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HomeMy WebLinkAbout3.2 ITEM 3.2 TOWN OF LOS ALTOS HILLS January 6, 2016 Staff Report to the Planning Commission SUBJECT: SITE DEVELOPMENT PERMIT AND CONDITIONAL USE PERMIT FOR MODIFICATIONS TO A PREVIOUSLY APPROVED WIRELESS COMMUNICATIONS FACILITY; LANDS OF THE TOWN OF LOS ALTOS HILLS (APPLICANT: AT&T C/O TIM PAGE); 26379 FREMONT ROAD;FILE #257-15-ZP-SD-CUP FROM: Steve Padovan, Consultant Planner S APPROVED: Suzanne Avila, AICP, Planning Director SA RECOMMENDATION: That the Planning Commission: Forward a recommendation to the City Council that the Conditional Use Permit for modifications to an existing wireless communication facility be approved, subject to the findings in Attachment 1 and conditions of approval in Attachment 2. BACKGROUND The subject property is a 1.57 acre parcel owned by the Town of Los Altos Hills located directly adjacent to the Town's Council Chambers. The property contains the following: - The Heritage House; - Several pole mounted solar panel arrays for Town Hall; - A 69-foot tall monopine (a monopole for cellular antennas with artificial branches that resemble a coniferous tree)—total height of 74 feet to top of emergency comm. antenna; - Antennas for two wireless providers (Verizon and AT&T); - Emergency communications antennas; - A 330 square foot structure owned by the Town that houses the wireless equipment; - A lean-to shelter covering historical agricultural equipment. Cingular Wireless was the original developer of the monopine which was approved by the City Council on February 16, 2006. Cingular was eventually purchased by AT&T and the monopine was acquired by Crown Castle. On January 14, 2010, the City Council approved the co-location of a second provider, Verizon Wireless. The monopine is designed to resemble a conifer tree with the central support pole resembling a tree trunk with bark and artificial limbs extending from the pole covered with plastic needles. The antennas are disguised within the branches, painted a dark green and covered with "socks"which mimic the monopole's branches and needles. Due to exposure from the sun, the artificial needles have turned from the original dark green to a blue-green color. Staff Report to the Planning Commission Lands of the Town of Los Altos Hills January 6,2016 Page 2 of 4 Residential uses surround the facility on two sides with the closest residence approximately 105 feet to the north. Over the previous nine years, the Town has not received any substantive complaints regarding the operation of the wireless facility. PROPOSED PROJECT The applicant, AT&T, is requesting approval of a Site Development Permit and Conditional Use Permit for modifications to their existing antenna array which is located at the top of the monopole. In addition, this CUP modification will constitute their renewal requirement per the original conditions of approval. The proposed project involves the replacement or relocation of nine antennas at the top of the pole and the installation of a new collar just below the existing top level to support six relocated antennas. The installation of the new collar also requires the relocation of the emergency communications antennas on the pole. The existing monopine will not be enlarged or increased in height to accommodate the new antennas and all equipment will be painted to match and covered with socks for screening. New cabinets to service the antennas will be located in the existing equipment shelter. The purpose of the new antennas is to improve the performance and capacity of AT&T's LTE network. CODE REQUIREMENTS Wireless communications facilities are regulated under Section 10-1.703 (h) (2)and 10-1.1007 (1) of the Los Altos Hills Municipal Code. The project was reviewed for compliance with the requirements in the Wireless Communications Facilities Policy including co-location of facilities, location of the antenna, landscape screening, and exterior color to ensure that the facility blends with the surrounding area. The Municipal Code also requires all Conditional Use Permits to be reviewed by the Planning Commission and City Council. DISCUSSION Wireless Communications Facilities Policy The existing facility and the proposed modifications are consistent with the Town's Wireless Communications Facilities Policy (Attachment 4). The property is a Town owned parcel directly adjacent to Town Hall which contains an existing wireless communication facility and a tower designed to resemble a large conifer tree. The overall height of the structure will not change, the silhouette of the tower will not increase substantially, the antennas will be painted to blend in with the monopine, and socks (coverings over the antennas) will be incorporated to reduce the visual impact (see photos in Attachments 5 and 6). Staff is recommending that the artificial limbs and needles be replaced with a dark green material to resemble the typical conifers in the region. In addition, the fencing around the pole needs to be repaired and repainted. Electromagnetic Energy Exposure (EME) All wireless facilities emit electromagnetic energy (EME) which is strongest at the energy source (the antennas) and diminishes rapidly the further one is from that source. The EME analysis Staff Report to the Planning Commission Lands of the Town of Los Altos Hills January 6,2016 Page 3 of 4 provided by the applicant (Attachment 7) indicates that the electromagnetic radiation emitted by the proposed antennas on the site are within the Federal Communications Commission (FCC) Maximum Permissible Exposure (MPE) limits for a general population/uncontrolled exposure environment. Specifically, the Maximum Radio Frequency Exposure Limit is 0.1% of the FCC General Population MPE Limit at ground level approximately 65 feet from the monopine. Committee Recommendations The project was referred to the Environmental Design and Protection Committee (EDPC) and the Emergency Communications Committee (ECC). The EDPC expressed no concerns with the project. Scott Overstreet, co-chair of the ECC, reviewed the plans and requested that several conditions be added to the Use Permit (Attachment 8). Staff concurred and those recommendations have been included in the conditions of approval. Conditional Use Permit Findings The following findings are required to grant the Conditional Use Permit for the modification to the wireless facility: (1) The proposed use or facility is properly located in relation to the community as a whole, land uses, and transportation and service facilities in the vicinity; (2) The site for the proposed use is adequate in size and shape to accommodate the proposed use and all yards, open spaces, walls and fences, parking, loading, landscaping, and such other features as may be required by this chapter or, will be needed to assure that the proposed use will be reasonably compatible with land uses normally permitted in the surrounding area; (3) The site for the proposed use will be served by streets and highways of adequate width and pavement to carry the quantity and kind of traffic generated by the proposed use; and (4) The proposed use will not adversely affect the abutting property or the permitted use thereof Attachment 1 includes the list of findings along with facts supporting each finding. CONCLUSION The facility is operating in compliance with previous conditions of approval and the Wireless Communications Facilities Policy. The applicant has submitted an electromagnetic energy exposure report demonstrating that the facility will operate within FCC standards and the monopine will be upgraded to provide increased screening for the new and existing antennas. CEQA STATUS The proposed modification is exempt from the California Environmental Quality Act (CEQA) pursuant to Section 15301(b) of the CEQA Guidelines—Minor alteration to an existing facility. Staff Report to the Planning Commission Lands of the Town of Los Altos Hills January 6,2016 Page 4 of 4 ATTACHMENTS 1. Conditional Use Permit Findings 2. Conditions of Approval 3. Applicant's statement requesting CUP 4. Wireless Communications Facilities Policy 5. Photo Simulations 6. Photographs of Existing Facility 7. Electromagnetic Energy Exposure Report dated April 28, 2015 8. Emergency Communication Committee Recommendations 9. Site Development Plans (Planning Commission Only) ATTACHMENT 1 ATTACHMENT 1 RECOMMEND CONDITIONAL USE PERMIT FINDINGS FOR A WIRELESS COMMUNICATIONS FACILITY LANDS OF THE TOWN OF LOS ALTOS HILLS (AT&T MOBILE WIRELESS) 26379 FREMONT ROAD; FILE# 257-15-ZP-SD-CUP 1. The proposed use or facility is properly located in relation to the community as a whole, land uses, and transportation and service facilities in the vicinity. The existing wireless communication facility is located on Town owned property directly adjacent to the Council Chambers and provides cellular reception for a significant portion of the community on the east side of Interstate 280 that use AT&T and Verizon. The site is along a major road in Town and two wireless providers use the site along with multiple emergency communications operators. This project will involve a minor increase in antennas on an existing monopine and meets the requirements in the Town's Wireless Communications Facilities Policy which prioritizes locating these facilities on Town owned properties. 2. The site for the proposed use is adequate in size and shape to accommodate the proposed use and all yards, open spaces, walls and fences, parking, loading, landscaping, and such other features as may be required by this chapter or, will be needed to assure that the proposed use will be reasonably compatible with land uses normally permitted in the surrounding area. The existing facility is located in the center of a 1.57 acre site, at least 60 feet from all property lines, and along a collector type roadway with adequate access and parking to accommodate the use. The pole is designed to resemble a local conifer tree and all equipment is located within an existing rural/agricultural structure. The proposed modifications to the antennas and equipment will not alter the look of the site or the monopine and will not change access to the site. 3. The site for the proposed use will be served by streets and highways of adequate width and pavement to carry the quantity and kind of traffic generated by the proposed use. The site is located on a collector road (Fremont Road) which connects with arterial roads at the edge of Town and is designed to accommodate commercial traffic. No access from local residential streets in necessary. The amount of traffic trips generated by the proposed project will be minimal and can easily be accommodated by the existing roadway. 4. The proposed use will not adversely affect the abutting property or the permitted use thereof. The site is located on a Town owned parcel adjacent to Town Hall. The site contains an existing wireless facility and the visual impacts will be minimized by matching the color and materials of the existing pole and antennas. ATTACHMENT 2 ATTACHMENT 2 RECOMMEND CONDITIONS FOR A SITE DEVELOPMENT PERMIT AND CONDITIONAL USE PERMIT FOR A WIRELESS COMMUNICATIONS FACILITY LANDS OF THE TOWN OF LOS ALTOS HILLS (AT&T WIRELESS); 26379 FREMONT ROAD; FILE#257-15-ZP-SD-CUP PLANNING DEPARTMENT: 1. Any changes or revisions to the telecommunications facility or its use shall require an amendment to the applicable conditional use permit(s). Additionally,the Planning Director may schedule a review or revocation hearing before the Planning Commission regarding the use permit, if any condition of approval is not being met or the facility is being used inconsistent with the approved use or in violation of Town development codes. 2. No modifications to the approved plans are allowed except as otherwise first reviewed and approved by the Planning Director or the Planning Commission, depending on the scope of the changes. 3. The use permit shall expire ten(10)years from the date of approval. Renewal of the permit must be requested in writing, with appropriate fees,prior to the expiration date. 4. All modifications to the existing site leasing and shared utility agreements with the Town shall be executed prior to acceptance of plans for building plan check. 5. The applicant shall submit a signed agreement to the Town, agreeing that, should the use be discontinued by the carrier, all facilities will be removed not later than 60 days after discontinuance of the use or abandonment. In addition, a refundable deposit (to be determined) shall be provided by the operator as collateral for the removal of abandoned equipment beyond the 60 day period. The agreement shall be signed by the applicant and submitted to the Town prior to acceptance of plans for building plan check. 6. Upon completion of project construction, the applicant shall conduct testing of the AT&T and emergency communications antennas to ensure satisfactory operations of the facility, identify any interference requiring mitigation, and implement mitigation measures if needed. The applicant shall be strictly liable for interference caused by the wireless communications facilities with the Town's emergency communications systems. The operator shall be responsible for all labor and equipment costs for determining the source of the interference and all costs associated with eliminating the interference (including but not limited to engineering analysis, filtering and installing directional antennas). 7. The applicant shall defend, indemnify, and hold harmless the Town of Los Altos Hills and its agents, officers, and employees from any claim, action, or proceeding against the Town of Los Altos Hills or its agents, officers, or employees to attack, set aside, void, or annul an approval of the project to the extent such actions are brought within the time period required by Government Code Section 66499.37 or other applicable law; provided, however, that the Applicant's duty to so defend, indemnify, and hold harmless shall be subject to the Town's promptly notifying the Applicant of any said claim, action, or proceeding and the Town's full cooperation in the defense of such actions or proceedings. 8. The height at the top of the tallest antenna shall not exceed 75 feet. 9. No portions of any new antennas, equipment or support structure shall extend beyond the sides of or above the top of the monopine canopy. 10. The branches and foliage on the monopine shall be replaced with a darker green color more in keeping with the color and types of native conifers found in the local area. In addition, the fencing enclosure around the base of the monopole shall be repaired as needed and repainted. The applicant shall submit color samples to the Planning Department for review and approval prior to acceptance of plans for building plan check. 11. The antennas, cables, support structures and all other associated equipment on the monopine shall be painted to match the color of the new darker green foliage, to the satisfaction of the Planning Director,prior to final inspection of the facility. 12. No lights shall be installed on the wireless communications facility, the monopine or on the ground equipment. 13. The facility shall comply with the recommendations outlined in the Electromagnetic Energy Exposure Report prepared by OSC Engineering, Inc. dated April 28, 2015. Not later than thirty(30) days after installation and initial operation of the antenna facility, and on or prior to January 1'of each year thereafter, testing of radio frequency emissions shall be conducted by qualified professionals and the reports of such testing shall be provided in writing to the Planning Department, with comparison to applicable federal emission standards. If at any time the emission levels are shown not to comply with Federal standards, the Conditional Use Permit shall be scheduled for a revocation hearing before the Planning Commission. 14. AT&T or the operator of the site shall be responsible for repair or repainting of the proposed facilities in case of vandalism or wear and must do so within 72 hours of notice by the Town that a complaint has been received. 15. The ECC Emergency Antenna, currently located at a height of 50 feet, 7 inches from ground level, shall be placed in the area between the cell antenna rings with the antenna mounted such that the connector hub for the ECC antenna is placed at the same elevation as the top of the cell antennas directly below to provide the maximum possible open space around the ECC antenna. In addition, the replacement ECC antennas shall be remounted so that they are in uniform vertical alignment approximately four and one half feet from the pole. No encroachment into the elevation space occupied by the ECC antennas shall be permitted. 16. The communications facility shall comply with the Town's noise ordinance at all times. If the Town receives a complaint of excessive noise at the facility, then the applicant shall perform an acoustical analysis of the ground equipment to demonstrate that noise emissions from the equipment is at or below 40db at the property line. 17. The applicant shall not cause radiation in the frequencies allocated as primary to the amateur radio service and may be required to correct any and all future interference problems experienced by other licensed services. ENGINEERING DEPARTMENT: 18. Any and all changes to the approved site plan shall first be approved by the Town Engineering Department. No grading shall take place during the grading moratorium (October 15 to April 15) except with prior approval from the City Engineer. No grading shall take place within ten feet of any property line. 19. Any and all areas on the project site that have the native material disturbed shall be protected for erosion control during the rainy season and shall be replanted prior to final inspection. 20. The applicant shall inform the Town of any damage and shall repair any damage caused by the construction of the project to pathways, private driveways, and public and private roadways,prior to final inspection and release of occupancy permits and shall provide the Town with photographs of the existing conditions of the roadways and pathways prior to acceptance of plans for building plan check. CONDITIONS NUMBER 4, 5, 10 and 21 SHALL BE COMPLETED AND SIGNED OFF BY THE PLANNING AND ENGINEERING DEPARTMENTS PRIOR TO ACCEPTANCE OF CONSTRUCTION PLANS FOR PLAN CHECK BY THE BUILDING DEPARTMENT. Please refer to the Conditions of Project Approval set forth herein. If you believe that these conditions impose any fees, dedications, reservation or other exactions under the California Government Code Section 66000, you are hereby notified that these Conditions constitute written notice of a statement of the amount of such fees, and/or 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 such 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. Upon completion of the construction, a final inspection shall be required to be set with the Planning and Engineering Departments two weeks prior to final building inspection approval. NOTE: The Site Development permit is valid for one year from the approval date. All required building permits must be obtained within that year and work on items not requiring a building permit shall be commenced within one year and completed within two years. ATTACHMENT 3 June 24,2015 JUN 3 ® 2015 Nicole Horvitz T® �1 rg Town of Los Altos Hills OFLQ5A`I®Su Planning&Building Department `' HILLS 26379 Fremont Road Los Altos Hills,CA 94022 Re:Conditional Use Permit Renewal and AT&T Modification Site Address:26379 Fremont Road Site Name:856576/Los Altos Hills Dear Ms.Horvitz, Crown Castle as facility owner and AT&T as facility tenant request the renewal of Conditional Use Permit#214-05- CUP,a monopine located at 26379 Fremont Road.The facility currently supports antennas for AT&T,Verizon Wireless,and the Town Emergency Communications Committee.The monopine is 70'tall to the top of steel,with approximately 5'-6"of branching extending above the top of steel.A brown wooden fence surrounds the base of the monopine and the equipment cabinets are housed in a brown storage shed several meters west of the monopine. The monopine is located on Town-owned property,which is the top preferred location for wireless facilities.The monopine also supports two other wireless providers, meeting the goal of colocation.The facility is disguised as a monopine to blend in with the surroundings and several trees were planted when the pole was built to further shield the monopine from view.As part of the CUP renewal,any damaged or deteriorated branches will be replaced with new branches to ensure sufficient stealthing of the wireless equipment. AT&T is proposing to modify the facility as part of the CUP renewal.AT&T proposes to relocate three antennas from their existing 68' RAD center to a 48' RAD center.Three new antennas will be added at a 67' RAD center, along with three remote radio units and one surge suppressor.Three existing remote radio units will be relocated from inside the equipment area up onto the monopine. In total,the monopine will have nine AT&T antennas,six AT&T RRUs,and one surge suppressor.The new and relocated antennas will be painted to match the pine and covered with pine socks.Two new cabinets will be added inside the equipment shelter and a new 4"underground conduit will route cables from the new equipment cabinets to the antennas. No changes will be made to the exterior of the equipment shelter. AT&T does not provide antenna master plans for future sites, as the network reflects current consumer demand. Radio frequency engineers are constantly assessing coverage gaps and network needs, but their build out plans also must take into account budgets from real estate and construction.Additionally,rapid changes in technology frequently shift development patterns and alter future build plans. Since ly, aure Reimer 714-319-1101 Ireimer@core.us.com ATTACHMENT 4 TOWN OF LOS ALTOS HILLS LOSALTOSIIILLS 26379 Fremont Road Los Altos Hills, CA 94022 Phone: (650) 941-7222 .I www.losaltoshills.ca.gov CALIFORNIA Wireless Communications Facilities Policy Amended 10/12/2006 Code Sections Section 10-1.703 (h)(2) of the Zoning Ordinance allows service uses, including"communications facilities", to be permitted in the Town if a Conditional Use Permit is granted by the Planning Commission and City Council. Section 10-1.1007 (1) of the Code outlines findings which must be made to approve a use permit, including the proper location of the use or facility relative to others in the vicinity, the adequacy of the site to accommodate the use, and that the facility or use will not have an adverse effect on adjacent properties. Intent: The purpose of this policy is to outline the desired criteria for siting of wireless communications facilities, generally including monopoles, related antennas, and equipment shelters. As the Town's land use is virtually entirely residential, wireless communications facilities will be most appropriately located on public or institutional sites existing within the Town. Colocation, location on or near existing buildings, and landscape screening will be desired to minimize the visual impacts of the facilities on neighbors and the public. Policy: 1. Priorities for siting - Wireless communication facilities shall generally be located on properties with priority as follows: a. Town-owned properties b. Foothill College c. Water tanks d. Other public or quasi-public facilities, such as schools or churches e. Residential properties of at least ten (10) acres 2. Siting on residential parcels - Wireless communication facilities may be permitted on properties used for residential purposes or vacant parcels intended for residential property owner provides written consent and significant visual impacts are mitigated. 3. Colocation — Colocation of wireless communication facilities with other facilities• is encouraged to the maximum extend feasible, as long as the colocation is technologically compatible and does not substantially increase visual impacts. The Town will generally require as a condition of approval for any conditional use permit that the applicant permit colocation of other facilities, subject to technological constraints and Town review. Policy: Wireless Communication Facilities Page 2 3a. Applications for colocation on an existing wireless communications facility shall be subject to an administrative review provided that the following requirement is met: • The colocated antennas and ground equipment shall be mounted or installed within an existing tower, building, or structure where the physical appearance of the existing facility is not altered to accommodate the additional antennas and equipment. 4. Landscape screening and color - Landscape screening shall be required by the Town to minimize the visual impacts of wireless communication facilities. Poles, antennas, and equipment buildings should be painted to blend with the surrounding environment and/or buildings to further minimize visual impacts. 5. Environmental review - A Negative Declaration will typically be prepared for review of proposed wireless communication facilities, with special attention to the visual impacts of the facilities. Categorical exemptions may be used where facilities are colocated with or would be minimal additions to existing structures, with negligible additional visual impact. 6. Antenna master plans—Any applicant for a wireless communication facility site shall submit applications, to the best of their knowledge, for all sites anticipated to be required by the carrier for a three (3) to five (5) year period, and the request shall be reviewed by the Planning Commission and the City Council as a master plan application. 7. Terms of permits and abandonment of sites — Conditional use permits for wireless communications facilities shall be established for periods not to exceed five (5) years, at which time renewal of the permit must be requested by the applicant. More frequent review of the operation of the permit may be made a condition of approval. Approval will also require a written agreement from the applicant that, should the use be discontinued by the carrier, all facilities will be removed not later then ninety (90) days after discontinuance of the use or abandonment. Such a provision shall also be included in any lease with the Town for use of Town lands for wireless communications facilities. The Town may require bonding or other surety to assure the removal of such facilities. 8. Wireless communication firms shall, at the time of application for permits, demonstrate efforts which have been mad to inform neighboring residents of the proposed facilities, such as conducting meetings, or mailing fact sheets and/or letters, etc...to neighbors. 9. The Planning Director is authorized to reduce or waive permit fees for any wireless communications facility that is proven to expand wireless coverage in the Town and is structurally capable of colocation. 10. The Planning Director is authorized to administratively approve portable wireless communications facilities also known as cell on wheels or COWs on certain properties as specified in Policy#1 on a temporary basis. ATTACHMENT 5 • • • r 1 �r • • ,A 0 ; me . - • i'PITA3� ria ��t1 , i N;' �� f 'offr,,;.,••f:i4j. e :::::z.±„.7.4. }� r t S h biESf1" T� h y.a2 er�'�yd • /.µ4.y f �... > e 'c ' a_`tr s '-,.'•A'",,,., i 1 1 ' *>`-� ea, �� + /�i��? y4L 7 r� Ot t 't 4 11 1 i. x,.76 '1{�y5 �y.J r W. ' 4S / 4.:-. 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'�i, ,. 4a "t`r ,%• ;, ;? r ;zv, n. • r. .....i,',;_ }c.,,,,,,.„„3,,.. t,. ... S ,G A'`':k=a 'rte' ..,,. s '" ,,,, d a �_, dg, .17'6!"'i''7•1',.':- t _'./747- 4 ,'���... },s�6,,,N"' h- t i p r- . .S 3 � ✓j' ltir r !rr ,,..,:,,,, ..),A Irk'.. .trje:f.1'. --f!,Z -'z'-.---''''-* -''''.-'.i.,-. �- �CROWN Los Altos Hills Town Hall Site# 856576 • Aerial Map .• �CASTLE 26379 West Fremont Blvd. 5/22/15 LOS Altos,CA 94022 Applied Imagination 510 914-0500 ATTACHMENT 6 ..N-.1 ift -...- 1+”!-11.,..-tv ..-7..r1 ,,... 4 • , ..,„.:.. 'S %..7"ri" - :'.;".j"tki;•:..4 .• .,. .!:-.41, t . .....r....,L---,, . , 4. -ii.Zts'L4 . :- t •+*$t,:i ffill* . ‘*.-:"7: 1'1,74'4 .: gi ', ; ..' .IP 4,;.4-11-- '•4cs-•••• * ‘ ', ' ....1,1, •W ., .„4, ..., A ,/0""'" , ,4,eto 4.7.-„1" ...... *7. , --,F14:--r.44;14.1.6 . .di- •or• • '4 -s:1.;.* - --.'il. j'k.'• ,Y . SA•1"4' , qt4., 1: .. - • .. 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Z9S.'1a - ; - r - .I CROWN Los Altos Hills Town Hall Site# 856576 Looking Northwest from West Fremont Blvd. CASTLE 26379 West Fremont Blvd. View 42 5/22/15 Los Altos, CA 94022 Applied Imag nation 510 914-0500 r E 0rEin �= " � '_ - t NETIC ENERGY ( EME) EXP •SU E REPORT a� ‘r C , Site Name: Los Altos Hills Town Hall �, L ; Sate lD: CCL03653 ' ' ;� • �,L OSB®: 80685 R ,-- 1 - ,. _ ' ' r .,s'- - .FA Location: 10100717 i itjaotp,..s1V---' :. • r' ,}, i e ,� r ,,,:,,-...)-:-7 �r' Site Type: Stealth Pole External Array II 5 h , �, ' t i '', Wil' 11 .. ,:,..,1 - �;., , . Location: 26379 West Fremont Boulevard , s+�• ' . iI . —►-I'L I `Y '• Los Altos, CA 94022 r, ' c` •'-'t ,' r. tJ'r"' �-..C Y r-�.�Ji .; ,, -^m. �y .- '1-.k4., .. .. � '�: ; :;r " i Latitude (NsAD33): 37.38432 b., 4 , L„..) : ,; Longitude (NAD83): -122.138865 I' 29+. ',�c ..'' '` C" I" 1'Q. ' F 'a Report. Completed: April 28, 2015 .•,.�.. Yr . " '` . _`. € :' c _ `: _ _- - - ., _,-. - AT&T i -RFSC. . • Casey Chan Prepared By: y x L110 Prepared for: AT&T Mobility c/o Caldwell Compliance, Inc. Z L6900 Koll Center Parkway. ENGIN� � � � 7s►.> _ ,�1 Ste. 401 q G-1 N EER 1\ G Pleasanton, CA 94566 Site Overview and Description o The proposed antennas are mounted on a monopine o The site consists of three (3) sectors with a total of six (6) antennas Q There areseparate structures within forty (40) feet of the transmitting antennas © The site iswithin a fenced in area, access to the site is via.a gate • The site is not co-located Sector{ Sector Sector G^ - ,Azimuth 50° 300° 150° Number of antennas 2 2 2 !Bottom tip of antenna above aground (ft.) 65.8 /64 65.8/64 65.8/64 'Bottomtip of antenna above adjacent roof(ft.) 45.8/44 45.8/44 45.8/44 Technology GSM /UMTS/ LTE GSM /UMTS/LTE GSM /UMTS/ LTE Decibel TBXLHB-6565A-VTM Decibel TBXLHB-6565A-VTM Decibel TBXLHB-6565A-VTM Antenna Make and Model J Quintel QS4658-3 Quintet QS4658-3 Quintet QS4658-3 Site Compliance Status (FCC &AT&T Guidelines) Compliant with recommendations OSC Engineering Inc. l www.OSCengineering.com l 858 436 4120 Page 2/17 Compliance Results of the Proposes! Site (theoretical simulation) Max RF Exposure Level simulated (AT&T antennas @ adjacent roof): 4.10 % FCC General Population MPE Limit Max RF. Exposure Level simulated (AT&T antennas @ ground): 0.10 %FCC General Population MPE Limit OSC Engineering Inc. I www.OSCengineering.com 1858 436 4120 Page 3/17 Compliance Notes Occupational Safety & Compliance Engineering (OSC Engineering) has been contracted by Caldwell Compliance, Inc. to conduct an RF (radio frequency) computer simulated analysis. The Federal Communications Commission (FCC) has set limits on RF energy exposed to humans on a wireless cell site in order to ensure safety. The FCC has also mandated that all RF wireless sites must be in compliance with the FCC limits and a compliance check must be performed annually to ensure site compliance. This report is an in depth analysissummarizing the results of the RF modeling provided to us by AT&T and in relation to relevant FCC RF compliance standards. A reanalysis is recommended upon the site going on air. OSC Engineering uses. the FCC OET-65 as well as AT&T Standards to make recommendations based on results and information gathered from drawings and Radio Frequency Data Sheets. For this report, OSC Engineering utilized Roofview®software for the theoretical analysis of the AT&T Cellular Facility. A site-specific compliance plan is recommended for each transmitting site. This report serves as a single piece of the overall compliance plan. OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 4/17 FCC Regulations and Guidelines from OET 65 When considering the contributions to field strength or power density from other RF sources, care should be taken to ensure that such variables as reflection and re-radiation are considered. In cases involving very complex sites predictions of RF fields may not be possible, and a measurement survey may be necessary The process for determining compliance for other situations can be similarly accomplished using the techniques described in this section and in Supplement A to this bulletin that deals with radio and television broadcast operations. However, as mentioned above, at very complex sites measurements may be necessary. In the simple example shown in the below diagram, it is desired to determine the power density at a given location X meters from the base of a tower on which are mounted two antennas. One antenna is a CMRS antenna with several channels, and the other is an FM broadcast antenna. The system parameters that must be known are the total ERP for each antenna and the operating.frequencies (to determine which MPE limits apply). The heights above ground level for each antenna, Hi and H2, must be known in order to calculate the distances, !Viand R2, from the antennas to the point of interest. Antenna I HI 112 11* Antenna ISI R2 Point of Interest Y \\4 / I 44 1 OET Bulletin 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields, Page 37-38 OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 5/17 Computer Simulation Analysis The Federal Communications Commission (FCC) governs the telecommunications services, facilities, and devices used by the public, industrial and state organizations in the United States. "RoofView®is a software analysis tool for evaluating radiofrequency (RF) field levels at roof-top telecommunications sites produced by vertical collinear antennas of the type commonly used in the cellular, paging, PCS, ESMR and conventional two-way radio communications services."2 "RF near-field levels are computed from selected antennas by applying a cylindrical model that takes into account the antenna's aperture height, mounting height above the roof, azimuthal beam width for directional antennas and the location of the antennas on the roof Resulting, spatially averaged power densities are expressed as a percentage of a user selectable exposure limit depending on frequency. The entire roof is composed of one-square-foot pixels and RF fields are computed for each of these pixels for each selected antenna."3 Computer simulations produced for clients are simulated with "Uptime = 100%". This means that all transmitters associated with an antenna are considered to be "on". 4 RoofView® uses a near-field method of computing the field based on assuming that the total input power delivered to the antenna, at its input terminal, is distributed over an imaginary cylindrical surface surroundingthe antenna. The height of the cylinder is equal to the aperture height of the antenna while the radius is simply the distance from the antenna at which the field power density is to be computed. Within the aperture of the antenna, this approximation is quite accurate but as the antenna is elevated above the region of interest, the model output must be corrected for mounting height. 5 A S d h R 2ieRh 2 Roofview User Guide 4.15, Page 7, Richard A Tell Associates 3 Roofview User Guide 4.15, Page 7, Richard A Tell Associates - - 4 Roofview User Guide 4.15, Page 10, Richard A Tell Associates 5 Roofview User Guide 4.15, Page 45, Richard A Tell Associates OSC Engineering Inc. 1 www.OSCengineering.com 1 858 436 4120 Page 6/17 Antenna Inventory All technical data and specifications shown below are collected from drawings and/or documents provided by the client, as well as from online databases and/or a visit to this facility. Unknown wireless transmitting antennas are simulated using conservative values when information is not available. Operator/, Frequency Total ERP Antenna Input Power Transmitter Azimuth Antenna Horizontal I Ground j AdJ,Roof, Antenna Technology' (MHz) (Watts) Gain(ded) (watts) Antenna Type Antenna Make Antenna Model count (• Aperture(ft) Beamwldth (Z)(ft) (Z)(tt)• Al AT&T UMTS 850 1406.8 12.45 80 Panel Decibel TBXLHB-6565A-VTM 2 50 4.34 72 65.8 45.8 Al AT&T UMTS 1900 2501.8 14.95 80 ,Panel Decibel TBXLHB-6565A-VTM 2 50 4.34 65 65.8 45.8 A2 AT&T.GSM 850 505.4 11.85 33 Panel Quintel QS4658-3 2 50 6.04 66 64 44 A2 AT&T LTE 700 819.0 11.35 60 Panel Quintel QS4658-3 2 50 6.04 74 64 44 A2 AT&T LTE 1900 3667.2 14.85 120 Panel Quintel QS4658-3 2 50 6.04 72 64 44 B1 AT&T UMTS 850 1406.8 12.45 80 Panel Decibel TBXLHB-6565A-VTM 2 300 4.34 72 65.8 45.8 B1 AT&T UMTS 1900 2501.8 14.95 80 Panel Decibel TBXLHB-6565A-VTM 2 300 4.34 65 65.8 45.8 B2 AT&T GSM 850 505.4 11.85 33 Panel Quintel QS4658-3 2 300 6.04 66 64 44 B2 AT&T LTE 700 819.0 11.35 60 Panel Quintel QS4658-3 2 300 6.04 74 64 44 B2 AT&T LTE 1900 3667.2 14.85 120 Panel Quintel QS4658-3 2 300 6.04 72 64 44 G1 AT&T UMTS 850 1406.8 12.45 80 Panel Decibel TBXLHB-6565A-VTM 2 150 4.34 72 65.8 45.8 G1 AT&T UMTS 1900 2501.8 14.95 80 Panel Decibel TBXLHB-6565A-VTM 2 150 4.34 65 65.8 45.8 G2 AT&T GSM 850 505.4 11.85 33 Panel Quintel Q54658-3 2 150 6.04 66 64 44 �" G2 AT&T LTE 700 819.0 11.35 60 Panel Quintel QS4658-3 2 150 6.04 74 64 44 G2 AT&T LTE 1900. . 3667.2 14.85 120 Panel Quintel QS4658-3 2 150 6.04 72. 64 44 OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 7/17 Theoretical Simulation Result Diagram - Cumulative Ground Level (Max Emission = 4.10% GP) For the purpose of theoretical Stte 10:CC1036Y' Site Nome,los At4oS Hai$Town No! simulation, OSC Engineering LEGEND Snc1ar models antennas as if they are 1111, AT&T sly qtps Unknown operating at full power (100% „ ire capacity). This assumption yields Cricket F1--1 \more conservative (higher) le Metro PCS Sector B :•Yresults. On-site measurements sprint `--� 3C0° may yield different results, as c4, T-M o b i i e 1 antennas do not always operate 'e v° ` i Z ° n i1001 Bodo,c •at full capacity. To the right iso a m n i i ►s� ' • result diagram of the site in 1----- question. The diagram is a color- Antenna{ N.t.S. coded map per ND-00059 levels, which coincide with FCC MPE CLCup:Olan lMPE Lima EI So or 1E1 Soler Puna °arni Limits. Any exposure resulting in a Exposvr.Love!X WOO III Snla�on�C� level higher than 100% exceeds (E)BudO,W • the Limits and requires further 30%r,fl¢w,.° ,«: ^—__---I action, such as barriers. A level (FI Scour . exceeding 100% does not make Gamma'Population ' mt.., a site out of compliance. All UPI Limit results are given in General 4w:4w*troll asopa Population percentages even IE1 Solar rage when a site may be considered 100%E;rpow•o„300 0 • Occupational. a � 30' OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 8/1 7 Theoretical Simulation Result Diagram - Cumulative Adjacent Roof Level (Max Emission = 0.10% GP) Site ID: C 03653 Site Name: Los Altos Hills Tow Hall LEGEND Sector A AT&T 50° Unknown --- - \ Mai Clearwire —i Cricket 1 i<�� � • •r" • '\ r` gyp Metro PCS I p i 1 Sector B ' ii. 1 `\ Sprint 1 1 1 300° �.v . 1 T - Mobie I I I °' 'a Verizon ---2-1. (El Solar Panel Sector G • • Omni 1 i 150° .., Dish i i 1 Antennas N.T.S. 5 Occupational MPE Limit (E)Solar (E) Solar \ Panes Pana+ t Ex¢ostrrr3 Level i IMO' (E) Solar panel \ •• (E) Building • 20.5 Expoav e c 100 I I ,1 (El Solar (E} Svlar Panel ——— i Panot Gororal Population t MPE Limit ‘ Ext;,aturr) — 1 (E) Solar Panel 100 s Exposure < 500 30' 0 30' 0\ OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 9/17 Theoretical Simulation Result Diagram - AT&T Mobility only Ground Level (Max Emission = 4.10% GP) Site ID: .. . -' - Site Name: LEGEND Sector A AT&T 50e Unknown _ .- Clearwire • r----1, Cricket - = ----- -.. '. ...., ri -1 , , .. . . i Metro PCS , Sector B lio7, " \ . 1 Sprint li 'I 30(7 I • • . i 1. . T - Mobi ! e I . \ , Verizon i----1-- —I — (E) Solar Ponei Sector G \ • Omni 1 1 ! ;—'7 . i_ 150° . . \ \ \ isDh \ \ t 1 1 1 _,....„....,...--!:------- . \ /_ _ ___ _ _,....----- . \ \ \ Antennas t4.T.S. _ (E)Solar (E)Solar! Panel Pane,/ 0 --- -,-.'''--'-- \ . \ \ \ s• \ \ \,, \ \ \ \ \ \ (E) Solar Panel \ \ • , •-• R 14: t:7.) ,U1....,15-1 \ Occupational MPE Limit i \ \ (---- \ \ \ I s Exposure \ I ( I Solar \ \ 0 s Exposure < 1 (E)Solar \.........„..,\<:„....e...........„....„--- , . General Population :). ---' MPE Limit , 5 5 Exposure (E) Solar Panel A '. 0 5 Fxoosure < 5 300 30' N • OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 10/17 Theoretical Simulation Result Diagram - AT&T Mobility only Adjacent Roof Level (Max Emission = 0.10% GP) Site ID: CCL03653 Site Nome: Los Altos Hills Town He(( LEGEND Sector A AT&T 50° Unknown — — Clearwire -. C ri c k e ' j � -'— ', i n 7° Metro PCS � is i 300° ,I•-. . \ , T ~Mobi e I I I %' ` j 1 verizon ' (El Solar Panel Sector G , • • Omni i 150° \ �� Dish i \ \ I-1 \ \ 1 1 i.r.:�j f-i;-,u i it-,.. \ (E)Solar (E) Solar \ \ Panel Panel \ 1 (E) Solar Pane: \ \ Occupational MPE lirnit (E) Building \ .f.L :yj .. t (E{Solo( \ 0<_ ?'xp .w,, (E) Solar Panel • — — _ Panel \ \ • General Population MPE limit 1. (E) Solar Panel 5 S Exp niurr� 0=fxpo ur 6 30' _ 0 30' 0 ' _________. OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 11/17 • Certification The undersigned is a Professional Engineer, holding a California Registration No. 19677 Reviewed and approved by: ,__ ,S.,-\V .,)1/. 1/4----.../ ..) I'' r ,?i j_P9 ui _,,„ , ,,,,,,,(19677 ii 1) ti, ,,. xa: ./ 9/30/15/-ti .,:".57 t. John B. Bachoua, PE Date: April 28, 2015 The engineering and design of all related structures as well as the impact of the antennas on the structural integrity of the design are specifically excluded from this report's scope of work. This report's scope of work is limited to an evaluation of the Electromagnetic Energy (EME) RF emissions field generated by the antennas listed in this report. When client and others have supplied data, it is assumed to be correct. OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 12/17 FCC MPE Limits (from OET-65) OSC Engineering uses the FCC's and clients' guidelines to model the computer simulation. Explained in detail in Office of Engineering & Technology, Bulletin No. 65 ("OET-65") "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Radiation". Occupational/controlled6 exposure limits apply to situations in which persons are exposed as a consequence of their employment and in which those persons who are exposed have been made fully awareof the potential for exposure and can exercise control over their exposure. Occupational/controlled exposure limits alsoapply where exposure is of a transient nature as a result of incidental passage through a location where exposure levels may be above general population/uncontrolled limits (see below), as long as the exposed person has been made fully aware of the potential for exposure and can exercise control over his or her exposure by leaving the area or by some other appropriate means. As discussed later, the occupational/controlled exposurelimits also apply to amateur radio operators and members of their immediate household. General population/uncontrolled7 exposure limits apply to situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore, members of the general public would always be considered under this category when exposure is not employment-related, for example, in the case of a telecommunications tower that exposes persons in a nearby residential area. 6 OET-65 "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields pg. 9. OET-65 "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields pg. 9. OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 13/17 Limits for Maximum Permissible Exposure (NIPE)8 "The FCC Exposure limits are based on data showing that the human body absorbs RF energy at some frequencies more efficiently than at others. The most restrictive limits occur in the frequency range of 30-300MHz where whole-body absorption of RF energy by human beings is most efficient. At other frequencies whole-body absorption is less efficient, and, consequently, the MPE limits are less restrictive."9 (A) Limits for Occupational/Controlled Exposure Frequency Electric Field Magnetic Field Power Density (5) Averaging Time Range (MHz) Strength (E) (Vim) Strength (H) (A/m) (mW/cm2) 1 E 12, I H{2 or S minutes 0.3-3.0 614 1.63 (100)' 6 3.0-30. .. 1842/f 4.89/f (900/f2)' 6 32-300 61.4 0.163 1.0 • 6 300-1500 — — f/300 6 1500-100,000 — -- 5 6 (B) Limits for General Population /Uncontrolled Exposure Frequency Electric Field Magnetic Field Power Density (S) Averaging Time Range (MHz) Strength (E) (V/rn) Strength (H) (NM) (mW/cm'-) I E 12, )H 12 or S (minutes 0.3-1.34 614 1.63 (100)" 30 1:34-30 824/f 2.19/f (180/) 30 30-300 27.5 0.073 0.2 30 300-1500 -- -- f/1500 30 1500-100,000 -- -- 1.0 30 f= Frequency in MHz 'Plane-wave equivalent power density 8 OET-65 "FCC Guidelines Table 1 pg.72. 9 OET-65 "FCC Guidelines for Evaluating Exposure to RF Emissions", pg.8 OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 14/17 • Limits for Maximum Permissible Exposures-(MPE) continued 10 Figure 1. FCC Limits for Maximum Permissible Exposure(MPE) Plane-wave Equivalent Power Density 1,000 I I I I I I I i I Occupational/Canirolger/Exposure I---- General Population/Uncontrolled Exposure; 100- 10- 5- 7\\‘‘‘ \\ - 0.1 I I I I l I I I' 0.03 0.3 r 3 30 300 13,000 30,000 1.300,000 1.34 1,500 100,000 Frequency (5.4Hz) • •"MPE Limits are defined in terms of power density (units of milliwatts per centimeter squared: mW/cm2), electric field strength (units of volts per meter: V/m) and magnetic field strength (units of amperes per meter: A/m). In the far-field of a transmitting antenna, where the electric field vector (E), the magnetic field vector (H), and the direction of propagation can be considered to be all mutually orthogonal ("[plane-wave" conditions], these quantities are related by the • following equation: ag - 37 71/44- 3770 1/�3770 where: S = power density(m k 2) B =electric field s~rrei th(Vim) H=imagnetic field strength( ,1m) 10-0ET-65 "FCC Guidelines Table 1 pg. 72. OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 15/17 Limitations OSC Engineering completed this evaluation analysis based on information and data provided by the client. The data provided by the client is assumed to be accurate. Estimates of the unknown, standard, and additional transmitting sites are noted and based on FCC regulation and client requirements. These are estimated to the best of our professional knowledge. This report is completed by OSC Engineering to determine whether the wireless communications facility complies with the Federal Communications Commission (FCC) Radio Frequency (RF) Safety Guidelines. The Office of Engineering and Technology (OET-65) Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Radiation has been prepared to provide assistance in determining whether proposed or existing transmitting facilities, operations or devices comply with limits for human exposure to radiofrequency (RF) fields adopted by the Federal Communications Commission (FCC)11. As each site is getting upgraded and changed, this -- report will become obsolete as this report is based on current information per the client, per the date of the report. Use of this document will not hold OSC Engineering Inc. nor it's employees liable legally or otherwise. This report shall not be used as a determination as to what is safe or unsafe on a given site. All workers or other people accessing any transmitting site should have proper EME awareness training. This includes, but is not limited to, obeying posted signage, keeping a minimum distance from antennas, watching EME awareness videos and formal classroom training. 11 OET-65 "FCC Guidelines for Evaluating Exposure to RF Emissions", pg. 1 OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 16/17 . .. RECOMMENDATIONS °Access Point Site ID: CCL03653 Site Nome: LOS Attel.Hills Ter;tin Hell Information 1 Sign @ =existing sign Sector A access gate or base of tz2=1 . 50° monopine (to be ;--- --- :.-,-1 cz,..-7L,..-n ,-- „- -.•• posted) _ . -- \ \ Tower Caution Sign @ Sector.8 i ° s base of monopine (to Info I 300 \ . \ \ be posted) / Sector G \ i ISO' _ \ \ 0AT&T Sector A Info 3 IMO 4 (E.'Sola______r Pcin;a.;14..:71i 4rwa wf::--;=7:1:1 \ \ No Action Required - - - ; NMI i %O.41 .'i \ \ \ \ , \IIEJ Soicr fEl Soler \ \ CAT&Y Sector B ,N-°IIce- i:tc3ftiO i Penal I,Penni/ 1\ , \ \ 5Ig9 No Action Required --„,/ -;7,1M„,, —raLtiMit IE)Soler l'ent31 1 \ \ ( 1 Cluile47.0 \ \ 1 : \ rir----•-_ -7 \ -AT&T Sector G ,--_-__4:-7:7-1 ... :: i j Soler I PSDancier I i II E il 1" \, ': =.: 1 IF7.7.7.7=- , \ No Action Required Ceti:ion Courion L.Panor li lewer Sign SIgn L.,., ---- / \\,-*'''''''''''''' 1F)Solos j.Tv, - 1 7:::;'::,;:'--i:;:, :' i;T:--:.:::-'i7 7 • --. ^ -______ _ _. ________' 30 0 30' , ' 1 C-auflon Nofico N *2 Sign 02 Sign 11. 1_1_111___II!ei--- 1 J OSC Engineering Inc. I www.OSCengineering.com I 858 436 4120 Page 17/17 ATTACHMENT 8 Steve Padovan From: Scott <scott@becklawfirm.com> Sent: Monday, October 26, 2015 10:02 AM To: Steve Padovan Cc: Jim Abraham; 'Scott Overstreet' Subject: ECC comments on revised plans for Town Hall Cell Tower antenna replacement Steve Patovan Consulting Planner Town Of Los Altos Hills 6379 Fremont Road Los Altos Hills, Ca 94022 Steve- Per my telephone message this morning, I have reviewed and conditionally approve the resubmitted drawing package titled "AT&T LOS ALTOS HILLS TOWN HALL CNU3563/CCL03563" which was received by the Town on Oct. 2, 2015. This is a resubmittal of the same request first received on June 30, 2015 requesting the Town's approval of work proposed to be done at the "cell" installation on Town property at 26379 Fremont Road, Los Altos Hills, CA 94022. My approval is based upon corrections that were made to the A-4 drawing (the resubmitted A-4 drawing now shows our four ECC "EMERGENCY" antennas rather than five, which was a mistake in the original drawing) but conditionally that the third from the bottom ECC "EMERGENCY" antenna be placed in the area between the "cell" antenna "rings" essentially as shown by the new A-4 drawing but specifically, with the understanding that we would like this antenna mounted such that the connector hub of our antenna is placed essentially at the elevation of the top of the cell antennas below it so as to provide maximum open space above it. Also, as it will be necessary to remove and replace all three of our three lower antennas in the process of replacing the foliage on the tree, I also want it agreed to that these antennas will be remounted such that they are in uniform vertical alignment approximately four and a half feet from the "trunk" of the tree as they initially were and now are. My final acceptance at the time of project completion will be that there is no encroachment by cell antennas into the elevation space occupied by our antennas and this includes cell antenna feed-lines and support structures, and that our emergency antennas are mounted as noted above. As I suggested, I think that refurbishment of the equipment and tower surrounding fences should be added to the tree foliage replacement requirement list. The paint condition on the fences is not generally bad, but there are several "bats" that have come loose. These should be replaced and painted as required for uniformity. Please ask by return email, if you need more from me. Scott Overstreet Co-Chair Los Altos Hills Emergency Communication Committee 1