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111-J. Letter & Opponent's Accoustical Report.pdfRe. Application No. M-2010-02/ Location: Oaks Shopping Center Oct. 11, 2010 Applicant: Sunnyvale Holding, LLC & Modena Investments Modification to a Use Permit to allow commercial enteftainment establishments & live music & & to extend hours o e 2-00 am. Dear Flonorable Members of the Planning Commission, Enclosed pleasefind a $7,00O.Acourt cal Study froni a top San Francisco acoustic consulting fimi that provesDEFINITIVELY that bands performing until 2am will bre�ik Cupeitino's night time thresholds of 50 --- 55 &3A, on site) and will be heard across the stTeet through bedroom windows. The Applicant is applying for FOUZ (4) locations at the Oe-dcs Shopping Centerto handle multiple sources of live, ban ds/2am closings and liqt.wr at all FOUR, (4) locations. We continue t9 ask the question: "Why 2atn? Why is 2am so impoitant? It can only be because the foiva (4) pr6posed liquor -oriented activities that involve bands, liquor, and 2arn closings Care wbat the Applicant n d.s to inflict on the neighborbood to bag a pool hall, a liquor store, another b,-riMiquor ntertainmerut hall etc, Sm.cerell A.- Bi-ian Ave arna g Ruiner, Glenbrook Apartment Homes, 10100 Mary Avenue, Cupertino "'h, �1,a"(Uisd'vig 1C"T111 e�1V(e 0e� die o'f0'-jpe�,-O'-',io f fi,,.,')s� e r, i i pero� �s s�,-Ir,',' �'JH C.""r C h a r I e s M S a I t e r A s s o c 1 a t e s 1 11 C ConsolLants in Acoustics & Audio/Visual Systemi Design Since 1975 130 Sutter Street Sari Francisco, California 941.04 4153970442 Telephone 415 397 0454 Fax Charles l'ter Assoclat e s In 11 October 2010 Audiovisual, r w"'Im a r.dliroii v vm fi, , fr:n I ). ,i v Glen Brook Apartments ( ,v <;,fflu did 1.0100 Mary Avenue mk YM Cupertino 95014 (;�[h mi r)r ()19 l')e 4 11, ,) ,) v,H" Subject: Oaks Shopping Center Noise study, Cupertino, CA J ar d, , ' )1 0,45, I CSA Project No. 10-0406 A, ` I I 1 -1 wf vvv, Thank you for providing us with the information regarding the subject project. We have completed our environmental noise analysis of for the subject project. This letter Ai) summarizes our findings and recommendations. INTRODUCTION As you are aware, the Oaks Shopping Center across Mary Avenue has an event center that is available for rent to host a variety of social gatherings both public and private. In ,.� I J addition, there is also a vacant Storefront at #610. A recent petition by the Oaks v - . 1 . v, J- Shopping Center seeks to extend its use permit to allow activities until 2:00 a.m. at these locations. We understand that you are concerned over potential noise w � disturbances at your apartment homes, specifically Buildings 4, 6, i, and 8, which , 1, A, : i. lia.i directly face the event center. Y Jd, HM O N, AcOUSTICA.L, CRITERIA w , j )A -� Applicable noise criteria may be found in the City of Cupertino Municipal Code, P, Section 10,48,040 Daytime and. Nighttime Maximum Noise Levels. ".Individual noise sources, or the combination of a group of noise sources located on the K : r r e same property, shall not produce a noise level exceeding those specified on property r � ` v i J )[ zoned as follows, unless specifically provided iii another section of this chapter:" w( Land Use at Point Maximum Noise Level at Fs of Origin Complaint Site of Receiving Property Nighttime Daytime Residential 50 dBA 60 dBA v„ �, vv Nonresidential 55 dBA 65 dBA Glen Brook Apartments I I October 2010 Page 2 The municipal code addresses noise in terms of the absolute nurnerical value but does not consider the characteristic of the noise. The State of California model community noise control ordinance has a provision for the "correction of the character of sound". If the alleged sound source contains steady audible tones, or repetitive noise, or contains music or speech, the standards limits set forth shall be reduced by 5 decibels. See attached appendix I for the State of California model Community noise control ordinance. Apart from the objective city or standards, there is also the subjective aspect of noise as it relates to the existing background noise levels. For this reason, background noise measurements were made at the neighboring apartment homes. MEASUREMENTS To quantify the existing background noise, a sound level meter was deployed for 48-- hours to measure the noise around the adjacent apartment homes. The main source of noise was from traffic along Highway 85. Average daytime decibels levels range from the high 40's to low 60's; nighttime decibel levels range from the high 30's to low 50's depending on time and proximity to Highway 85. The primary acoustical concern for the event center is increasing the nighttime noise levels at the neighboring apartments (180 feet from event center) and at the adjacent commercial tenants (30 feet from event center). According to the noise ordinance, activities from the shopping center should not exceed 50 dBA at the apartments and 55 dBA at adjacent commercial spaces. While the City of Cupertino does not have a. correction factor for the characteristic of noise, we recommend that the correction be applied for this project due to the high probability of music being the predominant source noise. The reduced nighttime limits would be 45 dBA at the apartments and 50 at commercial spaces. There are currently two possible event, locations: the event center and the vacant store front #610. The types of events at the community center could vary greatly froty) weddings to musical performances. Storefront #610 could become a billiards hall or lounge with live music or karaoke. Each event has different noise characteristics and volumes. To demonstrate different noise levels, three activities (dancing, karaoke, live jazz) were chosen and measured. These noise levels were reduced to simulate noise levels through single pane glass and input into a computer model. The resulting levels at the apartment complex and adjacent commercial space are presented in the table below. ("', tt a iir I e, �,,; M Say It e r A, S S 0 ("", i a,i t e S M ` ;[ Hm tm(�t ` �l ffl(500 ;o(l lI I'll I(J"( (I ( „hrf)[ [ m� rWl Od I rd /H 5 �Ml �' 04 d'1, ax, AH M / O,P)/l Glen Brook Apartments I I October 2010 Page 3 Type of Noise Estimated Noise Levels (dBA) Through glazing At apartment At adjacent bedroorns comi-riercial space Dancing 74 dBA 38 dBA 59 dBA Karaoke 63 dBA 27 dBA 48 dBA Live Jazz 68 dBA 32 dBA 53 dBA Of the example noise sources listed, two Would exceed the penalized nighttime standard at adjacent commercial spaces. All three examples would comply with the penalized nighttime standard of 45 dBA at residences. If all three events were occurring simultaneously, the calculated noise level would be 39 dBA at the apartment homes and 60 dBA at the adjacent commercial space. While the residential standards would be met, we believe the noise from dance music would be clearly audible at the apartment homes because of the type of noise and low background noise levels. Modern dance music has a repetitive thumping or pulsing of bass notes. This would be equivalent to the "booming" noise as in some car stereo systems. As a condition of approval, a full scale noise mock-up should be conducted to establish the limits of audibility. This test Would serve to protect both the event center owner and apartment homes by establishing realistic expectations. In addition to noise inside the shopping center, there would most likely be noise from guests leaving after a late night party or other social venue. Engine revs, "chirping" wheels, shouting, and car stereos are noise sources that may occur much closer to the apartment home bedroom windows. The noise levels could exceed the City standards, but much more difficult to enforce. This concludes our comments on the subject project. If you have any questions, please contact us. Sincerely, X' I i Mr, if, I Ill, IF a 1111111 1:111111ir" Eric A. Yee Principal Consultant EA Y 11:\CSA_Projects\y20 I 0\ I O-Oxxx EAY _Oaks Shopping ('.enter acoustical study\ I I oct 10 oaks shopping noise study. DOC E"Ild, IM Salteir Associates UdMumi�lfVHN rfl a I MODEL COMMUNITY Ndk;W CONTRO-L,,,, ORDINANdE PREPARED BY OFFICE OF N&m-CONTROL CALIFORNIA DEPARTMENT OF HEALTH 2151 BERKELEY WAY BERKELEY, CALIFORNIA 94704 pan M SECT ION 7 E X T 117 14 1 OIR "I 10 1 �z L I --'NFORCEMENT PHTLOSCPHV.- The �h,i,� zdd,,te.s,s t �ee�, to , vvt aInd ,zbovo thi) ito,ise �xi_th Ct ambioit't Obtti.(s"LL'�Zy' th.e am- 0'L?nt no,6e' va'14.(�s tivtouonoty't tke commt"&tl apon I u'_q;uvays, popu.Zztt.ioo. dojis,ti y, e.and uze, etc. sve .,se.4-. s.tandatds Got va)tfou5 segments oj th,? Sapposerd Ito 'te ,J,e,ect Hte ex.i54inq day ,tj,,,d vi1'.qh.ttiyne anbiemt ,tvZse e,?_vet.6 . The ambivnt nc.i,e C,,)ve' 4;'6 'Aeej,6ied in te;tpo oi dz,�c,q,.be 4'he -tota,c' no,°,e occtutx)ia OPP 1.0(vte�q time veti.od. A no.�e .6itui,&ton is then ju_dged by (.�ompa)ii.ng tjie ajo�tementioned no,i-se, wZdl .the no.i,se Sou/tce on, vs, .0hese wZth the no,6o. 60U/Ece 044 ,P , , (tire cupbien't) Viotat�ons o� t-he r Lcti,nance rvtovi,!,<.o" may Men be cited 4,�jt teAxt6 cj p��,,t6c.utaA Zeve.�6 exceeded cA, 4.n tteAM 0� tile tenqth oj.tome the -d nx,,iu6ive nf�,S)_se exceedied theke the no.r,se ejm.wn -standaA&s az eZs,ted hei.o-iji shaet con6t. .tuts e�- 6uLtZvn o,� a no,ise d&stu)i.ba,)ice., 7 , I tMAXIMUM PERMISSIBLE SOUND LEVELS BY RECEIVING LAND USE: (A) The noise standards for the various categories of land use identified by the Noise Control Office(r) as presented in Table 7-1 shall, unless otherwise specifically indicated, apply to all such property within a designated zone, (B) No person shall operate or cause to be operated, any source of sound at anv location within the incorporated C1 ty (Cowtty) or allow the creation of any noise on property owned, leased, occupied or other-, wise controlled by such person, which causes the noise lovel when measured on any other property, either incor- porated or unincorporated, to exceed: -20- (1) The noise standard for that land use as specified in Table 7-1 for a cumulative period of more than thirty minutes in any hour; or (2) the noise standard plus 5 dB for a cumulative period of more than fifteen minutes in any hour; or (3) the noise standard plus 10 dB for a cumulative period of more than five minutes in any hour; or (4) the noise standard plus 15 dB for a cumulative period of store than one minute in any hour; or (5) the noise standard plus 20 dB or the maximum measured ambient level,, -for any period of time, (C) If the measured ambient level differs fromthat permissible within any of the first four noise limit categories above, the allowable noise exposure standard shall be adjusted in 5dBincrements in each category as appropriate 'to encompass or refloct said ambient noise level. In the event the ambient noise level exceeds the fifth noise limit category, the maximum allowable noise level tinder this category shall be increased to reflect the maxinlurn ambient noise level, (D) If the rre.asurement location is an a boundary between tw(j different zones, the noise level liPlit aPlicablf.! to the lower noise zone plus 6 dB, shall apply. (E) If possible, the ambient noise shall be measured at the same location along the property line utilized in, 7A (B), with the alleged offending noise source inoperative. If for any reason the alleged offending noise source cannot be shut down, the ambient noise must be estimated by per- If'ormi rig a measurement in the same general area of the source but at a sufficient distance such that the noise from the source is at least 10 dB below the ambient in order that only the ambient leyel be measured. If the difference be- tween the ambient and the noise source is 5 to 10 dB, than the level of the ambient itself can be reasonably dotkir- mined by subtracting a one decibel correction to account f(,r the contribution of the source. -21- IISCUSSION: I shou-e'd, be uuido,�,6--ood -zat t`ze 7 . ( P T,,, b Ze 7 - I qpAl.e.6Ft al,5 iwt to be i?-X-- (,,,eeded mo)ie thavi 30 tn�,mLtm oot oJ etwit hors, ( 5 0 % o .,the sa,mpte tt,)ne opt LeO eevetls) , r,utd that 6e sub,,Seqwnt t�jne chu,wt,on. adim,bients g,iven 61 7. 1 (B) 'he 2 Ji t n e J Lq 5 e,-eue�- `5 o 15 Mit,Ytaate.s CCa.t o A rJte L - S e 3 e tt.n9- 0,�, 21' mixtLti),S ou�-t of L 1 e- v ez I. c h e I 'me o-,t I m�',nute out o '0)6 ie tbne) . Whi,fi �-, maywat eohm�quo,5 �Uld dt�'Lo eevce, �0% o� t,f oney a soundeevet meteksand a Stop waZ/t Ct it e av a,+ abte 6o& c'tccwutte dete,lrmtinaton o4 the,6e, vatue/s, &i-4 type anaLlq,5.6s Zs best accompZzfhed by meams o a mate SoPhZ- tica,ted no,6e dcLta .W&tw 6nvotv.619 e Oth eA j,4,aphic ieveZ %,,ecctde,q. oA aa,iq,i.-tacom a —ze aZy - 7(,11L i sh(`uid be no 'ed, howeveA, '01/tt c.n "Ite maiwt,4tfe -tepmted com ' pzat�,S, vioeat,,-w ion o6 the 6t&z)V1s Npec.�- ,).�.ed .tn 7. 1 mat ,Leacti-ey be u.�. nq on-Zy a wuAd e.evee moteA. In aU c" m whute the .aAu,6ive noes e Zeve,e is (a,t at cvntnuou, one (ieeds to measwte t'he uo,6e Z e v i?,e ar,d then de,te)umine "Itw many mi.kwtez howt it LN d. The no.i'6e sm-we =,y 0ten be,sho(en 4'o onetl One 06 the -tAndiz,-tcts i' L q�j , L 2 5, 1. 9 3, L I o- 1,0) o SectZo n 7, 1. The. need '.o,t .4the rroim sophizttctted eqtb' (,P- me)ktt comes when Me no.6e sowrce ts not continu.o" btu,' rvtodu.ce,s vatf.y.ixg no.ise teve ovvt the hoa&. 7 .MIRRcCTION FOR CHARACTER OF S0(JND* 2 1 n the event the alleged offensive noise, as judged by the Noise Control Officer, contains a steady, audible tone such as a whine, screech, or hum, or is a repetitive noise such as hammering or riveting, or contains music or speech conveying informational content, the standard limit,s set forth it) Table 7-1 shall be reduced, oy 5 dB. I 9TSC5'SIM The me of comeetioms 'o.,i. tonae. content can ct(urte mea- Stftememt P"tobeer s. I a mo,6t evit ouement the p/te,sence olt, absence o' at: ptute -,tone can be detvmt.ned, wZOt the. ewt. The nQ,t6t patt o� the de. inUixn 'o,% "pwtetone." i,6 iwtLtten to accomoda-te fjact- In CiSeaS ,,oheae i.,-t iw:s ,,iwte dou.btjctZ, Ote temaimZnq jn,,z7,t o6 ;Jhe dej,.bi,aZixn can be wseul "o p"Ieci.-wti, dej,,61e ;1. w,Xme tople. Halvem,(., O'Lls ZattaryI. deP:.)tition t ,eOf44J.V ,' 0(tav -,e Sand ,S Elie 1,�,S e 0 a 1/ -22- Table 7-1 ExTERIOR NOISE LIMITS (Levels Not To Be Exceeded More Than 30 Minutes In Any Hour) Noise Level (dBA) Receiving Noise Zone Classification Land Use Ti me Category Period Rural Suburban Suburban Urban One & Two Family 10 pm.- 7 am 40 45 50 Residential 7 am-10 pm 1 DO 55 60 M L, I te Dwelling T pf 1 Residential 10 pm- 7 am 45 1 55 Public Space 7 am-10 pm so 1 55 60 Limited Commercial 10 pm- 7 am 55 Some Multiple Dwellings 7 am-10 pm 60 Commercial 10 7 pm- 7 am am-10 pm 60 65 Light Industrial Any Time 70 Heavy Industrial Any Time 75 The classification of different areas Of the Community in terms of environmental noise zones shall be determined by the Noise Control Office(r), based upon assessment of community noise survey data. Additional area classifications should be used as appropriate to reflect both lower and higher existing ambient levels than those shown. Industrial noise limits are intended primarily for use at the boundary of industrial zones rather than for noise reduction within the zone. .- 2 3 - ENTERIOR NOISE STANDARDS 3.1 MAXIMUM PERMISSIBLE CIWELLING PJERIOR SOUND LEVELS: (A) I'he interior noise standards for multifamily residential dwellings as presented in Table 8-1 shall apply, unless r Aherwi se specifically indicated, 'w i t h i n a I I such dwe I - lin(is with windows in their normal seasonal confiqui-al-ion, Table 8-1 Noise Type of F i me Allowable Interior Zone Land Use Interval i Noise Level (dBA) Al I Multi fami ly '0 Dln- 7 am Residential 1 7 am-lo Pill 45 (B) No person shall operate or cause to be operated within a dwelling unit, any source of sound or allow the creation of any noise which causes tlhe noise love] when measured inside a neighboring recelving dwelling unit to exceed. (1) The noise standard as specified in Table 8-1 for, a cumulative period of inore than five minutes in a ny hour, or (2) the noise standard plus 5 dB for a cumulative period of more than one minute in any hour; or (3) the noise standard plus 10 dB or the maximum ineasured arnbient, For any period ,�)f time. M (C) If the measured ambient level differs, From that permissible within any of the noise limit categories above, the allow- able noise exposure standard shall be adjusted in 5 dB in- crements in each category as appropriate to reflect said ambient noise level, 8.2 rORRECTION FOR CHARACTER OF SOUND. In the event the alleged offensive noise, as Judged by the, Noise Control Officer, contains a steady, audible tone such as a whine, screech, or hum, or, is a repetitive noise, Such as hammering or riveting, or contains music or speech conveying informational content, the standard limits, set forth in Table 8-1 shall be reduced by 5 d8. (Rack t to 'tion 1, 2. ) h a r I e s IVI S a I t e r A s s o c 1 a -t e s I n c Consultants in Acoustics & AudiO/ViSUal Systern Design Since 1975 130 Sutter Sireet San Francisco, Californka 94104 41.5 397 0442 Telephone 415 397 0454 Fax hcat'les Al. Sallel-Associcaies' ctc oumical and (rtaaliolvisli al c olls°lrltrtazt,� helve b ackgonmdr irr cra iticrea ital , cat r /tltc�c stare^, music. speech, carted lheca e)�° ]"his dive l'sit_w° cr%`expc> talc, e arallows eattajfilwl to provide clicltts lrailoacel yel-vic e w It wide v ar-iety ca(l)mjec i types ill the f'iallutr�ira�w; care ur, .- Architectural Acoustics Room Accucslics - Somid Isolation ° Noiw N lglwotiora Rrdw,lism Engineering Acoustics l�il+realr"raaa .�9arrJle�c .5'gaaredaaaa°-laeyratc^ +Vrri�c= /srr/rrtirara L~grn`psnac�raa 11'oi.ec Iw'c�chad Haan ,stake/Visual & Sound System Design 5pceeh & lt2 oi( Cs'h,i'aaj"m,cenrem - Sound Mr.okira,y a Video C''^ Prrriccritrrr ,5'YVteno - tti9aalaa"larc°clia Seste'na.c li4cror h,lencin'l? ,Sywcnas a /) sia n ct kr arning ('entans Env Ircaramental Acoustic., ("oaraaranaaity Noi,vav C.apo,sm-c hdod0ling Noivc Impact - Noi'�c Mitig"'llion Acoustical Simulation Calilucawd C)eaaronsara^ation of Acoustical 1-mriloaarueno Expert Witness & Public Presentation Jurliclot tla�rarirr, .� - Public lleaarinig.ti Warner Bros, Sound Department nt Remodel Dubbing Stage, Burbank. CA Elferbe Becket, Inc, pkottr of N'mer r tiro";. Bills Plaza Renovation, San Francisco, CA Whisler Petri pho" � D,''vw Wau,'Av Portside Condominiums, San Francisco, CA Tower Architects and HKS Incorpotated 0 i.0 Lois �, , Kuo n,y com�lical 0^ lgillvrring ilv1pv creato, to leduco, dis rtq) timl /i om v s tel ml / mid intermll nd) i's c tmll ribro I imt , 00M (WOU'vif s dc,sil;rl rc,std(s itl to-fi(fdafe coln In till il tt I ioll and plcua scarf liveninp, (,nvhtmnwnt,s. udiolvismil and souwl ),s stcnl.s prm ith, bolunccel tiA havc experiem-e ill public prexenmtiull Jr)I- conmookils, (pod experl liligalioll. KQED, San Francisco, CA Gensler & Associates [11mic, MrG"Ith Oakland Federal Building U.S. District Courts, Oalfland. CA Kapkan MoLaughlin Diaz pier(, Rum. Randall lViuseurn Theatre, San Francisco, CA ELS / Elbasani & Logan and Marci IJ Wong, Architect Dm") vvv'k„N Paraniount Studio M isolation Booth, I,OSAngeI(-,,s, CA Ellerbe B(-,,ck(.,t, Inc. and Pamiount PICUIres Corporation [IhM" Mrod scl,m"o Newport each Public Library, Newport Beach. CA SMWM zynd Jnines Lawson Pirdy, AIA, Inc. pllwo Lucasfilm Skywalker 'Technical Buildlug Stag Thenter, Mcasio, CA Backon Arrigoni & F?oss hml('e At Soltcl- Associo fe,s combine's em'11sin:' exy,te)-ience with sl)ecialiZed emalYsis ca17 bilitie's 11) ltn)vield' acollsfical and andiolvislial SYSt011 design J ( � t , a ) N 411, 400 jwo.jccis San Francisco Museturn of Modern Art, San Francisco, CA Mario BoRzl in association WWI Helmuth, Obata & KassabaUM, WC. pm, o, Rw.sO Ahr'Oh,,m FIRM PROFILE Charles M. Salter Associates, Inc., consultants in acoustics, audiovisual systern design, telecommunications, and security was founded in 1975 and has offices in San Francisco and San Jose. With a staff of 40, we are involved in over 900 projects per year in mile ilia' Jor service areas: Architectural Acoustics: designing room acoustics, sound isolation, and noise control for performing arts centers; audio recording, production/post-production facilities, and broadcast studios; govemiiient/educational/culturaI facilities; airports; housing and hotels; office buildings; hospitals; research facilities; and places of worship. Engineering Acoustics: reducing noise and vibration from mechanical, ventilation, plumbing, and transportation systems; product noise control; and acoustic modeling. Environmental Acoustics: assessing environmental noise impacts from various sources, including vehicular traffic, airports/heliports, buses, light rail and railroad facilities, construction, geothermal plants, and mines/quarries; and designing noise mitigation including sound -rated windows, doors, and noise barriers. Audiovisual System Design: defining audiovisual requirements for media rooms and presentation facilities; developing audiovisual design requirements into contract documents; testing the system's electrical, visual, and acoustical characteristics to document performance; and. training system operating personnel. Sound System Design: integrating electroacoustical systems and architectural acoustics; electronically enhancing room acoustics; reinforcing music and speech in theaters, halls, arenas, shopping centers, meeting rooms, and boardrooms; designing sound masking systems for offices; and designing and measuring loudspeakers. Telecommunications: voice, data, and fiber optic cabling for universities, business environments, government facilities, laboratories and data centers; network equipment and building inErast1'UCtU1'C to Support telecommunications systems. Security: integrating the design of video surveillance, access control, and intrusion detection systems for educational, commercial, cultural, residential, and government facilities to enhance the ability to monitor building spaces and protect quality of life and security of assets and property. Acoustic Simulation: providing calibrated aural simulation of acoustical environments, generally prior to construction, including sound isolation, reverberation, and ventilation noise. Simulations are presented in a Sound isolated studio using current multimedia technology. Public Presentation/Expert Testimony: effectively communicating technical information to decision -makers and the public at meetings and hearings and providing expert testimony as part of judicial proceedings,