or similar, so that there is actually- phy-sical activit�-; and once that happens,that is considered vesting of the permit and then the eipuation of the building permit talces over. • That in itself has some requirements and it has to be lcept active and demonstrated ��ithin so man�- months and an inspection. The initial period for the building permit is 6 months bet«een each inspection once the�-brealc ground, pull an inspection; the�-are subject to do that at sii months per inspection. • He cla�ified that in the use permit condition, after Planning Commission approval, the project «ould still have to be revie«ed and the actual ABC license «ould have to be secured from ABC; there is no condition that spealcs to that or talks about concui7ent sale of gasoline, or alcoholic beverages. • He refei7ed to Cond. 9, Page 35, and said the Commission could consider adding language in that final condition to include that the applicant shall be responsible to secure the necessa��- permits and approval from ABC. Com. Lee: • Said that the a�ea��as upscale; it is not at the edge of the cit�-or at the border��here the other one��as; it is in the Monta Vista area and b�-Cupertino schools. There a�e other businesses in that a�ea ��hich ha�e been a�ound for a long time. She said she ��as concemed that the proposed projectmight degracle the area some��hat. Com. Brophy: • He said that he resided in the a�ea, and did not feel the project«ould degrade the a�ea. There are controls in the ordinance to malce sure that the Sheriff's Dept. is satisfied ��ith an�- legal issues. • Relative to Ga��- Chao's ea�lier comment, he refei7ed to a paragraph on the previous item on the agenda covering ABC approval and suggested the�- add it to this application, Pa�a. 4 on Page 9. Com. Lee: • Cla�ified that she felt the overall project is a good project; it is an under-utilized piece of land; it could be a good commercial or office space in the future and some good tenants; the design and a�chitecture a�e good; and the�- a�e malcing good use of the pa�lcing. Said she «ould support Vice Chair Sun's suggestion about limiting the sale of alcohol to a certain hour. 21 Cupertino Planning Commission 5 Ma�-22, 2012 Vice Chair Sun: • Said he appreciated that the applicant��as��illing to accept the suggestion to limit the hours of sale of alcohol to the certain hours, especially to midnight. He said he ��as concemed about businesses selling alcohol after midnight and the potential impacts on the communit�- in the event there a�e accidents or loss of life resulting from the sale and consumption of alcohol after hours,pa�ticula�l�-in the area of DeAnza College. Com. Brownley: • Reiterated the comments of other Commissioners that it ��as a good project consistent ��ith man�-of their plans, and specifically-the General Plan in Monta Vista a�ea; it��i11 create a nice marlcet in that corner and ��i11 be a benefit to the a�ea. The ne�� office space is great; talcing advantage of that land as Com. Lee mentioned. He said he felt it«as important to acld the language suggested by staff. • Supports the��orth��hile project. Chair Miller: • Said he supported the project. Motion: Motion by Com. Brownley, second by Com. Brophy, and unanimously carried 5- 0-0 to approve Application U-2011-09 and ASA-2011-10, in accordance with the draft resolutions; with the modifications stated by Commissioners and staff including that the use permit is good for two years with the date mentioned by staff; and adding language about the necessity of securing additional permits through ABC, as well as the timing of alcohol sales ending at midnight; with the expiration of the use permit to be May 22,2014. 5. CP-2012-01,EA-2012-03 CIP Conformance to the General Plan City of Cupertino Revie�� of the five-�-ear Capital Improvements Program Citywide Location (FY 2012-13 to 2016-17) for conformit�-to the Cit�-of Cupertino's General Plan. Tentative City Coz�ncil date: 6--�-2012 Colin Jung, Senior Planner,presented the staff report: • Revie��ed the application summai�-for the 5-�-ear Capital Improvement Program, FY 2012-13 to 2016-17 for General Plan consistenc�-as outlined in the staff report. • As��ith previous revie��s, the focus��i11 be on1�-the first�-ear projects, since projects in y-ea�s t��o tluough five are for long eiperience uncertain in terms of duration and funding and priority; and the on1�-certaint�-��ith CIP is the fust�-ea�funding projects. • He revie«ed the first �-ear CIP projects final aclditions and deletions. Additions include the Blackbei7y golf course irrigation upgrade and pond modification; McClellan Ranch education center; and seivice center sola� carports cost/benefits stud�-. Deletions include Cit�- Hall essential building upgracles,and Civic Center Master Plan projects. • He revie��ed the General Plan consistenc�- findings as listed on Pages 2 and 3 of the staff report (Po��erPoint presentation), including projects relating to: transportation; trails, side��alks and repair thereof; fenced dog pa�lc; acquisition of Stevens Creelc trail linlcages; parlc and repair «orlc, renovation; projects that reduce flood rislcs; and projects that provide for conseivation and eff�icient use of energy-resources. • The Environmental Revie�� categoiy��as revie��ed, and proj ects affected ��ere listed on Pages 4 and 5 of the staff report and included in the Po��erPoint presentation. 22 Cupertino Planning Commission 6 Ma�-22, 2012 • Staff recommends a Negative Decla�ation for the project, eicluding the projects that need deferred anal�-sis; and adopting a model resolution finding the CIP consistent��ith the General Plan. Gary Chao: • Said that the ERC ��il1 loolc at the project on a programmatic level prior to the Council adopting the five �-ea� CIP Program, to malce the finding that it is or is not consistent��ith the General Plan polic5-, or is ��ithin the compatibilit5- of one of the policies. Once the program gets defined b�-the Council it«i11 come bacic to the Planning Commission for more detail. Chair Miller opened the public hea�ing; as there ��as no one ��ho ��ished to spealc, the public hea�ing��as closed. Motion: Motion by Com. Lee, second by Com. Vice Chair Sun, and unanimously carried 5-0-0 to approve Application CP-2012 and EA-2012-03 OLD BUSINESS: None NEW BUSINESS: None REPORT OF THE PLANNING COMMISSION ENVIRONMENTAL REVIEW COMMITTEE: • Chair Miller reported that the CIP item and the hillside property a�e being developed and ��il1 be presented to the Planning Commission in the nea�future. HOUSING COMMISSION: • Com. Brophy reported there��as a discussion about revising ho�� the communit�-development block grant revie�� ��ould occur neit�-ear. MAYOR'S MONTHLY MEETING: No meeting. ECONOMIC DEVELOPMENT COMMITTEE: No meeting. REPORT OF DIRECTOR OF COMMUNITY DEVELOPMENT: Gary Chao reported on Council action from the May 15 meeting: • The Islands Bar and late night hours appeal ��ent to Council, and the appeal ��as denied; the Planning Commission's approval��as upheld;nothing��as changed. • Petition for reconsideration for the subdivision at Bollinger Roacl, a determinus at the Bollinger Road subdivision «as also considered b�- the Council and the�- heard the reconsideration but upheld the Planning Commission decision to approve the subdivision. • Main Street Cupertino project b5-Sandhill��as approved��ith minor changes. Adiournment: The meeting ��as acljourned to the neit regula� Planning Commission meeting scheduled on June 12,2012 at 6:45 p.m. Respectfully-Submitted: /s/Elizabeth Ellis Elizabeth Ellis, Recording Secretai�- 23 OFFICE OF COMMUNITY DEVELOPMENT CITY HALL 10300 TORRE AVENUE • CUPEPTINO,CA 9501�-3255 (�08)777-3308 • FAX(408)777-3333 • �lanning@cu�ertino.org CUPERTINQ PLANNING COMMISSION STAFF REPORT Agenda Item No. 3� Agenda Date: Tune 12,2012 Application: EXC-2011-11,V-2011-03,TR-2012-19, EA-2011-17 Applicant: Barre Barnes ProperEy Owner: Holiday Drive, LLC ProperEy Location: 21740 Rainbow Drive (APN 366-03-063) APPLICATION SUMMARY: Residential Hillside Exception for a new 4,478 square foot single-family residence plus an 840 square foot basement to be constructed on slopes greater than 30% on a vacant lot. Variance to allow an attached first story deck more than 18 inches above grade to be setback zero feet from the property line where 10 feet is required. Tree Removal Reauest to allow the removal and replacement of a 20" diameter, two-trunked, Coast Live Oak and a 28" diameter,three-trunked,Coast Live Oak RECOMMENDATION: Staff recommends that the Commission approve: • A mitigated negative declaration for the project,file no. EA-2011-17, • The Residential Hillside Exception and Tree Removal Request per the draft resolutions (Attachment 1). Staff recommends that the Coii�u�ission deny the variance request per the draft resolution (Attachment 1). Project Feature Ordinance Proposal Consistency Requirement with City Ordinance Residential Buildin S uare Foota e Total Proposed Building 5,640 sq. ft. max. 5,318 sq. ft. Yes Area 4,478 sq. ft excluding basement Total Proposed Living n/a 4,714 sq. ft. Yes Area(excludin��ara�e) Basement� Exempted from sq. ft. calc. 840 sq. ft. Yes Gara�e 441 sq. ft. min. 604 sq. ft. Yes Entr Level(1st Floor) n/a 216 sq. ft. Yes Main Level(1st Floor) n/a 2,815 sq. ft. Yes 24 Barre Barnes(Holiday Drive, LLC) EXC-2011-11,V-2011-03,TR-2012-19,EA-2011-17 June 12, 2012 Upper Level (2nd Floor) n/a 843 sq. ft. Yes Project Feature Ordinance Proposal Consistency Requirement with City Ordinance Setbacics 1�t Floor 211a Floor 1�t Floor 211a Floor Front 10' min. (grade 25'min. 91' 95' Yes >20%) Sides 10' min. 15' min. 13' 8" 16' 7" Yes Rear 20' min. 25' min. 340' 355' Yes Deck Setback(> 18" 10' min. 0' No, variance above orade) requested Other Re uirements Buildin�Hei�ht 30' max. 30' Yes Grading Quantity in 2,500 cubic yards max. 821 cubic yards Yes cubic ards Parkin� 6 spaces min. 6 spaces Yes �Per Ordinance,basement square footage is not counted towards the floor area of the house. BACKGROUND: Project Site £�Development Rec�uests The applicant, Barre Barnes of Holiday Drive, LLC, is requesting a hillside exception to facilitate the construction of a new, 4,478 square foot, single-family, split-level residence on a slope greater than 30% in a RHS zoning district. The proposal has an 840 square-foot basement with the three story element in the front of the residence and the two story portion toward the rear. The lot is vacant but surrounded by other hillside single-family residences in the Regnart Canyon area of Cupertino. The property is accessed via a private driveway off of the Rainbow Drive cul-de-sac. The project parcel is part of a two-lot subdivision approved in December 1998. Recently, the Planning Commission approved a hillside exception and a variance request for another hillside residence on the adjacent lot (Steakley Residence) in March 2011. As part of the project, the applicant is requesting a hillside exception to construction 5,318 square feet of building on a slope greater than 30% when 500 square feet is allowed. In addition, a variance is being requested to allow an attached ground floor deck with zero setback from the side property line when 10 feet is required by the Ordinance. The zero setback line is requested along the Midpeninsula Regional Open Space District property. DISCUSSION: Zoning Consistency With the exception of the proposed building over 500 square feet on a slope over 30% and the deck setback variance, the proposed home complies with all other aspects of the Zoning Ordinance (Residential Hillside&Accessory Structure). Etception for Development on Slopes Greater Than 30% The Residential Hillside Ordinance (RHS) prohibits any structures or improvements over 500 square feet in area on slopes greater than 30% unless an exception is granted. The intent of this rule is to minimize and discourage unnecessary hillside grading activities and visual disturbances. However, if the 25 Barre Barnes(Holiday Drive, LLC) EXC-2011-11,V-2011-03,TR-2012-19,EA-2011-17 June 12, 2012 project/property presents unique circumstances or hardships (typically physical/geographical challenges), then the City may consider an exception provided that the project is designed to minimize the extent of exception and impacts to the surround hillside. The project is being proposed on a portion of the property that has the shallowest slope, few visual impacts, will cause the least amount of grading and remove the fewest protected trees. The location of the proposed residence is also severely restricted by the steep slopes,location of the driveway, geometry of the lot, and the presence of a 75-foot wide PG&E easement that runs lengthwise through the lot. The proposed location for the residence is the only feasible location. Under such circumstances the Planning Commission has approved hillside exceptions for residences to allow a reasonable use of private property. Variance Rec�uest for Setback of First Floor Deck The Accessory Structures Ordinance requires that accessory structures, such as a deck, with a height greater than 18 inches from grade must be setback a minimum of 10 feet from the property line. The regulation is needed to protect the privacy of adjacent neighbors in typical situations when buildings and yard areas are close together and the grade of the ground is relatively even. This proposed project site presents an atypical situation where the grade of the ground is very steep and the adjacent southerly landowner is the Midpeninsula Regional Open Space District (MROSD), a public open space agency. Plans were distributed to MROSD and verbal comments were received. Open areas to the north are not suitable for the deck as those areas lie within the PG&E utility easement area. Areas to the east and west are steeper in slope or occupied by the driveway. The applicant is requesting a variance approval to allow the first story deck to be setback zero feet from the southerly side property line for a length of 28 feet. MROSD is concerned with the project given that the proposed deck with a zero property line setback will have no defensible space for fire protection and that there might be some visual impacts from the project as viewed from certain vistas and/or trails. MROSD is recommending that the variance request not be granted and that the deck be adequately setback from the property line to create a safety buffer for the dwelling. In order to address the fire safety issue, staff is recommending that the variance request be denied and that the proposed deck be constructed from fire resistant materials (i.e., alternative fire rated materials as determined to be appropriate by the Fire Department or non-combustible material such as metal). Without the variance, the minimum setback for the deck as prescribed by the Accessory Structures Ordinance is 10 feet. The fire safety concern was also discussed with the applicant and he is agreeable with the denial of the variance. The proposed deck has a finished elevation of 663 feet,while the nearby ridgeline of the adjacent MROSD parcel is nearly 100 feet higher at about 760 feet. There will be no visual impacts into the majority of the MROSD lands. Neither the deck (nor the residence) is located on a prominent ridgeline nor are there any nearby hillside residences. Tree Removal £�Landscaping Two arborist reports were prepared for this project: one commissioned by the applicant (Shady Tree Company - Attachment 2) and another comprehensive report prepared by the City Arborist (Michael Bench - Attachment 3). There are numerous protected trees on the property, but only a few would be affected because of the restricted footprint of the residence. The recommendations are summarized in the table below. 26 Barre Barnes(Holiday Drive, LLC) EXC-2011-11,V-2011-03,TP-2012-19,EA-2011-17 June 12, 2012 City Tree Trunk Condition Shady Tree Company City Arborist Arborist Species Diameter Recommendations Recommendations Tree Report No. 1 Coast Live Oak 18" Excellent n/a Retain tree. Require protective fencin�. 2 Coast Live Oak 12" (x2 Fair n/a See comments for Tree trunks) No. 1. 3 Coast Live Oak 14" Good n/a See comments for Tree No. 1. 4 Toyon Shrub n/a n/a See comments for Tree No. 1. 5 Coast Live Oak 24" Good n/a See comments for Tree No. 1. 6 Valley Oak 10" Excellent n/a See comments for Tree No. 1. 7 Coast Live Oak 28" (x3 Fair to Retain, oak. Cut Remove. Basement trunks Poor roots clean, wrap grading too close to roots, monitor roots. Tree is a stump regularly,etc. sprout & hazardous lon�term. 8 Coast Live Oak 20" (x2 Poor Remove, heavy lean Remove. Heavy lean trunks) and trunk cavity. and trunk cavity. Hazardous lon�term Since Tree Nos. 7 & 8 are deemed hazardous by the City Arborist, staff recommends their removal. A condition of approval requires tree replacements, in this case four 24" box or two 36" box Oaks to be placed in appropriate locations on the site. Replacement locations shall be determined prior to building permit submittal. Mitigation to protect trees not being removed (Trees No. 1-6) is incorporated in the resolution. Geological Review The applicant commissioned a geologic report for his project prepared by Earth Investigations Consultants (Attachment 4 & 6). The report was reviewed by the City Geologist (Attachment 5 & 7). The City Geologist concluded that sufficient information has been presented to demonstrate the geotechnical feasibility of the proposed residence. The recommendations of Earth Investigations Consultants and the City Geologist have been incorporated as a condition in the approval resolution. Building Materials and Colors The building colors comply with RHS design standards in that they are muted vegetative or earth tones with low light reflectance values (< 60 LRV-see Attachment 8). 27 Barre Barnes(Holiday Drive, LLC) EXC-2011-11,V-2011-03,TR-2012-19,EA-2011-17 June 12, 2012 Prepared by: Colin Jung AICP,Senior Planner Reviewed by Approved by /s/Gary Chao /s/Aarti Shrivastava Gary Chao Aarti Shrivastava City Planner Community Development Director ATTACHMENTS: Attachment 1: Draft Resolutions for EXC-2011-11,V-2011-03,TR-2012-19 Attachment 2: Tree Report for New Construction-21740 Rainbow Drive,Cupertino,CA dated October 18, 2011 by The Shady Tree Company Attachment 3: Evaluation of the Existing Trees at 21740 Rainbow Drive,Cupertino,California prepared by Michael L. Bench,Consulting Arborist, dated November 17,2011. Attachment 4: Geotechnical Investigation/ Proposed Residential Development/21740 Rainbow Drive/Cupertino, California,prepared by Earth Investigations Consultants, dated October 15,2011. Attachment 5: Geotechnical Peer Review/Proposed Single Family Residence/21740 Rainbow Drive prepared by Cotton,Shires and Associates,Inc. dated November 25,2011. Attachment 6: Reply to Geotechnical Peer Review/Proposed Residential Development/21740 Rainbow Drive/Cupertino,California,prepared by Earth Investigations Consultants, dated March 16,2012. Attachment 7: Supplemental Geotechnical Peer Review/Proposed Single Family Residence/21740 Rainbow Drive,prepared by Cotton,Shires and Associates,Inc. dated Apri125,2012. Attachment 8: Color&Material Board for 21740 Rainbow Drive Attachment 9: Initial Study,ERC Recommendation, Negative Declaration Attachment 10: Plan set G\Plminin�APDREPORT\2011�xcn��ports\ EXC-2011-11,V-2011-0�TR-2012-19.docx 28 �i EXG2011-11 � CITY OF CUPERTINO 10300 Torre Avenue Cupertino,California 95014 DRAFT RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF CUPERTINO APPROVING A HILLSIDE EXCEPTION TO ALLOW THE CONSTRUCTION OF A '�, NEW 4,478 SQUARE FOOT SINGLE FAMILY RESIDENCE WITH AN APPROXIMATELY ' 840 SQAURE FOOT BASEMENT ON SLOPES GREATER THAN 30% ON A VACANT I "� LOT LOCATED AT 21740 RAINBOW DRIVE SECTION I: PROTECT DESCRIPTION Application No.: EXG2011-11 (EA-2011-17) Applicant: Barre Barnes (Holiday Drive,LLC) Location: 21740 Rainbow Drive. APN#366-03-063 SECTION II: FINDINGS FOR EXCEPTION WHEREAS, the Planning Coinmission of the City of Cupertino received an application for a Hillside Exception, as described on Section II of this Resolution; and WHEREAS, the necessary notices have Ueen given in accordance with the Procedural Ordinance of the City of Cupertino, and the Planning Commission has held one or more Public Hearings on this matter; and WHEREAS, the applicant has met the burden of proof required to support this application, and has satisfied the following requirements: 1. The proposed development will not be injurious to property or improvements in the area nor be detrimental to the public health and safety. 2, The proposed development will not create a hazardous condition for pedestrian or vehicular traffic. 3. The proposed development has 1ega1 access to public streets and public services are available to serve the development. 4. The proposed development requires an exception,which involves the least rnodification of, or deviation from, the development regulations prescribed in this chapter necessary to accomplish a reasonable use of the parcel. ' 5. All alternative locations for development on the parcel have been considered and have been I found to create greater environmental impacts than the location of the proposed development. � � 6. The proposed development does not consist of struciures on or near lrnown geological or ! - environmental hazards that have been determined by expert testimony to be unsafe or hazardous to structures or persons residing therein. 7. The proposed development includes grading and drainage plans that will ensure that erosion and scarring of the hillsides caused by necessary construction of the housing site and improvements will be minimized. 8. The proposed development consists of structures incorporating designs, colors, materials, and outdoor lighting which blend with the natural hillside environrnent and which are designed in such a manner as to reduce the effective visible mass, including building height, as much as possible without creating other negative environmental impacts. 29 Draft Resolurion EXG2011-11 June 12,2012 , 9. The proposed developrnent is located on the parcel as far as possible from public open space II preserves or parks (if visible therefrom), riparian corridors, and wildlife habitats unless such location will create other,more negative environrnental impacts. 10. The proposed development is otherwise consistent with the City's General Plan and with the II purposes of this chapter as described in Section 19.40.010. NOW,THEREFORE, BE IT RESOLVED: That after careful consideration of the initial siudy, Environmental Review Committee recornrnendation, maps, facts, exhibits, testimony and other evidence submitted in this matter, the Comtnission finds that i the project with mitigations incorporated will not have a significant environmental impact and adopts a rnitigated negative declaration with a mitigation monitoring report (file no. EA-2011-17) and application no, EXC-2011-11 is hereby approved; and � That the subconclusions upon which the findings and conditions specified in this Resolution are based and contained in the Public Hearing record concerning Application EXG2011-11, as set forth in the ' Minutes of the Planning Coinrnission Meeting of June 12,2012 and are incorporated by reference herein, ' SECTION III: CONDITIONS ADMINISTERED BY THE COMMUNITY DEVELOPMENT DEPT. 1. APPROVED EXHIBITS Approval is based on the plan set titled: "21740 Rainbow Drive/Single Family Residence-New Construction/21740 Rainbow Drive,Cupertino,California" dated October 25. 2011, and consisting of 11 sheets labeled A000, A00 through A09 and an Engineering plan set prepared by Nordic Engineering,Inc. titled: "21740 Rainbow Drive/Cupertino,California" dated October 2011 consisting ' of 4 sheets labeled 1 through 4, except as may be amended by the conditions contained in this resolution. ' 2. EXTERIOR BUILDING MATERIALS/TREATMENTS,LANDSCAPING ' ; Final building exterior treatment plan (including but not limited to details on exterior color, material, ' architectural treatments and/or embellishments, lighting, retaining walls and landscaping) shall be � reviewed and approved by the Director of Cornmunity Development prior to issuance of buiTding � � permits for compliance to RHS zoning and other relevant regulations. Any exterior changes determined to be substantial by the Director of Comrnunity Development shall require a modification approval with neighborhood input. i i 3. NOTICE OF FEES DEDICATIONS RESERVATIONS OR OTHER EXACTIONS I The Conditions of Project Approval set forth herein may include certain fees, dedication requirements, reservation requirements, and other exactions. Pursuant to Government Code Section 66020(d) (1),these Conditions constitute written notice of a staternent of the amount of such fees, and ' a description of the dedications, reservations, and other exactions. You are hereby further notified that the 90-day approval period in which you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code Section 66020(a), has begun. If you fail to file a protest within this 90-day period complying with all of the requirements of Section 66020, you will be legally barred from later challenging such exactions. , 4. GENERAL PLAN DEVELOPMENT ALLOCATION The applicant's project is granted a General Plan Development Allocation of one dwelling unit from the Other Residential Neighborhoods allocation pool. 2 � 30 Draft Resolution EXG2011-11 June 12,2012 �, ------------------------------------------------------------------------- ------------------------------------------------------------------------- 5. LANDSCAPE PROTECT SUBMITTAL � Prior to issuance of building permits,the applicant shall determine in consultation with staff whether I a full landscape project submittal per section 14.15.040 of the Landscaping Ordinance is warranted. ' The Water-Efficient Design Checklist (Appendix A of Chapter 14.15), Landscape and Irrigation Design Plans, and Water Budget Calculations shall be reviewed and approved to the satisfaction of the Director of Comrnunity Development prior to issuance of building permits. 6. LANDSCAPE INSTALLATION REPORT � In conjunction with any required landscape project submittal, a landscape installation audit shall be conducted by a certified landscape professional after the landscaping and irrigation system have � been installed. The findings of the assessment shall be consolidated into a landscape installation report. � i The landscape installation report shall include, but is not limited to: inspection to confirm that the � landscaping and irrigation system are installed as specified in the landscape and irrigation design plan, system tune-up, system test with distribution uniformity, reporting overspray or run-off that causes overland flow,and preparation of an irrigation schedule. The landscape installation report shall include the following statement: "The landscape and irrigation system have been installed as specified in the landscape and irrigation design plan and cornplies with the criteria of the ordinance and the permit." 7. LANDSCAPE AND IRRIGATION MAINTENANCE In conjunction with any required landscape project submittal, a maintenance schedule shall be established and submitted to the Director of Comrnunity Development or his/her designee, either with the landscape application pacl<age,with the landscape installation report, or any tirne before the landscape installation report is submitted. a) Schedules should tal<e into account water requirements for the plant establishment period and i water requirements for established landscapes. ; b) Maintenance shall include, but not be limited to the following: routine inspection; pressure � ' testing, adjustment and repair of the irrigation system; aerating and de-thatching turf areas; replenishing mulch; fertilizing; pruning; replanting of failed plants; weeding; pest cont�ol; and removing obstructions to emission devices. c) Failed plants shall be replaced with the same or functionally equivalent plants that may be size- adjusted as appropriate for the stage of growth of the overall installation. Failing plants shall either be replaced or be revived through appropriate adjustxnents in water, nutrients, pest control or other factors as recommended by a landscaping professional. 8. ATTACHED DECK The proposed ground level deck shall be constructed from fire resistant materials (i.e., alternative fire i rated materials as determined to be appropriate by the �anta Clara County Fire Department or non- �, combustible material such as metal). ' - 9. PERMIT EXPIRATION The subject hillside exception approval shall expire two (2) years from the date of approval if not ; _ used. j SECTION IV: CONDITIONS ADMINISTERED BY THE PUBLIC WORKS DEPARTMENT 10. STREET WIDENING ; Public street widening and dedications shall be provided in accordance with City Standards and specifications and as required by the City Engineer. 3 � 31 , Draft Resolution EXC-2011-11 June 12,2012 �I ___________________________________________________________________________ I 11. CURB AND GUTTER IMPROVEMENTS Curbs and gutters, sidewall<s and related structures shall be installed in accordance with grades and standards as specified by the City Engineer. 12. STREET LIGHTING INSTALLATION i Street lighting shall be installed and shall be as approved by the City Engineer. Lighting fixtures �� shall be positioned so as to preclude glare and other forms of visual interference to adjoining I properties, and shall be no higher than the maxirnurn height permitted by the zone in which the site ' is located. 13. GRADING Grading shall be as approved and required by the City Engineer in accordance with Chapter 16.08 of the Cupertino Municipal Code. 401 Certifications and 404 perrnits maybe required. Please contact Army Corp of Engineers and/or Regional Water Quality Control Board as appropriate. i The developer wi11 be required to provide both a geotechnical recornmendations as well as structural �� design and calculations for any retaining greater than 4-feet in height from the bottom of the I foundation to the top of the wall. Review of these documents will be perforrned by the City's third ' party reviewers, and the developer will be required to post deposits with the Public Worl<s Departrnent prior to review and approval of retaining wall designs. � 14. DRAINAGE Drainage shall be provided to the satisfaction of the City Engineer. Hydrology and pre- and post- development hydraulic calculations must be provided to indicate whether additional storm water !i control measures are to be constructed or renovated. The storm drain system may include,but is not i limited to, subsurface storage of peal< stormwater flows (as needed), bioretention basins, vegetated ', swales, and hydrodynamic separators to reduce the amount of runoff from the site and improve ', water quality. The storm drain system sha11 be designed to detain water on-site (e.g., via buried ', pipes, retention systems or other approved systems and improvements) as necessary to avoid an II increase of the one percent flood water surface elevation to the satisfaction of the City Engineer. Any storm water overflows or surface sheeting should be directed away from neighboring private properties and to the public right of way as much as reasonably possible. 15. UNDERGROUND UTILITIES The developer shall comply with the requirements of the Underground Utilities Ordinance No, 331 and other related Ordinances and regulations of the City of Cupertino, and shall coordinate with I affected utility providers for installation of underground utility devices. The developer shall subrnit detailed plans showing utility underground provisions. Said plans shall be subject to prior approval , of the affected Utility provider and the City Engineer. , 16. IMPROVEMENT AGREEMENT ' The project developer shall enter into a development agreement with the City of Cupertino '� providing for payment of fees,including but not limited to checking and inspection fees, storm drain � fees, parl< dedication fees and fees for under grounding of utilities. Said agreement shall be executed � prior to issuance of construction permits Fees: a. Checicing&Inspection Fees: $Per current fee schedule ($2,468.00 or 5%) b. Grading Permit: $Per current fee schedule ($2,217.00 or 5%) ' c. Development Maintenance Deposit: $1,000.00 , d. Storm Drainage Fee: $TBD I � � 4 �i 32 � Draft Resolution EXG20ll-11 June 12,2012 �!i e. Power Cost: ** f. Map Checking Fees: $Per current fee schedule (N/A) � g. Par1c Fees: $Per current fee schedule (N/A) � h. Street Tree By Developer ** Based on the latest effective PG&E rate schedule approved by the PUC Bonds: Faithful Performance Bond: 100% of Off-site and On-site Improvements Labor &Material Bond: 100% of Off-site and On-site Improvement , On-site Grading Bond; 100% of site improvements. I -The fees described above are imposed based upon the current fee schedule adopted by the � City Council. However,the fees imposed herein may be modified at the time of recordation of a final map or issuance of a building permit in the event of said change or changes, the fees changed at that tirne wi11 reflect the then current fee schedule. �I, 17. TRANSFORMERS � II Electrical transformers, telephone vaults and similar above ground equipment enclosures shall be screened with fencing and landscaping or located underground such that said equipment is not visible from public st�eet areas. The transformer shall not be located in the front or side building setbacl<area. 18. BEST MANAGEMENT PRACTICES Utilize Best Management Practices (BMPs), as required by the State Water Resources Control Board, ' for construction activity, which disttxrbs soil. BMP plans shall be included in grading and sheet �'I improvement plans. 19. NPDES CONSTRUCTION GENERAL PERMIT ' When and where it is required by the State Water Resources Control Board (SWRCB), the developer , must obtain a Notice of Intent (NOI) from the SWRCB, which encompasses preparation of a Storm i Water Pollution Prevention Plan (SWPPP),use of construction Bes�Management Practices (BMPs) to I control storm water runoff quality,and BMP inspection and maintenance. , i 18. C.3 REQUIREMENTS ' C.3 regulated improvements are required for al1 projects creating and/or replacing 10,000 S.F. or , more of impervious surface (collectively over the entire project site). The developer shall reserve a I minimum of 4% of developable surface area for the placement of low impact development measures, ' for storm water treatment, on the tentative map, unless an alternative storm water treatment plan, : that satisfies C.3 requirements,is approved by the City Engineer. �I The developer must include the use and maintenance of site design, source control and storm water II treatment Best Management Practices (BMPs), which must be designed per approved numeric sizing criteria. A Storm Water Management Plan, Storm Water Facilities Easement Agreement, Storm Water Facilities Operation and Maintenance Agreement, and certification of ongoing operation and maintenance of treatment BMPs are each required. All storm water management plans are required to obtain certification from a City approved third party reviewer. , 5 , 33 Draft Resolution EXG2011-11 June 12,2012 --------------------------------------------------------------------------- --------------------------------------------------------------------------- 19. EROSION CONTROL PLAN The developer must provide an approved erosion control plan by a Registered Civil Engineer. This plan should include all erosion control measures used to retain materials on site. Erosion control notes shall be stated on the plans. 20. WORI<SCHEDULE Every 6 months, the developer shall submit a work schedule to the City to show the timetable for all � grading/erosion contiol work in conjunction with this project. � 21. TRAFFIC SIGNS Traffic cont�ol signs shall be placed at locations specified by the City. 22. TRASH ENCLOSURES The trash enclosure plan must be designed to the satisfaction of the Environmental Programs Manager. Clearance by the Public Works Department is needed prior to obtaining a building permit. , 23. REFUSE TRUCK ACCESS ' The developer must obtain clearance from the Environmental Programs Manager in regards to refuse trucic access for the proposed development. 24. STREET TREES , Street trees shall be planted within the Public Right of Way to the satisfaction of the City Engineer and shall be of a type approved by the City in accordance with Ordinance No. 125. , 25. FIRE PROTECTION ! Fire sprinklers shall be installed in any new construction to the approval of the City. 26. SANTA CLARA COUNTY FIRE DEPARTMENT A letter of clearance for the project shall be obtained from the Santa Clara County Fire Department prior to issuance of building permits. � 27. FIRE HYDRANT Fire hydrants shall be located as required by the City and Santa Clara County Fire Department as needed. 28. SAN TOSE WATER COMPANY CLEARANCE Provide San Jose Water Company approval before issuance of a building permit approval. 29. DEDICATION OF WATERLINES The developer shall dedicate to the City all waterlines and appurtenances installed to City Standards , and shall reach an agreement with San Jose Water Company for water service to the subject development. 30. SANITARY DISTRICT A letter of clearance for the project shall be obtained from the Cupertino Sanitary District prior to ' issuance of building permits. �I 31. UTILITY EASEMENTS Clearance approvals frorn the agencies with easements on the property (including PG&E,PacBe11, ' and California Water Company, and/or equivalent agencies)will be required prior to issuance of building permits. ', � 6 34 Draft Resolution EXG2011-11 June 12,2012 --------------------------------------------------------------------------- --------------------------------------------------------------------------- PASSED AND ADOPTED this 12th day of June 2012, at a Regular Meeting of the Planning Cornnussion of the City of Cupertino by the following roll call vote: AYES: COMMISSIONERS: NOES: COMMISSIONERS: ABSTAIN: COMMISSIONERS: ABSENT; COMMISSIONERS: ATTEST: APPROVED: Aarti Shrivastava, Director Marty Miller, Chair � Community Developrnent Department Planning Commission �I I I � I I i I � G:�Plnntting�PDREPORT�RES�EXG2011-11��es.doc I � �� 7 35 TR-2012-19 II CITY OF CUPERTINO I 10300 Torre Avenue �I Cupertino,California 95014 �� DRAFT RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF CUPERTINO �II APPROVING THE REMOVAL AND REPLACEMENT OF TWO PROTECTED TREES: A � 20"DIAMETER,TWO-TRUNKED AND A 28" DIAMETER,THREE-TRUNKED COAST LIVE OAI<S IN ' CONJUNCTION WITH THE DEVELOPMENT OF A SINGLE FAMILY HILLSIDE RESIDENCE AT j 21740 RAINBOW DRIVE (APN: 366-03-063) 'i � SECTION I: PROTECT DESCRIPTION I� I Application No,: TR-2012-19 I Applicant; Barre Barnes I� Property Owner: Holiday Drive,LLC Location: 21740 Rainbow Drive (APN: 366-03-063) i I SECTION II: FINDINGS FOR TREE REMOVAL '�, WHEREAS, the Planning Colnmission of the City of Cupertino received an application for t�ee removal, I�� as described in Section I of this Resolution; and I � � WHEREAS, the necessary public notices have been given in accordance with the Procedural Ordinance ' ' of the City of Cupertino, and the Planning Coinmission has held at least one public hearing on this matter; and I� i WHEREAS,the Planning Comi�nission finds the following with regard to this application: I, 1. That the location of the hees restricts the economic enjoyment of the property by severely limiting �I the use of property in a manner not typically experienced by owners of similarly zoned and situated ' property, and the applicant has demonstrated to the satisfaction of the approval authority that there !, are no reasonable alternatives to preserve the tree(s). !� NOW,THEREFORE, BE IT RESOLVED: I�� That after careful consideration of the rnaps, facts, exhibits, testimony and other evidence submitted in this matter, subject to the conditions which are enumerated in this Resolution beginning on page 2 � thereof,: � The application for a Tree Removal Permit, Application no. TR-2012-19, is hereby approved, and that the subconclusions upon which the findings and conditions specified in this Resolution are based and ' contained in the Public Hearing record concerning Application no. TR-2012-19 as set forth in the Minutes of Planning Coinmission Meeting of June 12, 2012, and are incorporated by reference as though fully set , forth herein. � SECTION III; CONDITIONS ADMINISTERED BY THE COMMUNITY DEVELOPMENT DEPT. ' � i � 1. APPROVED EXHIBITS '�, Approval is based on the arborist report titled: "Evaluation of the Existing Trees at 21740 Rainbow '' Drive, Cupertino, California" dated November 17, 2011, consisting of 6 pages, prepared by Michael L. Bench,Consulting Arborist, except as may be arnended by conditions in this resolution. � 36 Draft Resolution TR-2012-19 June 12,2012 i i 2. CONCURRENT APPROVAL CONDITIONS The conditions of approval contained in file nos. EXG2011-11 and V-2011-03 shall be applicable to this approvaL 3. APPROVED TREE REMOVALS%REQUIRED TREE REPLACEMENTS The applicant has approval to remove tree #7 and #8 identified in the Michael L. Bench arborist report described in Condition #1 and further identified as a 28" diameter three-t�unlced and a 20" diameter two-trunl<ed Coast Live Oaks. Applicant shall be required to plant Coast Live Oal< I replacements in and around the property in accordance with the City's Protected Trees Ordinance. The required replacement trees shall be planted prior to final occupancy of the project associated with file no. EXC-2011-11 and V-2011-03. 4. TREE PROTECTION Prior to building permit issuance, the tree protection measures contained in the Michael L. Bench Arborist Report described in Condition #1, sha11 be implemented as deemed appropriate by the Director of Cornrnunity Development for the trees to be retained. The tree protection rneasures shall � be placed in the construction plan set. A report ascertaining the good health of the trees rnentioned above shall be provided prior to issuance of final occupancy. 5. NOTICE OF FEES DEDICATIONS RESERVATIONS OR OTHER EXACTIONS The Conditions of Project Approval set forth herein may include certain fees, dedication requirements, reservation requirements, and other exactions. Pursuant to Government Code Section 66020(d) (1),these Conditions constittxte written notice of a statement of the amount of such fees, and ��, a description of the dedications, reservations, and other exactions. You are hereby further notified ', that the 90-day approval period in which you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code Section 66020(a), has begun. If you fail to file a �' . . . . . protest within this 90-day period complying with all of the requirements of Section 66020, you will be legally barred from later challenging such exactions. I i 6. PERMIT EXPIRATION ; The subject tree removal permit approval shall expire two (2) years from the date of approval if not i used. ; PASSED AND ADOPTED this 12th day of June 2012, at a Regular Meeting of the Planning Cornnlission of the City of Cupertino,State of California,by the following roll call vote: II AYES: COMMISSIONERS: ' NOES: COMMISSIONERS: I ABSTAIN: COMMISSIONERS: I ABSENT: COMMISSIONERS: 'I � ATTEST: APPROVED: � �I Aarti Shrivastava, Director Marty Miller, Chair I Community Development Planning Corrunission ; G:�Plnnning�PDREPORT�RES�2012�TR-2012-19 res.doc � ( I � I . 37 ' V-2011-03 CITY OF CUPERTINO 10300 Torre Avenue Cupertino, California 95014 DRAFT RESOLUTION (DENIAL) OF THE PLANNING COMMISSION OF THE CITY OF CUPERTINO DENYING A VARIANCE TO ALLOW AN ATTACHED, FIRST-STORY DECK MORE THAN 18 �, INCHES ABOVE GRADE TO BE SETBACI<ZERO FEET FROM THE SIDE PROPERTY LINE WHERE 10 I FEET IS REQUIRED AT 21740 RAINBOW DRIVE (APN 366-03-063) � SECTION I: PROTECT DESCRIPTION Application No.: V-2011-03 Applicant: Barre Barnes (for Holiday Drive,LLC) Location: 21740 Rainbow Drive I� SECTION II: FINDINGS ' � WHEREAS,the Planning Coininission of the City of Cupertino received an application for a Variance, as 'I described on Section I. of this Resolution; and I � �i WHEREAS, the necessary notices have been given in accordance with the Procedural Ordinance of the '� City of Cupertino, and the Planning Conunission has held one or more Public Hearings on this matter; 'i and WHEREAS, the Planning Coininission finds that the applicant lias not met the burden of proof required ' to support this application, and has not met all of the following findings in order to grant the variance: ' 1) There are special circumstances applicable to the property that do not apply generally to property in the same dist�ict. The development of the subject 1.6 acre parcel is severely restricted by the shape of the lot, the location of the road, the preponderance of steep slopes and the presence of a 75-foot wide PG&E ', easement which bisects the property. Approximately 4,100 square feet of the lot area or 5.9% of the lot is I suitable for residential development. I 2) The special circurnstances applicable to the property deprive the property of privileges enjoyed by I� other property in the vicinity and under identical zoning classification. The RHS Zoning Ordinance allows property owners to have a maximum flat yard area of 2,500 square feet, Due to site constraints, �, the proposed decl< is the flat yard area and amounts to about 759 square feet with the variance request. ' Without the variance, the deck must be setback 10 feet from the property line, which reduces the decic by 375 square feet, leaving 384 square feet of decl< area. Except for a srnall area in the front yard, the deck represents the only flat yard area on this property, 3) The issuance of the variance will not constitute a grant of special privileges inconsistent with the ,! limitations upon other properties in the vicinity and zoning in which such property is situated. The , granting of the variance will allow the property owner to provide a reasonably sized decl</flat yard area that is not excessive compared to what surrounding RHS properties may develop. 4) The variance is not being issued for the purpose of allowing a use that is not otherwise expressly authorized by the zone regulation governing the parcel of the property. The decl< use is allowed in the RHS zoning district. I � 38 Resolution No. V-2011-03 June 12,2012 5) The granting of the application will be detrirnental or injurious to property or improvements in the vicinity and will be detrimental to the public health, safety, and general welfare, or convenience, and to I secure the purpose of the title. The property is located in the Wildland Urban Interface Fire Area and the I decl< variance does not provide a defensible fire safety space between the st�uctures and wildland areas � of the Midpeninsula Open Space District. Granting the variance would not be consistent with the i Residential Hillside zoning requirernent to site buildings and driveways as far as feasible from the � abutting public open space lands. � NOW,THEREFORE,BE IT RESOLVED: That after careful consideration of maps, facts, exhibits, testimony and other evidence submitted in this matter, the application for variance is hereby denied by the Planning Coininission of the City of Cupertino. That the subconclusions upon which the findings and conditions specified in this Resolution are based and contained in the Public Hearing record concerning Application V-2011-03 as set forth in the Minutes of the Planning Comrnission Meeting of June 12, 2012 and are incorporated by reference though fully set forth herein. PASSED AND ADOPTED this 12th day of June 2012, at a Regular Meeting of the Planning Col7unission of the City of Cupertino by the following roll ca11 vote: AYES: COMMISSIONERS: NOES: COMMISSIONERS: ABSTAIN: COMMISSIONERS: � ABSENT: COMMISSIONERS: i ATTEST: APPROVED: ' i ;� Aarti Shrivastava, Director Marty Miller,Chair ', Community Development Department Planning Colnrnission I g/planning/pdreport/res/2011/V-2071-03res.doc ', i i i i i i 39 I � �.cY�l`( �17; 1 i�; ��l.� I;�::, ��J�.� , �Si�'c f2-l�(i �G��i._L_/_i i%�(l%(� s..} �,{f�",}�� (� . .�--- ----------�----------------- -- r=-� j—i i��.�l�.'':.� �f.:, � ��� V�' ,,y`�_.� •.� ;,;• t:- � October 18, 2011 TREE REPORT FOR NEW CONSTRUCTION-21740 RAINBOW DRIVE. CUPERTINO.CA � This report was prepared at the request of Barre Barnes. My assignment was to look at the effects of the proposed new house construction on the existing tree population on the lot of i i 21740 Rainbow Drive, Cupertino. The house location is far from all existing trees except for two trees on the lot. A 2 stem 20 inch �,I diameter Coast Live Oak (Quercus agrifolia) and a 3 stem 28 inch diameter Coast Live Oak.The , remaining trees are protected from construction activity by either the distance they are from '� the proposed house and/or the slope of the terrain. Hence only the two Coast Live Oaks mentioned are addressed in this report. � The 2 Stem 20 inch Coast Live Oak is inside the footprint of the existing house. It has a heavy lean and an open cavity at the base of the trunk from an old stem that was either removed or failed earlier in its life. While the house footprint requires the removal of this Coast Live Oak I woutd not suggest trying to tuck a house beneath the canopy of this tree due to its heavy lean and decay at the base of the tree. I recommend the tree be removed and a new tree be replanted to replace it. 2 stem 20 inch Coast Live Oak with heavy lean �� - -� � :; t� .o-� �� - � � _ �'� ':�; ;,, ; �`4; �.. �.�� �:- ,�k;;.<< . . .f-y � `'�� �, �' S� "- q,� {�' „x � � � 4 � � � j� �c ` � J ��r� ,, �'v .. ..' _ �?_' \�€ _.. _ !"I � � +;� ���Y' .i'� .v. h `.� t I � �. .f .�� . . . I ��'' . �� `�� � �i--.. _.� � WWW.�IleSI17(��P@BCO��,r��y�oj K��i' � :�3��uE �2'�p r ' . , � i .._ �,� 40� Y�:i ���i (=� j� P.O. Box 399•�t�te�t,�.� Paa�k, G�4 • 99026 C� iir ..'w ���) �ii -�-- �'� �, `V k\� I w. �U ' �`ii�.��,�� I 2 Stem 20 inch Coast live Oak- Cavity at base of tree _ �� •r.: � ils�� .;� a�� - - �s ,y �r � �,` �T������� �' i� �i.- � - �+�' .�'- i , "s� 's.�• - .s. ,<�' ". !f '�1:� y�,. � ' ,'�;,_� , - "�'�`?�� ,�'`'�t` � �1 Y r _ � �q , �,' .-f .i'��, _ : _ �',: ��. §���� � I T ' X. � 4' � - �'i�, ' r���'1���`' t.� - ,:. �;?�, ? • !�� � �E,'r ,,,,,:. �'.� �,�, � +�. ;.x=�,��� �i � � �,�i.` .�s "�' ." �' }'. " '���'. `' . . � _ ��.��.� 4 a� �'�f" ��:�� k°�'..°,� �: �� �,•�;� �� , - '�;' �'� � 1y ' r�', �, ,yt; �;,, .[ `dy�� �'�`�y�-,��'�6 �� ~-��1 .ta_�N�y� l� �. ��. - �, '� •�l.,F,�„� _i-�iw�� �f� .� k.- q• .;*�.`.�, f" j, ` S►t E '4 '� �y �� �' a�ys � a"'�' *•�s+�F'�d� , s� .i �:)� � '►�`�.�fa�A e��'°��I����� ��j, �* �f y _ _.� ..�.`'.,.� °a� ..'�. �-. e.�!'f� J!�_ w9y . `�� _ ��C� The 3 stem 28 inch diameter Coast Live Oak is approximately 11 feet from the basement. While I this is very close to the base of this oak 1 suggest exploring the option of retaining this tree. This � could be ascertained by an exploration excavation to determine the location and size of roots 'I or by having the project Arborist on site during the excavation of the basement to cut clean i roots as required. Exposed roots should be cut clean, wrapped with burlap and watered down daily to prevent drying. Due to the lean of the tree a combination of selective pruning, to reduce the heavy weight on the leaning side and installing tree props and cabies could be used to help stabilize the tree. The Project Arborist will need to monitor this Coast Live Oak during the construction process on a 2 weekly schedule and make recommendations as needed. After the completion of the construction I recommend the inspections continue on a 3 month interval for 2 years to determine tree health. � .{� �.>s� ��..,��i? ?nAl`: r r�� !\, '�ii i�t;' :( � ;`?� t��4a� uJL'ii�,$�1��_,�-;�"ud.��j��YGf���v�Y��(>l�`IHt���i.,�1`JY�' ��������,., !9J �' __ ._ �l`_ . ,.— , . , . � . , e ..__ � _._ 41 ruj � � li z�;,; !_=, I 1'.O. BD,ti 3.99 •iLte;L�O �'�+/il::, c r`r •9¢026 � '6 U��.�`' __ _--_— _ _ —_ —____— . I _,.I.o I I� 1li_l�_�` � � � l I Should ou have any questions please do not hesitate to contact me directly on 650-575-8218. Y � Prepared by, � � _ j , � j� % �_ Chris Regan I.S.A Certified Arborist WE-6897A �a� , www.theshadytreecomp�����E�,�a,,a r �,y�rr,�� ��,d°? __ i=_�;<<,.. � �� ��� �-; ,. . _ 42 . �/ � � / � / � � I ` � � ' � � \���` `. / � a/ ` I , I � � � � / �� / ' <` � � � � f / I 1 , � � ` � ` l 1 � , _ � ` , O / � / l � 1 �' ` 1 � � � � � ���° � � � ' � � �e ` `� / �� / , � i � ` � — -� � / , L ,o��PVC� \ � _ � \ / � � / � ` \ ����U� � �� \ � ` � � � � � � � � � � ' oF �c — � - � ` � � \ � i.p�, �: � � � � � > << � � ,.. _ � � �v �� ` � � � \� � \ \ y�� � � \ � � � .� ` � 1 � � � � _ _ I � — i �� � � ,��Q �\ � //� �\� � \� � - �� � �� � \ Oy �- � �,o�.Q � �_ -- -- � V \ \ _� �_ ,..-- f c � � �- - � 1 _ _ — — � _, /i , , ` � I , JJ — ., � � � / ��' �_% � , � � \ .! �' — �-- —" " �r'J. \ �- _` � �_ /��"�N � ��r � v _ —' '"' 9 � — "'� �'— � d L .� . � -- ---- � - S9g—I — -- ; --- � .-- — ; -_ �� � � _ � -- � � _ •519 -. r — ^ / — �I / — � � — � � ^ X ' � / j •-- -- � / i , � ., , � �, ,- i � _ _. -- �� --._,=— 089�_�;� � i / i �- '- � . — Lg �, � � � � � � �_�— � — i, Q `'� i � � /� _._ — _— --- — — i ��+ � � � .� � � j/�/ �.�._- . — — � _ � ' I ��--s'�- — — -' �f- ��� -'� — c � � — � '- — -' „� �% -- - - ��- � .589 � � ��� �f � � �/'r— � �// i�"� � -_._ ��l9 j // i /--�---..��i� � � � - -- — �. � — — ]-- � / / / �V� '� � -- / / � � � .� '� � — 1 � �069 - � � i i i � � � _._. .089 �� � � � �� � s� �- --- ` � _ --- — — — _..� . _ � � ____ ---�-� � � i i i � � �� ._._ __ ___ � - - _._. _- -. �� � i� � � � � ` �<. - - - -_ - - - __ 589 ^ � � � � � � � 9 - — — -' f = f �� � � �/ -�i - -- = _ S� _ � r.. � f- / j ''' � — — — t ~ 1 _ —. ' � � � � / � � — — -` -- '— � �� ' , , � -�" � ` - �` — — ,_ � r i 43 21740 Rainbow Drive ; Cupertino, California Evaluation of The Existing'I'rees at � 217401Zainbow Drive � Cupertino, California Assignment ' I was asked by Colin Jung,Planner for City of Cupertino, to provide a peer review concerning the existing trees located at 21740 Rainbow Drive, Cupertino, California. ' The plans provided for this evaluation are reduced copies of the Site Plan, Topography Plan, Elevation and Floor Plans, including a Basement Plan,prepared by an undisclosed � professional, Sheets A00, A01, A02, A03, A04, A05,A06, A07, A08, and A09, dated October 25, 201 l. , Observations For clarity and efficiency of discussion, I have numbered the existing Trees# 1-8 on the ' Site Plan,which is included in the attachments. These trees are classified as follows: Tree# 1 —Coast live oak(Quercus agrifolia) 18"trunk diameter in Excellent Condition. Tree#2—Coast live oak(Q. agrifolia)— 12"(x2)trunk diameter in Fair Condition. , Tree# 3 —Coast live oak(Q. agrifolia)— 14"trunk diameter in Good Condition. �i Tree#4—Toyon(Heteromeles arbutifolia)—considered a large shrub. Tree# 5 —Coast live oak(Q. agrifolia)—24"trunk diameter—in Good Condition. ' Tree# 6—Valley oak(Quercus lobata)— 10"trunk diameter—in Excellent Condition. Tree # 7—Coast live oak(Q. agrifolia)—28" (x3)trunk diameter—in Fair to Poor � Condition. ' Tree# 8 —Coast live oak(Q. agrifolia)—20"(x2)trunk diameter—in Poor Condition. ', Tree #4 is shown on plan as a mult-stem tree. It is a Toyon(also called Christmas berry) �I is generally regarded as a large shrub. I have listed it only to state that I consider it a shrub in this case, because its stems are all small, approximately 2 inches in diameter. This specimen is in poor condition, nevertlieless. Tree# 6 was not shown on the plans. However, it is a healthy Valley oak(Q. lobata), which meets the size requirement to be protected. Peer Revieva Commentary The arborist report provides detailed information about Trees # 7 and �. He describes the coast live oak(Quercus agrifolia) Tree# 8 as a poor specimen, because it has a large ' cavity at grade and it leans significantly. Tree# 8 is in conflict with the proposed foundation and would have no chance of survival. Tree# � is recommended for removal. ' I agree with this assessment of Tree# 8. , The arborist suggests that Tree# 7 be preserved provided sufficient root mass could be preserved by careful excavation, possibly using an air spade. Although not stated, it ' appears that the assumption is that Tree#�''is a relatively safe specimen. � �I � Prepared by Michael L. Bench, Consulting Arborist November 17, 2011 1 �I 44 21740 Rainbow Drive '�� - Cupertino, California l I disagree with this assessment for two reasons: 1. Although the basement is proposed approximately 11 feet from the trunk of Tree �,the actual soil cut would be considerably closer to the trunk of Tree#�;°� 'I pbssibly -6 feet from the trunk. In this case,the root damage would likely render !, Tree #�,$�stable. Should the soil cut be 11 feet from the trunk, as described by ', the arborist, it would be very unlikely that Tree#�°would not suffer severe root ', damage. �� ' 2. Tree# 7 is a"stump sprout" specimen. This means the original central leader was destroyed many years ago (possibly by fire), but the tree had sufficient energy to produce new leaders from the stump at soil grade. Unfortunately the resulting growth is poorly attached to the stump. Considering the size of the 3 stems, approximately 28 inches in diameter of each of the 3 stems, it may be difficult to perceive that this tree has weak attachments (to the stump) and, therefore,prone to failure. I have seen many coast live oak trees in this condition completely fall apart especially after they are mature and have extended limbs with heavy end weights, as does this specimen. It may be useful to note that there is a cavity at the center of this tree between the 3 stems. This is decay of the original damaged ', central leader. I would consider Tree# 7 a Hazardous tree should this site be ', developed as proposed. , The arborist states that the other trees are located such that they would not be at risk by , the proposed design. The Topographic Plan appears to confirm this reasoning. I disagree with this assessment, for the following reasons: 1. It appears that excavation equipment would be required to excavate the large basement proposed. Equipment on tracks would have no difficulty traveling into the root zones of the other trees, and in my experience,there is a very good chance this would occur unless protective fencing would be required. 2. The soil cut for the retaining wall would be inside the dripline of Tree# 5. The , soil cut would be 4 or 5 feet closer to the.trunk than the wall itsel£ It would be 'I essential for the face of the soil cut to be a minimum of 15 feet from the trunk of the tree in order to expect Tree # 5 to survive in good condition. 3. Tree # 5 has a 12 inch diameter limb which faces the residence. It appears that the contractor may wish to remove this limb to construct the retaining wall. Research � has shown that limb wounds approximately 8-10 inches in diameter or larger i virtually guarantee a cavity in the future. A cavity of this size often compromises ' the parent stem after several years. In short,the removal of a limb of this size shortens the life span of the tree tremendously. I my opinion,this limb may be reduced, if done properly by proper pruning �tandards, no more than approximately 25%. 4. Landscaping mitigations procedures must be required (See Recommendations# ' 9-13, Page 4 of this text). Otherwise, landscaping may kill the oak trees, despite protection during construction. 5. The protection of Tree# 5 would also protect Tree# 6. Itecomrnendations 1. I recommend that Trees # 7 and 8 be replaced according to city standards should ' � � Prepared by Michael L. Bench, Consulting Arborist November 17, 2011 2 �!, 45 21740 Rainbow Drive Cupertino, California this project proceed. 2. I recommend that Tree Protective Fencing be required for the protection of Trees ' # 1, 2, 3, 5, and 6 during the entire construction period. This fencing must protect a sufficient portion of the root zone to be effective. In most cases, it would be essential to locate the fencing a minimum radius distance of 10 times the trunk diameter in all directions from the trunk. For exam�ple, a tree with a trunk diameter of 15 inches dbh(Diameter at Breast Height= 54 inches above grade) would require that protective fencing be erected 13 feet minimum from the trunk. '', If hardscape (i.e., curbing,paving, etc.) exists inside this 13 foot radius,the ' protective is usually recommended to be erected at the edge of the hardscape ', feature and be located at least 13 feet from the trunk minimum on all other sides. '�, Typically I recommend that tree protective fencing must: '� • Consist of chain link fencing and having a minimum height of 6 feet. , However, in this case, I recommend T-bar posts and Orange Caution Fencing. o Be mounted on steel posts driven approximately 2 feet into the soil. , • Fencing posts must be located a maximum of 10 feet on center. �', • Protective fencing must be installed prior to the arrival of materials, vehicles, i or equipment. !, However, ' • Protective fencing must not be moved, even temporarily, and must remain in place until all construction is completed, unless approved be a certified arborist. 3. I recommend that the soil cut for the retaining wall must be a minimum of 15 feet ' from the trunk of Tree# 5, measured from the nearest side of the trunk. I recommend that the limb on Tree# 5 facing the residence must not be removed ', but may be pruned(according to ISA standards)no more than 25%. I 4. Any pruning must be done by an arborist certified by the ISA(International ' Society of Arboriculture) and according to ISA, Western Chapter Standards, � 199�. � 5. I recommend that Trees # 5 and 6 must be irrigated throughout the entire construction period during the dry months (any month receiving less than 1 inch of rainfall). Irrigate a minimum of 10 gallons for each inch of trunk diameter I every two weeks. A soaker hose or a drip line is preferred for this purpose, but the soaker hose(s)must be located near the dripline (not near the trunk)to be ' effective. ', 6. I recommend that the entire area inside the driplines of Trees# 5 and 6 must be ' mulched to the extent feasible. Mulching consists of a protective material (wood ', chips, gravel)being spread over the root zone inside the dripline. This material must be 4 inches in depth after spreading, which must be done by hand. I prefer course wood chips because it is organic, and degrades naturally over time. Wood ' chips must be 1/4 to 3/4 inch in diameter primarily. 7. Materials must not be stored, stockpiled, dumped, or buried inside the driplines of protected trees. Prepared by Michael L. Bench, Consulting Arborist November 17, 2011 3 ' 46 _ _ _ _ _ _ _ _ _ 21740 Rainbow Drive ' Cupertino, California i 8. Excavated soil must not be piled or dumped, even temporarily, inside the driplines of protected trees. 9. Any pathways or other hardscape inside the driplines of protected trees must be . constructed completely on top of the existing soil grade without excavation. Fill soil may be added to the edge of finished hardscape for a maximum distance of ', approximately 2 feet from the edges to integrate the new hardscape to the natural grade. 10. The sprinkler irrigation must not be designed to strike the trunks of trees. Turf or sprinkler irrigated ground cover must be a distance of 10 times the trunk diameter from the trunks of the existing oak trees. 11. Landscape irrigation trenches must be a minimum distance of 10 times the trunk diameter from the trunks of protected trees. 12. Landscape materials (cobbles, decorative bark, stones, fencing, etc.)must not be installed directly in contact with the bark of trees because of the risk of serious disease infection. 13. The plants that are planted inside the driplines of oak trees must be of species that are compatible with the environmental and cultural requirements of oaks trees. A publication about plants compatible with California native oaks can be obtained from the California Oak Foundation, 1212 Broadway, Suite 810, Oakland 94612. If any of the above procedures cannot be achieved adequately, I recomrnend that a City Arborist be consulted to recommend possible alternative solutions, if any. Respectfully submitted, � Michael L. Bench, Consulting Arborist International Society of Arboriculture Certification#WE 1�97 American Society of Consulting Arborists Member I'� Attachments Site Plan Mark Up ' Assumptions and Limiting Conditions i � � I I Prepared by Michael L. Bench, Consulting Arborist November 17, 2011 4 47 . _ IVlichael I,. Bench - 5 - Consulting Arborist ISA#1897, ASCA (831) 594-5151 Fax (831) 663-0373 7327 Langley Canyon Rd.,Prunedale,CA 93907 Subject: 21740 Rainbow Drive Cupertino, California � !-�ssumptions ancl I.imiting Conditions ' 1. Any description provided to the appraiser/consultant is assumed to be correct.Any titles and ownerships to any property are assumed to be good and marketable.No responsibility is assumed for legal matters in character nor is any opinion rendered as to the quality of any title. 2. It is assumed that any properiy is not in violation of any applicable codes,ordinances, statutes,or other governmental regulations. 3, Care has been taken to obtain information from reliable sources.All data has been verified insofar as reasonably possible.However,the appraiser/consultant can neither guarantee nor be responsible for the accuracy of information provided by others. 4. The appraiser/consultant shall not be required to give testimony or to attend court by reason of this appraisal unless written arrangements are made,including payment of additional fees for services. 5. Loss or removal of any part of this report invalidates the entire appraisal/evaluation. 6. Possession of this report,or any copy thereof,does not imply right of publication or use for any purpose by any person other than to whom this report is addressed without written consent of this ' appraiser/consultant. ' 7. Neither all nor any part of the contents of this report,nor copy thereof, shall be used for any purpose by anyone but the client to whom this report is addressed,without the prior written consent of the appraiser/consultant;nor shall it be conveyed by anyone,including the client,to the ' public through advertizing,public relations,news, sales,or other media,without the written I consent and approval of the author;particularly as to value considerations,identity of the appraiser/consultant to any professional society or institute or to any designation conferred upon by the appraiser/consultant as stated in his/her qualifications. 8. This report and the values expressed herein represent the opinion of the appraiser/consultant. Further,the appraiser/consultant's fee is in no way contingent upon the reporting of a specified ; value nor upon any finding or recommendation reported. ' 9. Sketches,diagrams,graphs,photos,etc.,in this report are intended as visual aides and are not done necessarily to scale and should not be construed as engineering information or specifications. i 10. This report has been made in conformity with generally acceptable appraisaUevaluation/diagnostic ; reporting methods and procedures and is consistent with practices recommended by the International Society of Arboriculture and the American Society of Consulting Arborists. 1 L The appraiser/consultant takes no responsibility for any defects in any tree's structure. No tree described in this report/evaluation has been climbed,unless otherwise stated,and,as such, i structural defects that could only have been discovered by climbing are not reported. Likewise,a ' root collar inspection,consisting of excavation of soil around the tree for the purpose of ' uncovering major root defects/weaknesses, has not been performed,unless otherwise stated. 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'a � f} ai�� . eis.r� e t I t � .. � f � �°°-�,.,� ' S :� �r �a`1�i ik�I � � � ���� s �� � �`{,� t ��r�a�;�t P F'� ''� ..t�� .� � .4��Ji r ' ,��� �,t` . r�...� p �' K �� �. � F t �` �� � �'t #1�� te� `�1� �7��t .?'��.€ ,� #' -,V r,�1' ��! i '� t re -.�'` y��,r� #t` rC� r t�. �° � � a '� t .° '°sr , ,. •,. , ���i � xk.P`r r a ...6�a' .t``�r.� �.r r.� � ` � '1` r�� ,.1��, -� g e'z�t d1 y�r .. �� �'. � �� �� ��. . . . , � 49, , : � . � `� � ` � ����� i ,i � . ��������'��a� ������������� Proposed Residential Development 21740 Rainbow Drive � Cupertino, California Prepar�d f�r: Holiday Drive ,LLC c/o Mr. �arre Barnes, Presidenfi 2175 de la Cruz Boulevard, Unit C , Santa Clara, Ca�lifornia 95050 I�I Dated: October 15, 2011 ��� Job 2410.02.00 I i ��� Earth Investigations Consultant� P.O. �ox 795 Pacifica, California 94044 Phone 650-557-0262 Fax 650�a57-0264 earthinve�tigations a�comcast.net � � I 50 _ i�, ' ' � S�1 1 l� S , , , ,� October 15, 201� ; Job 24�10.02.00 Holiday Drive, LLC c/o Mr. �arre �arnes, President 2175 de la Cruz �oulevard, lJnit C Santa Clara, California 95050 . 1' C � L. 9�JV�� Tt °f IO Proposed Residential �e�elopment 21740 Rainbo►�v Drive Cupertino, California - Dear IVIr. �arnes: INTRODl1CT10t� Location and �roposed Proiect - �ursuant to your authorization, we have cornpleted the referenced project, located in Cup�rtino California (Plate 1, �/icinity nliap). We under�tand that you propose fio con�truc� a 2-story re�idence with atfach�d garage on a vacant p�rcel located at the southem end of Rainbow Drive (Plate 2, Site Plan). T'he prvposed project will entail modera#e grading to establish #he b�ilding pad and driveway - access frorn the �treet. VVe anticipate the pro}ect �rill entail moderate grading and retaining walls. T'here is a p�rceived debri� flo�uu hazard that will be taken info consideration ir� laying. oufi the site retain�ng wal6s proposed around the perimeter of fihe ho�se pad. Si�e drainage vvill be dir�cted fic� the existing storm drain on the vve�t side of the house and, in t�arn, to a culvert that discharges into ' an unst��le gull� on the dov�n�lope side o� th� str�et that drain� to Regnart Creek approximatel}r 600 fee# north�nr�st �f th� site. Photo� � through 4 provide various vie�vs �f the si�e area features de�cribed in �his rep�rt. Purpo�e and Scope of Services The purpo�e of thi� !Il!/�S�19�t1011 �a� �o characterize the geologi� and geotechni I aspe�t� o# th►e prop� that would influence de�ign, �onstruction and performance of the proposed sifie developrrae�t, arrd t� provide geotechnical recomrr�end��ions for use in design by the proje�t architect and engineer, and in construction b�th� contracfior and sub n�ra�tor�. e�log�sts �n in�ers ' P.O. �ox 79b Pacific�, �A 94049 (��0) 55'7-0262 �aat(650) 557-02b4 . Mr. Barnes October 15, 2011 Job 241�.02.00 Page 2 Findings, conclusions �nd recornme�dations in fihis report are ba�ed upon the following scope ofi services: • Revie�v of pertinent geological and geatechnical reports and rr�a�s on fiile in our ��fic�. Appendix A con�ains pr�vious si�e explor�tions by JCP - (1989, �J91) and by G�of�rensics, Inc. �1996). Plate 3 contain� an excerpt co�ering the site area of � regional geologic rnap (Sarg and nAcLaughlin, 1975). Plate 4 contains �n �xcerpt couering the site area of the California Geological Sur°vey Seismic Hazard Map (2002). � � Engineering geologic mapping onto #he projec� �opographic �it� plan prepared by Giuliani & Kull, Inc. (Plate 2). � • Drilling of 2 borings in the proposed dev�lopment area v,rith a track- mounted, flight auger. The borings were supervised, logged �nd �ampled by our field engineer on September 1fi, 2011. The approximate I�cations o�the borings are depicted �n Pla#e 2. Plates 5 and 6 contain the Logs ofi �orings, and Plates 7 and 8 provide descri�tions of the terms and symbols in the logs. Relatively undisturbed earth material encountered in the auger borings v��ere retrieved at selected intervals with modified Califiornia and SPT split-spoon �ampler, The number ofi blovvs to drive the respective samplers �8 inches vuith a 14�0-pound harr�rner free-falling 30 inches from � a cathead and rope arrangement �r�s recorded on the logs at the respective sample depth. The blo�r co�an#s tabulated on the I�gs �re SPT value� (multiplied the field values by 0.�). - � Pertinent laboratory soil index fiesting on selected samples from the borings. Tests included moisture content, dry densi�y, �tterberg limits, and percent af soil particle� passing the 200 �ie�re. fZesult� of the moisture cont�nt and dry densi� tests are tabulated on the boring logs at the re�pectiv� �ample depths. Atterberg lirnit test r�su6ts and the sieve analy�is are contairred on Plate 9. � Geotechnical analysis of the data and pr�par�tion of recommendations. A representative cross section through the propos�d buolding sire is depicted �n Plate 10, Generalized Gross Sect6on A-A'. • Report prepara�ion and submitt�l. I , Ea�h In����i�at�52� Co�s����m�s Mr. Barnes Octaber 15; 2011 Job 2410.02.00 Page 3 Previou� 1/Vark �eoforensics, Inc. (1996) perfarrned � geotechnical investigation for a 2-lot, residential subdivision, and extensian of Rainbow Drive wesf of an existing residential subdivision. The location of the propo�ed sit� development v+r�s , �ppraximately th� sarne �s for this inrrestigation (Plate 2). They determined from i maps and photogeology that the site lies at the southeastern reach ofi the [Vlonte ' Visfia fault zor�e ur�derlain by folded and faulted San�a Clara fiormation sandstone � and claystone. IVo active faults were found across the site. The bowl-shaped headwaters of an ephemeral drainage char�nel, of which the site occupies �he easterly flank, was charaeterized as a debris flouv source area. The slope wash underlying the axial par� the site area contained multiple, generally thin, sfiff to hard, silty�clay, debris flow deposits. Their's and previous (JCP, 1989, 1991) test pit exposures (Appendix �4) confirmed the soil profile and that the adjoining hillside terrain vvas underlain by weakly consolidated Santa Clara formation (sandstone and claystone} as depicted on regional scale geologic maps (Sorg and IVIcLaughlin, 1975, Brabb, 1993). Mulfiple, thin la�ers ofi stifF to hard, silty clay soils profile underlying the axia! par� of the drainage, where �he proposed house is sited, �ere interpreted to be at slope �ash containir�g multiple, thin layers ofi debris �lo� sedirr�ent. They concluded the proposed house developmenfi site feasi�le provided it is protected on th� southern side from debris floe�r inundation by a minimum 4-foot high, deflection b�rm, and tha� s�turation of the slope v�ash deposits for a distanc� of at least 30 feet be mi�tigated by installation of a 12-foot deep, axial subdrain. G�OL.OG1� SE�TT°'I�°G Topo�raphv and Dr�ina�e ; � � The site lies in dissected, fo�thills ferrane on th� ea�terly flank of the southern Sanfia Cruz 1lnountains at an approximate elevation of 640 feei above mean sea level. It occ�pies the upper reach of a den�e brush and tree cover�d, relatively smooth-surfac�d, norfhwest trending epherri�r�l �h�nnel cufi into �h� rnod�rafiely steep to ste�ep northeast �rending, dens�ly vegetat�d ridge flank that drains te� Regnarfi Creek approxirnately 600 fe�t to the northwest (Plate 1). a I�ve��n �ti��� �n���t�n�s . Mr. Barn�s October 15, 2011 Job 2410.02.00 Page 4 Structure and Rocks The site is on the northeastern margin of the northwest trending, appro�ir�a�ely 60-mile long, Sargent-��rrocal fault zone, which is defined on the eastern sode by f�o, subparallel fault strand� fihat describe the Monte Vista fiault zone (Plafie 1). According to mapping by Sorg and I�cLaughlin (1975), the potentially ac�ive Monte Vista fault zone extends northvvestvvard from Los Gatos to Los Altos Fiitls where it merges with a zone of imbricafie thrust faults mapped by Dibblee (1966). l"he pot�ntially active �errocal fault zone is mapped approximately 1 mile ' southvvest of the sifie and the trace of the active �argent fault is mapped approximafiely� 20 mile� ta the south. Hay and others (1980) interpret the Sargent-�errocal fault zone as a developing pattern resulting from shear-couple tectonic deformation in northern California exhibiting �trike-, r�verse-, and ablique-slip. Although fhere has be�n a paucifiy of historic seismicity associated by the fault zone (Sarg and BVIcLaughlin, 1975), movement on faults within the zone are believed to be related to active ir�teracfiion along the North American- Pacific plate boundary, vvhich is defned by the N40°W trending strike-slip San Andreas fault. The San Andreas fault, mapped approximately 3 miles southwest of the site, is considered the potential seismic �ource that would produce during. a nearby major earthquake a�d very strong to violent sit� ground shaking in this region (Petersen and others, 1999). Rocks wifihin the Sargent-Berrocal fiaulfi zone vary greatly. Predominantly uplifted and �heared, upper Cr�taceous to upper Jura�sic Franci�can rocks, consisfiing of melange, sandst�n�, greenstone, Calera lime�tone an�l chert, ar� found on the uplifted, sou�hwe�t side. Tightly fiolded rocks betvveen the Berroc�l fault and across the il�onte Visfia fault cansist of thinly laminated, brittle marine shale ar�d ', siltstone, calcareous rriudstone and siltstone of the middle IViiocene IVionterey ' formation, unnamed, upper 11�io�ene sands�one and shale, and fiolded, poorly to � modera��ly lithifi�d, fluvial pebble to boulder conglomerate, fine- to coarse- '�I grained, poor{y-sorted sandstone, and lacustrine siltsfione and clayey mudstone , of the middle i'liocene fo lower Pl�istocene Santa Clara formation (Dibblee, ! 1966; Sorg and Il�cl�aughlin, 1975). Along the e�stern rriargin o� fhe fault zon� there is undeformed, u�per to middle Pleistocene alluvium consisting of ' unconsolidated, poorly sorted, subangular to �:�ber��ar���d bould�r�, ��bbles and ' gravel and unlithified sil�y sand, silfi and clay (I'late 1). �, I Locally, the site area mapped Sorg and IVIcLaughlin (Plate 3) lies on the I �outh�+re�t limb of a narthwest trending anticline underlay by the unnam�d '� �andstone and Santa Clara formation. The orienta�ion of th� epherri�ral channel I is apparentty controlled by the structural contact be�veen these b�drock unifi�. �� I � �! Ea I�a�e�t� ���o C��s�nl��nt� ' Mr. �arnes October 15, 2011 Job 2410.02.00 Page 5 Landslides Acfive bedr��k land�lides have not been rr�apped in the sit� area. VVe annofiated Plate 3 fio r�flect an arcuate, bowl-shaped hollow approximately 200 feefi upstr�am of the proposed building si�e. It is in�erpr�ted to repre�en� � r�latively large debris filovv source area that has developed ov�r geologic time. : Downstream from the holl�v�, the sife occupies the main firack along wvhich debri� fl�w mat�rial has been �onfined in the middle and distal reach o� the narrower ephemeral channel �o the d�positional fan a�the confluenc� with Regnart Greek. There was ob�erved edidence reporfied by Geoforensics, Inc. (1996) of recent debris flow deposition near the sou�hern margin of fihe proposed development area (Plate 2). Since their investigation, a n�rrovv, 2- 3-foot high, earthen runof� diversion berm has been constructed on or just south of the southern property � line to direcfi runoff and probably debris to the street (Photo 4), although there was no observed evidence of depositian since the b�rm was cons�ructeca. Plate �4 indicates that the proposed building site lies writhin an area perceived to have widespread potenfiial for seismically-induced landsliding. The proposed building site i� iocated in #he gentle slopi�g are� of the ephemeral drainage. Photogeologic ir�terpretation ar�d �ite observatio�s indicate, with the exception of the pofienfiial debris flow hazard associa�ed ��i�h the landslide described abo�e, the proposed development area is not constrained b�+ existing landslides. The bordering spur ridges are intac� ar�d appear relatively resistant to erosion and landslides under the curr�nt physic�l setting. �9T'E CIiA CTERI�°fI�S 5urface �e�tures � The proposed building site is on a genfle north�est�rly sloping surface on the eastern flank of the �phemeral channel that drains she�fi flovv runoff fio the northwes� parf of fihe proposed developrnent area �rvhere there are exis�ing storrn drainage facilities associated e�ith the late 1990's vvestern extensi�n of Rainbo�nr Drive (Plate 2; Photos 1 through 4}. RunofF from the roadvvay drainage catchment� is conveyed bgr a C�P culvert that discharges dovvnslope of the � roadway ontc� fihe inadequately protected �oil surf�ce. This condi�ion has resulted in gully erosior� and consequent debris sliding of the �djoining channel banks (Plate 2; Photr� 2). °There i� an inta�t, steep spur ridg� bordering the ��st side of the building site. It , is grass coVered �rvith sc��#�r�d, rnature oak, firess. Locally, cobble flvat from near-surfac� conglornerat� i� the Santa �lara forrrmation occurs on th� hill abave � Invest� a��� s onsulta�t� Mr. �arne� flctob�r 15, 2011 Job 2410.02.00 Page 6 the �ite, vvhich confirrns previously reported shallov� depth fio b�d�ock in this area �f the si�� (Appendix �►). There was no evidence e�f in�tability or �ctive erosion on this relativel}� re�istant spur. �outh of the proposed building site, beyond the berm rrientioned earlier and an�o th� adjoining property, the gentle grass and brush covered ground de�cends a feav feet tov�rard th� axial par� �f the eph�meral drainage channe{, vvhich g�nerally coincides with the vves�ward dogleg bend in the roadway. Upstream vf the proposed bui(ding si�e, the hiqside abruptly �teep�ns to as much a� 35 or more degr�es to the ridge cre�t marked by the dense brush covered, arcuate source area scar. Surficial creep af sandy clay calluvial soil m�nfiling the slope of the northeastern 2/3 was evident. Gross instabilifiy was not detect�d in fihis area of the source area scar on aeria( photographs or in the field. Al�hough not evid�n� on aerial photographs, we observe� in the field beneath the dense . brush cover a� estimaied 'i 0 to 15-iaai deep failuie, appareritly in slope-formir°ig Santa Clara mudstone underlying at Eeast a portion of the vvest central part of the source area scar. The locally eeoded bulge at the toe of the la�dslide po�itioned near the foot of the scar is an apparent source for recent debris deposits reported by Geoforensics, Inc. (P(a�� 2). A foot trail and saddl� markir�g the crest of the ridge bordering this segrrlent of the �ource are scar is a su�pected mechanism for directing concen�rated runoff onto the ur�stable�lope. Subsurface Exp(orations � Soil sampl�s from t�nro borings drilled for this inves�igation vvere used in I conjunction vvi�h subsu�face dat� from previous �ite explorations to establish an int�rpre�iv� cross section through the proposed building site {Plates 2, 5-7, and 9; Appendix A). �oring 1, drilled on the west side of the propos�d deveiapment si�e � encauntered approximately � % feet of inedium dens�, maist, silt�r sand, slop� vvash underlain by approxirriately 18 %Z feet of r�noderate plasticity, moist, sti�' to hard, sandy clay vv6th gravel, �lope vuash. The surficial soil was supported by �oft, �anta Clara claystone to the depth drilled �f approxirnately�6 %2 feet: �oring 2, drilled on #he �teep hillside borderin� �h� �asfi side of th� �r�ject area, jusfi downhill of the cobble flo�t encount�red approxirnately 2 fe�t of rnedium der��e, rnoist, c6ayey sand �rith gravel supported by mediurn dense ta d�nse, Santa �lara �onglor�nerate to the depth drilled of 25 �/z feet. Ground water was n�fi en�ounter�d an th� borings. i he soils encountered in the boring� �ere mainly damp. � I II a h In��st�g�����s Coeas�ltant� '' Mr. Barnes October 15, 2011 Job 2410.02.00 Page 7 �I�CU��ION AF�� CONCLUSI�i�S � The results of this investigation indicate that the proposed project is feasible frorn a geologic and geotechnical sfiandpoi�t. The site occupie� the lower�ast flanl� of a northwesterly sloping ephemeral drainage channel tribufiary to Regnart Creek. It is in a seisrnically ��tive region that, in the site area, is underlain by weakly cor►solidated Santa �lara formatian claystone and more resistant conglamerate just v�rest of the contact vvith an unnamed, upper IViiocene sandstone. From this investigation, we judge low the risk for fault rupture across the building site during a future, nAarby rnajor ear�hquake on a nearby active fault within the San Andreas or Sargent-Berrocal fault zones. However, very s�rong to violenfi ground shaking should be anticipated over the projected design life of the project. There is a 23 percent probability of a major earthquake on the San Andreas fault and 31 percent chance on the Hayward fault over the ne� 12 years (VI(orking Group, 2003). Following are projected maximtam magnitude earthquakes for the local potentially active and active nearby fau{ts that during a causative earthqua�e result in strong ground shaking in the site ar�a (California Divi�ion of I�ines and Geology, 199�; P� � E, 1999): FAULT DISTANCE �ROM �ITE {miles) (VIRXiIVIU(1� �P,GNITUDE San Andreas 3 7.9 San Gregorio 20 7.8 Sargent 20 6.8 �er�ocal 1 6.0 Nlonte!/ista A5 6.5 F9ayward (so. segment) 16 7.5 Calaveras (so. segment) 1� 7.3 In our opinion, the risk is I�v�r for �econdary liquefacfiion and/or ground lurching given the coh�sive �urficial deposits and sh�llc��r �fQ�th to bedro�k �nco�antered in site exploration�. Catastrophic or progressive slope failure from ground shaking is expected to be low in the irr�mediate area of fihe house sit� provided the geotechnical grading �nd drainage rec�mmendafiiens are adhered to in design and con�truction. T'her� could be reactivation of the landslide �t the b�se of fihe �ourc� area scar approximafely 200 feet upstrearn from the building sit�. If this vvould occur during � dry period, we expect signifcant mobiliz�tion #oward the site. ,� vvet�+re�ther earfhquake could g�nerate a debris flouv#oward the site, h�w�ver the rnoderat� �nclination of the channel dovvnstream from the foot of th� source area scar and the er�e�terly �I�pe of the building sit� vvould tend �o dir�ct a I ve�t� atn� s Co s��ta�nts Mr. Barnes October 15, 2011 , Job 2410.02.00 Page 8 ', ' ' an debris flow tow�rd the axial part of fhe channel �long the southwest side ofi th� sife, as has occurred in fhe recent past. �ecause we judge moderate to high ; poten�ial for future debris f{ow activi� frorr� the west-central p�rt of the source ' area scar during prolonged �nd int�ns� rainfall over the lifetime of the project withoui in�luence irom �n �arthquake, �nre ha�e recommen�ed th� site be protec�ed by in�fialling a deflection wall alor�g the southern praper�+ wali to direct ; ' an advancir�g debris floen� a�vay from fihe site {Plate 11). Strong earthquake ': shaking can produce ground fissures, hovvever, on the basis �� performance of the steep slope bordering the east side of the building area, we judge a low risk its susceptib�lity for seisrnocally induced bedrock landsliding. However, should ground fissures develop from earthquake shaking, it is imperati�e they be evaluated by a qualified geotechnical consultant for mitigation to avoid erosion and�sedimentation from the thin colluuial �oil r�nantle. An important aspect o� the praposed project design wili �� to establish a comprehensive drainage plan to direct runoff to the storm drainage system. While outside the scope of this investigation, we strongly recomm�nd geotechnical investigation and mitiga�ion ofi erosion and surficial landslide acfivifiy in the gullied channel segment afi the exisfiing storm drain pipe discharge iocation �n the downhill side o�the street. Given the poten�ialiy expansi�e slope wash deposits in the channel and likelihood the building foundation uvil! span fihe soil, bedrock contact, en�e recommend the proposed project structures should be suppor�ed en drilled cast- in-place piers. �a I �r�s�i a�n��s o����t �s ; fV{r. �arnes �ctober 15, 2011 ' Job 2410.02.Q0 Page 9 ', REC�C� ���7A�'I�t�� Seismic D�siqn ' �: The propo�ed structures should be designed for the fal{owing �eismic d�sign criteria derived �rom �he subsurFace exploration dafa and the 20�0 CaBifornia � �uilding Code (CBC): '` " • Sifie Loeation: Latitude = 37.2976; Longitude = 122.0565 . • �ite Soil Class: D • Spectral Response Acceleration �/alues: Ss =2.482; S1 = 0.902 Fa = 1.0; Fv = 1.5 Site Preparation, Gradin� �nd Compacfion The project �ngineer should prepare a detailed grading, drainage and erosion cantrol plan #or this project. Grading should be perFormed in the dry months. Site soil lacking org�nic debris and rock� gr�afier than 6 inches across is an acceptable �ource of ret�ining wall backfill. We do not anticipate structural fll for house pad grading. lf strucfiural fill is required, we recornmend �hat ifi have a pla�ticity index (PI) no greater than 15. We recomrr►end 4hat su�cial soil in area� ofi proposed new slabs (driveway, . - walkways �nd patios) be over-excava�ed t� a rninimurri depth of 12 inches and replaced with non-expansiue imported fll (e.g., Class 2 aggr�gate baserock) that e�ends at least 6 inch�s beyond the slab footprint. Prior to fill placernent, the exposed subsoil, after over-excavation, should be scarified to a minimum d�pth of 8 inches and recompacted to at least 90 percent relative to the maximaam dry densifij (fVIDD) of #he materials as d�#ermir�ed by the P►STIVI D1557 labaratory t�st procedure. It will be nec�ssarry to cut level benches into firm n�tive soil where slopes are greater than 10 degrees. Slopes greater than 10 degrees that will receive engineered fill will require � keyvv�y for lateral support. The key �hould be an equipment width (minirnum 8 f�et) �nd extend at I�a�� 3 feet into stifF native soil. Fill sho�ld be placed in loose 6- to 8-inch fihick liffi�, moisfiure conditioned to near optimum, and compacted to at least 90 percent of the ►riaximurn dry density of the material�. Giv�n the fill �ill be placed in a drainage charane9, it a�rill b� necessary to install a continuous, lonc�itudinal subdrain and at lea�t 2 transverse , subdrai�s, one at th� h��d ofi fihe fill and one in the key. °The ��abdrainage pipe a • It�vest� ati��� Co �ul� a�#s IVIr. Barne� �cfober 15, 2011 Job 24�a.a2.00 Page 10 should be connected to a �olid, �DR 35 or befter PVC pipe to carry �nrafer to autl�t in the storm drainage system. Temporary cuts for dry vveath�r construction sho�ld be inclined no steeper than 1 '/ZFI:1V for a period no greater than �5 dayse Permanent cut slopes sho�ld not - exceed 3H:'I\/. Engineered fill s{apes shauld nofi exceed 2H:1V. Sfi�eper slopes ' should b� supported by engine�red retaining wall�. ' � Utilit� Trenches Vertical trench excavations up to 5 feet deep should be capabfe of standing with minirnal bracing for �hort duration (le�s than 30 days). Hovvever, contractors should be alert to potential instability. Utility trenches should be designed to prevent the fran�portation of water into the foundations, and slabs ar pavement subgrade soil�. Car� should be taken to assure that uncontrolled, concentrated runoff is no� conducted �o�nrard the exisfiing slopes. In particular, where utili�ies cross fioundatians, trenches should be plugged with compacted clayey soil for their full d�pth, and for a distance of at least 5 feet on either side of#he foundations. On-site, inorganic soil may be used as tatility trench backfill. Special cornpaction of trench backfill wrill be necessary under and to ��ithin 3 feet �fi proposed structures, concrete sl�bs, asphalt pavements, and engineered fill. In these areas, backrill should be �onditior�ed to approximately 3 p�rcent above optinnum and placed in horizontal lifts, each not exceeding 4 inche� in loose thickness. ' Each layer should then be compacted fio at least 90 percent I�DD. The top 2 f�et of firench backfi{I ur�der pavemen�s should be nan-expan�ive, granular soil compacfed to at least 90 percent f1�DD. Foundations We recommend applica�ion of drilled, cast-in-p{�ce reinforc�d cancr�t� piers to support structures (house and retaining vualls). Piers sh�uld be af least 16 inches en diameter, and extend at least 12 fieet belovv the ground �urface to derive suppor� in stiff to hard soil �nd/or the underlying, soft bedrock. Acfual depth� should be confirmed by the feld engineer during drilling. As �uch, piers � should be designed for an allowable �kin friction value ofi 500 pounds per square ' foot (psfl begiraning at depth of 3 feefi belova the ground surf�ce. The skin fricfiion value should be increased by 1/3 to account for v�rind and s�ismic I�ads. End ' , bearing of pier� should b� neglected, in design because of the difficul� in � cleaning out srnall diameter holes. Resistance to lateral load� can be achieved �I � '�I i a� �nve�te��t�60� Co�su�tant� Nir. �arnes October 15, 2011 Job 2410.0200 Page 11 by applying a pas�ive equival�nf fluid pressure of 500 pounds per cubic�oot (pcf) acting over 1 % pier diameters beginning at a depth of 3 feet. Where not supporting a foundation retaining �rall, we r�commend that piers be interconnected by grade beam� to avoid p�t�r�tial prablems �ssociat�d with isolated piers in expansive soils, and in seismically acfiive are��. Isolated d�ck piers are acceptable. It has been our experience that potentially hard dr�lling conditions may be met in the cobbly bedrock. Hence, it is import�nt th�t the foundation con�r�ctor be prepared by employir�g dri!ling equipment with adequate �dov�rn pressur�" and equipped with rock bits. In the event ground water is encountered in the pier holes, it may be necessary to remove standing vva�er by the tretr�ie method. If pier hoies cave, it will be necessary to in�tall casing to maintain the holes opzn unfii! concrete is placed. Slabs-on-Crade Slab subgrade should be prepared as recornmended i� th� Grading section above. All concret� slabs should be at least 5 inches thick and underlain with a capillary rnoi�fiur� bre�k consisting of at lea�t 5 inches of clean, #r�e-dr�i�ing, crushed rocic or gravel. 1lVhere migration ofi moisture vapor fhrough the slabs would be detrimental, an imperrneable moisture vapor barrier �hould be provided between the gravel and the slab. it may be prudent to place an addifiional 2 inches of ctean sand over the membrane to protect it during construction. Slabs should be reinforc,�d with at leasfi no. 4 bar� with an 1$-inch orthogonal, center fio center spac�ng. T'he slabs �hc��ald co�f�in control joint� to help control the distribution of cracking should it occur. Pavements VVe ar�ticipafe that the driv�vvay pavem�nt �nrill be reinforced concrete supported on engineered fill as recomme�ded in the grading sectian. V1le recommend the driveway pavement �hould contain a s�ction of 5 inches of reinforced concrete support�d on the engineered fill by 6 inches of Class il ba��rock c�mpacted �o at least 95 percent IV1DD. Ea� Irnv�s�a�a��61 s Consult��ats � Mr. �arnes October 15, 2011 Jab 2410.02.00 Page 12 Retainin� Wails __ Retaining walls should be supported on the foundations rec�mm�nded above. '' Retaining walls should be designed for an active equivalent fluid pressure of 50 po�ands pcf for level backfill and 65 pcf far cc�mpacted backfill sloping up t� 2H:1V. Infe�polation can be made befini�en fihe rninimum and r�naxirnum acti�e i °-' pressures �hat are assumed #o act in a triar�gui�r distribution. Any wall that is res�rained fror� rotation should be designed �o resisfi a uniio�rn �ressure of 100 � psf, acting in a rectangular distribution. Walls should be constructed with a� least firvo feet of fi'reeboard to capture slo�gh that rr�ay accur �v�r the project ligetime. Any slough that does accumulate in a �eason should be pramptly removed to retair� fihe fireeboard ar�d positive surface drainage behind the wall. In addition, if the wall i� required to be designed for seismic fiorces per the 2010 CBC, it should be designed for a seismic pressure equal to 15H psf, where H is fhe height of the retained soil. The seismic cc�rnponent should be considered a line-load acfing a4 a point 0.5 times the wall height above �he wall base. Retaining �ralls should be fully backdrained. Retaining wall backdrains should consist ofi either a geosynthetic drainage rnat and properly placed perforated pipe (as specified by the manufacturer, i.e., Miradrain 5000 or equivalent), or of 4-inch diameter, high cru�h stren�th, p�rFora�ed SDt� 35 or better PVC pipe embedded in crushed rock and sloped to drain at leavt 2 percent to outlet by gr�vity. Perforated pipes behind uphill and sidehill buildir�g founda�ion walls, and the upslope drivevvay retaining v�all perForated pipes should b� locat�d at l�ast 8 � inches below#he proposed cravvi �pace, and slab elevations. If the crushed rock alternative i� chosen, it should consisfi of a prism no less th�n 12 inches vvide that extends to vuithin 1 foot of the �urfa,ce. The upper foot should be backfill�d vvith compacted �oil #o exclude surface �nr�,ter. Drainro�k should be separated from the soil by filter fabric. Retaining enr�li backdrainage should be direcfied to the � storm dr�in. Foundation retaining �a11s should be thor��ghly wafierproofed to preven� detrimental rnigration of moisture. I�etainir�g w«Ils will yield slightly during baekfilling. Therefore, ►nralls should be backfilled prior to building on or adjacent t� them. We recomr�end that the ground surface behind retaining vvalls b� sloped to drain in � positiv� manner�o that ponding and erosion does not occur. If nece�sary fo , achi�ve thi�, open, reinforced cancr�te lined gutters should be designed. Each gutter should drain to grate-covered catch ba�in d�signed by �he project engineer. Given the patential for tree lea� accumula�ion, �nre recomrr�end that a provision be rnade ta avert clogging af the basin inlet and associated drainpipes. In turn, the ba�in should b� connected to � solid pip� that carries water from the a Inves�� a#�� � ��sultants Mr. �arnes October 15, 2011 Job 2410.02.00 Page 13 catch basi� to the storm drain. SurFac� �nrater shculd not be div�rted into any subdrain. Debri� Flow Def(�ction VVall We recorr�mend that the building site be protected from silfiafiion from debris filovu by construction of a minimum 4�-foot high, reinforced concrete deflection wall along the s�uthern properfy line and �nrest side of the building pad (Plate 11). This measure wiN require removal of the berm, and i� acceptable, placement of the deflection wall in front of the existing berm alignrnent: We judge the potential for high impact to the �all by an advancing flow given the moderate slope (approximately 20 degrees or less) betuveen the potential source approximately 200 feet from the proposed house �ite, �nd the tendency for debris nearing fihe site to be directed to the lovver elevation of axial part af the drainage west of the building site. Therefore, we recommend that the wall have a minimum thickness of 12 inches designed for a laterai pressure of 85 pcf, and supported by drilled piers, as described above. Drainaqe Positive �urface drainage gradients of afi least 3 percent should be provided for a distance of at leasf 5 feet away from all struc�kures. Th� drivevvay and pav�d parking areas should drain po�itively away from pavemenfi subgrades and building foundations to �he street. It rnay be necessary to install praperlv sized : area drains to achieve this. VVhere the upslope side of a building foundation is not de�igned as a drained retaining wall, we recorn�nend that a perimeter foundation drain be insfialled ta intercept pot�ntial seepage. The foundation drain should �xtend to a depth ofi at least 12 inche� below th� crawl spac� elev�tion, and at least 8 inches below a : pavernent of sl�b se��ion. T'he foundation drainage #rench should have a minimum uvicith af 12 inches and the exposed soil surfaced r�ith IV�irafi 140N or better �lter fabric. A rr�inimum 4-inch diameter perforated, SDF� 35 PVC drainpipe or b�tfier, laid holes dovvn, should be placed at the bottom �f the trench with a minimum �lop� �f 2 percent to drain by gravity to outlet. The trench should then be filled fio vvithin 12 inches of the surface vvith 3/�- to 1 %2 -inch drainrock. Place fiilter fabric over the fiop of fhe drainrock and �II the balance of the trench vvith cornpacted site soil �ith a finished slope avvay fro►n the foundation. �nce outside the gravel section ofi the trench, the perfor�ted pipe should b� cor�nec�ed to a solid SDR 35 drainpipe or better to carry wat�r to the 5torrn drainage systern. Cleanouts construct�d to solid SDR 35 PV� pipe should a I �es�� ta� s C� sulta�#s Nir. Barnes October 1�, 2011 Job 2410.02.00 Page 14 be connected to the subdrainage system at all bends greafier than 45 degree� and intervais no greater than 50 feet. Are�s where foundation subdrainag� is r�ot feasib6e should be provided vuith a ' �rell-developed surf�ce drainage basin seated in a cor�centric depression. Th� outer margin of the drainage depres�ion �hould be located no less than 3 inch�s higher than fihe catch basir� rirn elevation so that po�itive sheet flow to the inlet is maintained. W� r�cormmend that the house and garage roofs be provided with gutters �nd downspouts. The downspout� should be connected to solid SDR 35 PVC pipe� and these pip�s should carry water to the storm drain. Care should be taken to avoid discharge of drainpipes on unprotected slopes. Erosion Control Following constr�action, barren �oi1 �ur�ace should be protected from erosi�n. An erosian control plan should be prepared. �IJPPL��E�°fAL S�RVICE� We recornmend th�t vve revie�r the final foundation, grading and drainage plans for conformance with the intent of our recommendations. During construction, we should observe the rough and firoi�hed grading operations, foundation excavations prior to steel placerne�t, and the 6nstallation ofi all drainage fiacilifiies prior to burial to ascertain that our recommendations are followed. Upon completion of the project, we should perForm a site observation and report the r�sults �f our work in a �nal report. These ser�ices are outside the present scope and uvill be billed on a tirne and materials basi�, in accordance with th� fee schedule current at that time. These services �nrill be perforrned only if we are provided vvith sufFicient notice to perform the vvork. We do not accept responsibility for items fihat we are not notifi�� fi� c�b�erve. VVe r��c�rr�mend that the Ovvner be responsible for notification, no I�ss than 48 hours before the requested site vi�it. Ea Invest�ga��64 s Consul�a��s iVir. �arnes Oc�ober 15, 2011 Job 2410.02.00 Page 15 lie6`JE�1`1��7'I�Id L.I�I1°A�'I�P�S This report has been prepared in accord�nce vvith generall� accepted geotechnical engineering principles and practices, and is in accordas�ce �ith the standards and practices set by the geotechnical corr�ultants in the area. We ofiFer no w�rranties or guaranfiees. Subsurface conditions cou(d vary betw�en those indicat�d by the tesfi borings and interpreted from surface �'eatures. A representative from this oifice �hould be present to provide construc�ion observation services, to observe the exposed geofechnical conditions, to modify recommendations, if necessary, and to ascertain that fhe �roject is constructed in accordance with the recommendations. This report is submitted with the understanding that it is th� responsibility of the Clienfi (Owner) to ensure tnat the applicable provisions of the recommendatior�s contained herein are made knowrn to all design profiessionals involved with fihe project; that they are incorpora�e� into the ccnstrucfiion draon�ings; and �hafi the necessary steps are taken to see that fhe contractor and subcontractors carry out such recommendations in the feld. Ifi conditions di�ferent from those described in fi�iis report are encountered d�rir�g construction, or if the project is re�ised, we should be r�ati�ed imrnediately so that we may modi� our recommendations, if warran$ed. The practice of geotechnical engineering chang�s, and, �herefore, we should be consulted to update this report if con�truction is nofi per�ormed vvithi� 12 months. �IRl° ,A � Periodic land maintenance wiil be required. �urface and subsurfac� drainage facilities should b� checked frequently, �nd cl�aned and ►��,i���ined a� necessary. a�h I v�s#i �i s �nsu�tant� Mr. �arnes October 15, 2011 Job 241 Q.02.00 Page 1� REF�R��6C�� ' California Division of 11�ines and Geology and Sfiructural Engineers Associafiion of California Seismology Committee, 199�, rr�aps of knovvn active fault near-source zones in California and �djacent portions o�f f�e�ad�: Int�rnational Conference of � �uilding OfFicials. Cotton, Shires and Associates, 2003, City of Cup�rtino Gealagic Fiazard iVlap: -- wvv�,��.cottor�shires.com/reso�r�ce�/rnaps. Geoforer�sics, Inc., 1996, Geofiechnical investigation, finro proposed residences, lands of Rainbows End Es�ates, Inc., Rainbow Drive, Cupertino, California: Geotechnical consultants report, Job 9631'122 pgs with illu�trations. Hay, E.A., Cofiton, W.R. and H�II, N.T., 1980, Shear coupEe tectonics and the Sargent-Berrocal fault system in narthern California, in Streitz, R. and Sherbourne, R. (eds.), Studies of the San Andreas fault zone in northern California: California Division of Mines and Geology Special Report 140, pgs. 41-49. PG & E, 1998, IVlonte Vista Wolfe and Stelling I�oping Project A98-10-026, Santa Clara County, California, in Geolagic Problems section, California Public Utiliti�� Commission CEQ� reviev�r: vwwv.cpuc.ca.gov.environment/info/e�a/monta/monta_geo.htm Petersen, (VI., Bee�y, D., Bryant, V11, Cao, C., Cramer, C., Davis, J., Reichle, fV1., Saucedo, G., Tan, �., l"aylor, G., Toppozada, T., Treimara, J. and Vlfills, C., 1999, Seismi� shaking pnaps of California: California Division of �iines ar�d Geology fVlap 4�. Sorg, D.Fi., and IVicLaughlir�, R.J., 1975, C�eologic rnap of �he Sarg�nfi-Berrocal faul� between Los Gatos and Las ,�It� Hills, Santa �lara County, �alifornia: U.S. Geological Sunrey (�ap, �cale 1:24,D00. a �n�r�sti��tiq��� Con�talta�nt� b �Ilr. Barnes October 15, 2011 Job 2410.02.00 Page 17 �ERI�L �Fi�TOG PH� ' - Source Date Job �lo. Flight Line Frames Scale USGS 7/3/65 CIV 1DD 261-263 1:20000 5/4/65 GS-VEZ12 1 101-102 1:12QOp 7 0/28/80 SCL 1 1�6-187 1:24000 The following photos, plates and appendix are �ttached to compl�te this repor�: Photo 1 � Southwesterly view along end of Rainbow Driue toward site... Photo 2 — Northeasterly view of debris slide scarp... Photo 3 — Easterly view of proposed building site... Plate 4 — Easterly close-up vie� oi propGSed buildir�g site... Plate 1 —�ficinity IViap Plate 2 — Site Plan Plate 3 — Geologic Hazard I�ap Plate 4 �Seismic Hazard Zone f�ap Plate 5 — Log of Boring 1 Pfate 6 — Log of Boring 2 — ' Plate 7 — Key to B�rings ' Plate � — Ro�k Hardness Griteria ' Plate 9 — �'lasficity Chart ' Pla�e 10 — Generalized Cross Section A-A' , Plate 11 — Debris F{ovv i�itigation Appendix A — Previous Site Explorafiions frQrn J�P (19�9, 1991) and Geoforensics, Inc. (1996) ; i a h I�vest�gatn��� ��n��ltants I1�r. Barnes October 15, 2011 Job 2410.02.00 Page 1� We trust this report provides you with the information you require at this tirne. F'lease contact the und�rsigned if you have any questions. ,h..��,��� �,�'�:��'� ., � � Very truly �ours, �,,�.. ,�°`�. ��c�� � �rth Ir�v��t�gati�ra� �o�a�ul r� ��������° '� ��''�, � �'. �' Pi�.EG T 7 32 ' "�� -.. - � � CERfIFtED E�3GlNEERlNG �� GE�LaGi6T e,�� � ,..� ti�=f� ��� �� �' Joel �, Baldvvin, II �a ���A`�`J Principal Engineering Geologist (rene��! d�te 2/2�/13) �"°���',� �.��� 1n�. � � �o p�oF�gsi ��•�' de�h: c�9< David VV. Buckley ,� Civil Engineer 34386 (renevval date 9I30/13) � � � � � ��`�' '� a� JEB:D�l1{�:jb:gi � Distribufinn: electronic capy and 3 bound c�pies to addressee 9� ey�yt �- ��GALI FORN�� I I �� . a h Inves�igati��s Con����ant� I : retaoning �ral1 supports dow�slope side of rondway. � 0 , a — - ---, --- -- -----r- - -- - • - -------- Drive fr°om unc��trolled storr�► dr�inpipe discharge into lower segme�t o$ ephemer�l charane6 �cross s$re�t f r°orn site. � � � .� ,�, � ,.. � .' • " r � a� '- � '� • r , , �;', �,� —� �, �� � ; � '�; � N —c.3 � �wZ'1 Y"4�l�� ! } +N$ �N � #' e� S k f .f ��� �1 . V �F� �1'f t"*'�'^� 3 31 ;:l�, f y� � 1' 'f�'� "+� 1 �� i� .w� �y$ `1u 1 �M€I.q�„ rs-�� �� �` �"'� 'y�� c�' 4�� � ����i'� !�y$���, ��i�`�Y�i � r�' ,� i . — {. x�' s ! 'la'n-, if in�o-�'`.s�,y„3�k��'"y �4d'� t„�f;, . , . . 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Cabbles in the Sc�nt�t Clcara for�rt4tion $orrn irregular° hiilside stsrf�ce of hillside �o �ight �bove prop�sed bt�ilding si-te. . _� � , - - � :: ° _ - . . _ _�_._ : _,. , _.. . . ..,. ,. � „ � � _ ; .. , . . �., _ . _.. :. , ;,. F ,. , < �. , _ t ;� . ; ', " _ .- : ; ;: �_ ;� `; _ � ., ��'' � ,� `. . . : _ _ ° . , :,; :. _.� . , , „ .. , . ��� �- �, , r., , ; ,. � � , ;, , , ,_ _ . _ ;, ,� , , , , , _ ; ; , . ;'. ` ` ,. ,, � _ _ _ . ' �pproximate - , � � , , �� �� � 5it� Location � ' � � - , ; ,_.,. . . _ _ - ,, - - _ , ,,. , , �, _ ,_ , ; t . , � � ., _ . . . _ __ , . ; . � � � _ � � , �: , � _ . . _ ., _ _ ,_ � � , . . , . , . , - :. _. - . , - _ ; _._ : ; , ; �; ,-. � � � - -. _,� � , __ _. , . ��� , , - .. � - � __� ; . . , _, ..,� . , �,, ,; . _-.. .. " _.... t ' -. _,.. ��:� r ;. - �-���, � ,, � . .. ; .. . - .._... „ , � . . :. . . . ., � , � � . , ��,,' � _ ; , - � � -... -,.. , -��-. __ -.:.. .:. . . _ �., .,. �,. - , . . , , . . ' � .r - - -, .,, , :., , ; .:' . . _ . -� - ,.i . . . .:�' ...?:.... ..._.. . __. . .-� � ; :� � ,.. .. ,. . , . . . . . . ,r..�i. � . ., ..,... . - .._- .-,:. . ', .:,. � , , ; ._-. ., � �__� , '. - . ,:r i ' ''� ;. . _y � . . . Q 1��0'�f. SC4�6 � U.S.G.S.Topographic Nlap , _ Cuperi'ino Quadrangle,7.5'Series(Phoforevised 1980) Contour interval=40' I . 2 10.02.00 �I ' � � i. I�I � I�V �1 ��IOP�S � I 10/5/11 Cup rtiRno'nCal�iforn ae 73 , o ' - ;�GIP-1 EXPLAN.4TION 1 �Rttitude fram Sorg o _ (�c Colluvium � Rs/l"ss 3�McLaughlin(1975} \ (�sP slopewash �:�i � . . � �'� � . �S Residualsoil 4 - _ ��--. , - . ` , � . ` � _1 _� ; ' ' , - ' ��S Santa Clara formation . \ � _, .� ,- ``..-'� -� i i - TSS Unnamed sandstoae � , �� `1 � � �. 6IP2 ;, . � , � - .. _ �I � :�- . �'� ..�' �.. �i . - �'� ."--- � ,.. _��.� Inferr g g rorctact ed eolo ic - ,q �I -�L� - � Approximate limit of debris slide;arrows ���'� � y � � .- ��- _. � . � / ate movement d�rection hachures , � � .' ��` , : , . G mdicate scarp �' �--'..._ � _. � --- .. - . ��� .,- ,_ • � -.� �� � . . . - .. _` n . � � . � \� -�- °' ' _,44 �/� Gully erosion(LPP discharge) , I - � � _ _ . � ' _ �� - a'� Cobbles,subangular to subrounded .. A�� � . . ,� , � � � �:- � . . • � `���`�I .' ' <' .� � � �� �� � - Approximate boring location for this investigation � � �� 6 �r_ - ._ � . .��_. �"._ `. - � 6IP-3 locat on(1996)eoForensics Inc.test pit - - . . �.� .:� - .. - r�e , - � \� �. ,�' '�._. m°L°°�!�\ , - - QC��YTS_ , _ � ��- � I ; TCPB-1-� ApproximateSCP boring locntian(1991) � : 1 � " . � � \1 , � -�- �� � . . � TCPB-1 JCPTP-4 Appraximate SCP test pit Iocation(1989) l 1 � \ A A' Line of cross sectian A-A' . �� � --- - \\I � � JCPB-Z � ;--i � ,:,< - - - \ ,__ -� _- - � - �l �_. _ __ ; � '_ . _ , ` � \. P 4 - -` , ' - __ ` � GIP-3 ` � ,�' � �� � , _ JCPT �_- - — ' �' ' .`._ . ,' . -:_ . . i`�. .�:. ' �� .. -_ ' � � p . - � . � -, . . ,.. � � �. GIP-6 �� __ \ ,' _ -`. � ' Q o ': _ -- GIP 4 � \ QSP'IC�TS i r @'B20P�S `` � � �� � ' B2 ' - _ - % � - — . - �� � ous� � - � � � o � - � o' o ' Qc%QTs - � (� � � � ,� � � i � Q � ' � �' � , � I B-1 \ n p�°° ��'� �� `\ � � � o �. \` � O � - \ SCPTP-6 � � p ° e � �\ _ _ GIP 5 ' _ . _ . '�_._ . .. ... . . _. _. . \..--.. . . � . .-, _.._ .,.__,..__. ._ . . _., ._. - , ,. _ . .-._ .-_ ...,-- . 2 0.2.00 Debris flow deposits � ���h 8�9v�u�0��$90ryS (GeoParensics Inc.,1996) (;p�������� pffi 10/5/11 0 2o ft. Scale Contourintervai=5' , Base map from Giuliani&Kull,Inc.(2/2/2008) �o�r�P P�at� 21740 Rain6ow D�ive 2 Cupertino,Califomis _ , <. _ , . ; � � �� ' , � ,: � .� �. �e �pproximate : 5ite Loc�tion .: .. � � ��� � �� �, - ,� t� �� ` � � _ i .�C'�1l/�.: � �� � - ;;;, . :; �u4#ici�l , _ . ,_ , r' : �and�lid� � ;" , ,;,..; . ' , ,. �e , , � „ : � ,. . � .. , -_ _ ; . �Is �/s ' � __ I �._ � - , ��. �� �� - , � �� � � . , , � EXPLANA��N Qg Surfieia)depasits Q�5 Landslide deposits Qo� Older alluvium QTS Santa Clara formation TSS Unnamed snndstane nnd shnle .�__.. Geolagic confnct,dotted where concealed Anfiicline fald axis Landslide deposits,boundaries of landslide 0 500 ft. deposii�known. Arrows indicnts general �CQ�� direc�ion of movement. 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'� �z. i`- :�$ r . i � �,:�r � ----.._,.� :,tr �. ,.y. k.�� � � � ,� �J EXPLA�JA Oi�l Liquefaction ' -�` `'s Area where historic occurrenee of liquefac�ion,or local geologicnl, �.: geotechnicnl nnd groundwater conditions indicate a potential for permanent ground displacements such fhat mitigotion as d�7inecl iri Public Resources Code Section 2693�would be required. Earthquake-Induced Landslide Areu where previous occurrence of Inndslide movement,or loca) 0 1000¢t. fopogrnphic,geolagieal,geofechnieal and subsurface wnter conditions Scale indicate a potenfinl far permanent ground dispincements such thaf mitigafios�as defined in Public Resouree Code Sec�hion 2693o would Frovn: State of Cnlifornia Seispnic Maaard Zones AAap be required. Cupertino QuadrAngle,7.5'Series(2002) � . 2410.02.00 ' I � '��� � ��V I ��O � � 21740 Rainbow Drive 10/5/11 Cupertinq Califomia 76 � � � � �o�l�� � ,� T'rack Mounted Fliqht Auqer � Q � � � { � � ? �657' 9/16/2011 ��� 0 SC �ark yellowish brown Clayey SAf�iD,moist,medium dense SLOPE WASN ' Dark yellowrish brown Sandy CLAY with Gravel, � 110.9 10.8 25 moisf,stiff i'o hard � ' `� (SLOPE 1A/ASH) I 5 120.7 11,5 4A � � i Q �� CL a� 125.7 12.2 51 � �� 4.����^=ti� � �S 122.5 13.7 38/5" � _ � -- 111.5 19,3 38/4" Yellowish brown and grey CLAYSTONE,very weathered,closely fractured,soft ROCK color changes to grey nt 22' � (SANTA CLARA FORMATION) 25 _ � 113.5 16.0 55 �� �' Terminated at 26 2 ' .-. � � Q- - a� � , � �� o . 2410.02.00 ' ' � II ���' � 21740 Rainbow Dme - 10I5/91 Cupertino,Califomia � I� �I 77 � A � � � � � � ,� Track I�ounted Fliqht Au�er n cn � � �� � _ �675' 9/16/2011 0 Dark yellowish brown Clnyey SAND with Gravel, SC maist,rr�ediutn dense(COLLUVIUM) Yellowish brown and dark yellawish brawn Cabbly 110,9 7.7 25 Gravelly Clayey SAND,moist,medium dense to dense to very dense 5 (SAiJTA CLARA FORRAATLON) j 116.7 5.2 31 1,- � r 10 � a� � 1Z6.8 3.3 67 � -,� •��°����� SC GC 75_ 115.2 5.3 38/4" I � I 20 I 124.0 4.0 3�/5" I 38/4" Terminafied at 25'4" . � � n. a� ❑ I � Inv tig °ons � ��,�.�Z.�� L F I lat ���� � 21740 Rainbow Drive � 10l5/11 Cupertino,California 78 �Il � � 9f�s _ GROUP .i �Id I��I0�8S SYMBOL � ���/��� CLEAN Well graded graveis,gravel-sand mixtures,little or no fines. � GRAVELS �'� J Poorl raded ravels or ravel-sand mixtures,little or no fines. ow °o MORE THAN HALF (LESS THAN 5%FIfVES) G� Y 9 9 9 Q o OF COARSE GRAVEL Silty gravels,gravel-sand-silt mixtures,non-plastic fnes. � LL�W FRACTION IS WITH �''� � �� N LARGER THAiV FINES GC Clayey graveis,gravei-sand-clay mixtures,plastic fines. -- �z cn NO.4 SIEVE Q F-� �A��$ CLEAN Well graded sands,gravelly sands,little or no fines. C' �w W SANDS �W UJ ��� MORE THAiV HALF (LESS THAN 5% FINES) �� Poorly graded sands or gravelly sands,little or no fines. � �J OF COARSE SANDS Silty sands,sand-silt mixtures,non-plastic fines. � w� FRACTION IS WITH S� Q � SMALLER THAN FIfVES Clayey sands,sand-clay mixtures,plastic fines. � N�.4 SIEVE SC ,�� S I LTS AN� C LAl'S Inorganic silts and very fine sands,rock flour,silty or clayey fine � �J ML sands or clayey silts with slight plasticity. �J Inorganic clays of low to medium plasticity,gravelly clays,sandy ' � �¢��°o�w L I Q U I D L I M I T I S CL c lays,si l t y c lays,lean days. � � z��� LESS THAN 50% �L Orangic silts and organic silty clays of low piasticity. � � i�Z W S I LTS AN D CLoqYS �H inorganic silts,micaceous or diatomaceous fine sandy or silty � I—�¢_ soils,elastic. � aw W�� Inorganic clays of high plasticity,fat clays. LIQUID LIMIT IS CH � �� GREATER THAN 50% OH Organic clays of inedium to high plasticity,organic siits. HIGHLY ORGAfVIC SOILS Pt Peat and other highly organic soils. � D�flnf#aon of T� s a . d ri � v� I qu Si�v� nin � 200 40 10 4 3!4" 3" 12" . SILTS AfVD CLAY SAND GRAVEL �OBBLES BOULDERS FINE MEDIUM COARSE FINE COARSE Gr�In �iz SANDAND GRAVELS BLOWS/FQOT'� SILTSAND CLAYS STRENGTH "� BtOWS/FOOT" VERY SOFT 0-1/4 0-2 VERY LOOSE 0-4 SOFT 1/4-1/2 2-4 LOOSE 4-10 FIRM 1!2-1 4-8 MEDIUM DENSE 10-30 STIFF 1-2 8-16 DENSE 30-50 VERY STIFF 2-4 16-32 VERY DENSE OVER 50 HARD OVER 4 OVER 32 l �!$ ° � 'Number of blows of 140 pound hammerfalling 30 inches to drive a 2 inch O.D.(1-3/8 inch I.D.)split spoon(ASTM D-1586) "*Unconfined compressive strength in tons/sq,ft.as determined by laboratory testing or approximated by the standard penetration , test(ASTM D-1586),pocket penetrometer,torvane,or visual observation. � � Sample location;blow counts Iisted are from the bottom 12 inches of 18-inch drive sample. �, I I Unified �oil Cla�sification �yst�m (AS°fPVi D-24�7) • 2410.02.00 � � t ' tl a ���� � 21740 Rainbow Drive � 10/5/11 Cupertino,Galifornia 79 �, c s c i� �� V�ry Hard Cannot be scratched vvith knifie or sharp pick. �reaking ofi hand specimen requires several hard blows of geologist's pick. Hard Can be scrafched vvith knife or pick only with difficulty. Hard blovv of , : hammer required fio detach hand specimen. fl�oderately Can be scratched with knife or pick. Gouges orgrooves to 1/4 inch Hard deep can be excavated by hard blow of point of a g�ologist's pick. I Hand specimens can be detached by moderate blow. '�, Medium Can be grooved or gouged 1/16 inch deep by frm pressure on knife , or pick point. Can be excavated in small chips to pieces about 1 inch , maximurr��ize by hand blows of the point of geologist's pick. �o� Can be gouged or groov�d readily with knife or pick point. Can be ' excavated in chips to piece� several inche� in size by moderate blows of pick point. �mall thin pieces can be broken by finger ' pressure. VerySoft Can be car�ed with knife. Can be excavated readily vvifh point of pick. Pieces 1 inch or more in thickness can be broken with finger ' pres�ur�. Can be scratched readily by fingernail. I i i Subsurface IVlanual for De�i�n and Construction of Foundations of�uildinqs 1976 �I Published by American Society of Civil Engineers. � 2410.02.00 � � � � �� � 8��� � �f1� �1 ��IOPI� � � 21740 Rainbow Drive - 10/5/11 Cupertino,Caiifomia 80 so so � o ��a ,q��� � 40 s� W � �L Z 30 65 � RA FI � or 20 � Ots 10 7 C�ML ML oe' OL 4 — — p IIAL 0 10 20 30 40 50 60 70 80 90 100 L.IQlA1D LI�11'f(%) PIATID�L PASSifdG I�E�' �OR9�G SAf�flPLE iPUATER �BQUID PLA�°�ICI°rY N0.200 L,OQIlIDI DEPI°@� l95C� �Yi4��Ol, NOe COtd°�EPdT LIM17' IM� $BEVE LRIDEX (teet) (%) (°�o) d%) (��o) �-� 3' 17 34 20 6� -Oa2� CL • 2410.02.00 ' I I � ' � ����' � 21740 Rain6ow Drive 10/5/11 Cupertino,Califomia 81 � 700 _700 _ v -';.' ,-, :— _� `-' �j ' � PROPO�ED IiOIlSE J -, 680_ I-,:--------- =� _" B-2 /�� = ,-� bso //= ,�� '� � � � �% _ � /�• .-� �<� ' r1 J V +- � ` J: - <J ✓ oB-1 ,!� � ''���� '�' ` "' �. 660 ( '� " J`Jl � L, b60 � d � � Conglomerate�/J ����1 � �� /? ' - w /—'!� / �i'/ > �-, _:�C,? ! ' < ,�� /%/ /�/' L) c-� ,�.TD 25 2,, Qsr ��� ��?�`/ . 640�� /� Claystone� /���,� ` 640 / ,/'t I QTs I � � TD=26 2' �� : 620_ _— __ —N 66 E __- — ,� II 620 Seale 1"=20' ' I - ���0.02.00 �ENE IZED CROSS SECTI�N A A' I�t� �' Inv fi� °on ', ������ � 21740 Rainbow Drive 1 10/5l11 Cupertino,Califomia 82 � i `�- � �� 0 20 ft. - --} Scale � Contour interval=5' . _ _ - � � � Base map from Giuliani�Kull,Inc.(2/2/200�) 4_.' ,... - .; ,, � ;, -- ,, ✓J 1., i j „ i. ;. '-' .� i � . -._ . �. ,,., "_ ..,.. E � . ,. .v .l ..:� 4 a' �`;'I '; � ..t/� _. .�� -. .., M1 '1„ ` <' �' ,-�., . ,i��� , /':�.:I° ..?'�l i�� . \ � �� I L+`��� � ',� �-. t �� _ � r` �} /� 't � � )1 ' � ! .� , r, ,. � y� _ i �/ , � �:�� �,. ��� �_ �� �' � _ �T�,�:1 .;'; 'i . � �-., __. � j: . ;., � � .,{ __ l _ '�,� A " ,/ .,7% �-j�',_r;-' ry, _ �.� - =�1 �� r ��r � , r ` �'r , _ ,� : �� °� y , r ��_. _ � ^ °' `-� - ,a h_ .. _.,. _w , � ,.� � �,� -..m P?i '• . � ,,.y .., �r1 .,. , F/. � j . - _bl. -^� \ �::1 T� }�., , 'i? '_ �r�' . :.� ��, .. -' I ��r . . i�.! , ,_ �__ _ ��'_.1 � - ,., .' �� .., i`-' _' ..-.. - CO �P1 � 9 Il�o `' 9 � a �rnpact/diver�aon �arall integratecl �t r� erfiy si# 11 . 24�0.02.0o i L I I Ti I t I I ti �i �, ����' � 21740 Rainbow Drive 1 1 10/5111 Cupertino,California ��� �_� 83 Mr. �arnes July 11, 20�1 Job 2410.0�.00 Page A1 �PP�I��i�� This appendix contains logs af test pit� from previous si#e investigati�ns by JC� (1989, 1991) and G�oforen�ics, Inc. (1996) Th�following are ati�ched: JCP (1989) Tesfi Pit Logs Log of Test Pit 4 Log of Test Pit 5 Log of T�st Pit 6 JCP Hand Auger Boring Log� {199�) � Log of Boring 1 Log of �oring 2 . Log o� Boring 3 Log of �oring 4 Geaforen�ics, Inc. (�996) Log of Test Pit 1 Log o�f Te�t Pit 2 � Log of Test Pit 3 Log of Test Pit 4 Log of Test I'it 5 Log of l"e�t P'it 6 , 84 ( �} N25°W NbSk,, T P-y 1�P 5 � Q1'06 d-a10 �5 �1{� oTOD 0+06 �tri0 t � t t t I ! 1opS��1 SUbSo�l ' o ToQsfl�1 ' o � s ' , ' :�,{�,, .;�,_,._ ° o ,� - " ' -�._-;__°� Le -°=e°� °a d� '� _ ;. _ . . �,� � °-- - - -��-��.;-°. . - . __ - . �o ° , ° • ° � ._ •� • e �� ° sm- -'-- -o-- , ^7-e' , p_ � � . - . � . . � .. 1.J . s �Aas,ea _ o/w �• , `�s ' �' � � •� 9 � +� • � � a�. �� a�. • e � C . . _. �. 5 � , 7 �,.., 6er�ror�� s Paedro�k � � . �,- �o ►a � , lo �{G.t1 a'�I n�1 - F x p�c�-►ca,�i oh • � �il�, c.�aYe�? �oc�nded pckbl��sd pr��,n�c�� � . � ` �'jil�-1 Sc�nd� $' �roJ�° �r'oc�s� Co�or, s�¢� -�°o -t�rrv�,1`1L��Tap�oil� • ` or�atti�.�� � ' Sar►d, �ilf�, ro�r�ded p�bb`e�, rDa+g> -�an=br.ow� ° . ° Saa�d.� �e.b - ��(er,, rvtec��ur� de.�se, s�i, (�u6so°,I) ,' ° alor, ,m�.d . c �S G,Yt}c, �,�c 'a@a,.� JQtldr b � �1{�° aXl(.� G�CI. C � �QY} fo r�dd,s� _ � ' ... °�'�"o braw�t l.tl��� �e�l�b �Q Ul� �`�V�,�J�� �J�/��' ,. (5a,,n°h�, �lo�.rod, Far�ta�-�n��� ` � � ; 'I � I , ; I .. , g5 - � N5°E ��—r--� P-b � ��t�r'J Ot20 0428 , i � i �r°° o i os O�10 O�I S Ot'C}h 1 r p � O • _ -. � � ToPso,1 � � � � , - � � - '�:::.'� a � ' °' _~ � ' . � ° , . � b � � •. � p • � °-h� f� _� _' s _�� --'~—_'D_r_'���p �� e- � ' Y e 5 . � S • � .� • S �� '� , . ., o � � �uy ��Fe ��5� lo i� 10 , �x�lana�'to� ' �d pebbl��, Mvnar l�,yp -.. ' S;l�, �Sandy a.r►d c.IG,�e�, or a,,��e�, �rQwv� 5i�r, °�o��-'r �'r� �tir�,ML� 5oil� � ��or,�''�� ;�o�.5t6�� f1L� C��p�d�I� . � � : a.�td c� � , °�,r► b�-os,� - v ° � �►i�, Pe,4�bly � sand and Gla�c. , Y'oo�-�, _r �' y I • 'orow�1 Colo�- 5�►f� �� v�r Sttf� (v1 t �� -� ��n�c, Sn�sL� � Y ' � - ,��,+`�,,1 �Guliy slope, k,�.s�) J � ,. , �an�P�e �ae.a_-Fio,n iV Dfc,= �1C5G Cleo�tG. r± CS� �t'� ��S G.r� `�C.�exrta.�lcr �I � I(��}SfY'�`�10�15 br DbSG('VP.,� c.�e0�c�ic �eQ.�ure5 Ctrtd s`�oc)ld �af' (oe u�ed -For' �1� o-�h�r �ur�ose. I �EQ�ORENSICS INC. 555 Pilgrim Dr.,suite A;��oster city,cA 94404 Logs of Test Pits by T�P, 1989 Tel: (415}349-3369 Fax: (415)571�1878 � 86 _ • Ofl(1 l�B: 3�� , n �neers � @0 O tS�S,. T1C. @ : raun water as not �nc�unteee ate r� e a 14 991 r� � ; an ri e r �i ept �a�p�� Density Other si Descri tion �nd Classifi�at��n � PC Tests 4 escri tion an ema � � ar ensi�t. T � f��t � � 6° ; , si ty, san y, r�� brown loose �L 1 , i;;:; �ra ments �PSOIL � 40 7 ' =�! � i�G . ' SILT, �layey, highly vdeathered h�rd to 3 � 35 g - - rack fragments {WEATHERED �rav�n s�i f f 1�L � SA�fA CIARA F�RMATI�N) 4 SPT 2 6 1 0 � g SPT g SpT 2 9 9 SP°f" 7 IL N , san y � A A brown hard F�C SPT 48 7 CLARA FORMATION ottom o oring = .5 eet V�I - Water Conten4 (%) S = Penetrometer Shear Strength (KSF) LL= Liquid Limi� P1 r Piastic Index N = Penetration Resistance (Biows/Ft) SPT = Standard Same����t n es�(SPT Terz ghi) RXPRack NOTE: Sampler blows are adjusted to c�rcespend ta standard p , � i li � Rainb�w Drive or�ng JCP �n ineer� �. ���lo i�t� lric-ate Cupertino, California 1 ,1 p ob um er � .�1 31 80 � 87 I orin ze; n �neers ��o �sts,. nc. . roun m�ater as not encountere ate n e a �9� 1991 r� i : an ri e r � D�nsi Other Desc�ri tian and �l�ssifi�ti�� oi ept S�mple �� � T�sts escri ti�n an �ma s a ar �nsi�t. T e fe�t °f e °� �. , san Y�� �glNEATH�R�� � rock fragmen ( � 74 5 ` SANfA C1�+RA FOR�AI°lON brown hard 2 FO�A�,4TiaP� brown hard �C S�TT 6 6 1 0 ottom o oring = 2.5 eet W a Water Cor�tent (%) S= Penetrometer Shear Str�ngth tKSF� Ll.=Liquid Limit PI = Plastic Index rt N = Penetration (�esis tanc e (B f o w s/F t) S P T= 5 i�n d�a�a d����et a on es�t (�SPTCT��rz gf hi) R XP Roc k NOTE:Sampler biows are adjusted to correspond t P , � � � � ; I I � I �I �ainb�w ,�rive or�ng JCP �n in��r� � �e�l� ist� 9nc. �� ��rno, ��tifornia 2 �b umber ��� P 318� a -91 88 tl '_ , or�n ize: 3� n ineers e�o ests,. nc. . roun vv�ter as not encountere ate n e a �� �g�1 r� i : aut ri e ry �st. Descri tion and �1�sification ei �pt ��rnple Den�ity Index o ar ons�st. °T � feet T e °D PC P.1 escn tion- an ema s ��� �o CLAY, �ilty, sandy, small r��k very �1�-/ � ��' 13 fragment� (l"OPSOIL) brown s t i fi f �L . 2 A� 11 17 10� , � 3 A� 2 7 1 6 1 1 d 2 0 rawn t� 4 P� 51LTSTONE, sandy THERE r�d� 5 y� 6 0 1 i 1 0 6 SAP�iTA GLARA FORMATION) brawn hard � g S�°T 6 4 1 0 ottom a onng = 6 eet W-Water Gontent (%) S g Penetrometer Shear�irength (KSF� LL=Liquid Limit Pl = P(astic tndex N _ Penetration Resistance (Biows/Ft) SPT= St�a$��a����neir�,t on est�(SPT�TeI2aglhi) RXPRock NOTE: Sampler blows are adjusted to correspond t P : � i , , ; � �� JCP �n ine�r� �. Geolo i�ts ln�. �?�inbow Drrve onng ��� : o um er at� Cupenrna, �altfornia � , 31 8� a -91 ' 89 � . ,� onn ize; n m��r� eo o �stsr nc. � : � roun w�t�r a�s not �nc��ntere ate r� e a 14 1 1 r, i : an n e r ' D�scri tio� and Classification o �pt S�mpl� o D�r�sity �th�r � � or onsist. T � f��t T � o PC Tests escr� tion an ��� � M Ll i � � � CLAY, silty, san�y, stnall roc4c br��� �t i f f � � � firagmen�s ' (T�P�OIL) 2 � 14 � � 1 �� � g IV� � 4 � �7 1 � 114 I � S1LT, ci�yey (HiGHLY ��ry WEAI"HERED SANTA CLAf�+ stiff �0 5 � bro�vn hard P�L. P+� 39 14 114 FORMATION 6 � SILTSTONE, sandy (SANTA tan t� CIARA FORMATION brown hard F�C 7 S�l° 54 1 Q ottom o oring � eet W = Water Co�tent (%) S � Penetromet�r Shear Strength (KS� LL= Liquid l�imit PI = Plastic Index t� = Penetration �esistance (���+�s�Ft) SPT����a�d��R'e,net at n est (SP Terz ghi) RXpR�ck NOTE: Sampler bl�ws ar� adjust�d to c�rresp� P Rainbo� Driv� atir�g JCP E� ir���r� $� G��lo 1st� � In�, �4 o um er ate Cup��tir��, C�lif�rnia 31 80 � 'g� 90 Log of Test Pit 1 N80�7i7—} 0 �,,,��,, _ Depth �� ' OO (feet) �'��'"''� ��, � �,,,,���,, � ' �, '"'����, 10 �����<<<��,��� gradational contact - 1 Clayey Silf, dark grayish brown, 2.5Y4/2, slightly moist, soft to : medium stiff, trace fine sand, trace rock fragrnents of fine- grained sandstone, roots and rootlets, root pores and worm burrows, low plasticity, ML (Residual Soil) 2 �and§tone, white, 2.SY8/2, with trace strong brown, 7.SYR5/& staining along fracture surFaces, slightly fractured at 4 inch to 2 foot spacing, mediurn to moderately hard rock hardness, poorly to moderately cemented with silica cement (Weathered Bedrock; Unnamed 5andstone Formation) GCOFOIt[NSICS INC. 555 Pilgrim Dr.,Suite A, Eoster City,CA 94404 1-� �� ��l ��' 1 Tel:i415)3�9-3369 Fax: (415) 571-157S Log af Test Pit 2 NSOW—� . 0 � . � ° ��° O o � o g Depth � °�;°, �`�o 0 0 o � a (feet) �o� �` � Q Qoa � .., C ° p D ... '� itii � ° � �ii, • O`I"�ti 3 �'��„� 10 —— ——sharp contact ,,,,,,,�,��,,,..,.,,, gradational contact 1 Clayey �ilt, dark grayish brown, 2.SY4/2, slightly moist, soft to medium stiff, trace subangul�r to subrounded cobbles of sandstone and chert to 4 inches, ML (Fill) 2 �layey �Silt a�ad �ilty Clay, dark grayish brown, 2.SY4/2, to grayish brown, 2.SY5/2, slightly moist, stiffto very stiff, . containing lens of sandstone and chert cobbles to 6 inches, trace rootlets, low to medium plasticity, CL (Colluvial Soil) 3 Claystorae, olive, SYS/3, slightly moist, medium to moderately , hard, slightly fractured, trace carbonate veins and nodules alor�g fractures, trace rootlets (Weathered Bedrock, �anta Clara Formation) h � � G[OFOIZLNSICS INC. 555 Pilgrim Dr., Suite A, Foster City,CA 94404 �,�('j Q� �`� ��.2 Tel: (91S)349-33G9 Fax; (415) 571-1375 Log of Test pit 3 �--N75E 0 �i D epth (feet) S � � .�„�,, '��,,,�.,, �I��� 1 � O iI��1111 10 � '� � 'bag sample ��������„���,,., gradational contact 1 �iliy �lay, very dark grayish brown, 2.5'Y3/2, slightly moist to moist, soft to medium stiff, trace subround to subangular gravel . and �obbles of sandstone and red chert, moderately plastic, CL/CH(Colluvial Soil) 2 Cl�ystone; olive, SYS/3, slightly moist, medium to moderately . - . hara, slightly fractured, trace thin layers of interbedded siltstone,� trace carbonate veins and nodules along fractures, trace rootlets (Weathered Bedrock, Santa Clara Formation) ' � I GL•OFOHLNSICS INC, 5s"5 Pilgrim Dr.,Suite A, Foster City,CA 94404 Z.�(x �� �.5� P� � Tel: (415)349-3369 Fax: (915) 571-1575 Log of Test Pit 4 i , N14W--r 0 i: ,�, O .__. ���Ilill�Ii�lll i�lill�t��l�t11 t�tl`III�IiI1111t1��ti�itl111�111it I11111 llll.l� Depth � {feet) . � �, .. . C �illlll1��111�11i1illllll�ll!(�lt�l�1��111�����l�t��/��11111�1II1111tI1111L1t 111Iri ✓ O 10 � 6ag sample � ,,,�,.,,�,�..�,�,� gradational contact . 1 Salty �l�y, very dark grayish brown, 2.SY3/2, slightly moist, . medium stiff, trace subangular sandstone rock fragments to 2 inches, trace roots and r�otlets, trace shrink/swell cracks, base of unit defined by irregular light brownish gray 2.SY6.2 clay layer about 2. inches thic� CH(Debris Flow Deposit) ', 2 �i�� �lay, very dark grayish brown, 2.SY3/2, slightly moist, stiff to very stiff,-trace subangular�andstone rock fragm�nts to 2 inches, base of unit defined by inegular light browzush gray . 2.5�6.2 clay layer about Z inches thick, CH(Debris Flova Deposit) �, 3 �ilty Clay, very daric grayish brown, 2.5Y312, slightly �n,oist, very stiff to hard, trace subangular sandstone rock fragments to 2 inches, CH (Debris Flow Deposit) ' G[O�OkL•NSICS �NG 555 Pilgrim Dr., Suite A, Foster City, CA 94404 ��� �� ��� ��'j' 4 Tel:(9l5) 349-3369 Fax: (415)571-1575 Log of Test Pit 5 N27W--� 0 �1111111�1\��I�I��111���11�llt�il��lllO111�i1111111/1111� Depth ��„�,�,���,,,,,,, - (feet) � � � ... ^ Ll1��ulu��ilIII1��nIUnn1�������1�11<<�i�t�i11�11I�1�lui� J �/ �V ��:����������������� ar7.C13t10R31 COIItflCt 1 �ilty Clay, very dark grayish brown, 2.SY3/2, slightly moist, medium stiff, trace subangular sandstone rock fragments to 2 inches, trace roots and rootlets, trace shrink/swell cracks, base of unit defined by irregular light brownish gray 2.5Y6.2 clay . . layer about 2 inches thick, CH(Debris Flow Deposit) 2 �ilty Clay, very dark grayish brown, 2.SY3/2, slightly moist, _ stiffto very stiff trace subangula.r sandstone rock fragments to 2 inches, base of unit defined by irreguiar light brownish gray , 2.SY6.2 clay layer about 2 inches�hick, CH(Debris Flow j - Deposit) 3 Sil#� Clay, very dark grayish brown, 2.SY3/2, slightly znoist, ' very stiff to hard, trace subangulaz-sandstone rock fragments to 2 inches, CH (Debris Flow Deposit) GLOFOIZLNSICS INC. 555 Pilgrim Dr.,Suite A, Foster City,CA 94404 I,�('j Q� �'�j' �j'j' S Tel: (415)349-33G9 Fax: (415) 571-757S Log of Test Pit 6 ; ; N42E—r � 0 ��i Depth {feet) � � ' _' � ��� , ����,,, �'�"',���„ � �� 10 e bag sample �,��,��„����<<��<<� gradational contact 1 �ilt� Clay, dark grayish brown, 2.5Y4/2, slightly moist, stiffto hard, homogeneous color and te�t.ure, trace roots and roottets, trace fine shrink/swell cracks, medium plasticity, CH(Colluvial Soil) 2 �ilty �lay, yell�wish brown, 10YR5/6, slightly moist, very stiff �'I to hard, trace subrounded gravel to 2 inches, medium plasticity, I CH(Weathered Bedrock, Santa Clara�ormation) I I ', GeoF OKLNSICS INC. I' 555 1'ilgrim Dr., Suite A, Foster City,CA 94404 I,�� Q� �'r �� � � Tel:(415) 349-3369 Fax: (415) 571-1S7S ; � COTTON, SHIRES AND ASSOCIATES, INC. CONSULTING ENGINSERS AND GEOLOGISTS . Noveinbec 25,2011 C5x51 TQ: Colin Jixng iPl�nning Deparhnent ; CITY OF CUPERTTNO 1�300 Torre Avenue CuperHno,C�liforxlia 95014 SUBJECT: Geotechnical Peer Review RE; Proposed Single P�inily Residence 2T740 Rainbow Drive I At your requesfi, we have completed a geotecltnical peer review of the permit II application for�new residence using the following docurnerits: '�, • Geoteclulical Investigafiion (report), prepared by Earth Investigations Consult�nts,dlted October 25,2011; • Architectural Plans (10 sheets),pxeparer not uidiclted, dated Octaber 25, 2011; and I � I • Grading and Drainage Plans (4 sheets}, prepared by Nordic Engineering Inc., dated October 2011, - In addition to tlle above referenced docunnents, we h�ve reviewed pertinent techtizcal dlfia from our office files�nd performed a recent site reconnaissance. DISCUSSION The referenced documents uldicate t11at tlze applicailt proposes to construct a new ', two-story residence with parti�l basement on an undeveloped property just east of the i existing access roadway. Access to the pxoperty is provided by this paved road in the northern portion of the pr.operty, which extends southward froin the end of Rait�bow I Drive, a11d services one otller pro�erty jusi soufll of the subject property. i In our previous review repoxts issued as part of the subdivision �ppIzcation review ; in 1998, we expressed concerns regarding the construcHon of the access roadway, We antended to confirm thlt lhe proposed roadway �was to be tounded oi1 competent bedrock I, Northern CaliforniA OfEi¢e Centcal Californi;t OfFice 330 Villagc L�nc 6417 Dogtown Ro:td I Los Gatos,CA 95030-7218 San Andreas,CA 95249-9640 ' (408)354-5542 •Tax(908)354-1852 (209)73G-4252•Fnx(209)73G-1212 ' www.cottonehires.com � 97 � . Caliil Jung Novcinbez�25,2011 I'1ge 2 C5151 xnaferi�ls. We also recommended fhat siEe debris flor�v hazards be ev�lulted and initigation recommendations be provided, SITE CONDITIONS ' The proposed build'ulg site is charlcterized by rnoderahely inclined (8 fo 15 degree '� inclinafiions), west-facing hiliside topography, The residence is to be located near the axis i of a inoderately steep to steep dravlage charu�el. This drainage channel cont�ins � x•elatively broad, open bowl �long the uppex� relches of tlte drainage are� where several moderate-sized landslides have been rnapped. These landslides are locafied on steep slapes, and contain well-defined headscarps up to 10 feet in lieight, and prominent toe fe�tures. The presence of shallow and inoderltely deep landslides on the steep upper slopes flanking the cent�al dr�inage channel results in the potential for this cha�mel to convey debris flows, Establishmenfi of fihe existing paved driveway h�ve 'vlcluded construction of retaining walls along portions of the driveway 1lignment (upslope and downslope sides of the road). We observed abundant�sphalt cracks in the roldway up to nearly 0.5-inch wide. The proposed new residence is to be located rn ihe southern portion of the properfy just �i north of the drain�ge charulel axis, Drainage at the site is characterized by convergent ' sheetfiow directed toward t11e south, southwest, west, and northwest where ifi is focused into the west-flowing drainage channel in the center of the property. The site is underlain, at depth, by sedimentary bedrock materials of the S1nta Clara Formation (i,e., semi-consolidated conglomer�te, sandsione, and potentially expansive cl�ystane). 'These bedxock materials are overlain by shallow colluvial soils along the ridgefiops and thicker colluvium and l�utdslide debris along the steeper flanking slopes and within the axis of fhe drainage channel. Active laYtdslides, soil creep �nd deep erosion rills �, were observed along the northern slopes below the lccess road, Active deep se�ted ', landsliding was also noted in upper portion of the drainage near the crest of the ridgeline. ' The City Geologic and Seismic Haz�rds Map ind'zcates that ridgetop areas of the site , are located within an"H" zone, which is defined as:hillside areas containing modernte to steep ', slope conditions zvitli an undetermined�atential for slope instabilit�. The upper slopes below the �I ridgeline 1re within �n "S" zone, which is defined 1s: "Area including all recognized landslide �,, deposits,and steep walls of Stevens Creelc Cnn�on, witlz a madcrate to high landslide potentin!undcr , static or seisntic cor�ditions. Tl�is nren also reflects the tnapped zone of potential enrtlTqur�lce-induced landsliding pr•epared b� the Cctlifornin Geological Surve� (2002)." The property is lac�ted approxiinately 1,500 feet southwest of the potentially active Monta Vista flult and I f1 approximately 3 rniles northeast of the�ctive San Andreas �ult. �i i , COTTON,SHTIZES AND ASSOCIATES, TNC. i I 98 Colin Jung November 25,2011 Page 3 C5"151 ', CONCLUSIONS AND RECOMMBNDED ACTIDN � The subject property is collstrauled by landslidulg (sh111ow and deep) along lhe upper northern and southern slopes, existing ariificial fill m�tterials with the �otential far � settlement 1nd creep, potentially expansive surficill soil material, surficial soi] cr�ep, thick colluvial soil deposits on steep slopes a11d within the draulage axis that m1y generate debris flows, and the susceptibility of the site fio very strong seisrnic ground shaking. The ProjecE Geotechnical Consulfi�nl•has perfornned 1 geoiechnical investigation of tlZe property, I includuig surficial geologic mlppi�lg, subsurface exploration, and laboratory testing. The ! consultant has recagnized the existing landslide deposits i�1 the upper reaches of the !� ; drairilge channel, 111C� I1�S recommended thlt debris flow protection rneasures be , implemented as plrt of the site development. The consu1ta11t has recornmended that � j minimum 4-foot high deflection wall be constructed along the upslope side of the ', residential development to mitigate potenHal debris flow impacts. In addition, the Project ! Geotechnical Consultant has 11so recommended that the resideYtce be supported on 1 pier and grade beazn foundation system, wifh mutiirnum 16-inch diameter piers exiending a minirnum of 12 feet below ground surface. Our review of the subsurface explox�ltion reveals that the southern portian of ihe proposed residence is located on nearly 15 feet of slopewlsh deposits/colluvium, and thus, 12-foot long piers will 11ot likely encounter bedrock. Ifi appears that cixrrent design i xecommendations could result in a `rnixed foundation condition', where tlte upslope portion of the residence is supported on bedrock and the sautllern portion is founded wiihin slopewash depasits, Supportzng a residence on a mixed faundatian condition in liillside terrain or in colluviums is not consistent with prevailulg standards of geotechnical � practice. We also note fihat the driveway entrance contains large longitudinal cracks, and shallow landslides are loclted downslope of the driveway across from the proposed location of the residence. Consequently, the stability of the drivewa�should be evaluated and addressed by appropriate remed'zal design measures. Prior to geotechnical approv�l of the szte developmenl perinit applicltion, we recornmend ti�at the ProjecE Geotechnicll Consultant perform the following tasks: 1, Su��lementll Geotechnieal Design Criteria - The Project Geotechnic�l i Consultant SllQlllC1 pTOV1CIe fpLlriClc�flOri design recommendations that include supporhing the residellce UI11�01•mly on competent bedrock matet�ials. At a minirnum, tlle followulg items should be�ddressed: COTTON,SHIRES AND ASSOCiATES, INC. 99 Colin Jung NovemUer 25,2021 Page 4 �7�� • Recon1me11ded foundltzo�l design criteri�t should be cl�rified to ensure that the residence is uniforinly supported on bedrock with an acceptable �I einbedinent. i � • The geotechnicll consultant should evaluate the roadway cr�cking, , � considering Iikely c�uses, and provide recominendations to assure a stable j roadway. i I � • Proposed debris flow wall criteria includes designing for an active imp�ct load of 85 pcf equivalent fluid pressure (EFP), The consultant should � consider increasulg tl�e recommended impact design criteria, unless these i, walls are to be designed as deflection walls wherc ll�ey �re oriented at �n oblique angle to the anficipated debris flow di.rection, Typic�l design impact laads for debris flow w�►lls is 125 pcf EFP, I ! Appropriate documentation to address the lbove should be subinitted to the City for � review by the City Geotechnical Consultant, � 2. Geotechnical Plan Review Includiztg Debris Flow Mitigation - The ��� Geotechnical Consultant sllould evaluate current site develop�nent plans �nd assure that these incorporate project geotechnical design criteria including appropriate recommend�tiox►s for debris flow mitigation. Thcse evaluations should 'znclude,but not necessarily be]imited to the fallowing: • A deflecHon wall is currently plaruled to protect the proposed residence with � a minimum height of 4 fcet, The geotechnical consultallt should ��eview the wall layout and deter�nine if the proposed mitigation design satisfactorily addresses the anticipated debris flow h�zard at the site (i,e., the depth of anticip�ted debris, the �nticipated debris flow volume and velocity, and the location and orientation of the wa11 with respect to the debris flow direction). The results of the Geolechnic�l Plan Review ulcluding Debris Flow ifii ation should be submitied to the Cit for review and a roval b the M g Y pP Y City Sfaff prior to approval of Building Perinits, . LIMITATIONS Tl1is geotechnic�l peer review has been performed to provide technic�l �dvicc lo ; ' assist the City in its discretionary permit decisions. Our services have been limited io e documents reviousl identified, and a visual review of the property. Our • ie of th iev w p y ' sions are xn�de uz lccordaizce with ener�ll acce ted rinciples and opinions and conclu g Y p P COTTON,SHIRES AND ASSOCIATES, YNC. 100 , I i � „ Colin Jung NovemUex•25,2011 Page 5 C5151 practices of the geatechnical profession. This warranty is in lieu of all other warranties, either expressed o��implied. Respecifully submifited, COTTON,5HIRES AND ASSOCIATES,INC. CrTY GEOTECHNICAL CONSULTANT I � �--�' __" � � Ted Sayre , Prulcipal Engineering Geologist CL�G 1795 , , � � I �����`G� David T,Schrier , Prulcipll Geotechnical Engineer GE2334 TS:DTS:JN I . I � i . I �I COTTON,SHIRES AND ASSOCIATES, INC. 101 ' I I � • � • MAR 2 3 2U BYv C��� (� � REPLY tp GE�TECHNICAL PEER REVIEW Prapased Residential Develc�pm�nt 2174C1 Rainbow Drive � Cupertir�o, C�liforni� Prepared for: . Haliday Driv�, LLC c!o Mr. Barre Bames 2175 de la Cruz Boufe�a�d, Unit C Sanfa Clara, Califami� 95D5Q Dated: March 16, 2012 Joe 2a1 o.a2.oa Earth Imestigatic�ns Consuttants P_�. Box 795 Pacifica, California 94044 Phone 650-557-0262 Fax 65b-557-0264 earthinvestigations�comG�st.net 102 Earth Investigatians Consultants March 16; 2012 Jab 2410.02.00 Holiday Drive, LLC cla Mr. Barre Bames, President 2175 de !a Gruz Bou{evard, Unit C Santa Clara, Galifornia 95050 RE: REPLY TO �EQTECHNI�AL PEER REVlEW Proposed Residential Developrnent 21740 Rainbow Drive Cu�ertino, Califnrnia Dear Mr. Bames: INTR�DUCTi4N Pursuant to yaur authorization, we have pre�red this reply to the follawing three geotechnical aspects of the proposed projeci commented on by Cottan, Shires and Assoaated, inc. in the geotechnical peer re�iew letter dated November 25, 2011 {CSA, Jab C5151): �. Recammended fvurrdafion design crrteria should be claRfied fo ensure that Fhe res+dence is uniformly supported an bedrock with arr accepfable embedment. 2. The geotechnical consulfarrf should evaluate fhe roadway cracking, considering likely causes, and pravrde recommendafions to �ssure a stable roadway. 3. Propased debris flow wall criteria iRdudes designing for an active impact laad of 85 pcf equivalent fluid pressure (€FP�. The cansult�nf should cansider increasing the recammer�ded impact design criferia, Ul7IB55 th�S@ walfs are fa be designed as deflection walls wnere they are orrenied at an obl;que angle fo the anficipated debris flc�w drrection. Ty��c-��Iy design �mpactloads fordebris flow walls is �75 pcf EFP. Geologists & Engineers P_O. [iox 795 •Pacifica, CA 9�{044 �(650) 557-0262 •E.Lr(650) 557-026�4 103 Mr. Bames March 1�, 2012 Jab 2410.02.00 Page 2 This reply foilows aur Qctober 15, 2011, design-level geoteehnical report for the proposed projeGt, located in the Ragnart Creek watershed (Piate 1, Vicinity Map), ; In addition to review of the data presented in the report, we conducted the follawing supplemen#al scope af services:. • Review of pertinent geolagic reports and pertinent parts of the roadway impravement plans you pravided subsequent to submi►tal af c��ar geatechnical report. Excerpts pertinent to reply of the roacfway and storm drainage are contained in Appendix A. Plate 2, Engineering Geolagic Map illustrates the entire alignment and the revised understanding af roadway storm drair�age outfall focaiian; � Supplemental engineering geologic reconnaissance mapping of the slope bel�w adjoining the downslope side of Ftainbow Drive; • Drilling of 2 bonngs at the top af the stope adj�ining the west side of I Rainbow Dr+ve (Plate 2, flight auger). The bo�ings were supervised, logged and sampled by our field engineer on January 31; 2012. The � approximate location of the borings is depicted an Plat� 2. Plates 3 and 4 I, cantain the Logs of Bo�ings, and Plates 5 and 6 pro�ide descriptians of the ' terms and symbols in the logs. Relati�ely undistu�bed earth materiaf encountered in the auger borings were retrieved at selected intervals with modified Califomia and SPT split-spaon sampler. TY�e number of blaws to drive the respective samplers 18 inches with a 1�4pound hammer free- falling 30 inches from a cathead and rope arrangement were recorded on the logs at the respecxtive samp{e depth. The blc�w counts t�bulated on the logs are SPT values (multiplied the fieid values by 0.6). • Supplemental debris flow hazard analysis; � Geotechnical �nalysis and prepa��tion af supplemental parameters. �I REPLY TO PEER RE1lIEW CQMMENTS The following is our reply to comments in the arder presented in the CSA peer review letter 1. Boring (ogs presented in the project geotechnical report indir�ate the praposed house foundation ar�a on the steep hil(side is underlain by mvre than 23 feet vf inedium dense to very dense gra��lEy, clayey sand alluvium of the Plio-Pleistac�ne Santa Clara formation, which is mantled at the Boring 1 location by appraximately 2 fEet of modern calluvium that would tend t� thicken lawer on the slc�pe {Photo 1). The portian of the house foundation on the gently sloping valley floar is underlain by approximately 2a feet of stiff to hard, fine-grainec�, late Quatemary sl�� wash (aNuvium} that rests unconformaaly on soft Santa Glara claystone. Earth lnvestigations Consultants 104 Mr. Barnes March 16, 2012 Job 2410.02.OQ Page 3 The ir�terpretative cr�ss section depiets inte�ngering of approximately 10 feet of colluvium with the rel�tively thick pile of slope wash deposits at the toe of the steep slope. The geometry of this relationship, based on the proj�ctian of the top of the Santa Glara formation between Borings 1 and 2, suggests that lacally the recommended minimum pier depth of 12 feet below the ground surface wili offer only a coupfe of feet of penetration inta the stiff to hard slope wash deposit foundation support mat�rial underlying the rolluvium. From the boring data, it is our opinian, the slope wash deposits underlying the gentle valley floor will provide satisfactory foundation support, as the blow counts and dry densities tabulated on the boting log indicates the slope wash depa�its exhibit strength comparable ta the underlying Santa Clara claystone. We will during pier dri{ling assure that the piers have at least 10 feet af penettatipn int� the g�anular bedrock underlying the steep hillside, and the stiff ta hard slope wash depasits underlying the gentle valley floor_ Henr.�, we anticipate the pier depths will range from a minimum of 12 feet on th� hillside to �0 fe�t in ifie valley fl�- � 2, The roadway asphalt pavement contains a discontinuous array of what we I characte�ize as relatively fine langitudinal fractures that parallel the rasdway alignment across the site frontage �Photo 2; Plate 2). We '� abserved an appraximately 3- to 4- foot long, ovate depression in the pavement adj�cent ta the curb (Plate 2). 7here is an intact approximately 130 foot lang concrete retaining wall supporting the western m2rgin of the roadway. There is a piping void exhibiting an approximate cross-s�ctional area of 5 to 6 square feet that extends from beneath the tae of wall and adjoining roadway section near Boring 1 (Plates 2 �nd 9j. The s{ope adjaining the west side af the roadway is marked by scarps and irregular topography from shallow debns slides we judge are refated to und�rcutting of the banks of the ephemeral channel by a�rrently inactive storm water disGharge from two corrugated, high density polyethyiene pipes (HDPE, Plate 2)_ You indicated that there are r�o as-built geatechnieal documents pertaining to roadway development available in the City files, but that it was permitted and inspected by #he City. From the improvement plans you submitted, it is evident that design was with respect ta geatechnical recamm�ndations in the 1998 Geoforensic's report. Plate 2 and P1ate A1 depicts the 1998 roadw�y improvement plan, including the r�taining w�ll across your praperty. 7Y�e roadway section tlepicted on Plates A2 through A5 cafls for 959�o campaction of the native soil beneath 8 inches of Class 2 aggregate baserock beneath 2 � inches af asphalt supported by fill. Baring 1 encountered up ta 1� feet of firm ta stiff, sandy clay fill supported by claystone and siltstone bedrock (F�late 9, Generalized Gr�ss S�ctions Earth [nv�stigations Cansultants 105 i Mr. Bames March 'f 6, 2012 Job 241 QQ2.OD Page 4 I ' A-A' 8� B-B'). 6aring 2 enoountered appraximately 7 feet of soft to very stiff fill overlyir�g approximately 17 feet of stiff, silty clay slop� wash, Bedrock comprised af clayey; gravelly sandstone and pebble conglomerate was encountered at a depth of 24 feet. f;raund water was not encountered, nor was there observed evidence of springs on the adjoining slope. The soils encountered in th� barings were g�nerally damp. � Plate A6 depicts the detail for the retaining wall, supported on 8 'r4-faot long, 18-inch diameter piers to support the edge of roadway. Twa by tweive, redwood headers were cal{ed far an th� uphill side of the roadway to mitigate seepage of runoff under the pavement. Roadway storm drairtage outfall was shown to exte�d west of the end of.Rainbow Drive to discharge anto secrete erosion-protect an the bank of Ragnart Cre�k � (Plate 2 and A7). �rom the above, it is aur opinion th�t th� fractures in the roadway are I �elsted to subgrade failure and not global instabihty, Failure can I�e attributed to poor surface runoff control and absence of redwood headers � on the uphill side of the pavement section. This condition allaws for rainfall runoff to seep into and weaken the pavement section. We � recammend that the redwood of plastie headers be installed on th� uphifl ' margin of the roadway section. Capacity and sl�pe af the �djoining earthen swale should be enhanced to the extent practical or cancrete line� '� to improve surface �unaff. During rr�adway restoration, we will �valuate subdrainac�e requirements an the uphill margin Qfi th� roadway as a measure to mitigate seepage o� the uphill side af the roadway section (refer to fa�,ndation subdrainage we recommend in the geatechnica! report). The piping void extends ��neath the pavement sectian to the location of , the depression. The void is large enough to indicat� erosion could be ' d�rectly related to water under significant pressure. 7'he utility trench �� containing two water service pipes is in the location of the piping void and '�, pavement depression. We recommend that the water senrioe and other undergraund pipes that convey water be inspectedltested far leakage. It will be r�ecessary ta removelreplace the pavement section �nd weak subgrade soil in th� area of the piping void and pavement depression. Grading recommendatians in our geotechnical report should be applied ta the repair_ For the fractured pavement, consider an c�verlay to mitigate accelerated deterioration from surface water infiltration. It is our opinion that the canaete retaining wall at the top of the roactway embankment is susceptible to undermining by surficial landslide Earth Investigations Cansultants 106 Mr. Barnes March 1 fi, 2012 J�b 2410.02.00 Page 5 retrogression. The design detail on Plate A6 catls for piers to e�end only , $ '/ feet belaw the wall base. We infer from the surFaoe morphology and boring data that the relatively shaltow landslide enc�roaching on the wall is ' vn the order af 5 to 6 feet, leaving the tips of the wall foundation piers only ' 2 'h feet beiow the unstable soil. Therefore, we recommend that a new ; soldier beam retaining wall be installed in front of the concxete wall to augment lateral suppart ta the roadway section_ We recommend that the piers for suppart of the new wall have a minimum diameter of 18 inches ; and an edge-to-edge spadng no greater than 5 feet. Piers should extend at least 18 feet deep. The upper 6 feet of the pier should be assigned a lateral creep load of 65 pounds per cubic foot acting vver 1 '1� diameters. Other foundation and retaining wall design parameters offered in the geotechnical report are valid for design of the new wall. 3_ Plate 10 depicts the anticipated debris source area constraining the site. The arcuate hollow upstream of the �ite is generally cor�sidered to represent the sauroe of probably exter�sive debris flow activity in the geolagic p�st (i.e., late Pleistocer�e) that formed the thick section of slope wash deposits extending ta Ragnart Creek, Approximately the upper 5 feet of slape wasfi e�osed in Geof�rens'res' (1996) Test Pits 4 and 5 was interpreted as a successian of 2, 2 to 2 '� foot thick, medium stiff ta very stiff, fat clay debris flaw deposits mantling a similar, thicker deposit_ From aur investigation, we judge the potential low for debris fl�ws greater than 3 ' feet reaching the propased hause site, low given the anticipated trajectory �, of a potential d�bris flow, lack af cvnfinement offered by the intervenin� ' relatively flat channel, the necessary travel distance of at least 95 f�et between the toe af #he ridge fiank, and highiy cohesive soil that has comprised past det�ris flow deposits enc�untered in the explorations. It has been reported that debris deposition occurs rapidly at the toe of a steep slope (Howard and others, 1988), We abserved at the site, and it was reported earlier by Geforensics {1g96) that runoff has been limited by the oak trees on the gentle slope upstream of the proposed house �ite. It is our apinion thaF design for an active pressure of 85 pcf is more than sufficient for the relative position of the house. An impact laad of 125 pcf is considered an appropriate d�sign parameter for impact protectia� at the toe of a steep slope or canfined channel subject to generally low-�ohesive soil debris flow activity. Nevertheless, we intend for the wall ta act as a defl�ctor ta allaw any pvtentia! debris in the future to be easily accessed for remaval and reestablishment of positive runciff across the site. The approximately �-foot high earthen berm oriented askew to the property line (Plate 10} shauld be evaluated for rema�al or r�configured and � integrated with the wa11 with an orientation parallel to the property line to optimize c�nveyance af Plate 10�. I . Earth Investigations Consultants 107 Mr. Bames March 1�, 2p12 Job 241 a.o2.00 Page 6 SUPPLEMENTAL SERVICES We shouid be given the oppartunity #o review the final foundation, gratling and drainage, and debris flaw mitigation pfans far conformance with the intent af aur recommendatidns. During construction, we should obs�rve the rough and finished grading operations, foundation exc�vatians prior to steel placement, and the installation af all drainage facilities priar ta burial to ascertain th�t our rec�mmendations are followed. Upon completion of the project, w� shauld perform a site observation and report the results of our work in a final repart. These services are outside the present scope and will be billed �n a time and materials basis, in accc�rdance with the fee schedule current at that time. These servioes will be performed only if we are provided with sufFicient notice to perfarm the work. We do not accept respansibility far items that we are not notified ta abserve. We reoommend that the Qwner be responsible for notifieation, na less than d8 hours before the requested site visit. INVESTIGATI�N LIMiTATIQNS °fhis report has been prepared in accordance with generally accepted geotechnical engineering principles and practices, and is in acaardance with the standards and practices set by the geatechnical cansultants in the area. We ; offer na warranties ar guarantees. I Subsu�face conditions could vary between those indicated by the test b�rings , and interpreted frorn surface features. A representative from this office should be present to pravide consVuction abservation services, to observe the exposed geatechnical conditions, to modify recommendations, i� necessary, and to ascertain that the project is constructed in accordance with the recammendatians. This report is submitted with the understanding that it is the responsibility of the II Client {Owner) to ensure that the applicable provisions of the recommendations I� contained herein are made known to all design prafessionals invalved with the project; thai they are incorparated into the �onstru�tion rirawings; and that the necessary steps are taken ta see that the contractor and subcontractors carry aut such recommendations in the field. � If conditions different from those described in this report are encauntered during �� canstruction, ar if the praject is revis�d, we sh�uld be natified immediately so that we may modify our recommendatians, if warranted. Eart6 Investigatlons Consultants 108 Mr. Bames March 1fi, 2012 J�b 2410.02.00 Page 7 The practice af geotechnical engineering changes, and, therefor�, we shauld be cansulted ta update this report if canstn.�ction is r�ot performed within 12 rnonths. REFERENCES Baldwin, J.E., II, Donley, H.F., and Howard, T.R, 1984, On debris flowla�alanche mitigation and contral, San Francisco Bay area, California, rn: Gosta, J.E. and Wieczorek, G.F., (eds.), Debris flows/avalanGhes: Frocess, recagnition, and mitigation: GeQlogical Society of America, Revi�ws and Engineering Geology, Volume. VII, pgs. 223-236. Geafarensics, Inc_: 1996, Geotechnical investigation, tw4 proposed residences. lands af Rainbows End Estates, Inc., Rainbaw Driv�, Cupertino, Califomia: , Geotechnical consultants repart, Job 9631122 pgs with illustr�tions. �, Haward, T.R., Baldwin, J.E., II, and Donley, H.F., 1988, Landslides in Pacifica, '�, caused by the storm, in Landslides, flaods, �nd marine effects of the storm of '� January 3�, 1982, in the San Francisca Bay region, Califarnia: U.s. Geological I Survey Prof�ssianal Paper 1434; pgs. 163-185_ The following photos, plates and appendix are attached to oomplete this re�aort: Photo 1 — East�rly clase-up�iew of proposed building site_.. PhotQ 2— Southwesterly �iew a{c�ng end of Rainbow Drive ... Photo 3—S�uthwesterly view�f intact retainir�g wall.., Phota 4— Ncxtheasterly view af debris stide scarp ... Photc�5— N�rtherly view of Rainbaw Drive drainage ouifall... Plate 1 —Vicinity Map Plate 2� Engine�ring Gealogic Map Plate 3 — Log of Boring 1 Plate 4— Log af 8oring 2 Plate 5— Key to Barings Pl�te 6— Rock Hardness Criteria Pl�te 7 — Plasticity Chart Plate 8— Unconfined Compressive Strength Test Plate 9— Generalized Cross Section A-A' & B-B' Pla#e 10— Debris Flow Evaluati�n Appendix A— Excerpts (7 pages) of Rainbow Drive improvement plans. Earth Investigations Consultants 109 i Mr. Bames March 1fi, 2Q12 � Job 2410.02.0� Page 8 We trust this repvrt provides you with the information you require at this time. Please cantact the undersigned if you have any question�. `��P C r_�,, ', ,,�._; - y�--��� �� fYAI.d�.� �Fti Ver�r trul yours, :� ti' ''%'�: '� �"a`rth Inv tigallons Co�sultants �����N� EG�'►32_' `i CERiiFE�n � � ' � __- - � E�l,GIT�EtR�^!C� I ----��---^-- �E��aGtisr �- `�/ ,r,. ;-- Joel E. Baldwin, II x=�� �r �"�,��"��' Principal Engineenng Geolagist (renewal date 2/28/13} Q�,OFE551p �tl��`���W•�`fiZ �� � � � � �� � � I c�'Gr�a'c �l/"� �JG+� �-+� �j w rn / � �9 ?a �� � David W. Buckley � * * Civi� Engineer 343$6 {r�newal date 9/30113) `��'y�QC.'nn�y���,a`�' .-�� JEB:DWB_lb:gi Qistribution: electronic copy and 3 bound copies ta addressee i Earth Inve9tigations Consultants 110 � � � ••*r,.,,,. � � �r:-=� � � � .?: � ,� - - .t� . , «,���. . .. r. _ ,� � � � , �i - - y^ Ir �� =�, .��.7' .1.�,.11 1!�,��,� . , �a`�.+ - c' i�'� !f�� 1 w-!d'�• .3 ,�:.i jY! .. Y�ifs�7'.` ..,� �, �' � � .. }lr': "�*5 � ' °Aii"•� �N�'-i� Ir' � ,�A."�� ' � ' ��� jr:�� �'•�M6y, � �,_ � � � w '�� .. ��c• . t � ''SF, l:�E'iiih''r � `;J - ' '. , ..• �'��;• . r� � •� � � ,.al�,.�l; r .A ��w � .. �R� � �, � �5•� . . "'T���. r 1}r . .� . . ,. :. .{�I �M'�' ' q .: ' . + �e t .dr"� � �� - �� � 't'�� �,yS1 �� .K� r�:� ', � �"'i� �: . ` . R +� ,�' Pt.�i��,r �,' ' . 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Cobbles in the Santa Clara formation form irregular hillside surface of hillside to right above proposed building site. .:p., ^:n ��r• ' 'ti'►�,�, �„.,�,f, �, � �1. :� �. �1��� . .. . . �- `��i: � ��,. � r�- .- -r �'.. 1' !:W�� :�,,��'�:c��-�::x �'' s,.:� �,",i� :,, i�.".. wTtiI ' . a�.��„� .+-� � � rt��'w, � ' . .. .,�ti.��./I:i?�r�� �; ^ i � '�ti���,�. �M 1. y�.. ��, n._ � '� y'�' ...r . �y t , �p a#� :.:N .�.^ n.� .,'W � . . . � .`�a-M�,'.� � _ 'Y +�,f '. '��. - .. _R�. �,*. , . ;� p�� � . ��-�r,� _..«y�� �r..�—s�^'� ..-. , .. fi�r:!n"?,y.. .. - . ... ��� , _. �:',�,,,,�� . K`. �'47�.. .a...�A' .�e:y� .. `�(.i' - :rfX`OT,eJfl � �.{i"'��' 1 j'.. ' �� �� � `��. .� f', �R'; �.� � ''.•. .��. � ' . a�. .��» r`� ." . �w` r:� '�3 M . '.. . .4 *�` �Mi-aTa'- . � . � .�. r��... ` i,��. . � _ k �i.!��. � �y�-i .�6t' ��y� �V'i y i''. � . 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U.S.G.S.Topographic Mop Scale Cupertino Quadrnngle,7.5'Series(Photorevised 1980) Contour interval=40' • 2410.02.01 VICINITY MAP Plate Earth Investigations Consultants � 21740 Rainbow Drive 1 3/2/12 Cupertino,Califomia 1 116 � _., .__ :f 11 ' .4� . � � . �_— � �.. . ' . ' ' — --_— / � ' G?:-J.' � f F " . ' ' . —,�__. I� J ���s o!�� y� �� 1 , Storm dfain to Rognort Creek(see Ghoto 5)�' .�---�-^--'�— ~-^ � G2C y / > ' -�--��-'_' � �= ,r��: _ /(T r /Qsr /"�r �f iil' ' ,4 e�' � ' .�� . ' . .{..� . . , ��` _ / �/ '"%�—' p� i ,S / l. i .� . . . � �� . T / f��` .=3.�s` " /J� , , Q� �-___ , ,,, "-a �\~ ..L• __ � ` ��� '�� / ���j a�� � ,� � �zr=e A �o�� � � �.� w 1 ��� -�, � T- � , , � r t � . `,� �, .�t�"�► ,;� � �"� / r�� ,:. 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I {`� ,� ,- y.`"���,"� `� _; �PiPiI1J VOid ~�'`•^ �J�� I � mavemcnt d�rection;single arrow is debris slide; i i�� ���T p� �� " ' � � _ �"���I� ��% �' ` �.� °�. �_,� �B_1 - �`��„y;�- � , l_V � hochures�ndicate scarp;dash line is inferred cantac � ' �r�Z� , , t�tt I u: `� j .: _ .i DirtRoadj �',�.::_- �, �.,� •` -=' IF�S�� �j���. �i+� I�` ;jl il �,`_� 'C; � �-� .ti- _.��� > Gullyerasion;dashdotisdirectionofseasonalrunof }�I';�L J71 x I'N {�� � Il . � //%- � �''C�,�j� PI�OPOb�E�i:��, `... \ L �... � ' � -� � t�� - _`J Puvement froctures �;,� ,,;' �ra� . , ' 'n �;. �r/ �� l -- o af ~� < <-.�\ -v ��d � � B 14�i{1 .�rJ -'�I.' n�Ll� �7 �\�� . .~�g0� \\ ' _. *�..'i� lY`�,� ., �`-.,` � Depressioninpavement (1 �� i_. ��. ���� ± r,,,,�, `-J- � a � O .�GIP-2 n -�s� - � � p � ��_. 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'� � i I�j, �" -�o\ . `'�,4�".,,� ._ --�� C`���-f -� � ...�F- ,�t�..,;, } �� I,. .D���B-z . `-� G-. _ �'`.\ \� �„ y4,� tM1, GIP-3 qPProxlmate GeaForenSics Znc.testplt C '� ' ('� I�y. , I. �� �>, ��.'�,�;- �� location(1996) � ' �. ; rt i: 'I,��7' , - k, �..�,��� I f �- ^ r'; %'�: �'fI'' Q��QTsr\ ' �„ j' -, r y�'i� �'"t7 ���r TCPB-1�- qPproxlmateTCPboringlo<ation(1991) j � �a � `%.�` ��..,�X.., � !,t _. /� tj j 4' q ' yl,,, \. ��` _ , t� � - ��� � JCPTP-4 APProximate JLP test pit lacation(1989) k r� l'� ��;1 � �_ ' ' ���� _� q q, � �� �- p �.` , _.�.� �, �;:('� _ � �- . .. � - . , �� Line of cross section A-A' + . . �1. .. - ` ��i 1 � . . . I+ B_2-�-. ° s`°ie zo f+. ` .G'� .'� Earth Investi ations ENGINEEWNG GEOLOGIC MAP PIBtA . _ . � � . 41,r' Lontour intervul=5' � '.���i� � �a'�d -�--- -- � '- �' %! f��;ti� Consultants p� 3���Z 21740 Rainbow Dme 2 � ._.. Base mop fram 6luliani&Kull,Ina(10/12/1998) . �v ' Cupertlno,CalNornle � -- � � � BORING 1 � � � Track Mounted Flight Auger BlowslFoot a �n � � �S� � � pey� �648' p� 1/31/2012 0 � Dark brown,Snndy CLAY with alternating,wavy ! subhorizontal Inyers of soft to firm Claystone/ 'I Siltstone clasts,very damp,firm to stiff I I I-I C� (ACTIVE LANDSLIDE) ' 1—i ' 17 I 5 I I_.I Dark brown,Sandy CLAY with alternating,wavy i subhorizontal layers of soft to firm Claystone/ Siltstone closts,very damp,firm to stiff(FILL) CL � � 10 111.5 16.5 26 Q- p Yellowish brown CLAYSTONE/Clayey SILTSTONE, with fine Sand,very wenthered,occasionol fractured,soft,massive(SANTA CLARA FORMATION) 15 � _.i_._. I ill I 117.7 14.4 50 �- ROCK '' ��_I_I_. I_._I_I_I_I 20 II 113.0 16.9 57 � � Terminated at 22 Z' � � — I I � '� � � � ❑ I I I I I . 24,°.°2.°, LOG OF BORING Plate Earth Investigations Consultants � 21740 Rainbow Drive � 3/2/12 Cupertino,Califomia 118 � � � � BORING 2 � � �y,ip„,,,� Track Mounted Fli hq tAuqer � Blows/Foot Q �n � �S� � � peY� �648' p� 1/31/2012 i � � I Dark brown Snndy CLAY with 6ravel,damp,soft, I plastic(FILL) , I CL 101.1 10.1 16 5 I I dry,stiff to very stiff Yellowish brown and light olive brown Silty CLAY, contains some angular to subrounded Gravel, $ domp,stiff,very plastic(SLOPE WASH) � 10 13 � 0 15 � i-j CL 17 I I I �—-- i I 20 I 114.9 14.3 17 i � Olive g�ey and very dark brown Clayey 6ravelly ROCK SANDSTONE and Pebble CONGLOMERATE,very 122.6 8.1 38/3" - weathered,closely fractured,soft to moderately hard,massive,trace of caliche(SANTA CLARA FORMATION) � Terminated at 26' 3" � a � a� � i � � ' I I �I . 24,°.°2.°, LOG OF BORING Plate Earth Investigations Consultants 21740 Rainbow Drive /1 � 3/2/12 Cupertino,Califomia `'t' 119 ', Primary Divisions GROUP Seconda Divisions SYMBOL ry J GRAVELS CLEAN Well graded gravels,gravel-sand mixtures,Iittie or no fines. � Q GRAVELS �'W Q w°o MORE THAN HALF (LESS THAN 5%FINES) GP Poorly graded gravels or gravel-sand mixtures,little or no fines. (n Q O OF COARSE GRAVEL Silty gravels,gravel-sand-silt mixtures,non-plastic fines. p �Z w FRACTION IS WITH GM Z LARGER THAN O Z N FINES Clayey gravels,gravel-sand-clay mixtures,plastic fines. Q J=u� NO.4 SIEVE GC � Q~w SAN DS CLEAN Well graded sands,gravelly sands,little or no fines. (� =W w SANDS SW �W =�� MORE THAN HALF �LESS THAN 5%FINES) SP Poorly graded sands or gravelly sands,little or no fines. OF COARSE Q w� FRACTION IS SANDS Silty sands,sand-silt mixtures,non-plastic fines. ' Q �— SMALLER THAN W�TH SM I U O FINES Clayey sands,sand-clay mixtures,plastic fines. � NO.4 SIEVE SC � � S I LTS AN D C LAYS Inorganic silts and very fine sands,rock flour,silty or clayey fine ' �W ML sands or clayey silts with slight plasticity. � LL �o Inorganic clays of low to medium plasticity,gravelly clays,sandy �Q o w LIQUID LIMIT IS C� clays,silty clays,lean clays. Q J =�O� LESS THAN 50% OL Orangic sifts and organic silty clays of low plasticity. z� C7 � =J z> SI LTS AND CLAYS Inorganic si�ts,micaceous or diatomaceous fine sandy or silty w (n � Q Q w MH soils,elastic. z w�w�N Inorganic clays of high plasticity,fat clays. LIQUID LIMIT IS CH � �� GREATER THAN 50% OH Organic clays of inedium to high plasticity,organic silts. H IGH LY ORGAN IC SOI LS Pt Peat and other highly organic soils. Definition of Tenns U.S. Standard Series Sieve Cl�r Square Sieve Openings 200 40 10 4 3/4" 3" 12" SILTS AND CLAY SAND GRAVEL COBBLES BOULDERS FINE MEDIUM COARSE FINE COARSE Grain Sizes '� I SANDAND GRAVELS BLOWS/FOOT' SILTSAND CLAYS STRENGTH"* BLOWS/FOOT` I� VERY SOFT 0-1/4 0-2 i VERY LOOSE 0-4 i SOFT 1/4-1/2 2-4 i LOOSE 4-10 I FIRM 1/2-1 4-8 MEDIUM DENSE 10-30 STIFF 1 -2 8-16 DENSE 30-50 VERY STIFF 2-4 16-32 VERY DENSE OVER 50 HARD OVER 4 OVER 32 Relaiive Densihr Consistency 'Number of blows of 140 pound hammer falling 30 inches to drive a 2 inch O.D.(1-3/8 inch I.D.)split spoon(ASTM D-1586) "Unconfined compressive slrenglh in tons/sq.ft.as determined by laboratory testing or approximated by the standard penetration test(ASTM D-1586),pocket penelrometer,torvane,or visual observation. � Sample location;blow counts listed are from the botiom 12 inches of 1 S-inch drive sample. Unified Soil Classification System (ASTM D-2487) . 24,°.°2.°, KEY TO BORINGS Plate Earth Investigations Consultants 21740 Rainbow Drive � � 3/2/12 Cupertino,Califomia 120 I I ROCK HARDNESS CRITERIA Very Hard Cannot be scratched with knife or sharp pick. Breaking of hand specimen requires several hard blows ofgeologist's pick. Hard Can be scratched with knife or pick only with difficulty. Hard blow of hammer required to detach hand specimen. I Moderately Can be scratched with knife or pick. Gouges orgrooves to 1/4 inch �, Hard deep can be excavated by hard blow of point of a geologist's pick. '� Hand specimens can be detached by moderate blow. I Medium Can be grooved or gouged 1/16 inch deep by firm pressure on knife I or pick point. Can be excavated in small chips to pieces about 1 inch maximum size by hand blows ofthe point of geologist's pick. Soft Can be gouged or grooved readily with knife or pick point. Can be excavated in chips to pieces several inches in size by moderate blows of pick point. Small thin pieces can be broken by finger pressure. Very Soft Can be carved with knife. Can be excavated readily with point of pick. Pieces 1 inch or more in thickness can be broken with finger pressure. Can be scratched readily by fingernail. Subsurface Manual for Design and Construction of Foundations of Buildings, 1976 Published by American Society of Civil Engineers. I • 2410.02.01 ROCK HARDNESS CRITERIA Plate Earth Investigations Consultants 21740 Rainbow Drive L � 3/2/12 Cupertino,Califomia V 121 i i so so 0 cH ��.a�` X 40 �rP W � CL Z H 30 V � � MH N a 20 or J OH a 10 � CL-ML ML or OL 4 — 0 ML 0 10 20 30 40 50 60 70 80 90 100 LIQUID LIMIT(%) NATURAL PASSING KEY BORING SAMPLE yypTER LIQUID PLASTICITY NO.Z00 LIQUIDITY DEPTH USCS SYMBOL NO. CONTENT LIMIT INDEX SIEVE INDEX (feet) (%) (%) (%) (%) • B-2 4' 12 31 19 61 -0.11 CL I � II I • 2410.02.01 PLASTICITY CHART Plate Earth Investigations Consultants � 21740 Rainbow Drive � 3/2/12 Cupertino,Califomia 122 Unconfinad Compressive Strength A$TM R2165 rGOO — , 6D00 �- -�--- ' - - � 5(140 - - - - { � s�0 - — I - --�-— � r > � � 3000 -- - — — --— --- I a v° izo�;r -- - ---- - t 5amp�e, 1D40 - --- , � ---1- �Samt�o2 'i ! '�� t Samye3 � ��5emplet 0 0.00 2.�JD 4 D� 6 DO 8(1Q 10 Op 12 00 14 00 Z6.00 Strain.74 Sarnple No.: 1 2 3 4 Unconfined Com re�ssive Stre h, f 5790 3889 a2$4 Untonf(rtpd Compreseive Stren i 40.2 27.Q 29.7 Undrained Shear Str�n th, sf 2895 1944 214p Failure Strain,% 6.0 5.8 15.0 Strain Rate,% er minute 1_0 1_0 1.0 Strain Rate,incheslminute 0.05 0,05 0.05 Moisture Cantent,°�L 13.8 17.4 17 0 0 Densi , cf 119.6 111.7 114 2 - Saturation,°/a 912 92 4 55.4 Void Ratio 0.409 0 509 0.4 i 5 S ecimen Diameter,inches 2.40d 2.420 2.A25 S ecimen Hei ht,inches 4.96 4.99 4.89 Hei ht to Diameter Ratio 2.1 2,1 2.p Assumed S ecific Gravi 2,70 2 74 2.70 Sam le Location Borin Sam le De ,it. Soil Deacri tion t B-1 A-4.5 Olive 8rown Sand CLAY 2 B-2 10-10.5 Olive Brown Sand CLAY 3 B-2 16-16.5 Olive Sand CLAY 4 Job No.: 114-D71 T oi Sam ie Undisturced Client: Earth Inves�� abans Project: 2410.02.�77 Rernarks Date: 311a2012 B : MD.rRU CQ�FER . za,o.oz.o, UNCONFINED COMPRESSIVE Plate Earth Investigations STRENGTH TEST p Consultants pqyg 3�y�2 21740 Rainbow Drive p Cupertino,Califomia 123 i �0 � � � �tl � N � o; U %° W �°U N - i � �� I O � rv U � � � � V I Q ° 'D U I � ��� � , � W � � ! � � la � Q� ; m � 7 0 0 0 0 � � ' m �° `_i _ _- " ° � -- - � � � � I w / c I Z ' o / o � oEi I �/ o I e^ �C � I � i '��W.. � I �� a o � 3 / �V C � � � � Qd C .� � / / ��� I a�n �U , a I ¢ I N N p Q/ � ?i� Q F-� Z V . 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'�'�� , CI��� St�t� �r � �� / :I.y�� �� �51��; � -11�c=�-, , _ _ - � , , ' fZo / ' I ' 4 J- ' -- - _ _ y. �,�� � �/� . i ��_`i- � � / . , s � �•"��'�- �� ° , t � `'`�' _ a. .~�i - . .f j�'���"- �5�� _ .I 1�,. . .�' . ��' . �[i lf� ', -�'' iiA i 1 �- �� . _ ' ' . 11� � `.i �..\ �, . i rl'�I `I �. /".��.�' �I J _ . �I,I��. /r . . �� �4 ' - - - -- � 7 'r'/ � I ��.� {�i r?��', �� ,�r �. �.I . ���� �� . 1 125 � � APPENa1X A This appendix contains excerpts pertaining to design Rainbow Drive i improvements prepared by Giuliani S� Kull, Inc_ (19l1Z198, Job 0158), including '� pavement section, embankment grading, drainage and the retaining wall on the i� downslape margin. It is apparent that the improvement design was with �espect ', ta geotechnical recommendations presented in Geafarensics` 1996 report (Job ' 96311). The follvwing are attached to complete this appendix: , Plate A1 — Portion of Rainbow Drive improvements acrass site_ Plate A2— Plan and section af Rainbow drive, Plate A3— Roadway embankrnent fill detail. Plate A4— Roadway�mbankment fill detaiL Piate A5— Roadway embankrnent fill detail, Alternative A Plate A6— Retaining wal! at curb and gutter detail. Plate A7 — Storm drain outfall detail. II I 126 - ( `� � ' '�-�� `-' ` � '�-``-�+ • .��,-�� ' ��� j - ff,y- , � f t�� �• ; � � ;�-`��s, . .� �,• '� ; ' ��� �' �, i' ' , � � : � . ., , ' � `r � t{ � �. �'s,�;��,�� - r ! � '� ��,f ; ,�jo �+��'. ���f`I ! ���.�.r - -�,�+Q �f' {(, t � � 1 �'� ; �� �� �d Q�r � , �, ��% ,i l � _ � �-� ,' r' I• , � � � �� , l I �� o�w '� �� : ,� c� � � ' ,� � r 'I ' I'� �b � � ���e . � � � '/ -_�3..'� '�, � � : . � � ,, �, � �, • �;� ' �, t � � ,,J' ir `'��'� j���. ',�( � �� `� l,.. 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I r . ..jQ� •� �..y�L ��'.`"�`�v"a,�0.��► ��.sJLc�il ',�t�'.�j� E„G:T'G,•�i .`:=-?'G,,�" � I JJ Y./ � � /_ /. � t� �—���L��S�t� t-�//L�I�'�C.2° . . ,L.:.`Re}����. ':.1 (1`, �'J''rC-.1'�'v ��G-"- r�G�� 3 � �r �— �,��r.Ti,7 J�� r L.�N�iT�1DlN�L SE�T�t�N ; a . ���: . � . ����� � 133 . i � COTTON, SHIIZES AND �SSOCIATES, INC. � CONSULTING LNC�li\�LE12S fWD GEOLOGISTS ; April 25, 2012 � C5"15'lA � ; TO: Colu1 Jtu1g ! ; Planning DepaY•hnent � CIT'Y Or CUP�RTINO 10300 Torre Avenu.e Cupertino,Califatnia)5014 1 1 SUBJ�CT: Snpplemenial Geoteclinical Peer Review , RE: Proposed Snlgle FainIly Resiclence �- 2174U R�inbow Drive , At your rec�ttest, wc hav� completed�sup}�lemental geoledliiical peer review of ' � ! the permit a}�plicltion for� new residence usuzg tlle following clocuments: . Reply to Geol-ech��ical Peer Review (rep�rt), prepared by L�a��th Invesl-igations Consuli�ull-s, daled Oclober 25,2011; In addition to the above referenc�d documeni, we have reviewed pertinent ; � � technical data from our office�Eiles. � , j i DISCUSSION The applic�nt proposes lo consLYUCI a new two-story residence with partial , basenieni on vz undevelopecl property just east of the existing access �'oadway. Access l-o l-he property is provided by this paved road which exken�is southwv'd froin the end of Rainbow Drive. I�Z olu•previous review reporl-, �lated Novenlber 25, 2U11, we recoin�nended fh�t � fotuiciation clesi�n criteria be cl�uified to enstu•e that: J:) t11e residence is ulliformly i sup�orted; 2) that access i'oadway cracl<rng is evaluatecl and i•ecoinmendations ; provided to assure � staUle roadway; and 3) th�t pro�osed del�ris flow wall desi�� ; ct•iteril is clariEied with respecl-to�ulticipated icnpact loading, i i CONCT USIONS AND RECOMMENDED ACTION � � � The Projeck Geotecluucal Consultant (�IC) has l�repared a supplemental reporl- I addressing the coiice��ns otttlined i1i oui� Novemuer 25, 2011 peer review lettei. In this ; � report, lhe �eoiecluucal consult�nt ittdical-es that residential foLUidation support will Ue I I cierived �roin ininimiun 20-Ioot deep picrs along l-lie downslol�e side of t11e residence I I Central Califm•nia OFHre Southcrn California Office 1� ' Northern C�lifornia OFfice I � 330�'illage Lane G�17 Uogt��vn Road 550-St.Charles Drive,Siiile 108 � ' Los Gatos,CA 95030-7218 San Andreas,CA9�2�19-5)(a0 Thousand O�ks,CA 913(0-39')5 ; (+108)354-`i5�2•I'�x(�IOS)359-7852 (209)73G-4252•I��ix(209)�93G-1212 (805)d47-7999•PAx(SOS)�197-7933 www.cottonshires,com 134 i , Colin J�u�� April 25,2012 �i 'i Page 2 C5151 A I ; and minimum 12-Ioot deep piers �long the�.iyslope side of the residence. The piers are I i lo att�u� a niu�llum embecirner�t depd� of 10-feel n1l-o Santa Cla►•a Formation Bedrocl< i , (or "10 feel- into earth materials with siu�ilar sh�ength chvacteristics as the Santa Clara � Tol�nakion). The corisultGu�ti indicates tliai they will be provitling field observalion � services to asstu'e 1-11at �iers are eml�edded sttfliciently into compel-enl- earth materials i � � with similar enguleering properNes. ' �, ; , � � I Tlie consultanl- h�s �vlluated t11e access roadway distress and lzas provided � � �i recoinmendatio»s for �nitigatnig �ciditional dish•ess to l�he roadway, �IC attriliutes I�, �' ro�dway distress to subgi•lcle failtnes due to Foor dr�u�age conditions, and sliallow , I landslides underminulg l�he downslope sicle of the roaclway retaining wall. Mitigation I '� recominend�lions inchide reinov�l ancl replacemeilt o[subgrade areas that experienced I I pip'v1g plus insl-a1laHon of a soldier beam rehainitlg wall along the loe of fhe existing � , wall. Tlle new wall is to i�lchtde "18-incll diaineter piers exte�ic�ing � mulunuin of 1�feet I Uelow the base of tl�e ret�inu�g wall, � , : � The consult��t Il1S evaluateci the �ultici.p�ted debris flow impacts to the � proposed developmenl a11d has indicateci that lil<ely debris fLows will be less than 3 Eeet i u1 thickness. EIC concludes thlt clebris flows exceedulg 3 feet in ll�ickness h�tve a low potential for impacting the proposed residence. The consuli:ant has evaluated the debris flow unplct wall ancl has indiclted that tlle design of t11e wall using ai� impact loacl of 85 pef is approprilte f�r the anticipated volume and velocity of debi°is. EIC notes jthat t11e wall is oriented obkquely to tlte probable�debris flow duection, �1ncl�thus will i lil<ely act �s a deflection/diversion wall. We clo not have objecl-ions to the presented � , geolechnical recoinmendations and recoinineY�d approval of the IIillsicle Exce��tion ' �� from a ge�leclmical standpoint. The following Item 1 sl�oulcl be performed prior to issuance of building permits: ! � , _ 1. Geotechnical Plan Review—Tlie Project Geotecl-�r►ic11 Consultant-should � review and approve all geotechnic�l aspects of the development �lans (i,e., site �re��uation anci grac�ing, site draiizage imp��oveinents 1nd clesign par�neters for fotindations �u1d relauling walls) to ensure that t11ei��recoimnendltions have Ueen properly incorpor�ted. The results of the Geoteclznical Pl�u� Review shotilcl be subnlitted to the ; Gity for review ancl appi•oval Uy the City Slaff prior to approval of buildulg perinits. The following sllould be performed prior to �s-buill project approvaL I 2. Geoteclulical Field Ins�ection — The Praject Geofieclinical Consultanl i shoi�ld inspect, test (as needed), and approve �11 �;eoiechnical aspects af ' , the projeet constructioil. T11e inspeclions sltould include, but necess�rily � ; I ' ; ' I � COTTON, SlIIRGS AND ASSOCIATCS, TNG ! : � � 135 � �� _ - - colin Jiing Apri125, 2012 ; j Page 3 C5151A j 'I I be limited l-o: site prep�raii�n �u1d grading; site surface ai�d subsiirf�ce draulage itnpr�vemenis aild excavatior�s for founc�ations �u1d rei�uiul�; ' walls prio7• to the p]acemeni of steel and concrele. The followuig sh�uld � be performed: • Thc Projecl Geoteclu�icll Consttllanl should perform field j observation services l-o assure �Itat piers are e�nUeddeci sufficiently ' � � itlto coinpetent e�rlh materi�ls with siinil�r engineering praperkies, ? resulting i�1 tuziloim si.tpporl-for the str��cl�ar�. i I I 'T'he results of these inspeclio��s and the as-btult co�lditions of tl�e pr��ject should be describecl by tl�e Project Geotechnical Collsultarit rn a letter and sttUmitteci to the City Engineer for review prior to fu1a1 projecl- , approval, i i LIMITATIONS t Tliis �eotecluiical peer review IZas been performecl to pr�vide teeluucal advice lo I assist the City it� its discretion�ry permit c�ecisions. Oui set�vices l�ave been limited to review of llle documents previously identifiecl, ancl �visual review of tlie property. Our opinions a�id conclusions aY�e in�de in accordance with genei��lly acceptecl pi•inciples �u1d practices of the geotecluzical profession, Tlu.s warranty is u1 lieu of all other warr�ulties, eilher expressed or unplied. � Res�ectfully submil-ted, I COTTON,SI3IRES AND ASSOCIATES,INC, i I CITY�GEOTECH ICAL COIVSULTANT ' I � � - 1 Jolu�_ . �.Walllce Prulcipal Et�gineering Geologist , CEG 1923 _ � ;_ �r � � i ..� � .. r� ����1,.r14��:- ' z-- ---~�' � �.. -----� r --- --- �---- � Pah•icl<O.Slui•es ( Senioi•Principll Geolechnical Enbu-►eer � � GE 770 ; jMW:POS:st � I � I COTTON,SX-IIRGS AND ASSOCIAT�S, INC. � I I ' 136 � ��� � , W � 21740 RAINBOW DRIVE �C Dorado Stone 'Veneer Old 1�Vorld Led���= - �'!�� ��;;� .:, M �;., __�..;�^„�,' -,�,�,,�,s,�i��_ .. ,. .g -� ... .., � . \'�4 ti . - i , ;. r. . �� , .,, ,� ��2 . ;���� �: -� _ Body ,.�, „� Y;; r �C�COI _. , , - ,, �} ' ` Dunn ���'wards - a�{1�� �' I'� LA y . . � 4 .rl u, ' u`�°- , :�� �':`� Vlie a th e r B o a rd , . �. . � ; _ -, ,;,�, . -- _ _ �din ' g - �ard�e Pl���n�. La ��._:t- � . _ P �- _ .��. . . .. _.......� . Select Cedarmill Color - Trim & Facia .� Dunn Edwards - - . - � `�,� ��,,� .�I � .�:� , � Barret Stone �'�i2.1 f� ��Y#N` s,Y't ;:�� -:�:_y.�:.��,� Roo� - GI�LF•BL���- t;:aud Cs�t�osa -� �ioa 8:owa � .�#6222 CITY OF CUPERTINO RECOMMENDATION OF ENVIRONMENTAL REVIEW COMMITTEE May 3, 2012 As provided by the Environmental Assessment Procedure, adopted by the City Council of the ( City of Cupertino on May 27, 1983, as amended, the following described project was reviewed I by the Environmental Review Committee of the City of Cupertino on May 3, 2012. ', I PRO�jECT DESCRIPTIOleT AND LOCATION I � Application No.: EXG2011-11, V-2011-03, TR-2012-19 (EA-2011-17) � Applicant; Barre Barnes (Holiday Drive, LLC) j Location: 21740 Rainbow Drive j ; � DISCRETIONARY ACTION REQUEST ! � � Hillside Exception to allow a 4,478 square foot single family residence plus a 840 square foot i basement to be constructed on slopes of 30% or greater; , Variance to allow an attached first story decl< more than 18 inches aUove grade to be setback 0 feet from the property line where 10 feet is required ! Tree Removal Request to remove and replace two protected trees: a 20" diameter, two-trunked �� and a 28" diameter, three-trunl<ed Coast Live Oalcs I i I FINDINGS OF THE ENVIRONMENTAL REVIEW COMMITTEE I The Environmental Review Committee recommends the granting of a Mitigated Negative I� Declaration finding that the project is consistent with the General Plan and is determined to be !I insignificant. /s/Aarti Shrivastava Aarti Shrivastava ' Community Development Director g/erc/REC EA-2011-17 � Ii I I 138 , City of Cupertino ' 10300 Torre Avenue j Cupertino, CA 95014 I (408) 777-3308 FAX (408) 777-3333 C l!P E FZ"T I Ivl O Community Development Department _ _ _ _ INITIAL STUDY'- EfVVIRQNMENTA►L EVALUATIUN CHECKLIST` Staff Use Only EA File No EA-2011-17 ' Case File No. EXG2011-11 PROJEC7' DESCRIPTION: -2011-03, TR-2012-19 ttachments Geotech repts Project Title: Barnes Hillside Residence Project Location: 21740 Rainbow Drive APN 366-03-063 ', Project Description: Hillside Exception to allow a 4,478 sq. ft. single-familv residence I plus a 840 sq. ft. basement to be built on slopes of 30% or greater. Variance to an attached first storv deck more than 18 inches above qrade to be setback 0 feet from a propertv line when 10 feet is required. Tree Removal Permit to remove 2 Oak trees Environmental Setting: I A vacant lot within the Urban Service area that is characterized bv steep slopes with I some slope instability. Site is within a foothill Oak woodland vegetative communitv ' PROJECT DESCRIPTIOfV: Site Area(ac.) - 1.6 Building Coverage- 6.4% Exist. Building - 0 s.f. Proposed Bldg. - 5318 s.f. Zone - RHS G.P. Designation —Very Low Density , Residential '/2 ac. Slope density formula Assessor's Parcel No. -366 - 03- 063 ' If Residential, Units/Gross Acre -0.625 du/ac � i i Total# Rental/Own Bdrms Total s.f. Price � � Unit Type#1 t I Unit Type#2 . I Unit Type#3 ' Unit Type#4 Unit Type#5 � Applicable Special Area Plans: (Check) ❑ Monta Vista Design Guidelines ❑ S. De Anza Conceptual ❑ N. De Anza Conceptual ❑ S. Sara-Sunny Conceptual ❑ Stevens Crk Blvd. Conceptual ❑ Stevens Creek Blvd. SW& �andscape If Non-Residential, �uilding Area - s.f. FAR- Max. Employees/Shift - Parking Required 6 Parking Provided 6 Project Site is VVithin Cupertino Urban Service Area - YES � NO ❑ 139 i INITIAL STU[}Y SOURCE LIST A. CUPERTINO GENERAL PLAN SOURCES D. OUTSIDE AGENCIES(Continued) 1. Land Use Element 26. Midpeninsula Regional Open Space District '� 2. Public Safety Element 27. County Parks and Recreation Department ' 3. Housing Element 28. Cupertino Sanitary District 4. Transportation Element 29. Fremont Union High School District 5. Environmental Resources 30. Cupertino Union School District 6. Appendix A- Hillside Development 31. Pacific Gas and Electric 7. Land Use Map 32. Santa Clara County Fire Department I, 8. Noise Element Amendment 33. County Sheriff '�I 9. City Ridgeline Policy 34. CALTRANS � 10. Constraint Maps 35. County Transportation Agency il 36. Santa Clara Valley Water District B. CUPERTINO SOURCE DOCUMENTS 11. Tree Preservation ordinance 778 E. OUTSIDE AGEfVCY DOCUMENTS 12. City Aerial Photography Maps 37. BAAQMD Survey of Contaminant 13. "Cupertino Chronicle" (California History Excesses Center, 1976) 38. FEMA Flood Maps/SCVWD Flood Maps 14. Geological Report(site specific) 39. USDA, "Soils of Santa Clara County" 15. Parking Ordinance 1277 40. County Hazardous Waste Management 16. Zoning Map Plan 17. Zoning Code/Specific Plan Documents 41. County Heritage Resources Inventory 18. City Noise Ordinance 42. Santa Clara Valley Water District Fuel Leak Site C. CITY AGENCIES Site 43. CaIEPA Hazardous Waste and 19. Community Development Dept. List Substances Site 20. Public Works Dept. 21. Parks&Recreation Department F. OTHER SOURCES 22. Cupertino Water Utility 44. Project Plan SetlApplication Materials 45. Field Reconnaissance D. OUTSIDE AGENCIES 46. Experience w/project of similar ,, 23. County Planning Department scope/characteristics i 24. Adjacent Cities' Planning Departments 47. ABAG Projection Series ! 25. County Departmentai of Environmental ', Health ' tNSTRUCTIONS i � � A. Complete all information requested on the Initial Study Cover page. LEAVE BLAIVK SPACES i ONLY VVHEN A SPECIFIC ITEIVI IS NOT APPLICA�LE. � I B. Consult the Initial Study Source List; use the materials listed therein to complete, the checklist � information in Categories A through O. I C. You are encouraged to cite other relevant sources; if such sources are used, job in their titie(s) ! � in the"Source" column next to the question to which they relate. I D. If you check any of the"YES" response to any questions, you must attach a sheet explaining the ', potential impact and suggest mitigation if needed. ', E. When explaining any yes response, label your answer clearly(Example"N -3 HistoricaP') Please '� try to respond concisely, and place as many explanatory responses as possible on each paqe. i F. Upon completing the checklist, sign and date the Preparer's Affidavit. G. Please attach the following materiais before submitting the Initial Study to the City. ✓Project Plan Set of Legislative Document ✓Location map with site clearly marked (when applicable) ' 140 Ii EV,�LIJ,�TION OF EIV!/IROiVMENI'AL If1�PAC1'S: j � o ,� I cc � v � v � � L � v � � II ISSl1ES: � = `� � � = `� � � = � ° �- [and Suppor�ing Inforrnation Sources] O �_ � � 3 �' � � �_ � �. cn � c� c � cn I. AE�TFIETICS -�VVould the project: a) Have a substantial adverse effect on a ❑ ❑ � � scenic vista? [5,9,24,41,44] I, I b) Substantially damage scenic resources, ❑ ❑ ❑ � I including, but not limited to, trees, rock outcroppings, and historic buildings within a state scenic highway? [5,9,11,24,34,41,44] c) Substantially degrade the existing visual ❑ ❑ ❑ �. character or quality of the site and its ' surroundings? [1,17,19,44] d) Create a new source of substantial light or ❑ ❑ ❑ � '', glare, which would adversely affect day or I nighttime views in the area? [1,16,44] II. AGRICULTURE RESOURCE�: In ' determining whether impacts to agricultural resources are significant environmental effects, lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1997) prepared by the California Dept. of Conservation as an II optional model to use in assessing impacts on agriculture and farmland. Would the I, project: �, a) Convert Prime Farmland, Unique ❑ ❑ ❑ �i II Farmland, or Farmland of Statewide I Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the ' California Resources Agency, to non- agricultural use? [5,7,39] b) Conflict with existing zoning for ❑ ❑ ❑ � agricultural use, or a Williamson Act , contract? [5,7,23] c) Involve other changes in the existing ❑ ❑ ❑ �, environment which, due 4o their location or nature, could result in conversion of Farmland, to non-agricultural use? [5,7,39] 141 o ,� �'� � _ � �' � � +� � �av i sv � � L .� vc� v '� ::r ._ ca �° ._ o I� �— �a O c� , ', ISSUES: � c '� e3 �' A Ne � � � i [and Supporting Inforination Sources] A �� � � � v � a�_ av� � c� s � v� III. AIR QUALII'Y—Where available, the �� significance criteria established by the applicable air quality management or air � pollution control district may be relied upon , to make the following determinations. Would ' the project: I � a) Conflict with or obstruct implementation of ❑ ❑ ❑ ��. the applicable air quality plan? [5,37,�2,44] b) Violate any air quality standard or ❑ ❑ ❑ �. contribute substantially to an existing or I projected air quality violation? [5,37,42,44] ' c) Result in a cumulatively considerable net ❑ ❑ ❑ �. increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors)? [4,37,44] d) Expose sensitive receptors to substantial ❑ ❑ ❑ � pollutant concentrations? [4,37,44] '' e) Create objectionable odors affecting a ❑ ❑ ❑ � substantial number of people? [4,37,44] IV. BIOLOGIC�4L RESOl1RCES ��Would �i the project: '', � a) Have a substantial adverse effect, either ❑ ❑ ❑ ,� '!, directly or through habitat modifications, on �, any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game ' or U.S. Fish and Wildlife Service? [5,10,27,44] b) Have a substantial adverse effect on any ❑ ❑ ❑ � riparian habitat or other sensitive natural � community identified in local or regional ; plans, policies, regulations or by the '� California Department of Fish and Game or ' US Fish and Wildlife Service? [5,10,27,44] c) Have a substantial adverse effect on ❑ ❑ ❑ ,� federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal 142 �I � .�.� � � � � � Q � � � � � � � � � � V � � L � V V V �$$UES: � � c� F- � o � O� � � � p Q N ' a9 � y � [and Suppor�ing Information Sources] A �� � � 3 � o N � � � v a� ,_ _ � � � � � � � pool, coastal, etc.) through direct removal, ' filling, hydrological interruption, or other ' means? [20,36,44] ' d) Interfere substantially with the movement ❑ ❑ ❑ �, of any native resident or migratory fish or wildlife species or with established native �� resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites? [5,10,12,21,26] e) Conflict with any local policies or ❑ � ❑ ❑ ordinances protecting biological resources, such as a tree preservation policy or ordinance? [11,12,41] fi� Conflict with the provisions of an adopted � Habitat Conservation Plan, Natural ❑ ❑ ❑ � I Community Conservation Plan, or other �i approved local, regional, or state habitat conservation plan? [5,10,26,27] V. CULTURA►L RESOURCES --11Vould the ' project: a) Cause a substantial adverse change in ❑ ❑ ❑ �l ' the significance of a historical resource as defined in §15064.5? [5,13,41] ' b) Cause a substantial adverse change in ❑ ❑ ❑ ,� ' the significance of an archaeological ' resource pursuant to §15064.5? [5,13,41] '' c) Directly or indirectly destroy a unique ❑ ❑ ❑ (� ! paleontological resource or site or unique geologic feature? [5,13,41] d) Disturb any human remains, including ❑ ❑ ❑ � those interred outside of formal cemeteries? L1,51 VI. GEOLOGY�►IVD SOIL� -�lould the ' project: ' a) Expose people or structures to potential substantial adverse effects, including fhe risk of loss, injury, or death involving: i) Rupture of a known earthquake fault, as ❑ ❑ ❑ �, delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issued by the ', � 143 i � � � � '�� � � � � � v .� � ° L � � v v I$SUES: �' v � �- v �" ccc � vca � ca � �. ._ � � ._ ,� ._ � � a y .= n. � [and Supporting Infornnation Sources] O �_ � � � v � ,a�� � � cn � cn s � v� State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42. [2,14,44] ' ii) Strong seismic ground shaking? ❑ � � � [2,5,10,44] iii) Seismic-related ground failure, including ❑ ❑ ❑ ❑ liquefaction? [2,5,1Q,39,44] iv) Landslides? [2,5,10,39,44] ❑ k7. � � b) Result in substantial soil erosion or the ❑ ❑ ❑ �� loss of topsoil? [2,5,10,44] c) Be located on a geologic unit or soil that is ❑ ❑ ❑ � unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction or collapse? [2,5,10,39] d) Be located on expansive soil, as defined ❑ ❑ ❑ �� ! in Table 18-1-B of the Uniform Building Code (1997), creating substantial risks to life or property? [2,5,10] e) Have soils incapable of adequately ❑ ❑ ❑ �° , supporting the use of septic tanks or I alternative waste water disposal systems ' where sewers are not available for the disposal of waste water? [6,9,36,39] ' VII. HAZARDS AND HAZARDOUS MATERIALS —Would fhe project: a) Create a significant hazard to the public or ❑ ❑ ❑ � the environment through the routine transport, use, or disposal of hazardous ' materials? [32,40,42,43,44] �� b) Create a significant hazard to the public or ❑ ❑ ❑ �, the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment? [32,40,42,43,44] c) Emit hazardous emissions or handle ❑ ❑ ❑ ,� hazardous or acutely hazardous materials, ', substances, or waste within one-quarter mile ', I 144 'I �+�' � �' O � � � � � � � � � s � � 1C V v � v � � i � v CJ CJ ' ISSUES: c � `� � � +' � � N :*_- g ° � � [and Supporfing Information Sources] � �_ � � 3 :� v � �� � ! a � � � � � � _ of an existing or proposed school? i [2,29,30,40,44] I, d) Be located on a site which is included on a ❑ ❑ ❑ � � list of hazardous materials sites compiled !, pursuant to Government Code Section !, 65962.5 and, as a result, would it create a I significant hazard to the public or the ', environment? [2,42,40,43] ' e) For a project located within an airport land ❑ ❑ ❑ � I, use plan or, where such a plan has not been ', adopted, within two miles of a public airport ! or public use airport, would the project result , in a safety hazard for people residing or � working in the project area? [ ] I � For a project within the vicinity of a private ❑ ❑ ❑ � �!, airstrip, would the project result in a safety '�� hazard for people residing or working in the � project area? [] j � i g) Impair implementation of or physically ❑ ❑ ❑ � ' interfere with an adopted emergency ; response plan or emergency evacuation ' plan? [2,32,33,44] h) Expose people or structures to a ❑ ❑ ❑ ,�., !, significant risk of loss, injury or death I involving wildland fires, including where '�I wildlands are adjacent to urbanized areas or � where residences are intermixed with ' wildlands?[1,2,44] I�, I VI11. HYDROLOGY i4ND VVi4TER QlJ/�LITY -�Would the projec4: a) Violate any water quality standards or ❑ ❑ ❑ �7 waste discharge requirements? [20,36,37] b) Substantially deplete groundwater ❑ ❑ ❑ � i supplies or interfere substantially with , groundwater recharge such that there would �,I be a net deficit in aquifer volume or a � lowering of the local groundwater table level (e.g., the production rate of pre-existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted)? [20,36,42] C � 145 � o � � _ �a � v .� � ° L � '� i v ISSIIES: c � � F- � � a °a, � � � ° � [and Suppo�ting Information Sources] � �� � � 3 � v � �� � � v� � u� � � v� c) Substantially alter the existing drainage ❑ ❑ ❑ � pattern of the site or area, including through the alteration of the course of a stream or river, in a manner which would result in substantial erosion of siltation on- or off-site? [14, 20,36] d) Substantially alter the existing drainage ❑ ❑ ❑ -� pattern of the site or area, including through the alteration of the course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which ' would result in flooding on- or off-site [20,36,3II] � e) Create or contribute runoff water which ❑ ❑ ❑ � would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of � polluted runoff? [20,36,42] � Otherwise substantially degrade water ❑ ❑ ❑ �(. ' quality? [20,36,37] g) Place housing within a 100-year flood ❑ ❑ ❑ ,�. hazard area as mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? ' �2��$l _ I h) Place within a 100-year flood hazard area ❑ ❑ ❑ � structures which would impede or redirect j flood flows? [2,��] ' i) Expose people or structures to a significant ❑ ❑ ❑ � risk of loss, injury or death involving flooding, including flooding as a result of the failure of a levee or dam? [2,36,3�] j) Inundation by seiche, tsunami, or ❑ ❑ ❑ ,�� ', mudflow? [2,36,38] � IX. LAND U�E �4ND PLi4NNIfVG m Viloulcl the project: I a) Physically divide an established ❑ ❑ ❑ :� community? [7,12,22,41] b) Conflict with any applicable land use plan, � ❑ ❑ ❑ � policy, or regulation of an agency with ' I 146 i � 8 � �i � � � � �,+ � Q R fd � �+ a.., I �C v C1 '� v � �, L � V C� C� ISSUES: s � `� � � = � °� N :� g ° g [and Suppo�ting Inforrnation Sources] o �� � � � o � �� � � � � � � � � jurisdiction over the project (including, but I not limited to the general plan, specific plan, � local coastal program, or zoning ordinance) I adopted for the purpose of avoiding or I mitigating an environmental effect? [1,7,8,16,17,1�,44] c) Conflict with any applicable habitat ❑ ❑ ❑ � conservation plan or natural community conservation plan? [1,5,6,9,26] X. MINERAL RESOURCES --Would the i, project: a) Result in the loss of availability of a known ❑ ❑ ❑ � mineral resource that would be of value to the region and the residents of the state? [5,10) b) Result in the loss of availability of a ❑ ❑ ❑ �. , locally-important mineral resource recovery ' site delineated on a local general plan, ' specific plan or other land use plan? [5,10] ' XI. NOI�E �-Vllould the project result in: ', a) Exposure of persons to, or generation of, ❑ ❑ ❑ �,, noise levels in excess of standards ' established in the local general plan or noise I ordinance, or applicable standards of other agencies? [�,1�,44] b) Exposure of persons to or generation of ❑ ❑ ❑ �1. excessive groundborne vibration or � groundborne noise levels? [�,1�,44] c) A substantial permanent increase in ❑ ❑ ❑ � ambient noise levels in the project vicinity above levels existing without the project? �8,1�] d) A substantial temporary or periodic ❑ ❑ ❑ ,�I. I increase in ambient noise levels in the project vicinity above levels existing without the project? [8,1�,44] e) For a project located within an airport land ❑ ❑ ❑ �, use plan or, where such a plan has not been ' adopted, within two miles of a public airport �I or public use airport, would the project expose people residing or working in the 147 I - � � �, >'� � � � A � � � � .M ca v v � v = �, � .� v v v ISSUES: � _ � N = 3 � � � ,� � o � [and Supporting Information Sources] 0 g,_ � � ._ v � �_ _ a u� � c� c � cn project area to excessive noise levels? , [8,1�,44) i, � For a project within the vicinity of a private ❑ ❑ ❑ �, airstrip, would the project expose people residing or working in the project area to ' excessive noise levels? [�,1�l I � XII. POPULATION AND HOUSING --Would the project: , a) Induce substantial population growth in an ❑ ❑ ❑ �. area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of roads or other infrastructure)? [3,16,47,44] I b) Displace substantial numbers of existing ❑ ❑ � � �I housing, necessitating the construction of �, replacement housing elsewhere? [3,16,44] c) Displace substantial numbers of people, ❑ ❑ ❑ ,�. necessitating the construction of replacement housing elsewhere? [3,16,44] XIII. PU�LIC SERVICES a) Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered ' governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant ' environmental impacts, in order to maintain '� acceptable service ratios, response times or ' other performance objectives for any of the public services: � Fire protection? [19,32,44] � ❑ ❑ � � Police protection? [33,4A�] ❑ ❑ � � Schools? [29,30,44] ❑ ❑ ❑ � Parks? [5,17,19,21,26,27,44] ❑ ❑ � � Other public facilities? [19,20,44] ❑ ❑ ❑ � XI!/. RECR ATIOIV m� a) Would the project increase the use of ❑ ❑ ❑ � existin� nei�hborhood and regional parks or ', 148 _ _ � A �+ � � � � O � � � � +� tC V v g v � �, b. S v C1 t� �S�uES: � ;� t3 � � � � Q � � � o Q. N ' � � y = � [ancl Supporfing Information Sources] a �� � � � � v � ,a�� � a cn � u� � � v� other recreational facilities such that � substantial physical deterioration of the facility would occur or be accelerated? � [5,17,19,21,26,27,44] b) Does the project include recreational ❑ ❑ ❑ � ? facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the : environment? [5,44] XV. TRANSPORTATION/TRAFFIC -- , Would the project: ', a) Cause an increase in traffic which is ❑ ❑ ❑ � substantial in relation to the existing traffic load and capacity of the street system (i.e., result in a substantial increase in either the i number of vehicle trips, the volume to � capacity ratio on roads, or congestion at intersections)? [4,20,35,44] 'I b) Exceed, either individually or cumulatively, ❑ ❑ ❑ � ! a level of service standard established by the ' county congestion management agency for � ' designated roads or highways? [4,20,44] ' c) Result in a change in air traffic patterns,� ❑ ❑ ❑ �. including either an increase in traffic levels or a change in location that results in � substantial safety risks? [4,?] d) Substantially increase hazards due to a ❑ ❑ ❑ � design feature (e.g., sharp curves or � dangerous intersections) or incompatible ' uses (e.g., farm equipment)? [20,35,44] e) Result in inadequate emergency access? ❑ ❑ ❑ � [2,19,32,33,44] ' � Result in inadequate parking capacity? ❑ ❑ ❑ � ' [17,44] g) Conflict with adopted policies, plans, or ❑ ❑ ❑ � I� programs supporting alternative transportation (e.g., bus turnouts, bicycle racks)? [4,34] XVI. lJl'ILITIE� P►ND �ERVICE SYSTENIS — Would the project: 149 i � o � �� v g � o � = � v v v v � +� �, v o � ._ ca I— .— � cc o c� �a I$SUES: � _ �' = 3 •a' A N = � � [and Suppo�ting Inforination Sources] � �� � a, = v � ,a�_ a cn —' v� � � va a) Exceed wastewater treatment ❑ ❑ ❑ � requirements of the applicable Regional I Water Quality Control Board? [5,22,2�,36,44] �I � b) Require or result in the construction of ❑ ❑ ❑ � I new water or wastewater treatment facilities ' or expansion of existing facilities, the construction of which could cause significant environmental effects? [36,22,2�,36] c) Require or result in the construction of ❑ ❑ ❑ � � new storm water drainage facilities or � expansion of existing facilities, the construction of which could cause significant environmental effects? [5,22,2�,36,44] ', � � I e) Result in a determination by the ❑ ❑ ❑ �. '� wastewater treatment provider which serves or ma serve the r o'ect that it has ade uate Y p 1 a capacity to serve the project's projected demand in addition to the provider's existing commitments? [5,22,28,36,44] ' fi� Be served by a landfill with sufficient ❑ ❑ ❑ � permitted capacity to accommodate the project's solid waste disposal needs? [?] g) Comply with federal, state, and local ❑ ❑ ❑ � statutes and regulations related to solid waste? [?] �I '�� , � i I�I 150 ll I ,I X�/IL MANDATORY FINDINGS OF SIGNIFIC�►NCE �, , (To be complefec9 by City Staff) �!� a) Does the project have the potential to ❑ ❑ � � ! degrade the quality of the environment, I substantially reduce the habitat of a fish or ', wildlife species, cause a fish or wildlife population to drop below self-sustaining ', levels, threaten to eliminate a plant or animal ', community, reduce the number or restrict the � � range of a rare or endangered plant or ; animal or eliminate important examples of the major periods of California history or ; prehistory? [] , b) Does the project have impacts that are ❑ ❑ � � individually limited, but cumulatively , considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects)? [l ' c) Does the project have environmental ❑ ❑ � � '� effects which will cause substantial adverse effects on human beings, either directly or indirectly? (] PREPARER'� �►1FFIDAVIT ', , I hereby certify that the information provided in this Initial Study is true and correct to the il best of my knowledge and belief; I certify that I have used proper diligence in responding , accurately to all questions herein, and have consulted appropriate source references I when necessary to ensure full and complete disclosure of relevant environmental data. I I, hereby acknowledge than any substantial errors dated within this Initial Study may cause ', delay or discontinuance of related project review procedures, and hereby agree to hold ', harmless the City of Cupertino, its staff and authorized agents, from the consequences of ', such delay or discontinuance. I Preparer's Signature �"''�1`� ' , Print Preparer's Name Colin Jun � � 151 � �I ii II ENVIRONMEPIT�0.L EVALUATION (To be Completed by City Staf�`; ' i ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED: The environmental factors checked below would be potentially affected by this project, � involving at least one impact that is a "Potentially Significant Impact" as indicated by the � checklist on the following pages. , ❑ Aesthetics ❑ Agriculture Resources ❑ Air Quality ;�I., Biological Resources ❑ Cultural Resources „�3„ Geology/Soils ❑ Hazards & Hazardous ❑ Hydrology/Water ❑ Land Use/ Planning ', Materials Quality !, ❑ Mineral Resources ❑ Noise ❑ Population / Housing , � ❑ Public Services ❑ Recreation ❑ Transportation/Traffic ❑ Utilities / Service ❑ Mandatory Findings of Systems Significance DETERMINATION: ; On the basis of this initial evaluation the Environmental Review Committee (ERC) finds that: ❑ The proposed project COULD NOT have a significant effect on the environment, and ' a NEGATIVE DECLARATION will be prepared. f�, Although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because revisions in the project have been made by or agreed to by the project proponent. A MITIGATED NEGATIVE DECLARATIOfV will be prepared. ❑ The proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required. ' ❑ The proposed project MAY have a "potentially significan4 impact" or"potentially significant unless mitigated" impact on the environment, but at least one effect 1) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT I is required, but it must analyze only the effects that remain to be addressed. , � ❑ Although the proposed project could have a significant effect on the environment, �' because all potentially significant effects (a) have been analyzed adequately in an ' earlier EIR or NEGATIVE DECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to that earlier EIR or NEGATIVE ' DECLARATION, including revisions or mitigation measures that are imposed upon the ��i proposed project nothing further is required. i � Colin Jun � �� 5/2/12 Staff Evaluator , Date ���.�z -'"�������'j� 5/3/12 ER air rson Date 152 , r ° , , . �� �' .i. oF. r 3' ,'a, :.. ,� �, / �. f f � � • �� . - t�� � .` . . . /!^ ` x.• �fc. ,^ , < h4 . 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Pi.n75Fi5�C[i1' A09-ReFlectedCeitingPlans ra eam pt� [�wcATSn REFl 2GFRICGRATOR SH SINGLHtNNG , SLD SLIDING 7'IiMP 'I'I!MP141tA11Y z ' 1�'P TYPIGIL - E WASH WASHeR WCR WATER Owner Data: � HOLIDAY DRNE LLC Le�end: u�s DE LA cauz sLV�#c � racrV wa�c-vc4 srtios SAN'TA CLARA,CA 95U50 NEW WALG21C6STTJD5 �' z noos,a�-o� 6ARRE BARNES � ? �os7c�ooR,4 6%6'-8" PH 40A-234-9061 CELL � .._--____. .._ w ...-. ... ... ... .....- Wu�mow.a axn�-rv smtc[eH[nac FAX408-827-4252 � PII406-827-4251 � � Slte Pldll General Scope Lot Data: � �o SCale:1"=20'-0° R�o�wcoracnavoroxsmcc�raw�Y n.P.t.r.: a66-s-bs _ _ ; General Notes: Lot s;�e:e9,696 Sq.Ft. � Propexty Locerion: 21740 Rainbow Drive . _ ALL NEW WORK 70 BE IN Zoning Distrtict:RHS ' CONfOHMANCI+.W�'�'H; $fOtiC3;Tlt[2C � ` V� 1�� ���� i I i� ��I,I �I�� I��� �i i i ���� I�I I 1 I� I�I� �" CBC-CALIFORNIA BUR,DINC C0D�201D ♦ �i i 'w i��� � ��/// � c�c-cni�ow�us[.acr[c[ct.[,cn�c-2oto Allowable Floor Area:4,550 Sq.Ft. � ° ���I � � I I I �r��C+ I I �T-I I I tl� I��'I��t) ��� cr,�c cn��o2N�n r,mcHenucnccoD��aw � � IIII� I I I I I I I II I i crccv.ffou�nrcvraBNCCOnUZO10 ��I� � I��� � �� IIII �III I I�I I�I� �III I�I � �I� � Hooae:FARCalculatlons: CPC-CALIPOIWIA PIRIi CO�II-71170 O � ���I ���� �� I I I I ���� ���� ���� �I I I ���I �I�I I�I� I�I I ���� �I�I I � CflGCAttPORNIA ENPRGY coDH-2oio E+=Madmum allowable house size psior to inetituting khe y� �_' I 'I I ��I� �°�i I I I� I��� I��� �I I I ���I �I�I I�I I I i�I I I I I I I I , ll / mau�rrnannTioNn�.eon.oirrc coDSano� m�cimum 6,500 squaze foot buIlding size. � o , p I I I I �� I emtC-ttn�gOam n�Cyniv[cn�cooawo� B=Net lot area. � � �1- -� 1 � i I�� I �� � I I i; ��I I �I I 1 ���I �I�i I I I� I�I� �� ��I � ll n„°��mcr�s � oec-unm�onn�rLU�,mnvc cooa-wov ' -- � I��� �I ��I I �I�� I I I I I I I I I� I �I I I I I �� � �Fir a�y.�r F�RES � waaNA'rioNna ec¢cra�c cooa-zoo5 Slope Adiustment Critesia � � I I I I� I I i I !�I I I � I I I �� �o eas s cnc�ox�rnEneacYCO�ezoio o O� y� � /� �� � � � I I ( �� � � I I � i _ e�6.,� eM�r � - Avera e ercent slo e of lot=30 M � �� I I �I � I�I I �I�� I I I ��I I ���� �I I� ���I I�I� I � � �I � I � cacaoa,��cae¢crauaomcsrnNnnaosmns B P P i �T ��� � � �i � I I I �� I� I I I I 1 I I I � I I I I I � l / cueattTwoM[nv[Cent Co�n Floor Aiea Ratio(PAR � � �� j � - i I �I � � I I � 1 I I I I I�I� I I � I I I�� I� I,�, / l P, 7�-r - o �-� � � �� I ��I I �i�� I I I ��I ��I I ���� ���� ���f I�I I� I I �� � n�LwttrrrstoaneN9oNSS-Jnr,cxnxu Pa¢ciiouNC¢ 4500 fox ficst 10000 sE � � ; �, �� I ( I I I � I � I I I �� � I I I � oveascl,cEO�m�NS�oNS. 59.59 affoc each 1000 sf over � € � I� � �� �I I �I ��II �I� I I�I� I�I� ���� I � �II ��I � � � ' t , � �I � I I�� I� �I I �I� �I I I ���� �I�I I�I I I�I �� ��� �,•ar.,�e coNrancroa nss[m�srui.cnnsroNSaon.inFOa � - ��� I �I � I I I�� � I� � ��I � � I I I �I �� � � �� � A - sr�F�R� n�r[-[oonrronanNN�orcoNSraucrioN�wnrox A=((B 10,000)/laoa)(5v.59)+4500 � � I I � o�.� / � � I�� I I I I I I � I I I I � `ss �0 n�L7on srre sn�eTr ouzenvc coxsrxvcrioN. ��� � � �r�/ /�I 1 �I�� ���� I I�� �I I I ���� �I�I I�I I I� � I I I I ll `j� � (�s.�e oR�u� �s.s � A= 69,696-10,000 1000 59.59+¢500 � � I :� ��� I � I I I o ' <I EqsF�� ( � ,� - / / lI I ' I III I I I I I I I I I�� � qt GRADESTOOGSLOP6�AMAIM[INOi2°6AWAY �� �I �� � ) " �v � ��\ � � � I I i �I I I�I� I I � I I �I I I o„G y .�.El�r�' IROM THC Sflt[7C1'URPS FOR HORIZONTAL DISTANCE `�' W ''��.. � oA��I�� /���� ��1 I ���I I�!� �I I I �1�I I I�I I�I I �I i I I I I F� �e�;i�.� n'r�ans��s�-0°. ToEal Allowable Squaze Footage=8,05728 aqR. � � � '� � � �- I � 11 1 IIl �l�l l��� lb'� s c GRAPHIC SCALli � � ���� -��� l/��ll�������� �Ill ����� ����1� I �l���l��������ll������ � ���� .: sot[s�aavoar�tucrso��nrncc oa..vicewt.[es,erc. MaximumAllowableSquueFootage=6,5W�q.ft. � � � , � 1 � �I I� I ! I I 1 / e ,o ao f ) � / 1 I � � ! / � � --- �- Allowahle Floor Areq=8,057 x 0.70=5,640 s ft. � � � � �"1���;-���%/ �ll�� ��l ���� ���� �������1�1�1!lI � � � ii�an Meto�re. �� � f ''� � � _ �� i� / � �l/ �� / �I�I l�11 � � �l �1C1I1ltV Ma 7�'. !Proposed Coi�ditions � � •� � ��\ — l �I f l�f� � �<< 'I 1I , T 1 I ! I �q -'����T�� _-= J //// /(I 1 'Ill I /,r, I II I I ! l/l 1I !J "�Houea: ,..� I � � � � / // � ���� nnNrnow cr �enh�y]owei level= 216.00 sf � � � � � _ ��� �-� �� � 1��1 111 ���� Jl�1 �Il J l 11 l �� 44� qr � arae- � c� 6i+ o a _� �� ` _ _ I I f I _. $ �nain level= 604.00 sf i �I�� ' // I l l l �� 1 !�l 1 I f � . �' _ m u er levet= 2,S 15.00 sf � � "� a 6"��� ���� �- � / 1 11/1 ���� ! � o D-, . � i / I� I 4 I I I �; PP 843.00 sf . p � � e, � t; �� -.� � � , ��� 1����� f r I� !�I� I���� J 1�� 1 I I��I I�� 1 � � ' �� - � Total Allowable Tootage: 4,478.00 sq.Il. � � i� z p � � � -�1�� ���_ � �/// ��� �l�l � I1 l�� ��ll I��I Ij l� I s �� � basemenY- �. � � � ���� � � _ - �� ��� � � rJ � i �ii i��i i �� � i ;,,, , T� � aao.00se G� Q � � � �__ � ,�, -; - l il I�l 1 � l �II II �� `� � �,-.�r� a� � --=�� � ���� ����od°j , � � � 1 I ���I I��I I I I - . � � o � � � � � Lmperviovs Aieas � =- - -: ����� „ � , i/�/�I1 �ll� � I II �II II (�r �m T "�-�V . . � � J - - --� � �\� � � ;= _ � ��i I I I � � i I I� I I � \ �I, , _ � ��� �� ������ - � �i/ ���I I I�I e6�-�I I I I ��1 1� �� � � � yYy-� �4 xy- � �� `59�� srre Driveway 473.25 sq.ft. � -\� � - /o � ��� .� Iti �� ��I '�� �11 11 / I7y y.� � � � - �� � - // �'' �� w I� I I 1 �� ���l /� !� II I l l 1 !! 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DATE OcLobcr 25,2D11 I SCALE �i 3/16"=1'-0" „ ��g Plo�cetNumbcr i No - SHL�GT ; _ ! g ; , No 1 „ ._.. .... ^ _ _._.. _._... . e �o FIIZ�T FLOOR RCP Scale:3/16"=1'-0" � i � �� � �-�- � _� - � REVISIONS BY ; , E E �L ��� N l ra���€ �o �;��r���-�a��: Q� 2s i CONTRACTOR SHALL NOTIFY USA (UNDERGROUNU SERVICE ALERT) i.au rrom�sr�ati ee iu n�ccwoaNCF w�1r+me smrE o�caueoeNU o�eanraENT or ,e AT �90-227-2600 A MINIMUM OF TWO WORKINC� DAYS BEFORE � � TRANSPORTAiION STANDRRU SPECIFICP.TION)fGAiED AIAY?.;1�fi),STANOARL PLANS(I]AiEO p PFFOJECT SI-IE i niav�oo�i nrao cm ov caPSanNO srarionRO osrn��s rHe cauwacr�m sr�n�Pea�oen+ a APN:342-77-038 � BEGINNING UNDERGRUUND WORK FOR VERIFICATION OF THE LQCA710N iHE VlC.riH�ESCRI9ED IN RiE SPEC.FICaIION.Af:D AS SHOLt?!ON 11E�RA1`.SNGS,A!!0 TO THE � Q � � 3 . sansFncnoHOr iHe an�r�nr�rEa. c,° o OF U�O�RGRl7U�D UT�LITIES. 7 3 2.iNE CONiFqCTpR I$iFQLIRED tt]��IOiI�Y TIE F'JBJC iYOPKS IYSFEGIOH R4U(2)4'iPRKI!VV SAI �AYS PfiIOR TU REWININ(;Tfl INSPEGTION,TV'�(�)Vr01iKiNG�AYS PRrOR TO INSTALLING �� O $5 � PERMANENT S1iiIPIIJG,THE rotiFACtOR 54ALL C4Ll FOR RcNEVV ANO AFi'ROVAL UF lHE uA�/T�O, Q I ������� ����� 3 PROPQT�STRIPI�G B'f iHE Cli�i1iAFVlt;ENGI4EER.lHE CIiY SHrtL HAVE lHE'r•ICHT TO � � FA41(E CHANGES IM tNE LACATIC4�OF 1HF f.fJC�111Et1T Oi�LANE STeil!'ES AlID FAVElAENT I.fARKINGS. U U �.nu uNOCrsceauN�ununes sHAU ee ws�autu nruo noeQUnhe�rnckr�uEn eerors6 ?'_ I) CIVIL ENGMEER OR 5011_S ENGMEER TO REVIEl4 ALL GRADING AND SUBlAIT A RNAL . i P�,�cEenervr�itie ense tiia�rlA�r.Nn su rq c smucnincs.ir unun[s nae ru ee ir�sra.ueo � j��' RFPORT TO THE CITY PRIOR TO OCCOPANCY. I SUHSEaVENiLY,A WR�TIEN NOTIFlCAnON FROM1I iHE.1FFEC1E0 V1.LITY GUI,fpA�l'/;NOIC'AIING IT> q ' col,uAinIENT TO oORE OR NNUEL SHnit OE SUBMInEO TO TriE Gltt ENraNttst 9FFnRE c,'�' 2) COMPACTION REPORTS AND PAO FLEVATION CERTIFICATION IS RFOUIRED ON AL� eeoce�o-ic c�vm nie v.vex.uo-�oee�aoupio ununes,excear sroR�n nwo sn�urAer sex:x, C�;II�ING PAD WORK. ; Y�iLL NOT BE PEItMIiiE�IN f'A`1F1�IENT AREA,M9M fHE f%GEPPON OF STkEET CROSSI�ICS, ' OtIlER1'd5E SPCCiFICAt1Y APPftOVE��1nIG n�iHOai�E[t[3Y TF;E Cltt LNGINEER. �I a�ne cavmncroa sNn��nnve au op me u���rties,ur�oefccecwruu�nraNS,nN�sckwces 3) CONTACT PUBLIC WORI<S, (4�8) 777-3104,POR DRAINAGE AND FINAL GRA�E � TMnT n�nv coNfucr wrH ME vaoaecr�ocnhn iu 7Ne Flein.n+F coNmacla�e si�in��conimncT MSFFCiION, WHICH INCLUDES UR!M LIWES AN�ROOf�RHMS/OOVJM ,.POUTS. �ci � i �' urmescaourvo:[a�ncE a�Eer(usn)iwv(z)�•.�RKinc oqvs iN novnN�oF nnr woRK, 4 CON IRACIUR IS R[SPONSIBLF. FOR DtJST CGNiROL AMD IPISURING THE AREA S+��' i voa�ocnnc�is oF me uoioeec5ounn rnc unES,qT(eoa)saz��zaaa. �'�'��� ��P FDJACFNT TO 7HE'NORIC IS LEFT IN A CIEAN CUN�I IION. ��" i o c � 1 � N07 TO 5CALE � 1 'i �LL RtE11CH DACNRL,FlLL AREAS AND BAS[AIATFiIAL SHnLI ATTWtI A A'IN IAIIAI 9�], � -"--� - - g�� U R�LAnvE cohlYnC110u A5 N�SfAM1UqHU sPr:clrlcArlOn�s Foa TvPICAL TRENr,H sECTIOhS, 51 LHE CON�IRACTOR SHALL REVIEVV ST�. �ETAII_ fi-�CN TREE PROTECTiON PRIOR TO �N N � - i nereR m me cirv sTqNn„gn oernns rnTM 1ne excErnen ar sr,minev sev,Ea. ACCOMPLISHIMG A�Y WORI(OR REMOVING.4NY TREES. 'a��,:� - fi.ALL 1REE5,RGOTS'PNO FUREIG�!MATTEft IN EKISTINC Cfl PROPOSED kIGHT OF\4AY SFIALL BE n 6) �l.L GRADWG SHALL k7E OONE IN ACCDR�ANCF WITH THE SOILS REPORT PREPARE� t.� REtd0�0 N 4 OEPTH�F i15D(2)FEET 6EL04'/SVEGRFl�E ANU UI�VaSED OF. . . 5'� N ��c BY POILAI< ENGWEERWC WC., DAfEU 8/2tf/17. '��rn , �uj I " ],plL EXISTING PAKI.IENT f:QlOVEO OR DAMhGED SHALL 6E FEPIACE�AS FEQUINEO BY iHE � � ! CIT!ENGINEEH. �` rn a 7) ALL S10Rh1 LINE INSIALLATION WITN S�OPE t FSS THAN ?%SHALL BE CERTIFlE� �I �vi ^ �� � &ALL CONCRETE I15EG FOR ALL SiRLCTURES l.IUST 5E CI A55"A"(6 SAGI:S PER CUBIC 1'ARU) BY A CIVIL.ENGINEER_ $� K u�{' ,\��� rt5 PER STAMOM�SPEC;FlCAii.�'i�JS AND SHAL ATiAifl A STREf1C1H OF 3,000 P,5.1.IfV 36 DPYS. , r . - � 01!G -�a� sioe�vaucs,cuaes nNn cur�es senu.ee ci.ns;'a°(s sqcvs aers cusic rqao)qs aEf , 8) ALL oN-SITE SANIT�RY SEWCR LINGS AIJD LATFRAI..S SHALL BF S118,lECT TO �o °�',�s srn�ioASO sacunce.noN nNO sunu nnaiN n smcNCrH ov 3,00o a.si.iN sa�nvs .•n.• BUILDING OFPARTMENT APPROVAL PRIOR �0 INSIALLATION. �- - J.GROP INLFTS li�i$TAfLFII SNALI flE r�ry OF CUPEP.PNO ST���DPIiD UNLLSS 07HER1'�iSE .. . • • - � = �� -�°`'°' 9 UTILIZE BEST IdANAGGMENT PRACTICES BMP's, AS REqUIRFD '3Y THG STATE U vi : 1ldiED U�1HE YlANS.iHE 8(1XES SHALL BE INSif.LLm AT THE SN.�,E 111.1E iHE P.0 C,CURB RND - � � � � � GUTTFR IS INSiALL[�.CLh55°A'f'.G.C.SliAll aE USED.ALL�ROP INLETS IYIiHIN THE PkOJ`.CT WATFR RFSOURCES CONTROL BOARD,FOf2 ANY 11(;TIVITY WHICH DISTURBS SOIL. 'HALL BE 3TENClLE�"�10 DUkAPING Ft0415 TO�AY'.SiENCILS TD OE PRON�]E�A'( � � TNF�itt. • • 10) NO HIIISIDE GRADWG SHALL BE PERFORMFD BETWEEN OCTOOER 1, ?011 TO �� 10,A fAINIMUM iNICi<NE55 SLf(6)INCHES�F P.L.C.SHAIL BE REql11Fm FOR � AI�'R�L 1J, 2012. � GJl.INERf.I�L�RII�VIAY MPROACNES AND FlVE(5)FOR RESIDENIiAI.LOCAl10N5 � I I ALL ROOF ufi�1INS AND O SIIALL BE�EIERhIMEO P.910N TO 1ME INSTALLATION OF THE CUF05.RIE DRIVEIYAY SMALL BE � � R OOWN SPOUTS SHA1� RFLEASE TO GROlJ�VO SURFACE y� iNSrnLLEO Ar n�e snFiE tin�e ns nfE cuae. _ VIA SPLASH BLOCKS. ALL OTHER DRAINAGE SHALL BE ALLOWEG 10 SHEEI hLOW fU � ��'� u.au srweei cuaes<_naLL se vEencn�r.c.c.r,ueRS. TUP OF FENCF HUNG W17N A PERIA7ETER SWALE. THE FERIMGTER SWALE DRP,INS INTO RETENTION CHAPABFR �'�I1H � -Z� FLUDRFSCENT FLAGCING TAP6 TFI[OVGRFLOW GOING INTO CITY OF CUPERTINO STORM ORl�IN S'lSTEP,9.. I I � 12.Il�SiPLL CITY OF CUPEftTINO SIRFEi NAI.1F SiGNS,FOLIR(4)OlA0E5 EAGN PER - �S56AF1_Y AS 5l1015N ON iHE f'LANS. EVERY IO FEET. '�� � 1},11VSTAlL CITY OF CUPERTINO STANDARO�AqJUNENT BO%(ES)AN�IAONUMENT(5) Fi� CHAIN LINK OR �LDED NIIRE MFSH � � �EVIATI�N o °�°W . AS SHOVSN UN'IHE PLANS. i � iJ.ALL PRA�E STAKES M!D UiHS HEOUIREU�Y THE q�Y ENGiNEEk SkiFLL 6E '� INSTALLFO e'l THE COIdTR�CTQR'S CNGIN[ER AS DIR[CIEII,h11NIMil!A OFF-SETS FOR CUT �E� EHIS IING S�AKES SNAIL pE FlvF(5)FEEi.CONRtACT04'�ENCINEER TO CERTIFY IHAT LGCAltOf15 O�ME14 � sioe�va�!�.cuao ntio currea is i.v accoaoarace vaTM me arvaoro r�n�us. �N� NEW ' gW BOTiOM OF WALI . I ra,anioa To coubtENCU�r,�4npk,tf{[conipnciwt srinu iinvE cui sriEEr;,��paoem 8'FENCE POST OF 2" DIAMETER A� ASPHALTIC CONCRETF '� ev THe att�NCwEea.rianFV nie att er�ciweee nsro��)woeKir�c onrS aeiaN To . � PLACE FENCF 3 FT. BEYOND DRIF LINE -� � CONCRETE � ac4ulainc�iNSeECnon. � I GI PIPE UR T-ANGLE PDST. CONC DRIVEWAY � DWY , i5.nie ca�imneroe sHnu sue�a;r.n vreinem P.eouesr rors n,va�iNSPeenou. � EB ELECTRICI IY BOX I 17.OFlE POVN�VF�ISPERiI�IC dL��N SHAIi tlE MIXED 1'N�M EACH CUBIC � EG ��ISTING GRl1DE � ���. YAH�OF COHCREiE AT IHE BATCN PLANT. FF FINISH FLOOR � �I 18,GRh01NG OFlOT�OUT510[CF f!/V'I AS PEl TITICAL SECTi�N TND F�R CRQ55-S�GTIW{, ����\ FINISH CRADF r � TRE� PR�T€��I�PI �d�gE� F� � SHALL 0[CO!AFLEIE�qIJO AFPROVlO NY iHE CIIY ENCItlElN BEi�>itE PN�c',EEUInl4 11i1H FLOVJLINE PHEPARA�O`J OF 1HE SI1R(;IiAf1F.ANfI PLACElIENT OF SIIRFAf.F STRIICilIF�S ON IOTS.ALL 1075 GR �+RATE SHntl 9-GRMEQ TO-FIEFSiPEET EiEYATi011,aR AS SHO\1"J Oti iHE PLAMS,OR AS DEIERMNE� �� c GROUND ' ov Ne G1r EM1GI�ietK i. A-IL UEV��LOPER SNALL IN5TA�L iNE"TREE PR01FC➢OM'bFVICES PRIOR TO i}!E START CF GRADING GRO t5.nonrv n+_civi��ciN..e�nra(_)woanua[�enr,ui aovnNCe oF eE4maeuc 3' OR CLEARINC VJORK �pIV INVERT IhE CITY RESERVES 7fIE RIGIIT TO I,,SUC A,"�TOP ilORI(' NOTICE IF THE"TREE PR07ECT10N" LF LMEAR F�001 SERV�CES FOR FlELO 9TAKING.AT 7ry15 11ME,RIREE(3)GOPIES OF TME CllT SIiEET3 VNLL BE DEVI(:ES ARL�IOT MAINTAINEO PROPERLY, M�X, NAXIMUM �. Fuerur�eo. - HtINIhAUM � 3.SEE THE PROJEC7 GRADING PIAN FOR SPECIFIC 7R[ES THAi REQUIRE PROTEC710N. ALL SP[CIMEM P,11N. 20.a��srar�oaeo sraeer rm»waeuTS,�oi coeNea PiaES,nruo omeR veaa�nwerar =, � - TREES REQUIRE PROTE�,710N UNLESS OTHER4VISE NOTED. N.T.S NOT TO SCAIF . lIOMUP:�ENTS OISTJP,P.FO Ol1RINC COMSTRVCTON Sf1AiL 0[RETLpCC➢�UORE ACC[PTANCC Of ' R_Q_W RIIH I-OI--YIA�'( �nE I�.IP�oYrnENis e'r 1tiE c�Tr oF cUrEanr�o. - - / 4.�YO ETCAVAl70NS N�T4lN"THE TREE PROTECTIO�V AR.A"AI2E AL�OiYED UNLLSS UNOER THF_SUPEftVI510N Sp�.� STORMDRAIN CIf.ANOt1T 1 OF A TREE SERVICE CO,UPA�IY". STORIv1DPAN MANHOLE �' ��- 21 IdAMMOIE FP.NAIES AN�COVERS SNRL�6E 6ROU�H'0 FlIJISH GRA�E DEFORE FlfJAL \ � 5. A�J'i FlLLIMG V�ITHIM'NE"TREE PROTFCTION AREA"SHALL BE DONE IN ACCORDf.NCE 4',1TH A OETAI!ED SDhiH �/ SANITARY'EWER CLEA�vOUT �A�N�' / IMPNOVEMENi YLAN APPROV�U BY 1HE CITY. SSMH SANITAR(SEWER �uIANHOLE �'� z2.N[cin sHn��Nnr r��casrs oF�noisnee-oeHSrv r,uRCes(cntr.�sr r�o,siee) / 6.NO TRIMMING, rUTT1NG NOR PRUNING OF DESIGNATED TREES f,4N OCCUR WITHOU7 A REGISTERED SW >IDEWaL( . ANO nr+r a�ee hsn;r.eQUiRF�ov n+e citt�NCCm�rn ouaNC smecr co,vsmucnau. TREE SERVICE COldPAi I'(. 'EL�FHONE BOX . zs.n�PrcovA�or TMESE ptnNS ooes Mo*R�Eqse n{e r,eNrnacrat oF n�e aespqv�Bna�rv 7. CONSULT ORDINANCE 778 OF THE CITY OF CUPER71N0 FOR PERMIT REQUIftEMEN i5 ANO C%CEPTIOMS. T� TOP OP CURB '. Fok niF coRRECnONS CF�nl5rnicE_.FnRORS ai o!AI551oN5 iHE(tEiN.IF,DuniNC Th1[ 0. qPPROVED WOO�CONSTFUCTION IS 4N ACCFp7�qC1L[SUfJ`_;TI f��7[FOR THE f.HAIM LINI<FENCING. 7P Tpp OF P.4VEML�IT - � �� CO'JP.SE OF CpNSTRUC��'V�F 1'.IPROVF!�1FNTS.PUaIIC INiFRFST FFM11RF5 A hiOfliFlCAlION l?F/GR T�'PI��L �'��� ���T��TPQB� ��TAIL � A�EPAR'NFE�RO}.1 THE Cii1'OF CUPERTIIJO SPECL�ICAi16)1 O?1HESE IAII'ROVE�I'cPIT 1'LANS, 7y(�. TYPICAL THE CIIY EiVCINEER SH�iLL HA\'E T4E AUTNOfiITY TO REpUIRc'5UCH AIODIFlCATIOf!OR DFPJ�RNRE 7W lOP OF WALL � AND TO SpECIF�I'41C NAN�IE(?IN Y1.-IICH THE SAkIE IS TO BE COM�LEiED. WAiEP. METER � I N@A 2q.FOa nu Fl��(s)FaoT�navaunuc sioc4�ra�xs,au nae rnoaFrvis aNO eimmnuees W�� 'NATER 4ALVE SI�IALL PE I?iSTALLED OtHiIVU SiJG�4FLK . �. 25.IT SHFLL�E Tri'c RESGON761LIt'i GF lHE CONiHFCTOR.PND ALL SIIB�ONiHA�TORS i0 IN511HE �, ,i. iNEY AFE FUkNISHEt�15fIH AcPRavEG P��NS oR iHE LATES�R�/ISEO PNNS. q� � I, ..� ^G.AlL{VATER LIMES.VAl�1E1.HYUftAN��.PND Af'F'URiE��ANCEJ THERET�I�YSfALLEU 11',INIt! � ����d'A5� � -__- ..... I �THE CITY CF�I1PCI3TIN0 I.It1111CIPAL'.YATER UTILJtt'S 5'cFNCE`.AREA,SHALL BE TH[PROFERTY f���' A tl 5� 0�SAID V;AIER U�ILIIY. � ,� EXISTING PROPOJED � UESCRIPTION � 2l.CONSRiUCTICN 5!GlING SHRLL BE INSiP�tED PRIOR Tp BEGINPING OF�TORI(. �� � uniES souo uNES � � i 28.APIV AN�ALL STOfiA4 DRAW IJNES INSTALLED AS PART OF Tf1E VIORI(ON TIESF.PLANS SHRLL BE - � CLEANE6 Of ALL EXCE55 lAAiE:RIAL,OEdRIS AND OBSiPUCi10N5.SlllfiM UNES SHALL�E RU51{E� � AS DIHEGIEO 8'/iHE Cli/[NOMEEft. I - �-- SANITAP,'!SEN�CR ANU FLUSHING INLET � ( [9.A��N[v!E�ECiRir,nL sF2vcF(por�R-FHGNF-cae�f)SNAt.t 9E UN�F.ftcarniNOF�. -- , -- SANI?ARr SEWER Ahl�PAANHOLE � , ( 30.TO INIIIF�iE 1`!!HELEASE OF 9C�,D5 CpNT�CT PUBLIC WOR.'I?ISPECTOR fOF Flf1A�INSPECTIO��. . �F- � � � 31.PRIOR TI�ElNNi�G ANY 1ANM1 N17HIN iHE FUBLI(:RIGH1'OF VIAY,!H!CONIH/.CfOft WILL dE - ��,--- ��- --- STORFADRAIN AND M�NHOLE ..�"a" ' RESPONANLE F0.4 PULLING AV EVf,P.0�CH4',ENT PERIAIT FROP.f iHc PUBI�C WORY.S�EPARTMENT. � � CJ STOR�U CROP INLc?�N�7STEf.'AL !-- g�� � .'� . �q v a.� ; ,. __.. 1-_ ___.. _..�._._� 1YATEP.MAlld � �__� e . c � 1 1I�9 � - FIRE HYDRANT "�° � ; �am � ;; � , j _ _ _� _. � curze aNO currEa � � � ' � k�..�"'✓ �� � !�d ��,.a-' - ,-- � �� . � � i j� �� � --,�=-�/- E�EC:ftouE�t vnn�coNOUii � � i �t --- -- ----- - ExisnNC�oce or PnveueNr �l-� �" � ' ` ciTV c�F �uPer�zi�� ��PR�v,al �g(`�;p (� -- `�' � '= 9V4!9 lf � �Q�� ---- � �-- i--�~-+ re(waTtR? � �� � �, �° - . °'� �,.� � �� �� CROSS WAiER j APPROVED: � .„„ -... -. .. � ) r� . _ i r' i � � . `5 DATE g� � GAS lJ IE . „ _-'- ,[p16 __ � '�, °, iibipd ocr�oeN,ar,e assiz,exFir�es: tz/si/iz ".p . ------ ---�- sev�a�nTeRa� ':,,�.,°: orT. 2oi� �, o1REC;TOF oF PUBLIC WORKS �� � _c� AS�SH014N I� a� .�,.., JS �.�.. ���� ����� � . ,�,L�r RAIN50W - SMEET NtJ. DESCRIPTlON t � � SH[ET 1 CUVER SHC[T ""' p i ��, SHEEi 2 �RADWG& DRAIN'nGE PL4N � i SHEEI 3 DRAWAGE DETAILS ' �SI1EE7 4 EROSION C�NTROL PLAN _p � �,,,,i., ; ; � 164 _ _ _ _ _ _ � _i I r i � REVISIONS BY� ; �� �'��_ __- __ ,�i �i;��'���� �� � � r'� j i� � �� � I I f J� � � �!� � I �� I��� � i� ; � ��� i �� ��l CONSTRUCTION NOTEJ: � r� - i ' � l � ' � ' , � '� i r � �' ' i �� � �� �XPORT: .317 C4J91C YAEtD � � � ____ i � �� � i � �� � j � � � ��� j � � � � ,� � CONSTRUCT GRASS SWALE PER DETHIL 1 ON SHFEf 3. SEE GRAOING PtAN OP] SHEFT 2 '�� i J �! � �+ ;' �1� � i� �l � ! �i i l� i l �!1 1 � �� f i i � � IMI'ORT: 0 CU91C YARD � FoR F�ovnwE e�tvniioNS. � � � ��. r� �_ __� __/ � i i � i r i ; ; i � � r : I � � � - � ! I �` � ,� �� J � �� � � il i ( ' f ( j_ � � � J� l �a�' EA{$TH SYORK �UANYITIE� SNC)NIN R�E � INSTALL 36 IWF.AR FEFT 36" DIA�6ETER PVC RETEN�ON P!PF PER DETAILS ? &3 ON SHEET '' � � �- - "- _- -�"�� � / � � � ' �' � � ' � I r' J� � � j i j � I � � ' i i� (� i� i �� dePPR�XIMA`PE. 1�' SHALL 9� C4NTRACYaR'S 3, wi7H s�OPE= o.U%. I ' � � ...� �� ... -- � � ���--_ ,____`��� ! o � �.ST IROA CRATF SFF ('RADI7JG '' � � ' � � I j � �� � j ; � � 1 j � j ���i j � J � l � �� R�5pOR15181UTY T� INDE�ENDEfdTLY INSTkLL CHRISTY U21 DP.AMAGF INLET N11TH I_IGHT D�JTY C.'' ; I-�-_�•�� ��_... ��.� ..,�___.___-___ � ;�� �O �� �� i ��,l I i� �� i' �1 i�� I��J ,� % ��� � ��,,�I�i ! ;� � ���.-. USEIF�AT� �L�ANTITIES FOR Hlse'�H�R OYdN U PLAN ON SHEEi 2 f�OR GKAIE AND INVERi ELEVAlIGNS. �� , _ ...._ , � � � '��� �-_� _."� ;�� j � � � ( i � I i i �' l I ' �� � i � �� � � � � � � � � �' PROPOSF RFTAIPIING 4VALL WiTH DRAIN ROCI(, RLTER F.4BRIC AND 4" SCH�. 40 PVC _ -� � � �"" �j ( �' � i J J � � � � j � � j �� f I'��-' � PERFORATEO PIPE ON TNE OUIER PEfiIMEI[f2 OF 1HE FEfAfN�NG.WALL F012 iHE BASEIdtNY- �� � � ,� � �� � , I I I 1 � I � j �� � i � I I � , �� pER DETAIL 3 ON SHEET 3. SEE STRUCTURE DRAW�NGS FOR ALL DETAILS AND � � ,�� �\ _ ' � i 1 � � � ; � i � i � � � j � � � � � � � i ! t j-"� SPFCIRCAT!ONS OP RETAIMI�G 4i'ALL. i � � '� � \ �� __ � r+ r / �' I ' ! �l � I I � ' � I' � � � � `i ��T-. i \ ���._ � \ � � + I � � ! ' � i � i ,' � �� I � i � ' G INSTALL 4" DIAMETER PVC SE6VER LATERAL°IPE U,9iN 7%PdIIJIlo1UM SLOPE. �- � \ . o l j i �I ,� ' � I � ' i , r � � �' i i I � I+ I' i � � � ' j ;� i'„>\ �' � � . ����� ..._�.� � �_,' '. �,..�� � I r I � ' I 1 � i JJJ ; '�'� /� i� � i rf �� '� ( I j � 1 I � i I i � � j ; i� �� � � rT� �O CON?RAG10R SHFlLL PROiECT TREE CURWG COPISTnUCPON. SEE TBEE PkOTECl10N DEli11L c U � ; �, ` _.__ �� ... �' \ `, ____... ' � j i j r l i � � � � ' � ; � , � ' � � � � � ' '- ._.___. ON SFIEET i FOR MORE IMFORMATION. Rj'>,' , ____�/ ' � , % \ ; ,_ �,\ % ' � � , ; ,'' I i ' � � � ; � Ii � i �-,,. _ � t oE / � , i , -_ �\ �%� � � � 1 !, � � �� � � � � � i � � I � i � I � I I � I J � i l�� �b �I� \' ���� ' � � I' o i I � � i � � j � � �! O RB�dOVE EXISTING TREE(S)AND ENTIRE ROOT SYSTEhf. CONTR,4CTOR SFI�LL�3flCKFIIL WITH � �,. �__- -.-..._. ..,.,.� .._..,. ,.��--_ -�"� ; � - , � - -...,, -„ ' �: � /� vi l� IJATIVE WIATERIAL AIvD COMPACT TO 9.>7 REI ATIVE COPdPAC11CN. ' I __'- `__��` � \ � _.._ ' r� ��� j 'r ;( I, ,' '� � j� � �R j � I i j ' f � � i j j J� � I � � +�/� % f � X� 20 iQ 0 10 20 � ��� ,`�'� � 1 ! i ; '; � � -- �,� . ` '.'-�_;�; _ -_ ,- ,!� � ,i ! i! �i � ; I � ' I+ ' � I � ! I � i �! ; I � ' l i l� \ _��'.' SCALE: "I"=10' i �, � r �, _ , , � � � � i � i � � � � � I � i � � `\ a�� a, s i I, , ' � ^� I I I � � i ! ) � I I I I I ( �� �, i ` � 06 PROPOSE SLAB ON GRADE Wlili 72"CONCRETE SLf�B ON�12"BASFD COURSE - � ` N w ---, ° ., � �� _ - �� _ `_��� ` _ / /�;i�i� � � � (. j i j j ' 1/ I � �� I J � I � j i i � I I I � I. I IV � `� 1 �R.' !_-i,.,, / � FOR GARAGE a1ND PiOUSE. SEE STRUCNRE l7RAVANGS FOR pETAiL.S'. ��� �.a� i�� r �. � �� � _- � _ ��__ 1 � i �� � � � , + �;� _ , - %; � v� - _ � .....�� " . �' � '�� I � � �\% /�?� � PROPOSECI QONT91JR5 v �o � __- � ��� � _�_ � i i l i ��fd� � � � ;� j I i � I � �� � ' � i � �I �� ����.1_�` �-� ya t ' / i � � i r,, !+ q c ., _ �I f EA�TH �d�RK 2UA,TI7'IE� ; _� , ��� � __ ��.:� �__ --�- % � � ' � ,, i � I j � `� ,� � , �i� ��� " , , � � ���. , -- � ---- '� ` i i ,�; � � i I j � � i j � � �i � � �/ �( ;'% ������ i �I i i''%� ;'�-� i� , � - VOLUME CUT VOLUPAE FILL � �s�u�,� Q ' �._ - � �„ ,�`-. .-, � _-- ------....- _-- I I` I ' I ��� � � �� � � � �� ` �V � � / � '% � ' , 1 ��� � � s L --- ��_'_-�--_ � ��� l� l I �� � �� �� i I � � I I � � 1 � i' ;'�' /�� ��'�� � i� _� �� i � �.�... (CUBIC YARD) (CUBIC YARD� U�n _ �� �___ . � _.,_ _ _ � ...._.. . � 1 i �� l `�l _ i � /� � I � . �., - __ _ --- -- o __ _._ ,' � _ � i - ��'�--- ' i� `' .' ��,' ... �' , : i � � � i i l%� ,i �',�, � �'I ...,� . .. ..., .. � �' � l� I i �' �� � � � � � o �� �� v ) ��) ����.� � ���� i. i � r� � �%'- DFCI< U ?1 i � I ._'-- -' ... � -. , _..,.._., ��....., _--_ "__--_" � � y_ _ ii � i� i / !���..' i ; �� i ? i I ��.,_ BASEMENT 504 .._� J �n I , � _ �� . .� ._,_.. 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RAINB04Y I - - - { i . . . � '_i \ . .-� �. ._�._ _�_� _�_ 1_ , :� . ; : ..� .. .� ` ., .. -, \ � - `- � . �._ , . �., , �' �� > .._. . . _ . _, �. �, - �, . �. , �, . , �' ��. .. _ �-- �_ i . .� - -�_' . , , � .., � . `� _ ',. , �_�.. . __ _ __�� _�. .��.� �„�� . . _� —�.�.�- �_�`,.._ _ n �. ._- �._ ____ ___ ___— _.— � I , _ ( ... m a � � , �, f �� � � � ' � _�� ��.�.� -- ,. �' 167 OFFICE OF COMMUNITY DEVELOPMENT CITY HALL 10300 TORRE AVENUE • CUPEPTINO,CA 9501�-3255 C V p E RT�N Q (�08)777-3308 • FAX(408)777-3333 • �lanning@cu�ertino.org Subject: Report of the Community Development Director Planning Commission Agenda Date: Tuesday,June 12, 2012 The City Council met on June 4, 2012 and discussed the following item(s) of interest to the Planning Commission: 1. Lake Biltmore Apartment Expansion (DP-2011-05, ASA-2011-19, TR-2012-13, DP-2011-06, ASA-2011-20, TR-2012-18)- City Council continued the project to a meeting in August. The applicant is to revise the Biltmore project to include approximately 60 apartment units instead of 80, increase in the number of parking stalls, and increase in the amount of provided retail/commercial space on the Stevens Creek site. 2. Upcoming Dates: Date Event Time Location June 7-July 12 Summer Concert Series Thursday Evenings Memorial Park 6:30pm to 8:00 pm June 14 CPEST Awards 7:OOpm to 9:00 pm Communit Hall 168