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DIR-2010-05b OFFICE OF THE CITY CLERK CITY HALL 10300 TORRE A\'ENUE • CUPERTINO, CA 95014-3255 C U P E RT I N O TELEPHONE: (4C 8) 777-3223 • FAX: (408) 777-3366 August 5, 2010 Re: Appeal of an approved WiM� anter.na to be concealed in a cupola on the roof top of the church, DIR-2010-05, 6191 Bollir.ger Road (APN 375-41-007), Bradley Head for Clearwire/West Valley Presbyterian Church . At its August 3, 2010 meeting, the Cupertino City Council denied the appeal and modified the Director's conditions of approval to require r idio frequency (RF) energy testing by a third party and paid by the applicant, at project installation six months, one year and three year increments; test results shall be reported to the City in writing. If RF energy exposures exceed present FCC exposure standards and any future modifications ther�of, the test results shall be reported to the FCC for enforcement action, the Director's approval ��ill be withdrawn, and appropriate City action will be taken. To ensure resident's legitimate concerns are addressed, the applicant shall post a company telephone hotline number on the base equipment enclosure. The Director's conditions of approval are as follows unless amended above: SECTION III: CONDITIONS ADMINISTE]tED BY THE COMMUNITY DEVELOPMENT DEPT. 1. APPROVED EXHIBITS Director's Minor Modification Appro val Memorandum, file no. DIR-2010-OS with attachments A through D dated May � 7, 2010. 2. NOTICE OF FEES, DEDICATIONS. RESERVATIONS OR OTHER EXACTIONS The Conditions of Project Approval set forth herein may include certain fees, dedication requirements, reservation requiremen�:s, and other exactions. Pursuant to Government Code Section 66020(d) (1), these Conditions constitute written notice of a statement of the amount of such fees, and a descriptio n of the dedications, reservations, and other exactions. You are hereby further notified that the 90-day approval period in wluch you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code Section 66020(a), has begun. If 3�ou fail to file a protest within this 90-day period complying with all of the requireme�its of Section 66020, you will be legally barred from later challenging such exactions. DIR-2010-OS August 5, 2010 3. ABANDONMENT If after installation, the aerial is not u::ed for its pernutted purpose for a continuous period of 18 months, said antennae and associ ated facilities shall be removed. The applicant shall bear the entire cost of demolition and removal. 4. EXPIRATION DATE This Director's Minor Modification shall expire ten (10) years after the effective date of the permit. The applicant may apply for a renewal of the minor modification at which time the Director of Community Developmen: may review the state of wireless communication and camouflage technologies to determin� if the visual impact of the .personal wireless facility can be reduced. 5. POST-CONSTRUCTION RADIO FF:EQUENCY ENERGY EXPOSURE TESTING Prior to the commercial operation o F this facility, the applicant shall submit a field test report on the radio frequency energy �missions to the Director of Community Development confirming that public exposures to generated radio frequency energy (measured at full power) complies with federal safety standards at ground level and nearest residential property line (measured at second floc�r level). 6. DISCLOSURE OF PRESENCE OF F'ERSONAL WIRELESS SERVICE FACILITY Upon construction of the project, the properiy owner shall disclose the presence of personal wireless service facility to users and expected users of the school operations and provide a copy of such notice to the Director of Community Development. Please review conditions carefully. If ya u have any questions regarding the conditions of approval, please contact the Department of Community Development at 408-777-3308 for clarification. Failure to incorporate conditions into your plaa set will result in delays at the plan checking stage. If development con��itions require tree preservations, do not clear the site until required tree protection devices �.re installed. The conditions of project approval set :°orth 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 statement of the amount of such fees, and a description of the dedic,�tions, reservations, and other exactions. You are hereby further notified that the 90-day a� proval period in which you may protest these fees, dedications, and other exactions, pursuan�: to Government Code Section 66020(a), has begun. If you fail to file a protest within this 90-d �y period complying with all of the requirements of Section 66020, you will be legally barred f�•om later challenging such exactions. Any interested person, including the app iicant, prior to seeking judicial review of tlze city council's decision in tlzis matter, must ftrst file a petition for reconsideratio�z wit/t tlze city clerk witlzin ten days after the council's decisio�c. Any petition so filed must comply witlz municipal ordinance code �2.08.096. , 2 DIR-2010-OS August 5, 2010 Sincerely: � �� Grace Schmidt Deputy City Clerk cc: Community Development Clearwire Attn. Bradley Head 2000 Crow Canyon Pl. #400 San Ramon, CA 94583 West Valley Presbyterian Church 6191 Bollinger Road Cupertino, CA 95014 Norman & Ione Yuen 6352 Myrtlewood Dr Cupertino, CA 95014 3 .. . . , , . _, . x._ ti .� ... � .► - � .. G �� -. . �ar `� �rc — ,�°G� . - �, ��a�'"�'��+�'� ��►��.. _ �.. � �: d�..�..� �__�:.��.�.i� � a ' � � � i ,.. y g .�i 'a�.�. b . C.. . l..r""`^ ' a, .,v., i� . r'�r��- �; �'�� !�� i� a C�+t �. G% ` � t �V , 4 � .�" �� 'V r� � w � ' � `��, � �� . �:5� �� .1� . ti� �w � � �_ .. � 5 � y' •� � ( a` �� '�. . � :"r'. : ei � �� , � , .� � � �,� r r ' +,:. s':'_ � - `;�y ""�.,`�,,�,�' _ � r�� "�i �. . � • r;��• �� } . ^ �I ;` F ..��• y 'Y 't •~ � { ~� .. . ..;�, . . -� .... • Y��.f !� • f .1 � er- �' j � I E R .l' � ♦`:� -a`�' :� t ' si t. �. 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' � k, . . _ :�. � {� � I .� '��. � . � ' ; �i' .r P( �'^�ti� � - . - �i+. ' y �+� � C"�." w t�. � �� I� � ' �Y� f9 d . x .� � � ',� "' f: . .,»3��1 $�� Y i_ a� •''� �,�i r 5 7 ,` t� a , � �' . {t y �� y . . ' �,' _ s [ t`. � f..l..' �.� `'.� � � � �.�,� � i' Y`w l F .` -iC+E'" i,j - '. .i''^ �} fi'rN: �, � e ''� � ; i ' 'w. , _� _ �: t tk' 1. .. , i �'. <+.Z�.?� f�1 ;n �w}w�� ,... �_.,�cr� . , d ., _ ..�r ,.:s(fet� . .�'.� � .. �+ i - ' � y „t'"� ,�.��i:�s � . . . . . � .. � :.. . a , . � �. �: , � . .,,,._. . . . _��,�^ - . .. � ,� .>+rrrJ� � .... : �: -� _ » i-.. � �!�'°° i ,�y?�a� +'Cil�� ....w..+...-. . ......�,.. _'. J.-- . .� " .w � .� I ^' r .., _ Q '. � �.�yq � .. _,. � t . . . . . � .t... .t� �.�, . F ., �^_:qy��'.e �.5., � � ...... , . � . ��w�v� ... ' ,}'.'' .* . � . - ,�.tvM�--'"__._ . . !S` _ '. : _�. �._ , _ a. . wn sv_.. ---...>.»_....___. � . �� . . _.'�_�---�.«.,-.s.,,...,.,��. .. .. . .. . . ^»+.�.,.....�,....,,�,.--.... . . _.�-.- :, .� sR*ee1��'°"x,c.�.._. .. .. � ..... . . . . . � ,..� � �_ .r-.. � � � � � f M ..:�:::, �.:::.:.�u.�:.. _ ...�..t_._..`. ` �SM e!��' "�.iYililYil�""� _ ..._. ».... _ ,��`-,.-:---"" .._. _ ..,. ...r..�. .. clear We st Vall Presby Church Site # CA-SJC014 Looking Northw from Boliinger Road 6191 Bollinger Road 5/20/10 Cupertino CA 95014 Applied Imagination 510 914-0500 � LL 61� �vo. ��If� Clearwire, LLC • Proposed BasE� Station (Site No. CA-SJC0140B) 6191 Bollinger Road � Cupertino, California Statement of Hammett & Edison, Inc., Consulting Engineers The firm of Hammett & Edison, Inc., Consulting Engineers, has been retained on behalf of C(earwire, LLC, a personal wireless service provider, to e��aluate the base station (Site No. CA-SJC0140B) proposed to be located at 6191 Bollinger Road in Cupertino, California, for compliance with appropriate guidelines limiting human exposure to radio frequency ("RF") electromagnetic fields. Prevailing Exp��sure Standards The U.S. Congress requires that the Federal C�mmunications Commission ("FCC") evaluate its actions for possible significant impact on the em�ironment. In Docket 93-62, effective October 15, 1997, the FCC adopted the human exposure limit:, for field strength and power density recommended in Report No. 86, "Biological Effects and Expc sure Criteria for Radiofrequency Electromagnetic Fields," published in 1986 by the Congressionally chartered National Council on Radiation Protection and Measurements ("NCRP"). Separate limits ap��ly for occupational and public exposure conditions, with the latter limits generally five times more resirictive. The more recent standard, developed by the institute of Electrical and Electronics Engineers and approved as American National Standard ANSI/IEEE C95.1-2006, "Safety Levels with F:espect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," inc ludes similar exposure limits. A summary of the FCC's exposure limits is shown in Figure 1. Tt�ese limits apply for continuous exposures and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health. The most restrictive FCC limit for exposures oi' unlimited duration to radio frequency energy for several personal wireless services are as follows: Personal Wireless Service Approx. Frequency Occu�ational Limit Public Limit Broadband Radio ("BRS") 2,600 MHz 5.00 mW/cm 1.00 mW/cm Advanced Wireless ("AWS") 2,100 5.00 1.00 Personal Communication ("PCS") 1,950 5.00 1.00 Cellular Telephone 870 2.90 0.58 Specialized Mobile Radio ("SMR") 855 2.85 0.57 �� Long Term Evolution ("LTE") 700 � - �:3'��'°"'" - `�"" - �"�"'�'��'� -- [most restrictive frequency range] 30-300 � 1.00 0.20 0 S General Facility Requi Base stations typically consist of two distinct part:,: the elE "channels") that are connected to the traditional �vired tel send the wireless signals created by the radios ou: to be r� transceivers are often located at ground level and are cc ,� HAMMETT & EDISON, INC. � CONSUL'PING ENGINEERS SAN FRANCISCO A��a2t� �'raP. ,.�L,��'.,�a1.0 .:�� R¢; N»e�k:a ic tra��s�(��'ca�I�e r $. vs �or �e lir�, passi am�rn�f� that d by individual subscriber unFCs". The to tl�e antenn�s� co ial cables S4�;��u�e -�-�,�--_: � PIR azo�� '��T� �S r A � PPRU �'i�a��? �-� �I'd�� ,�;:i,�;v13f �� _ • ��1 �;C7��te�l T EV. L?IR. 1 of 4 Clearwire, LLC • Proposed BasE� Station (Site No. CA-SJC0140B) 6191 Boliinger Road � Cupertino, California about 1 inch thick. Because of the short wa�el�:ngth of the frequencies assigned by the FCC for wireless services, the antennas require line-of-sight paths for their signals to propagate well and so are installed at some height above ground. The antennas are designed to concentrate their energy toward the horizon, with very little energy wasted toward the sky or the ground. Along with the low power of such facilities, this means that it is generally not possible for exposure conditions to approach the maximum permissible exposure limits without being physically very near the antennas. Computer Mc�deling Method The FCC provides direction for determining com�►liance in its Office of Engineering and Technology Bulletin No. 65, "Evaluating Compliance with �'CC-Specified Guidelines for Human Exposure to Radio Frequency Radiation," dated August 1997. Figure 2 attached describes the calculation methodologies, reflecting the facts that a directior�al antenna's radiation pattern is not fully formed at locations very close by (the "near-field" effect) a�id that at greater distances the power level from an energy source decreases with the square of the distance from it (the "inverse square law"). The conservative nature of this method for evaluating exposure conditions has been verified by numerous field tests. Site and Facii ity Description Based upon information provided by Clearwire, i ncluding drawings by Connell Design Group, LLC, dated July 28, 2009, it is proposed to mount thre�, Kathrein Model 840-10054 directional panel BRS antennas within a view screen enclosure to be c;onstructed on the highly peaked roof of the West Valley Presbyterian Church, located at 6191 Bollinger Road in Cupertino. The antennas would be mounted with 2° downtilt at an effective height o F about 59 feet above ground and would be oriented at about 120° spacing, to provide service in all di -ections. The maximum effective radiated_power in __� any direction would be 1,260 watts. Also prop�sed to be ounted within the enclosure are three � microwave "dish" antennas, for interconnection of this site ith oth�xs=� i� <t�e �� n�Qle�Qw�. i j There are reported no other wireless telecommunir,ations base Study Results For a person anywhere at ground near the site, t�e maximum proposed Clearwire operation, including the cont� ibutions of th be 0.0027 mW/cm which is 0.27% of the applicable public li the second-floor elevation of any nearby building' is 0.14% of t noted that these results include several "worst-case" assum ` Located at least 90 feet away, based on aerial photograpr s from Google Maps. , HAMMETT & EDISON, INC. � CONSULTING ENGINEEKS SAN FRANCISCO P � �., r�� 1Ci� � � +� r�d '��. .� ��6�40��,�`'•� `.�` ` . : w .�....�.,.''�� ,r.. �' �' ��I � � � �:�� p�,� �. � Y - �V. l� I � . /> CW0140B596.1 Page 2 of 4 ions installed nearby. ^ ,...:... ?..-��7-�D ��i7a33�P:'ci�t" t'..d."�`?eJ� .,� .. . �--__—_-- ....__ �.. : Cl�,� C�a:��r�� '� �_� nbient RF exposure level duei't�o the microwave antennas, 's calc lated to �i ��+uc� . it. The r�axim �� e, � ve at ; applicable public limit. It should be ore are expected to Clearwire, LLC � Proposed Bas�: Station (Site No. CA-SJC0140B) 6191 Bollinger Road • Cupertino, California overstate actual power density levels. Levels ma�r exceed the public limit on the roof of the building in front of the enclosure, very near the antennas. Recommended Niitigation Measures Due to their mounting locations, the Clearwire ani ennas would not be accessible to the general public, and so no mitigation measures are necessary to comply with the FCC public exposure guidelines. To prevent occupational exposures in excess of th� FCC guidelines, no access within 2 feet directly in front of the antennas themselves, such as might ��ccur during maintenance work on the enclosure or the top of the roof, should be allowed while the b��se station is in operation, unless other measures can be demonstrated to ensure that occupational protection requirements are met. Posting explanatory warning signsfi on the screens in front of the aniennas, such that the signs would be readily visible from any angle of approach to persons who might need to work within that distance, would be sufficient to meet FCC-adopted guidelines. Conc:lusion Based on the information and analysis above, it is the undersigned's professional opinion that the base station proposed by Clearwire, LLC at 6191 Bolli�iger Road in Cupertino, California, will comply with the prevailing standards for limiting public exposi�re to radio frequency energy and, therefore, will not for this reason cause a significant impact on the euvironment. The highest calculated level in publicly accessible areas is much less than the prevailing :;tandards allow for exposures of unlimited duration. This finding is consistent with measurements of actual exposure conditions taken at other operating base stations. Posting of explanatory signs is recommended to establish compliance with occupational exposure limitations. _— ._ _ _.�_ _. _ � . ., . _ - _.Q J �Q-�o� o,-_d5 ��f��: .. `'--., . , ;� _�.'�?7-1n � .1. y' w . ,..,. ...r i d __.-.......,•—,�.- C_...--�� .c� � � t ��' i�:,P�e'3+ �` • $ �+' i(:t)�t i` �:it11 ' €° t Warning signs should comply with OET-65 color, syrrbol, and content recommendations. Contact information should be provided (e.g., a telephone number) to arrange for access to restricted areas. The selection of language(s) is not an engineering matter, and guidance from the landlord, local zoning or health authority, or appropriate professionals may be required. HAMMETT & EDISON, INC. b CONSULTING ENGINEERS SAN FRANCISCO �_( �c' a.o r U -v� �`�,::: �:;;:F:i`�, r,,^�'�3�'��`i��,�:, CW0140B596.1 � � 5- o, 7—� � Page 3 of 4 a..r � u, ': . F":�F f l 3.v. , ` ..�Q1 �.� .'..� ��.%�. �;" �.; � . �° .. b� 1�. � � � .. �J Clearwire, LLC • Proposed Bas�: Station (Site No. CA-SJC0140B) 6191 Bollinger Road • Cupertino, California Authorship The undersigned author of this statement is a<�ualified Professional Engineer, holding California Registration Nos. E-13026 and M-20676, which expire on June 30, 2011. This work has been carried out under his direction, and all statements are triie and correct of his own knowledge except, where noted, when data has been supplied by others, whi:,h data he believes to be correct. December 22, 2009 !, ,��-0'.1; , r �'. . . ..�?1�-�.�.�.Lo..r.,0 5 �`'� Y ��G : � .. . ''� __./ ��_�� s.�i � t + _: ��'?,'r.; t r. e,/ ^ V — /V '✓ _._... ,..�..- �.. _ ....._�......_ C: ��...-- "�: , d�'aar � 4ur,�_s - HAMMETT & EDISON, INC. ti CONSULTING ENCINEEIZS SAN ERANCISCO �I+�''�vIQ �5 €".`a' i �;�`� ��':� :�°�'�� ___��.�"�7—/fl F ... . � .�° �..�(�.. ", � �� . ��' J"�'k CW0140B596.1 Page 4 of 4 FCC Radio Frequer�cy Protection Guide The U.S. Congress required (1996 Telecom Act) the Federal Communications Commission ("FCC") to adopt a nationwide human exposure standard to ensure that its licensees do not, cumulatively, have a significant impact on the environment. The FCC adopted the limits from Report No. 86, "Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields," published in 1986 by the Congressionally chartered National Council on F_adiation Protection and Measurements ("NCRP"). Separate limits apply for occupational and public exposure conditions, with the latter limits generally five times more restrictive. The more recent standard, developed by the Institute of Electrical and Electronics Engineers and approved as American l�iational Standard ANSUIEEE C95.1-2006, "Safety Levels with Respect to Human Exposure to R�.dio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," includes similar limits. These limits a�ply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health. As shown in the table and chart below, separate limits apply for occupational and public exposure conditions, with the latter limits (in italics andlor cashed) up to five times more restrictive: Frequency Applicable Range (MHz) Electroma n�etic l�ields (f is frec�uency of emission in MHz) Electric Field Strength (V/m) 614 614 614 823.8/f 1842/ f 823.8/f 61.4 27.5 3.54�f 1.59ff 137 61.4 Magnetic Equivalent Far-Field Field Strength Power Density (A/m) (mW/cm 03 — 1.34 1.34 — 3.0 3.0 — 30 30 — 300 300 — 1,500 1,500— 100,000 p (�I'Q o�0� 100 r�� ?��' � � 10 � �,... �;.�:, . � 9 ;. a�� \ '/0 1 �yi'f�$ls,;'f! �Erd'liyo-e.r.'s.,•rCS ,,,�-'`,�.!—__._ 6ie.:v 7 �' � �. 1 f. � �y' �C-� �,y �'. �: �_..,,,�„� —�--�---.....�-� . i�+te _�.1° "" - 0.1 �:.i�^a:1SP:' (` •e Al,�u �Lr 1.63 1.63 1.63 2.19/f 4.89/ f 2.19/f 0.163 0.0729 �f/106 �f/238 0.364 0.163 100 100 100 180/f 900/ f 180/� 1.0 0.2 f/300 f/1 S00 5.0 1.0 �/ Occupational Exposure PCS � Cell � FM `` ' �� `� � cblic Exposure 10 100 10 10 10 Frequency (MHz) Higher levels are allowed for s�rt periods of timf:, such that total exposure levels averaged over six or t' , i�ia or public setting�, respectively, do not exceed the limits, and higher levels also are allowed for exposures to small areas, such that the spatially averaged levels do not exceed the limits. However, neither of these allov�ances is incorporated in the conservative calculation formulas in the FCC Office of Engineering and Technology Bulletin No. 65 (August 1997) for projecting field levels. Hammett & Edison has >>uilt those formulas into a proprietary program that calculates, at each location on an arbitrary rectan�;ular grid, the total expected power density from any number of individual radio sources. The prograrl allows for the description of buildings and uneven terrain, if required to obtain more accurate projections. , HAMMETT & EDISON, ING � �� 'O�� coNSUr.�ruvcENC�Exs 4 ^�"'�� ' <��-�°,;=� �'��;��, FCCGuidelines SAN FRANCISCO 3' i `. � v �j �? m �� Figure 1 �' V ` .d�� 1 � �t . � "._ r _ . � , ��,��: ,., �'''..'b`'�7ti' ,_wr. ��. IV'R.C/�1L.C Calc�ilation Methodology Assessment by Calculation of ComE�liance with FCC Exposure Guidelines The U.S. Congress required (1996 Telecom Act) tre Federal Communications Commission ("FCC") to adopt a nationwide human exposure standard to ensure that its licensees do not, cumulatively, have a significant impact on the environment. The maxinium permissible exposure limits adopted by the FCC (see Figure 1) apply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of age, ;;ender, size, or health. Higher levels are allowed for short periods of time, such that total exposur�� levels averaged over six or thirty minutes, for occupational or public settings, respectively, do nc t exceed the limits. Near Field. Prediction methods have been developed for tr e near field zone of panel (directional) and whip (omnidirectional) antennas, typical at wireless telecommunications base stations, as well as dish (aperture) antennas, typically used for microwave links. The antenna patterns are not fully formed in the near field at these antennas, and the FCC Office of Engineering and Technology Bulletin No. 65 (August 1997) gives suitable formulas for calculating power density within such zones. For a panel or whip antenna, power density S= 180 x 0.1 x P1e� � in mW��2� 9 ,�'xD xh �.IX16X'1�XP and for an aperture antenna, maximum power den,�ity s� = 2 , in mw/cm __ __ . . �_., �- , �_,_._.. , where egW = half-power beamwidth of tlie antenna, in de�rees, an�, ��;� ;_, p11Q-a01.D..'05 Pnet = net power input to the antf�nna, in watts, ! - }° ° _ D= distance from antenna, in nieters, h= aperture height of the anteruia, in meters, a d P � �°�7- l� ��:,�: V r� = aperture efficiency (unitle� s, typically 0.5- .8). C ,�� 3 � �.�«�� 8-3.-�1�j The factor of 0.1 in the numerators converts to th�; desired units o power density. "'"` Far Field. OET-65 gives this formula for calculating power density in the far 2.56xL6��x100xRFF power density S = 4x�txD Sig�oalure C� �,.--- of an mdividual R�p,�c�� ERP where ERP = total ERP (all polarizations), i�i kilowatts, RFF = relative field factor at the direction to the actual point of calculation, and D= distance from the center of radiation to the point of calculation, in meters. The factor of 2.56 accounts for the increase in ��ower density due to ground reflection, assuming a reflection coefficient of 1.6 (1.6 x 1.6 = 2.56). 'I'he factor of 1.64 is the gain of a half-wave dipole relative to an isotropic radiator. The factor of 1(�0 in the numerator converts to the desired units of power density. This formula has been built into a proprietary program that calculates, at each location on an arbitrary rectangular grid, the total expec:ed power density from any number of individual radiation sources. The program also allows for :he description of uneven terrain in the vicinity, to obtain more accurate projections. , HAMMETT & EDISON, INC. � CONSULTING ENGINEERS SAN FRANCISCO DI�-�� t0 -�a� ��"��:�"' �°{ ""�` � ��5'�'��L� � .,.� . �'s �-� �.F s;'�/ • _...._5.:�?�,-10 � e. ��.: 3 w;.+ i d �9 ,��„1 f', ,� � . � r.: !'� l"1� !t�f (..� �� i • 19. � � � . Methodology Figure 2 Colin Jung Subject: FW: Two Clearwire Cell Site Referr� Is: DIR-2010-05; U-2010-01 Email 2 -----Original Message----- From: Peter Friedland [mailto:peterfriedland@gmail.com] Sent: Wednesday, February 17, 2010 12:25 AM To: Colin Jung; Avinash Gadre Subject: RE: Two Clearwire Cell Site Referrals: D[R-2010-05; U-2010-01 Email 2 Dear Colin, My comments on the two proposed Clearwire applications are as follows: 1. DIR-2010-15: the analysis of maximum possibl= radiation exposure appears technically correct and well-supported. The installation pro✓ides good coverage for the wimax frequencies. Esthetically the design seems nearl�r completely invisible to the casual observer, although as noted by staff, the term "capola" to describe the enclosure is incorrect. 2. U-2010-01: the analysis of maximum possible radiation exposure appears technically correct and well-supported. The installation pro�ides good coverage for the wimax frequences. While the installation does substantially change the look of the New Life Church, it provides no indication that it is an electronic installation, and i find it a clever way to blend into the existing church architecture. Peter Friedland Vice-Chair, TICC . ; w�� ,:.��. � .�. Ql�r.�ot_fl^,_o_5 { . .... ._, t ��an:, �:;,�;:.: . . : :L -? -a�-to € ;g� ?,... � ,�t5:,� !�yt.�:.rii�� W r ��...._e.....— � i�. d' — — l:s:c �$�1('ia`3iL��1M."". , . f:u:c F tu�cr (� (� �0��05 ` ` . ~� a °t � �� " �' � ��,�'i �, 'a o,.^ � a . _.. _.. _ ,�.. �,,Q:Z -/ 0 �. . . .' ° f :. . � ' _. Ji,{� � •t lS,.It_ 1 i'ir � x . � ; �:;. �°��" �.a � �x f � � . � � �. Colin Jung Subject: FW: Two Clearwire Cell Site Referr� Is: DIR-2010-05; U-2010-01 From: Avinash Gadre [mailto:avigadre@hotmail.com] Sent: Tuesday, February 16, 2010 11:52 AM To: Colin )ung; Peter Friedland Subject: Re: Two Clearwire Cell Site Referrals: DIR-2010-05; U-2010-01 Hi Colin My comments - D I R-2010-05: 1. There are no technical concerns - antenna would provicle adequate coverage. 2. Based on calculations provided by Clearwire, there are no concerns of public exposure 3. Even though proposed design is acceptable aesthetically, it is not cupola as described by the contractor. u-zaso-os: 1. There are no technical concerns - antenna would provicle adequate coverage. 2. Based on calculations provided by Clearwire, there are no concerns of public exposure 3. Aesthetically, the design goes well with rest of the builcling. Even though size of the modified rooftop is bigger compared the rest of the building, number of anter nas are same as in proposal C�13�-�t�l£�-�5 (above). Regards .� ,_.. D��-a��o-_05 , r _ . ._ .___ ._� a Avinash 1 �� . . . .. . . ... rr 7_ I r /V y.�i V :i� i� ,. l''o :. J �.�, t.�.�.,... �. �.^.....�. ! O �_._.... _. r k�. ,: � R k ♦. \ � �-31£C I071U6i °L'�'� � � I� �.�� 10 - 5` �s � _�< :� ;�;�,,..'°;�, .� . . ._ .. �._ �� .. �� / ,� s .,';:. :�.',i�;., r-�'.., .... ...�n �; t� 14'� r�� # i�! � V. D# F�. U Di� .�oro --0,5 a�� : _ � x;�� =-��`��.. � �'+� ' i.;'�� %� � . : . `,"'r� p `;,,�,� ,�f t a > ( ./ , CJ � �! . � . .. �,- , — � O i �. , ,.w. .. 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Chapter 19.132 of the Cupertino Municipal Code allows for administrative approval of minor changes in a project The Director reports his decision to the City Council, Planning Commission a�ld property owners within 1,000 feet to afford interested parties time to appe;�l the decision within fourteen calendar days. BACKGROUND: The applicant, Bradley Head, of NSA Wireless, representing Clearwire, is proposing to install a personal wireless service facility on the rooftop of the West Valley Presbyterian Church at 6191 Bollinger Road. The personal wireless service f�icility consists of three panel antennas and three rooftop microwave dishes mounted on the roof, and an equipment cabinet located in an enclosure at ground level. Clearwire is a subsiciiary of Sprint/Nextel, that will provide Sprint's 4G (4� generation) technology. DISCUSSION: Screening Visible rooftop equipment must be screened f:�om public street view. The equipment has been enclosed in a faux cupola constructed of radic transparent materials that do not interfere with the radio signals (Attachment A). The faux cupola has been designed to complement the design of the church, matching the roof materi��ls and the brick columns at grade, enhancing the appearance of the church. Radio Frequency Energy (RFE) Assessmerit An RFE assessment was commissioned by the <<pplicant to evaluate the RFE exposure from the personal wireless service facility against national safety standards . The study concluded that the potential exposure from RFE, at ground level and from the second floor elevation of any DIR-2010-05 6191 Bollinger Road Page 2 nearby building, are well below federal safety standards (respectively, 0.27% and 0.14% of the applicable public limit - see Attachment B). Technology, Information and Communicatior.s Commission (TICC) Review The Cupertino Technology, Information and Communications Commission (TICC) reviewed the proposal and commented that the propc sed facility will provide adequate coverage to nearby residents, workers and businesses. TI; C did not have any concerns about the visual effects or RFE of the antennas (Attachment C). ACTION: The Director of Community Development deerls the modification minor and approves the wireless facility with the following conditions c�f approval. State law requires a minimum 10- year permit for personal wireless service facilities. 1. APPROVED EXHIBITS Approval is based on Exhibits titled: "CA-S�C0140B/6191 Bollinger Road/Cupertino, CA 95014" prepared by CDG: Connell Design C�roup, LLC dated 03/04/10 and consisting of four sheets labeled T1, A1, A2, and A3, excE pt as may be amended by the conditions contained in this resolution. 2. NOTICE OF FEES, DEDICATIONS, RESER VATIONS OR OTHER EXACTIONS The Condidons of Project Approval set fc�rth herein may include certain fees, dedication requirements, reservation requirements, � nd other exactions. Pursuant to Government Code Section 66020(d) (1), these Conditior s constitute written notice of a statement of the amount of such fees, and a description of dte dedications, reservations, and other exactions. You are hereby further notified that the 9C-day approval period in which you may protest these fees, dedications, reservations, and �ther exactions, pursuant to Government Code Section 66020(a), has begun. If you fail to f �le 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. 3. ABANDONMENT If after installation, the aerial is not used fc�r its permitted purpose for a continuous period of 18 months, said antennae and associatecl facilities shall be removed. The applicant shall bear the entire cost of demolition and remo ✓al. 4. EXPIRATION DATE This Director's Minor Modification shall e;:pire ten (10) years after the effective date of the permit. The applicant may apply for a ren��wal of the minor modification at which time the Director of Community Development may review the state of wireless communication and camouflage technologies to determine if t�ie visual impact of the personal wireless facility can be reduced. 6. POST-CONSTRUCTION RADIO FREQUEl� ENERGY EXPOSURE TESTING Prior to the commercial operation of this facility, the applicant shall submit a field test report on the radio frequency energy emis� ions to the Director of Community Development confirming that public exposures to gene rated radio frequency energy (measured at full DIR-2010-05 6191 Bollinger Road Page 3 power) complies with federal safety star dards at ground level and nearest residential property line (measured at second floor lev��l). 7. DISCLOSURE OF�PRESENCE OF PERSON.�L WIRELESS SERVICE FACILITY Upon construction of the project, the property owner shall disclose the presence of personal wireless service facility to users and expected users of the school operations and provide a copy of such notice to the Directo r of Community Development. This Director's approval is effecdve May 27, 20"'.0. The fourteen calendar day appeal period will expire on June 10, 2010. Enclosures: Attachment A: Photosimulation Attachment B: Statement of Hammett & Edison, Inc., Consulting Engineers, on compliance with FCC standards for RFE e�:posure for the Clearwire, LLC Proposed Base Station (Site No. CA-SJC0140B i, 6191 Bollinger Road, Cupertino, California". Attachment C: Emails from TICC Commission��rs Attachment D: Plan Set ------- -- �.-----•�--�--�---._------.�. �OT('i ' Attachments are available in the Planning Dep��rtrnent file and may be viewed at the City's website at www.cupertino.or�. 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'..' + .� �;,•�- . � � ._. -.... #� �. � - . +� n �� !; �`r ; .t ��. ; � � ` � . � � 1 � r � - � ,i �°•�� .. ..��. . .. _ _ . ; . . �� . ;. _„ � ' •.. <<. , � . . � �. . �+�rec��, - „ . ... . a:�S: . , . . > _. .. . �..-..t� . ___,,. _ - .. � w L i.� L •. wl� � ' �� yje� � - Zri �. _ . , �/ .... .�- „ �...y....-.. . .. .__. . , . . . -N' , .. .. . �.__ .__. ._ - / . �°' ��,/'�,�,� � �' .'"w�vS-�., • �..,�i. . .,�...�,u.. .,�.--.-- y � ��.. . . ..._ � .. _ - ��_.!�'. ;,"T .._i,�, �, . . � � .. y . ....-. ar� a. �...,��...i ^�-�.....,....__..__......r.,n..�a-...� �. . . °.�^+...._'TM►�...-w _ . -.. . _ ... - r . � , �,,,.+ay . °".._"„""""-' _ _ � ��„ _ . � • �` - e .��,� -�;�,�-�=-- _ �-.�. _. � . , �_ _�»�,�"_ _..- = - _.,.--�--'" clear West Valiey Presbyterian Church Site # CA-SJC0140 Looking Nor from Bolling Road 6191 Bollinger Road 5/20/10 Cupertino CA 95014 Applied Imagination 51 0 91 4-0500 ATTACHMENT B Clearwire, LLC • Proposed E�ase Station (Site No. CA-SJC0140B) 6191 Bollinger Rc ad • Cupertino, California Statement of Hammett 8� E:dison, Inc., Consulting Engineers The firm of Hammett & Edison, Inc., Consulting Engineers, has been retained on behalf of Clearwire, LLC, a personal wireless service provider, to evaluate the base station (Site No. CA-SJC0140B) proposed to be located at 6191 Bollinger Road in Cupertino, California, for compliance with appropriate guidelines limiting human exposure to radio frequency ("RF") electromagnetic fields. Prevailing E:xposure Standards The U.S. Congress requires that the Feder�.l Communications Commission ("FCC") evaluate its actions for possible significant impact on the environment. In Docket 93-62, effective October 15, 1997, the FCC adopted the human exposure limits for field strength and power density recommended in Report No. 86, `Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields," published in 1986 by the Congressionally chartered National Council on Radiation Protection and Measurements ("NCRP"). Separate limit:; apply for occupational and public exposure conditions, with the latter limits generally five times more restrictive. The more recent standard, developed by the Institute of Electrical and Electronics Engineers and approved as American National Standard ANSIlIEEE C95.1-2006, "Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," includes similar exposure limits. A summary of the FCC's exposure limits is shown in Figure 1. These limits apply for continuous exposures and are intended to provide a prudent margin of saf�ty for all persons, regardless of age, gender, size, or health. The most restrictive FCC limit for exposures of unlimited duration to radio frequency energy for several personal wireless services are as follov�s: Personal Wireless Service Antrox Frequenc� Occupational Limit Public Limit Broadband Radio ("BRS") 2 600 MHz 5.00 mW/cm 1.00 mW/cm Advanced Wireless ("AWS") 2,100 5.00 1.00 Personal Communication ("PCS") 1,950 5.00 1.00 Cellular Telephone 870 2.90 0.58 Specialized Mobile Radio ("SMR") 855 2.85 0.57 Long Term Evolution ("LTE") 700 2.33 0.47 [most restrictive frequency range] 30-300 1.00 0.20 General Facility Requirements Base stations typically consist of two distinct parts: the electronic transceivers (also called "radios" or "channels") that are connected to the traditio�ial wired telephone lines, and the passive antennas that send the wireless signals created by the radio � out to be received by individual subscriber units. The transceivers are often located at ground leve 1 and are connected to the antennas by coaxial cables ,� HAMMETT & EDISON, INC. P � JP -- Z0/C� "05 b CONSULTINGENGINEERS ��'�'�� pp��L CW0140B596.1 snrr Fanivc►sco Page 1 of 4 a ��a��. �L"_�7��0 f i � _ ��ia��iJji ��: ' ..�11 t; C?� �� f� t. T E V. t� I'� . 0 � r�� t'1HMMC1 1 OL �L1JV1V� ti��.. V FT�--��yCD /('9�•-/'15 r�irni nnnco� � FCC Radio Frequency Protection Guide The U.S. Congress required (1996 Telecom A.ct) the Federal Communications Commission ("FCC") to adopt a nationwide human exposure standaid to ensure that its licensees do not, cumulatively, have a significant impact on the environment. The ��CC adopted the limits from Report No. 86, `Biological Effects and Exposwe Criteria for Radiofreque:ncy Electromagnetic Fields," published in 1986 by the Congressionally chartered National Council c�n Radiation Protection and Measurements ("NCRP"). Separate limits apply for occupational and pul>lic exposure conditions, with the latter limits generally five times more restrictive. The more recent standard, developed by the Institute of Electrical and Electronics Engineers and approved as Ameri�;an National Standard ANSUIEEE C95.1-2006, "Safety Levels with Respect to Human Exposure tc� Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," includes similar limits. These limits apply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health. As shown in the table and chart below, sepa °ate limits apply for occupational and public exposure conditions, with the latter limits (in italics and�or dashed) up to five times more restrictive: Frequency Electroma�netic Fields (f is frequency of emission in MHzL Applicable Electric Magnetic Equivalent Far-Field Range Field Strength Field Strength Power Density (MHz) (V/m) (A/m) (mW/cm 0.3 — 1.34 614 614 1.63 1.63 100 100 1.34 — 3.0 614 823.8�'f 1.63 2.19/f 100 180/f 3.0 — 30 1842/ f 823.8�'f 4.89/ f 2.19/f 900/ f 180/� 30 — 300 61.4 27. S 0.163 0.0729 1.0 0.2 300— 1,500 3.54'ff 1.59�f �f/106 �f/238 f/300 f/I500 1,500 — 100,000 137 61.4 0.364 0.163 5.0 1.0 1000 / Occupational Exposure 100 d PCS N � Cell � �' � o � 3 10 �� FM a Q � 1 ,, � �� `� f � � — 0.1 / Public ExposurE 0.1 1 1(� 100 10 10 10 t'requency (MHz) Higher levels are allowed for short periods of :ime, such that tota.l exposure levels averaged over six or thirty minutes, for occupational or public ser:ings, respectively, do not exceed the limits, and higher levels also are allowed for exposures to sma 11 areas, such that the spatially averaged levels do not exceed the limits. However, neither of these allowances is incorporated in the conservative calculation formulas in the FCC Office of Engineerin�; and Technology Bulletin No. 65 (August 1997) for projecting field levels. Hammett & Edison Y�as built those formulas into a proprietary program that calculates, at each location on an arbitrary rectangular grid, the total expected power density from any number of individual radio sources. The pro;;ram allows for the description of buildings and uneven terrain, if required to obtain more accwate projections. , HAMMETT & EDISON, ING � �� °�'� �"�� FCC Guidelines � CONSULTING ENGINEERS � � � � :� � � fi e �� ;� � � � � �� . SAN FRANCISCO y r *' �, . rj —�'� �� Figure 1 ♦ � . l. •. ' ,i ! I .J .Gi.. .... �.�r. _� � �� ?.f 1 , 1� ~ i' Sf. .��'�, Clearwire, LLC • Proposed E�ase Station (Site No. CA-SJC0140B) 6191 Bollinger Raad • Cupertino, California overstate actual power density levels. Levels may exceed the public limit on the roof of the building in front of the enclosure, very near the antennas. Recommende� Mitigation Measures Due to their mounting locations, the Clearwire antennas would not be accessible to the general public, and so no mitigation measures are necessary to comply with the FCC public exposure guidelines. To prevent occupational exposures in excess of the FCC guidelines, no access within 2 feet directly in ftont of the antennas themselves, such as mi€;ht occur during maintenance work on the enclosure or the top of the roof, should be allowed while the base station is in operation, unless other measures can be demonstrated to ensure that occupational protection requirements are met. Posting explanatory warning signsfi on the screens in front of the antennas, such that the signs would be readily visible from any angle of approach to persons whc► might need to work within that distance, would be sufficient to meet FCC-adopted guidelines. Conclusion Based on the information and analysis above, it is the undersigned's professional opinion that the base station proposed by Clearwire, LLC at 6191 B�ilinger Road in Cupertino, California, will comply with the prevailing standards for limiting public ex��osure to radio freyuency energy and, therefore, will not for this reason cause a significant impact on the environment. The highest calculated level in publicly accessible areas is much less than the prevailing standards allow for exposures of unlimited duration. This finding is consistent with measurements of actual exposure conditions taken at other operating base stations. Posting of explanatory signs is recommended to establish compliance with occupational exposure limitations. t Warning signs should comply with OET-65 color, symbol, and content recommendations. Contact information should be provided (e.g., a telephone number) to arr �nge for access to restricted areas. The selection of language(s) is not an engineering matter, and guidance from the landlord, local zoning or health authority, or appropriate professionals may be required. HAMMETT & EDISON I1VC. ��C -, o? D I U�� coNSULTU�rc�NCUVEEizs � �r � ;, �_. '�, �,, .��.,��.��.., CW0140B596.1 SAN FRANCISCO �„';t':�_ ;. ,�� :i �a7�� Page 3 0 4 9 -e--� 9-e :°r :�„i s� i�3 i�.,� i't l�,. � -� pA (�� :,.`� �?.� �:S'.,; �E ' �' _. �- V. � 1 � , , _ . : , . . . : : . ; -. : �: . � �-r.. __ �n �.�� Clearwire, LLC • Proposed Etase Station (Site No. CA-SJC0140B) 6191 Bollinger Rc�ad • Cupertino, California Authorship The undersigned author of this statement is a qualified Professional Engineer, holding California Registration Nos. E-13026 and M-20676, whi��h expire on June 30, 2011. This work has been carried out under his direction, and all statements arr, true and correct of his own knowledge except, where noted, when data has been supplied by others, which data he believes to be correct. E Q �F. S ��f �t�� ` � • - . � E-1 �6 � M-�� William F. Ham tt, P.E. December 22, 2009 �xp. s-3o-2o» _...__ "� '��'�'cfr�i��'�' 'Q' 9�� HAMMETT & EDISON, INC. i�� IC�'.�O/0 2'�5' CW0140B596.1 � CONSUL'I'ING ENCINEEIZS �`� � � �' * � � `�': :t � � ° 4 .,, w �. � :�xz�'��r��„ SAN FRANC[SW F _� 7 _�,� Page 4 of 4 � ? � � ~_�� . `o n,.� . � .. -'1� P"sy�, FCC Radio Frequency Protection Guide The U.S. Congress required (1996 Telecom �.ct) the Federal Communications Commission ("FCC") to adopt a nationwide human exposure standa� d to ensure that its licensees do not, cumulatively, have a significant impact on the environment. The :?CC adopted the limits from Report No. 86, "Biological Effects and Exposure Criteria for Radiofreque�ncy Electromagnetic Fields," published in 1986 by the Congressionally chartered National Council c�n Radiation Protection and Measurements ("NCRP"). Separate limits apply for occupational and pul�lic exposure conditions, with the latter limits generally five times more restrictive. The more recent standard, developed by the Institute of Electrical and Electronics Engineers and approved as Ameri�;an National Standard ANSUIEEE C951-2006, "Safety Levels with Respect to Human Exposure tc� Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," includes similar limits. These limits apply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health. As shown in the table and chart below, separate limits apply for occupational and public exposure conditions, with the latter limits (in italics and� or dashed) up to five times more restrictive: Frequencv Electroma$netic Fields (f is frequencXof emission in MHz) Applicable Electric Magnetic Equivalent Far-Field Range Field Strength Field Strength Power Density (MHz) (V/m) (A/m) (mW/cm 0.3 — 1.34 614 614 1.63 1.63 100 100 1.34 — 3.0 614 823.8,'f 1.63 2.19/f 100 180/f 3.0 — 30 1842/ f 823.8, f 4.89/ f 2.19/f 900/ f 180/f 30 — 300 61.4 27.5 0.163 0.0729 1.0 0.2 300— 1,500 3.54�f 1.59�!' �f/106 'ff/238 f/300 f/IS00 1,500 — 100,000 137 61.4 0.364 0.163 5.0 1.0 1000 / Occupational Exposure 100 •l PCS � •� � 10 �� FM Cell � �3 ♦ a Q � 1 .` � �� `� f � � — 0.1 / Public ExposurE 0.1 1 1(1 100 1 � 1 � 10 t'requency (MHz) Higher levels are allowed for short periods of time, such that total exposure levels averaged over six or thirty minutes, for occupational or public set:ings, respectively, do not exceed the limits, and higher levels also are allowed for exposures to sm�.11 areas, such that the spatially averaged levels do not exceed the limits. However, neither of these allowances is incorporated in the conservative calculation formulas in the FCC Office of Engineerin�; and Technology Bulletin No. 65 (August 1997) for projecting field levels. Hammett & Edison t�as built those formulas into a proprietary program that calculates, at each location on an arbitrary rectangular grid, the total expected power density from any number of individual radio sources. The pro;;ram allows for the description of buildings and uneven terrain, if required to obtain more accurate projections. , HAMMETT & EDISON, ING �(� �'� � ��r" FCC Guidelines � CONSULTING ENGINEERS � _. :� � � a ' ''� '� � :r� J`�'�! �� „ SAN FRANCISCO ±,; ,,•; . 5 � �� Figure 1 .. a.1_�� a :� . � _ _�� r, i�. Rf'R.C/"�LC C;�Iculation Methodology Assessment by Calculation of Cc�mpliance with FCC Exposure Guidelines The U.S. Congress required (1996 Telecom Act) the Federal Communications Commission ("FCC") to adopt a nationwide human exposure standard to ensure that its licensees do not, cumulatively, have a significant impact on the environment. The m.�ximum permissible exposure limits adopted by the FCC (see Figure 1) apply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of a;e, gender, size, or health. Higher levels are allowed for short periods of time, such that total expc sure levels averaged over six or thirty minutes, for occupational or public settings, respectively, d�� not exceed the limits. Near Field. Prediction methods have been developed for the near field zone of panel (directional) and whip (omnidirectional) antennas, typical at wireless telecommunications base stations, as well as dish (aperture) antennas, typically used for microw �ve links. The antenna patterns are not fully formed in the near field at these antennas, and the FCC Office of Engineering and Technology Bulletin No. 65 (August 1997) gives suitable formulas for calculating power density within such zones. For a panel or whip antenna, power density ;j = 180 x 0.1 x P net � ln m�7��2� e �xD xn O.1x16x�xP and for an aperture antenna, maximum power density S _ � x h2 , in mw��2, where 8BW = half-power beamwidth of the antenna, in degrees, and Pnet = net power input to the antenna, in watts, D= distance from antenna, in meters, h= aperture height of the antenna, in meters, and r� = aperture efficiency (unitless, typically 0.5-0.8). The factor of 0.1 in the numerators converts t�� the desired units of power density. Far Field. OET 65 gives this formula for calculating power density in the far field of an individual RF source: 2.56x1.64x100xRFF xERP power density S= , in mw/cm 4xJCxD where ERP = total ERP (all polarization;;), in kilowatts, RFF = relative field factor at the c irection to the actual point of calculation, and D= distance from the center of'radiation to the point of calculation, in meters. The factor of 2.56 accounts for the increase in power density due to ground reflection, assuming a reflection coefficient of 1.6 (1.6 x 1.6 = 2.561. The factor of 1.64 is the gain of a half-wave dipole relative to an isotropic radiator. The factor of 100 in the numerator converts to the desired units of power density. This formula has been built ir to a proprietary program that calculates, at ea.ch location on an arbitrary rectangular grid, the total expected power density from any number of individual radiation sources. The program also allows For the description of uneven terrain in the vicinity, to obtain more accurate projections. DI�i'—a� ro —o� HAMMETT & EDISON, INC. ��,��;�;�`� ;�;,.��r� �a��,�,#�•;�-�� Methodology +� coNSU[.�rIIVC ENC�Exs ��/<�`�-;°; , -�� _� � Figure 2 SAN FRANCISCO - ,,,,,, +-^ i ;� i' � , �� ;,. �..1 �`'� �. � i .� t�<�?�'ti''��I�EE��"�� '��. ��. ATTACHMENT C Colin Jung Subject: FW: Two Clearwire Cell Site Referrals: DIR-2010-05; U-2010-01 Email 2 -----Original Message----- From: Peter Friedland [mailto: peterfriedland@gmail. com] Sent: Wednesday, February 17, 2010 12:25 AM To: Colin Jung; Avinash Gadre Subject: RE: Two Clearwire Cell Site Referrals: DIR-2010-05; U-2010-01 Email 2 Dear Colin, My comments on the two proposed Clearwire applications are as follows: 1. DIR-2010-15: the analysis of maximum possible radiation exposure appears technically correct and well-supported. The installation provides good coverage for the wimax f requencies. Esthetically the design seems nEarly completely invisible to the casual observer, although as noted by staff, the terrr "cupola" to describe the enclosure is incorrect. 2. U-2010-01: the analysis of maximum possitle radiation exposure appears technically correct and well-supported. The installation provides good coverage for the wimax frequences. While the installation does substantially change the look of the New Life Church, it provides no indication that it is �n electronic installation, and i find it a clever way to blend into the existing church �rchitecture. Peter Friedland Vice-Chair, TICC (� �� v�()/Cs°p5' x� � n5 _� � Y� 0 w� ? . >•i �`�'��i�.�'i�, . . _ _.. _. ..... ,� ��.: /0 , _ . � i;. .�� _ .� ..�;< a :3�-�- ��f�?. 1 ti 'i P v f Colin Jung Subject: FW: Two Clearwire Cell Site Referrals: DIR-2010-05; U-2010-01 From: Avinash Gadre [mailto:avigadre@hotmail.com] Sent: Tuesday, February 16, 2010 11:52 AM To: Colin Jung; Peter Friedland Subject: Re: Two Clearwire Cell Site Referrals: DIR-2010-0�; U-2010-01 Hi Colin My comments - DIR-201Q-05: 1. There are no technical concerns - antenna would provide adequate coverage. 2. Based on calculations provided by Clearwire, there are no concerns of public exposure 3. Even though proposed design is acceptable aesthetically, it is not cupola as described by the contractor. U-2010-01: 1. There are no technical concerns - antenna would provide adequate coverage. 2. Based on calculations provided by Clearwire, there are no concerns of public exposure 3. Aesthetically, the design goes well with rest of the f�uilding. Even though size of the modified rooftop is bigger compared the rest of the building, number of ai�tennas are same as in proposal �l�t-�c��C�� (above). Regards Avinash �I� �05 r� .. �` s � .. ��- .�'� 7. " /O � , . 5 .; : '' , � ; "_.. . ...,.._..,�•36. J..�.G� � . �� .^�; �!;i�":�';�! V. D41�. i D 1►�-��r o -05 ��n�:t. _.`� ��'� .��'��. .—� .. . ,c •, �, ,�, i; �';''r ``•� �`-`.:�_' � �. � : ._a� ��r�x�st a„.t U �� . 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