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Home My WebLink About3.2Item 3.2 TOWN OF LOS ALTOS HILLS September 1, 2011 Staff Report to the Planning Commission SUBJECT: MODIFICATIONS TO A CONDITIONAL USE PERMIT FOR A WIRELESS COMMUNICATIONS FACILITY AND A VARIANCE TO LOCATE THE ASSOCIATED GROUND EQUIPMENT WITHIN THE FRONT SETBACK. LANDS OF PURISSIMA HILLS WATER DISTRICT (APPLICANT: AT&T); 26451 ASCENSION DRIVE; FILE #36 -11 -CUP -VAR FROM: Nicole Horvitz, Assistant Planneroj? APPROVED: Debbie Pedro, AICP, Planning Director DP RECOMMENDATION: That the Planning Commission: Forward a recommendation .to the City Council to approve the requested modifications and variance for the existing/previously approved Wireless Communications Facility, subject to the recommended Conditions of Approval in Attachment 1 and Findings of Approval in Attachment. 2. BACKGROUND On July 17, 2003, the City Council approved a Conditional Use Permit and a variance for a Wireless Communications Facility at the Purissima Hills Water District water storage facility at 26451 Ascension Drive (file # 41 -03 -CUP -VAR). On May 28, 2009, the City Council approved the Conditional Use Permit to be renewed for ten (10) years (file # 21 -09 -CUP). The existing Wireless Communications Facility consists of a 28' tall steel monopole at the south side of the Purissima Hills Water District property. Four (4) antennas are currently mounted on the pole at 24' from grade. The associated ground equipment is located on an 8'x18' concrete pad east of the existing pump house, which was previously approved to be located within the front setback. DISCUSSION The Purissima Hills Water District property is located on the west side of Ascension Drive. The property is used as water storage and an operations facility. Existing structures on the property include a maintenance building, pump house, storage building, two (2) water tanks, 28' tall monopole, and three (3) associated ground equipment cabinets. Surrounding uses include family residences to the north, west, south, and across Ascension Drive to the east. Staff Report to the Planning Commission Lands of Purissima Hills Water District (AT&T) September 1, 2011 Page 2 of 6 The applicant is proposing to add two (2) new panel antennas (52" H x 12" W x 6" D), four (4) new RET'S (remote electrical tilt) one (1) new ray cap, and four (4) new RRU's to the existing 28' tall steel monopole. In addition, three (3) new ground equipment cabinets are proposed on a 64 square foot concrete pad, in the same vicinity as the existing cabinets. . The proposed modifications to the existing wireless facility are for the new LTE (Long Term Evolution) 4G technology and will increase data speed to uplink and downlink for cell phones and handheld devices. Variance Per Section 10-1.505 of the Los Altos Hills Municipal Code, "no structure, nor portion thereof, other than driveways, including necessary backup areas; walkways; minor ornamental garden structures subject to the height limits specified in Section 10-1.504(f); fences; driveway light fixtures, limited to one fixture on each side of a driveway, for a maximum of two (2) fixtures per lot, subject to the height limits specified in Section 10-1.504(h); or underground utility facilities, shall be constructed, altered, or maintained so as to be located between the property line and any setback line." The applicant is requesting to install the three (3) new ground equipment cabinets on an 8'x8' concrete pad which will encroach within the front property line setback. Due to the topography of the site, existing development, and open space easement along the west, south, and east property lines, the locations to place the ground equipment is limited. Two (2) of the ground cabinets ( 29" H x 24" W x 20" D) will be stacked one on top of the other and the third cabinet (72" H x 30" W x 36.1" D) will stand alone. Because of the existing vegetation along Ascension Road, the equipment cabinets will not be visible from off site. Wireless Communications Facilities Policy Pursuant to the Town's Wireless Communications Facilities Policy, the applicant has submitted a 3-5 AT&T antenna master plan for the Los Altos Hills and Los Altos areas and coverage map (Attachment 6). CONCLUSION The facility is operating in compliance with conditions of the approved Conditional Use Permit and the Wireless Communications Facilities Policy. The applicant has submitted a report demonstrating that the proposed facility will operate within federal RF emissions standards and guidelines (Attachment 3). Staff Report to the Planning Commission Lands of Purissima Hills Water District (AT&T) September 1, 2011 Page 3 of 6 CEQA STATUS The proposed application is exempt from California Environmental Quality Act (CEQA) pursuant to Section 15301(a) of the CEQA Guidelines. ATTACHMENTS L Original Conditions of Approval(July 17, 2003) with amended conditions #5-9 2. Findings of Approval 3. Radio Frequency Emissions report by EBI Consulting dated August 18, 2011 4. AT&T 3-5 Year Antenna Master Plan & Coverage Map 5. Photo Simulations 6. Wireless Communications Facilities Policy 7. Site Development Plans Attachment 1 ATTACHMENT 1 CONDITIONAL USE PERMIT FOR A WIRELESS COMMUNICATIONS FACILITY LANDS OF PURISSIMA HILLS WATER DISTRICT 26451 ASCENSION DRIVE: FILE W21 -09 -CUP PLANNING DEPARTMENT: 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. 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. 3. The monopole shall be painted to the satisfaction of the Planning Director, prior to final inspection of the facility. The equipment units/shelters shall be painted a color, to be determined by the Planning Department, to blend with the surrounding environment prior to final inspection of the facility. 4. Landscape screening of the. equipment structures may be required by the Planning Department upon final inspection, if determined to be necessary. 5. 64 square feet of hardscape shall be removed from the site, in order to comply with the maximum development area on the property, prior to final inspection. 6. No portion of the ground equipment shall obstruct 'or encroach within the open space easement. 7. No trenching shall be conducted within the open space easement. 8. No trees shall be removed. If a tree is required to be removed, the applicant shall replace the tree at a 1:1 ratio with a like tree species and size, prior to final inspection. 9. The radio frequency emissions report shall be revised to include an actual measurement, not a modeled measurement, prior to acceptance of plans for building plan check. 10. 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 then 90 days after discontinuance of the use or abandonment. The agreement shall be drafted by the City Staff Report to the Planning Commission Lands of Purissima Hills Water District (AT&T) September 1, 2011 Page 5 of 6 Attorney, and must be signed by the applicant and submitted to the Town prior to acceptance of plans for building plan check. 11. Not later then 30 days after installation and initial operation of the antenna facility, and on or prior to January 1St 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 of applicable Federal emissions standards. If at any time the emission levels are shown not to comply with Federal standards, the use permit shall be scheduled for a revocation hearing before the Planning Commission. ENGINEERING DEPARTMENT: 12. Any, and all, changes to the proposed 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. 13. 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 CONDITION NUMBERS 9 & 10 SHALL BE COMPLETED AND SIGNED OFF BY THE PLANNING DEPARTMENT AND THE ENGINEERING DEPARTMENT PRIOR TO ACCEPTANCE OF CONSTRUCTION PLANS FOR PLAN CHECK BY THE BUILDING DEPARTMENT. Attachment 2 Staff Report to the Planning Commission Lands of Purissima Hills Water District (AT&T) September 1, 2011 Page 6 of 6 ATTACHMENT 2 FINDINGS OF APPROVAL FOR A SETBACK VARIANCE FOR A WIRELESS COMMUNICATIONS FACILITY; LANDS OF PURISSIMA HILLS WATER DISTRICT (APPLICANT AT&T); 26451 ASCENSION DRIVE; FILE # 36 -11 -CUP -VAR 1. Because of exceptional and extraordinary circumstances applicable to the subject property, including size, shape, topography, location or surroundings, the strict application of the provisions of this Title is found to deprive such property of privileges enjoyed by other properties in the vicinity and under identical zoning classification; Due to the existing development on the site, topography, and the open space easement, locations for placement of the ground equipment is limited. In addition, the property is a water tank facility; the proposed ground equipment is consistent with the existing utility uses on the site. 2. Upon the granting of the variance, the intent and purpose of the applicable sections of the Zoning Ordinance will still be served and the recipient of the variance will not be granted special privileges not enjoyed by other surrounding property owners. If this application is approved, the purpose and intent of the Zoning Ordinance is still served. This would not be a grant of special privilege because the Town has granted a setback Variance for wireless proposals with previous applications. The equipment will not be visible from off site by the neighboring properties due to the existing vegetation and slope of the property. 3. The granting of such variance will not be materially detrimental to the public welfare or injurious to the property, improvements or uses within the immediate vicinity and within the same zoning district. The granting of the Variance for encroachment into the setback would limit potential impacts to neighbors or property owners because the proposed location of the ground equipment is the same vicinity as the previously approved ground equipment. The proposed antennas and ground equipment meet the FCC limits for human exposure and the installations will be completed to Building Code standards. No detriment to public welfare is anticipated. Radio Frequency — Electromagnetic Energy (RF-EME) Compliance Report Prepared for: AT&T Mobility, LLC c/o The Lyle Company 3140 Gold Camp Drive Suite 30 Rancho Cordova, CA 95670 A=10 "QT " ` _ IL -J LJ 1 CONSULTING Creating Value for Your Business Attachment 3 USID# 24152 Site No. CNU 1811 Foothill Expy 26451 Ascension Drive Los Altos Hills, California 94022 Santa Clara County 37.383470; -122.142450 NAD83 EBI Project No. 62101511 February 21, 2011 Revised August 18, 2011 t. f y. USID# 24152 Site No. CNU 1811 Foothill Expy 26451 Ascension Drive Los Altos Hills, California 94022 Santa Clara County 37.383470; -122.142450 NAD83 EBI Project No. 62101511 February 21, 2011 Revised August 18, 2011 RF-EME Compliance Report USID No. 24152 Site No. CNU181 1 EBI Project No. 62101511 26451 Ascension Drive, Los Altos Hills, California TABLE OF CONTENTS EXECUTIVESUMMARY..................................................................................................................... 1.0 SITE DESCRIPTION................................................................................................................ 3 2.0 FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS ................................... 3 3.0 AT&T RF EXPOSURE POLICY REQUIREMENTS.................................................................... 5 4.0 WORST-CASE PREDICTIVE MODELING................................................................................. 5 5.0 RECOMMENDED SIGNAGE/COMPLIANCE PLAN.................................................................... 7 6.0 SUMMARY AND CONCLUSIONS............................................................................................. 8 7.0 LIMITATIONS Appendix A Personnel Certifications Appendix B Antenna Inventory Appendix C RoofView® Export File Appendix D RoofView® Graphic Appendix E Compliance/Signage Plan .......................................................................... 8 APPENDICES d Ulm EBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 i RF-EME Compliance Report EBI Project No. 6210151 1 EXECUTIVE SUMMARY Purpose of Report USID No: 24152 Site No. CNU 181 1 26451 Ascension Drive, Los Altos Hills, California EnviroBusiness Inc. (dba EBI Consulting) has been contracted by AT&T Mobility, LLC to conduct radio frequency electromagnetic (RF-EME) modeling for AT&T Site CNU 1811 located at 26451 Ascension Drive in Los Altos Hills, California to determine RF-EME exposure levels from proposed AT&T wireless communications equipment at this site. As described in greater detail in Section 2.0 of this report, the Federal Communications Commission (FCC) has developed Maximum Permissible Exposure (MPE) Limits for general public exposures and occupational exposures. This report summarizes the results of RF-EME modeling in relation to relevant FCC RF-EME compliance standards for limiting human exposure to RF-EME fields. 11 This report contains a detailed summary of the RF EME analysis for the site, including the following: ■ Antenna Inventory ■ Site Plan with antenna locations ■ Antenna inventory with relevant parameters for theoretical modeling ■ Graphical representation of theoretical MPE fields based on modeling ■ Graphical representation of recommended signage and/or barriers This document addresses the compliance of AT&T's transmitting facilities independently and in relation to all collocated facilities at the site. Statement of Compliance A site is considered out of compliance with FCC regulations if there are areas that exceed the FCC exposure limits and there are no RF hazard mitigation measures in place. Any carrier which has an installation that contributes more than 5% of the applicable MPE must participate in mitigating these RF hazards. As presented in the sections below, based on worst-case predictive modeling, there are no modeled areas on any accessible ground -level walking/working surface related to the proposed antennas that exceed the FCC's occupational or general public exposure limits at this site. AT&T Recommended Signage/Compliance Plan AT&T's RF Exposure Policy guidance, dated March 31, 2009, requires that: I. All sites must be analyzed for RF exposure compliance; 2. All sites must have that analysis documented; and 3. All sites must have any necessary signage and barriers installed. Site compliance recommendations have been developed based upon protocols presented in AT&T's RF Exposure Policy guidance document, dated March 31, 2009, additional guidance provided by AT&T, EBI's understanding of FCC and OSHA requirements, and common industry practice. Barrier locations have been identified (when required) based on guidance presented in AT&T's RF Exposure Policy guidance document, dated March 31, 2009. The following signage is recommended at this site: ■ Green INFO I signposted at the base of the monopole BBI 21 B Street 0 Burlington, MA 01803- 0 1.800.786.2346 1 RF-EME Compliance Report EBI Project No. 62101511 USID No. 24152 Site No. CNLI181 1 26451 Ascension Drive, Los Altos Hills, California ■ Yellow CAUTION sign posted at the base of the monopole The signage proposed for installation at this site complies with AT&T's RF Exposure Policy and therefore complies with FCC and OSHA requirements. No barriers are recommended for this site. More detailed information concerning site compliance recommendations is presented in Section 5.0 and Appendix E of this report. EBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 2 RF-EME Compliance Report EBI Project No. 62 10 1511 1.0 SITE DESCRIPTION USID No. 24152 Site No. CNU 1811 26451 Ascension Drive, Los Altos Hills, California This project involves the proposed installation of up to two (2) wireless telecommunication antennas to four existing antennas on a monopole, in Los Altos Hills, California. There are two Sectors (A and C) proposed at the site, with three (3) antennas that may be installed per sector. In each sector, there is proposed to be one UMTS antenna transmitting in the 850 MHz and two bands in the 1900 MHz frequency ranges, one GSM antenna transmitting in the 850 MHz and the 1900 MHz frequency ranges, and one LTE antenna transmitting in the 700 MHz and 1710. MHz frequency ranges. The Sector A antennas will be oriented 0° from true north. The Sector C antennas will be oriented 120° from true north. The bottoms of the antennas will be 23.7 feet above ground level. Appendix B presents an antenna inventory for the site. Access to this site is accomplished via a gate in the fence surrounding the water tower compound. Workers must be .elevated to antenna level to access them, so these antennas are not accessible to the general public. 2.0 FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS The FCC has established Maximum Permissible Exposure (MPE) limits for human exposure to Radiofrequency Electromagnetic (RF-EME) energy fields, based on exposure limits recommended by the National Council on Radiation Protection and Measurements (NCRP) and, over a wide range of frequencies, the exposure limits developed by the Institute of Electrical and Electronics Engineers, Inc. (IEEE) and adopted by the American National Standards Institute (ANSI) to replace the 1982 ANSI guidelines. Limits for localized absorption are based on recommendations of both ANSI/IEEE and NCRP. The FCC guidelines incorporate two separate tiers of exposure limits that are based upon occupational/controlled exposure limits (for workers) and general public/uncontrolled exposure limits for members of the general public. Occupational/controlled 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 aware of the potential for exposure and can exercise control over their exposure. Occupational/ controlled exposure limits also apply where exposure is of a transient nature as a result of incidental passage through a location where exposure levels. may be above general public/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. General public/uncontrolled 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. Table I and Figure I (below), which are included within the FCC's OET Bulletin 65, summarize the MPE limits for RF emissions. These limits are designed to provide a substantial margin of safety. They vary by frequency to take into account the different 'types of equipment that may be in operation at a particular facility and are "time -averaged" limits to reflect different durations resulting from controlled and uncontrolled exposures. �' EBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 3 RF-EME Compliance Report EBI Project No. 62101511 USID No. 24152 Site No. CNU 181 1 26451 Ascension Drive, Los Altos Hills, California The FCC's MPEs are measured in terms of power (mW) over a unit surface area (cm2). Known as the power density, the FCC has established an occupational MPE of 5 milliwatts per square centimeter (mW/cm2) and an uncontrolled MPE of I mW/cm2 for equipment operating in the 1900 'MHz frequency range. For the AT&T equipment operating at 850 MHz, the FCC's occupational MPE is 2.83 mW/cm2 and an uncontrolled MPE of 0.57 mW/cm2. These limits are considered protective of these populations. Table If Limits for Maximum. Permissible Exposure (MPE) (A) Limits forOccupational/..Controlled Exposure ,x r Frequency Range Electric Feld £ Magnetic Field 4 Power ensit Dy (S) Averaging Time; .: (MHz)Strenigth (E); Strength (H) 2 2 [E] , [H] (mW/c m2) "(minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (9001e)* 6 30-300 61.4 0.163 1.0 6 300-1,500 -- -- f/300 6 . 1,500-100,000 -- -- 5 6 G E (B) Limits for General Public/Uncontrolled Exposure z 4 r ; h Frequency Range Electric Field Magnetic Field Power Density (S) Averaging Time, Strength (E);Strength (H) 2 (Ahm) (mWlcm) (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (I 80/ )* 30 30-300 27.5 0.073 0.2 30 300-1,500 -- -- f/ 1,500 30 1,500-100,000 -- -- 1.0 30 f = Frequency in (MHz) * Plane -wave equivalent power density i ure 1. FCC Limits for Maximum Permissible Exposure (MPE) Plane -wave Equivalent Power Density ,000 OccupaGonaUCantrolled Exposure Cenral PopulariawUncontrolled Exposure 100 --- \ 70 \ 5- - \ i 0.2 -----' 0.1 0.03 0.3 3 30 300 j 3,000 30,000 1300,000 Win Frequency (MHz) 1.5C0 100.000 Based on the above, the most restrictive thresholds for exposures of unlimited duration to RF energy for several personal wireless services are summarized below: 111 EBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 4 RF-EME Compliance Report USID No. 24152 Site No. CNU 181 1 EBI Project No. 62 10 151 1 26451 Ascension Drive, Los Altos Hills, California ' �} � Approx�m'ate '; Occupational l less Service PersonaWirePublic MPE - Frequency MPE'j Personal Communication(PCS)1,950 MHz 5.00 MW/CM2 1.00 mW/cm Cellular Telephone 870 MHz 2.90 MW/CM2 0.58 mW/cm Specialized Mobile Radio 855 MHz 2.85 mW/cm' 0.57 mW/cm Most Restrictive Freq, Range - 30-300 MHz 1.00 mW/cm 0.20 mW/cm MPE limits are designed to provide a substantial margin of safety. These 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. Personal Communication (PCS) facilities used by AT&T in this area operate within a frequency range of 850-1900 MHz. Facilities typically consist of: 1) electronic transceivers (the radios or cabinets) connected to wired telephone lines; and 2) antennas that send the wireless signals created by the transceivers to be received by individual subscriber units (PCS telephones). Transceivers are typically connected to antennas by coaxial cables. Because of the short wavelength of PCS services, the antennas require line -of -site paths for good propagation, and are typically installed above ground level. Antennas are constructed to concentrate energy towards the horizon, with as little energy as possible scattered towards the ground or the sky. This design, combined with the low power of PCS facilities, generally results in no possibility for exposure to approach Maximum Permissible Exposure (MPE) levels, with the exception of areas directly in front of the antennas. 3.0 AT&T RF EXPOSURE POLICY REQUIREMENTS AT&T's RF Exposure Policy guidance, dated March 31, 2009, requires that: 1. All sites must be analyzed for RF exposure compliance; 2. All sites must have that analysis documented; and 3. All sites must have any necessary signage and barriers installed. Pursuant to this guidance, worst-case predictive modeling was performed for the site. This modeling is described below in Section 4.0. Lastly, based on the modeling and survey data, EBI has produced a Compliance Plan for this site that outlines the recommended signage and barriers. The recommended Compliance Plan for this site is described in Section 5.0. 4.0 WORST-CASE PREDICTIVE MODELING In accordance with AT&T's RF Exposure policy, EBI performed theoretical modeling using RoofView® software to estimate the worst-case power density at the site ground -level resulting from operation of the antennas. RoofView® is a widely -used predictive modeling program that has been developed by Richard Tell Associates to predict both near field and far field RF power density values for roof -top and tower telecommunications sites produced by vertical collinear antennas that are typically used in the cellular, PCS, paging and other communications services. The models utilize several operational specifications for different types of antennas to produce a plot of spatially -averaged power densities that can be expressed as a percentage of the applicable exposure limit. For this report, EBI utilized antenna and power data provided by AT&T, and compared the resultant worst-case MPE levels to the FCC's occupational/controlled exposure limits outlined in OET Bulletin 65. The assumptions used in the modeling are based upon information provided by AT&T, and information gathered from other sources. There are no other wireless carriers. with. equipment installed at this site. SINAEBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 5 RF-EME Compliance Report USID No. 24152 Site No. CNU181 1 EBI Project No. 6210 151 1 26451 Ascension Drive, Los Altos Hills, California Based on worst-case predictive modeling, there are no modeled areas on any accessible ground -level walking/working surface related to the proposed AT&T antennas that exceed the FCC's occupational or general public exposure limits at this site. At the nearest walking/working surfaces to the AT&T antennas, the maximum power density generated by the AT&T antennas is approximately 13.00 percent of the FCC's general public limit (2.60 percent of the FCC's .occupational limit). The composite exposure level from all carriers on this site is approximately 13.00 percent of the FCC's general public limit (2.60 percent of the FCC's occupational limit) at the nearest walking/working surface to each antenna. The inputs used in the modeling are summarized in the RoofView® export file presented in Appendix C. A graphical representation of the RoofView@ modeling results is presented in Appendix D. It should be noted that RoofView is not suitable for modeling microwave dish antennas; however, these units are designed for point-to-point operations at the elevations of the installed equipment rather than ground level coverage. EBI 21 B Street 0 Burlington, MA 01803 # 1.800.786.2346 6 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62101511 26451 Ascension Drive, Los Altos Hills, California 5.0 RECOMMENDED SIGNAGE/COMPLIANCE PLAN Signs are the primary means for control of access to areas where RF exposure levels may potentially exceed the MPE. As presented in the AT&T guidance document, the signs must: ■ Be posted at a conspicuous point; ■ Be posted at the appropriate locations; ■ Be readily visible; and ■ Make the reader aware of the potential risksrp for to entering the affected area. The table below presents the signs that may be used for AT&T installations. f Informational Signs t INFO ^_ a n.5w�nw. INFO 2 r �1NFO. f2M!{TICTN �;. ' v 9K1iw4LLYUT w5 mi v,pf at&t INFO 3 1 I I � i. r INFO 4 Alerting Signs Y i i r NOTICE If.'onA'1'lua iPAnlrm,p. ( ' unLnx it fiv.aPaJe:.nw Capxcn ' �m no Nncvn..u�l CAUTION i CAUTION j ay'F=is;as [Cri(wpnxui�pr a� r- w.m... VIIAR , ING�' WARNING Ka�MwE�q n�.CL ;n t F.Yn..=.4J.M.+-v i- vnuluv�'tu4'+. Based upon protocols presented in AT&T's RF Exposure Policy guidance document, dated March 31, 2009, and additional guidance provided by AT&T, the following signage is recommended on the site: EBI 21 B Street 0 Burlington, MA 01803 4 1.800.786.2346 7 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62 10 151 1 26451 Ascension Drive, Los Altos Hills, California Recommended Signage: ■ Green INFO I sign posted at the base of the monopole ■ Yellow CAUTION sign posted at the base of the monopole No barriers are required for this site. Barriers may consist of rope, chain, fencing, or painted/taped stripes. The signage and any barriers are graphically represented in the Signage Plan presented in Appendix E. 6.0 SUMMARY AND CONCLUSIONS EBI has prepared this Radiofrequency Emissions Compliance Report for the proposed AT&T telecommunications equipment at the site located at 26451 Ascension Drive in Los Altos Hills, California. EBI has conducted theoretical modeling to estimate the worst-case power density from AT&T antennas to document potential MPE levels at this location and ensure that, site control measures are adequate to meet FCC and OSHA requirements, as well as AT&T's corporate RF safety policies. As presented in the preceding sections, based on worst-case predictive modeling, there are no modeled exposures on any accessible ground -level walking/working surface related to proposed equipment in the area that exceed the FCC's occupational and general public exposure limits at this' site. As such, the proposed AT&T project is in compliance with FCC rules and regulations. 7.0 LIMITATIONS This report was prepared for the use of AT&T Mobility, LLC. It was performed in accordance with generally accepted practices of other consultants undertaking similar studies at the same time and in the same locale under like circumstances. The conclusions provided by EBI are based solely on the information provided by the client. The observations in this report are valid on the date of the investigation. Any additional information that becomes available concerning the site should be provided to EBI so that our conclusions may be revised and Modified, if necessary. This report has been prepared. in accordance with Standard Conditions for Engagement and authorized proposal, both of which are integral parts of this report.. No other warranty, expressed or implied, is made. 0 EBT 21 B Street ® Burlington, MA 01803 0 1:800.786.2346 8 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 6210 151 1 26451 Ascension Drive, Los Altos Hills, California Appendix A Certifications EBI 21 B Street 0 Burlington, MA 01803 + 1.800.786.2346 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 6210151 1 26451 Ascension Drive, Los Altos, California Reviewed and Approved by: Senior Engineer Note that EBI's scope of work is limited to an evaluation of the Radio Frequency — Electromagnetic Energy (RF- EME) field generated by the antennas and broadcast equipment noted in this report. The engineering and design of the building and related structures, as well as the impact of the antennas and broadcast equipment on the structural integrity of the building, are specifically excluded from EBI's scope of work. EBI Consulting RF-EME Compliance Report EBI Project No. 62 10 151 1 Preparer Certification 1, Darrell Barrick, state that: USID No. 24152 Site No. CNU 1811 26451 Ascension Drive, Los Altos Hills, California ■ I am an employee of EnviroBusiness Inc. (d/b/a EBI Consulting), which provides RF-EME safety and compliance services to the wireless communications, industry. ■ I have successfully completed RF-EME safety training, and I am aware of the potential hazards from RF-EME and would be classified "occupational" under the FCC regulations. ■ I am familiar with the FCC rules and regulations as well as OSHA regulations both in general and as they apply to RF-EME exposure. ■ 1 have been trained in on the procedures outlined in AT&T's RF Exposure Policy guidance (dated 3/31/09) and on RF-EME modeling using RoofView® modeling software. ■ 1 have reviewed the data provided by the client and incorporated it into this Site Compliance Report such that the information contained in this report is true and accurate to the best of my knowledge. ='-- ESI 21 B Street 0 Burlington, MA 01803 4 1.800.786.2346 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62101511 26451 Ascension Drive, Los Altos Hills, California Appendix B Antenna Inventory I EBI 21 B Street 0 Burlington, MA 01803 0 1.800.786.2346 RF-EMECompliance Report EBI Project No. 62 101511 U0DNo 24|S2Site No. CNU|O|| Z646|Ascension Drive, Los Altos Hills, California eq ATT Al AT&T Panel UMTS 850 250 11.85 Kathrein 742 264 0 4.3 68 20 20 23.85 ATT M AT&T Panel UMTS1900 250 14.65 Kathrein 742 264 0 4.3 65 20 20 23.85 ATT Al AT&T Panel UMTS 1900 250 14.65 Kathrein 742 264 0 4.3 65 20 20 23.85 ATT A2 AT&T Panel GSM 850 Soo 12.85 Allgon 7920 0 4.3 75 23 20 23.85 ATT A2 AT&T Panel GSM1900 500 15.35 Allgon 7920 0 4.3 75 23 20 23.85 ATT A3 AT&T Panel LTE 700 314 12.35 Kathrein 800- 1 0764K 0 4.6 68 26 20 23.7 ATT A3 AT&T Panel LTE 1710 599 15.15 Kathrein 800-10764K 0 4.6 61 26 20 23.7 ATTCI AT&T Panel UMTS 850 250 11.85 Kathrein 742 264 120 4.3 68 25 19 23.85 ATTCI AT&T Panel UMTS1900 250 14.65 Kathrein 742 264 120 4.3 65 25 19 23.85 ATTCI AT&T Panel UMTS 1900 250 14.65 Kathrein 742 264 120 4.3 65 25 19 23.85 ATT C2 AT&T Panel GSM 850 Soo 12.85 AlIgon 7920 120 4.3 75 24 16 23.85 ATT C2 AT&T Panel GSM 1900 Soo 15.35 AlIgon 7920 120 4.3 75 24 16 23.85 ATT C3 AT&T Panel LTE 700 314 12.35 Kathrein 800-10764K 120 4.6 68 22 13 23.7 ATT 0 AT&T Panel LTE 1710 599 15.15 Kathrein 800-10764K 120 4.6 61 22 13 23.7 RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62101511 26451 Ascension Drive, Los Altos Hills, California Appendix C Roofview® Export File EBI 21 B Street 0 Burlington, MAO 1803 � 1.800.786.2346 Map, Settings, Antenna, and Symbol Data Table.. Exported from workbook -> Roofview 4.15.xls Done on 2/21/2011 at 12:43:12 PM. Use this format to prepare other data sets for the Roofview workbook file. You may use as many rows In this TOP header as you wish. The critical point are the cells in COLUMN ONE that read 'Start...' leg. StartMapDefinition) if used, these (4) headers are required to be spelled exactly, as one word leg. StartMapOefinition) The very next row will be considered the start of that data block. The first row of the data block can be a header (as shown below), but this is optional. When building a text file for import, Add the Map info first, then the Antenna data, followed by the symbol data. All rows above the first marker line'Start..' will be Ignored, no matter how many there are. This area is for you use for documentation. End of help comments. You can place as much text here as you wish as long as you don't place it below the Start Map Definition row below the blue line. You may insert more rows using the Insert menu. Should you need additional lines to document your project, simply insert additional rows by highlighting the row number adjacent to the blue line below and then clicking an the Insert menu and selecting rows. Roof Max YRoof Max XMap Max Y Map Max X Y Offset X Offset mber of An envelope 120 100 ISO 120 20 20 1 E$81:$DZ$2:$81:$DZ$200 r*�^;r ^-xaA� �t Qfiata Standard Method Uptime Scale Factor Low Thr Low Color Mid Thr Mid Color HI Thr Hi Color Over Calor Ap Ht Mult p Ht Method . 4 2 1 1 100 1 500 4 5000 2 3 1.5 1 teiina_f&Me to provide an ID (ant 1) for all antennas .(MHz) Trans Trans Coax Coax Other Input Calc (ft) (ft) ID Name Freq Power Count Len Type Loss Power Power Mfg Model X Y ATT Al UMTS 850 26.77835266 1 26.77835266 Kathrein 742264 20 20 ATT Al UMTS 1900 14.05347925 1 14.05347925 Kathrein 742264 20 20 ATT Al UMTS 1900 14.05347925 1 14.05347925 Kathrein 742264 20 20 ATT A2 GSM 850 10.6354008 4 42.54160319 Kathrein 742264 23 20 ATT A2 GSM 1900 5.980725379 4 23.92290151 Kathrein 742 264 23 20 ATT A3 LTE 700 30 1 30 Kathrein 800-10764K 26 20 ATT A3 LTE 1710 30 1 30 Kathrein 800-10764K 26 20 ATTCS UMTS 850 26.77835266 1 26.77835266 Kathrein 742264 25 19 ATT CS UMTS 1900 14.05347925 1 14.05347925 Kathrein 742264 25 19 ATT CI UMTS 1900 14.05347925 1 14.05347925 Kathrein 742 264 25 19 ATT C2 GSM 850 10.6354008 4 42.54160319 Kathrein 742 264 24 16 ATT C2 GSM 1900 5.980725379 4 23.92290151 Kathrein 742 264 24 16 ATT C3 LTE 700 30 1 30 Kathrein 800-10764K 22 13 ATTC3 LTE 1710 30 1 30 Kathrein 800-10764K 22 13 iWm6��ata Sym Wap Marke Roof X Roof Y Map Label notes for this table only) Sym 5 35 ACUnit mplesymbols Sym 14 5 Roof Access Sym 45 5 AC Unit Sym 45 20 Ladder . List Of Areas $AE$81:$DZ$200 (ft) (ft) dBd BWdth Uptime ON Z Type Aper Gain Pt Dir Profile flag 23.85 4.3 11.85 68;0 ON - 23.85 4.3 14.65 65;0 ON - 23.85 4.3 14.65 65;0 ON - 23.8S 4.3 12.85 75;0 ON - 23.85 4.3 15.35 75;0 ON - 23.7 4.6 12.35 68;0 ON - 23.7 4.6 15.15 61;0 ON - 23.85 4.3 11.85 68;120 ON - 23.85 4.3 14.65 65;120 ON - 23.85 4.3 14.65 65;120 ON - 23.85 4.3 12.85 75;120 ON - 23.85 4.3 15.35 75;120 ON - 23.7 4.6 12.35 68;120 ON - 233 4.6 15.15 61;120 ON- RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62101511 26451 Ascension Drive, Los Altos Hills, California Appendix D Roofview ® Graphics EB1 21 B Street 4 Burlington, MA 01803 � 1.800.786.2346 % of FCC Public Exposure Limit Exposure Level Z 5,000 F1 500 < Exposure Level <_ 5000 100 < Exposure Level <_ 500 trT R�f�' _ �' w �'a ""@� �' ¢ �,�'h�'sk.� .y�� •-CtF�yr�.i� 4 �"'i'"'sFTyu ro''LCx kik �,"C � "`r,. fit, f d ' Exposure Level <_ 100 ` �.'K .�y. a.�sw g. £`• r ``'r x� a�'^ r' -• �•r { * g 'dc ,.,�,d % *' I Y F .*� MR- V a # 5.1 i "� 's •-' x"� ,U",y t# 4 �->'3 "`r;i *'h 4z"• �. 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's S rob ,.�P£i:.. s � n, � t .. 1. •.-,�-.. x y,_,. 03 21 4 Roofview: Composite Exposure Levels Facility Operator: AT&T Mobility Site Name: Foothill Expy ATT Arta -ms AT&T Site Number: CNU 181 1 USID Number: 24152EBI Oftr Wier Arte rias Report Date: 08-18-11 C 0 N S 11 L T i n c % of FCC Public Exposure Limit Exposure Level >5 t Exposure Level <_ 5 '�`�' i �" "4' � a•.r- tB °t�t'sk 7`„sn' w k3 i k ,�, T � mss-+ �i`>�° k33ri, ,�s �'� y.7� f T� .� v ,ivi +b . �a 4i .'iiiM "'- k m'r' p ^n s -J ,Fs �� a�' a $ t � ✓� a��-*> .t �i ,,Tit. y�„�,�� 'n ar r �p� w3 ,ay?:r f:/�-b ,ct'si Y"+�,f<•y'r. TMr aa•�s F'Z . 21 am "m"' . w; � 'r X. r �„�" a 1� i ti a --W 'a �s m r r art �. ,�"#° s`"i ksx '+"5 tow -6- KJ f akin a*, sa a t k" Six` mac. ; x , s 9Y r k n 4FsX Iz,St�2 r 5+".4s"r ` d �.5ti k '+k`zrikfe r r"� wa5 is zi U.' .n'sr'tn K=wkb"t, �pr'x'd w R ,tz'�'. "¢t e � s t � i�,,�,+�� FPP,i, „{ x. �, �?'yi",..tya a'^y„ '�..c 'u 04 i ' x+5 }v� ia; f q � r",. ��k"'' '�"'�. `” >i.c.x.5",t�' k. h� +ia '-p t � c-3�wr^ r're 4`,�x Deka•` 0' 2' 4' 8' Roofview: AT&T Exposure Levels Facility Operator: AT&T Mobility Site Name: Foothill Expy Y'' AT&T Site Number: CNU 1811 �_" AT&T Arterms I�� EBI USID Number: 24152 EJ Other [�merArter s Report Date: 08-18-I I c0 Nsu i.'rIn RF-EME Compliance Report USID No. 24152 Site No. CNU 1811 EBI Project No. 62 10 151 1 26451 Ascension Drive, Los Altos Hills, California Appendix E Compliance/Signage Plan S EBI 21 B Street o Burlington, MA 01803 4 1.800.786.2346 y'rs AT&T Arte-Las ElOff-iar Cam er Arterms Sector A r' i CAUTION ��'"� �` Gy Lrwt�ra wwzs Sector C 01 2,s 418v Compliance/Signage Plan Facility Operator: AT&T Mobility Site Name: Foothill Expy AT&T Site Number: CNU 1811 USID Number: 24152 �Ik " EBI Report Date: 08-18-11 C 0 N S L' L V I N C: Sign Identification Legend =- Deno[�s AT&T lafon+ia Nonol Sig. G�enaccs TAT Inlorn,adonal Sign 2 G�ncstet AT&T In(arnuUonal Sipe 3 Gana[es AT&T Infornnanonal Sign a Ganotas ATYa r NOTICE Sign ut, Deno[ex AT&T CAUTION sign � �` Geno[+zs AT&T WARNING: $i�*n Attachment 4 at&t j j jf L 'Y L July 1, 2011 3-5 Year Plan for ATT Project The following is the 3-5 year plan for the AT&T project located at 26451Ascension Drive in the Town of Los Altos. Attachment A is a map of all existing sites in the Town of Los Altos Hills. The existing sites are identified by yellow pincushions. The nearest new proposed sites is south of the City in the general vicinity of the intersection. of Highway 280 at Mora Drive and Highway 280 at Magdalena Avenue. In addition, because of the :rapid pace that the wireless technology is evolving it is difficult to provide an accurate Antenna Master Plan. Furthermore, there are numerous other variables that effect the planning of the ATT wireless network. With that being said ATT Mobility will be proposing to modify the following facilities this year: 27299 Ascension Drive and 26379 West Freemont Blvd. The modifications will be similar in scope of what is being proposed with this application. These modifications will upgrade the network in this area to provide Long Term Evolution (LTE) technology. In simple terms, LTE technology is the next generation of wireless network which will provide significantly faster data to mobile devises. 3140 Gold Camp Drive, Suite 30 Rancho Cordova, CA 95670 MONOPOLE MONO PINE MONOPOLE COLOCATE MONOPOLE COLOCATE BLDG COLOCATE MONOPOLE MONOPOLE IXffl fLi1as] = COLOCATE BLDG UTILITY POLE UTILITY POLE i + LAT 37.3419 LONG - CN4019 10147301i I11-280/CROOKED CREEK TBD LOS ALTOS 94022,122092 proposed site _._-_...__ .-..__....__ _._..,_., _ _._._-_ .__...__—.___._-.-.___ I 1280/LOS ALTOS LOS ALTOS LAT 37.35 LONG CN-923 ^ p 10147303 GOLF CLUB 'TBD _ HILLS 94022122 104 _ proposed site �PURISSIMA HILLS CN3657 �{ 852301 10067475 WATER ARASTRADERO ROAD LOS ALTOS 9402237.38711-122.15303 on air 1-280 & ROBLEDA LAT: 37.365556 LONG: CN3659 51771 10067476 ROAD _ AWE LOS ALTOS — 2_6410 DUVAL WAY 27400 PURISSIMA LOS ALTOS 940221-122.135556 LAT 37 37556 (on air SF0095 132461 30095750 HILLS ROAD LOS ALTOS 94022 LONG 1221452.8 !on air { (AWE- DOWNTOWN ( LAT 37.3775 SF0131, ........ 13254' _ii_ 10095849 LOS ALTOS 280 SECOND STREET 6S ALTOS I 94022 LONG -122 11694 Ion air { 1 1721 WHITHAM 1 SF041013265; 10095751aAWE^LOS ALTOS 11 LOS ALTOS 94024137.3475/-122.09944 on air (AVENUE 1416 CRISTO REY SF0416 13268 10095752 AWE LOS ALTOS III DRIVE LOS ALTOS 94024137.3325/-122.07389 on air AWE - FOOTHILL 12345 EL MONTE LAT 37.36306 LONG - SF0479 132831 10095825 COLLEGE 1ROAD 1 LOS ALTOS 94022 122.125 Ion air -_.II-_ -- ._ --- E PAGE MILL i SF0525 132911 10095736 280 PAGE MILL ROAD, LOS ALTOS 94022(37.39/-422.1625 ion air ___J2350 AWE FOOTHILL 26451 ASCENSION ((LAT 37.38028 LONG - SF1811 24152 30095826( EXPRESSWAY DRIVE LOS ALTOS 94022]122.13111 on air Y (AWE -1280 / 380 MAGDALENA LAT 37.51083 LONG SF1820 1 24186E 100939751MAGDALENA (AVENUE LOS ALTOS I 940241121.97389 ion air I LOS ALTOS HILLS 26379 WEST FREMONT' SF2365 80685 10100717 TOWN HALL BOULEVARD LOS ALTOS 94022137.38432 /-122.13887 on air FOOTHILL I AWE-FOOTHILL AN D1 EXPRESSWAYAND LAT 37.35944 LONG SFE012 13350] 10097002 SPRINGER MAGDALENA AVENUE LOS ALTOS 94024 122.09472 Ion air AWE - FOOTHILL AND) j SFE016 13351 10097003 GRANT2055 GRANT ROAD !LOS ALTOS 94024 37.34194/-122.07194 Ion air E 'INTERSECTION OF I E37.36007 CN3707 j 85283 100674301 PG&E PORTLAND ROAD LOS ALTOS 94024 /-122.07773 on air EL MONTE ROAD & LAT.-3-7.-36-44 LONG: CN3665 1096951 10067434�SUMMERHILL 1040 BORDER ROAD (LOS ALT05 940241122.10443 ,proposed site AT&T Proprietary (Internal Use Only) Not for use or disclosure outside the AT&T companies except under written agreement MONOPOLE MONO PINE MONOPOLE COLOCATE MONOPOLE COLOCATE BLDG COLOCATE MONOPOLE MONOPOLE IXffl fLi1as] = COLOCATE BLDG UTILITY POLE UTILITY POLE Coverage Without The Proposed Site - CNU1811 February 25, 2011 Coverage With Proposed Site - CN U 18 i 1 at 26 ft February 25, 2011 Orr" y .r VVA� Y f - i7 �f"'�. •- � j _ t s. `ti . ''' its,: _'►- � , i xx.-.tit � , ;�r a" Z �i`'' JUR view from Anacapa Drive lookirg easr at site Attachment 6 TOWN OF LOS ALTOS HILLS LOSAL SIIiLLs 26379 Fremont Road Los Altos Hills, CA 94022 Phone: (650) 941-7222 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.