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HomeMy WebLinkAboutCD 2019-0004; TECHBILT WCF; RADIO FREQUENCY ELECTROMAGNETIC FIELDS EXPOSURE REPORT; 2018-12-19YOUR RF SAFETY PARTNER RADIO FREQUENCY ELECTROMAGNETIC FIELDS EXPOSURE REPORT RECEIVED f EB 13 2.0'19 f CARLSBAD ~~~~\NG o\V\S\ON Prepared for T-Mobile c/ o SAC Wireless Site Name: Site ID: Site Type: T echbilt Warehouse SD06377A Rooftop Located at: 2875 Loker Ave E Carlsbad, CA 92008 Latitude: 33.1321 / Longitude: -117.2487 Report Date: 12/19/2018 Report By: Jamie Santos Based on FCC Rules and Regulations, T-Mobile will be compliant provided Recommendations are implemented. Page 1/21 TABLE OF CONTENTS 1.0 EXECUTIVE SU~RY ................................................................................................................................ 3 2.0 SITE DESCRIPTION ........................................................................................................................................ 4 2.1 Site Map ............................................................................................................................................................. 4 2.2 Site Photographs -Existing Conditions ....................................................................................................... 5 2.3 Antenna Inventory ........................................................................................................................................... 7 3.0 ANALYSIS ........................................................................................................................................................... 8 3.1 Existing Conditions .......................................................................................................................................... 8 3.2 Emission Measurements -Existing Conditions ........................................................................................... 9 3.3 Emission Predictions -Proposed Conditions ........................................................................................... 11 3.4 Five Percent Contributions .......................................................................................................................... 13 4.0 CONCLUSION ................................................................................................................................................ 14 4.1 Results ............................................................................................................................................................. 14 4.2 Recommendation(s) ...................................................................................................................................... 14 4.3 Statement of Compliance ............................................................................................................................. 16 4.4 Engineer Certification ................................................................................................................................... 16 Appendix A: Background ........................................................................................................................................... 17 Appendix B: Measurement and/or Computer Simulation Methods ................................................................... 18 Appendix C: Limitations ............................................................................................................................................ 18 Appendix D: Antenna View® .................................................................................................................................... 19 Appendix E: T-Mobile RF Advisory Signs .............................................................................................................. 20 Appendix F: Equipment Certification ...................................................................................................................... 21 5850 Obcrli11 D1il'e. Ste. JOO A Se111 Diego. CA 92121 A 858. 792.0066 A 1111v111.dmhivm.cvm Page 2/21 1.0 EXECUTIVE SUMMARY Dtech Communications, LLC ("Dtech") has been retained by SAC Wireless, contractors to T-Mobile, to detennine whether its wireless communications facility complies with the Federal Communications Commission ("FCC") Radio Freguency ("RF") Safety Guidelines. TI-us report contains a computer- simulated and on-site, measurement analysis of the Electromagnetic Fields ("EMF") exposure resulting from the facility. The analysis also includes assessment of existing wireless carriers on site, where information is provided. The table below summarizes the results at a glance: Table 1: EMF Summary Access to antennas locked RF Sign(s)@ access point(s) Max proposed EMF simulated level for facili on Ground Max existing EMF measured level for facul on Ground Max proposed EMF simulated level for T-Mobile on Roof Max existing EMF measured level for T-Mobile on Roof .. ' .. .. .. , . ~ · .. ,:,Summary . Hatch Yes Caution (Existing) NOC & Guidelines ecommended Caution NA 6.5% General Population 0.3% General Population 1741.4% General Population (348.3% Occupational) awa from roof deck 1.4% General Population 0.3% Occu ational 5850 Oberlin Drive. Ste. 300 & San Diego. CA 92121 & 858.792.0066 & 11111,w.dted2rom.1WJ1 Page 3/21 2.0 SITE DESCRIPTION The wireless telecommunication facility is located on the ground. The facility consists of 1 wireless carrier(s) or operator(s): T-Mobile. The antennas are typically grouped into sectors pointing in different directions to achieve the desired areas of coverage. T-Mobile's antennas are facade-mounted on the parapet walls and are connected to the equipment via cables. 2.1 Site Map 5850 Oberlin Drive. Ste. JOO A S,111 Diego. C 1 92121 A 858.792.0066 A 11111,w.dtedxvm.mm Page 4/21 2.2 Site Photographs -Existing Conditions General site view T-Mobile Access H atch with Caution T-Mobile Sector A Hidden in Screens T-Mobile Sector A T-Mobile Sector B Hidden in Screens T-Mobile Sector B 5850 Oberlin o,;ve, Ste. 300 A Sa11 Diego. C/1 92121 A 858. 792.0066 A 111w111.d1echm111.m1n Page 5/21 T-Mobile Sector C Hidden in Screens T-Mobile Sector C 5850 Obtrlill Drive, Ste. 300 A S011 D1e11,o. (A 92121 A 858. ~92.0066 A 1nJJu1.dtedJl"OJJ1.com Page 6/21 2.3 Antenna Inventory Technical specifications in the table below are provided by our clients and/ or gathered from physical field surveys where applicable and/ or possible. Conservative estimates are used where information is not provided or available. Table 2: Proposed Site Technical Specifications Antenna Antenna GSM UMTS 10 Antenna Model Gain dBd Radk>a Radios A1 Ericsson AIR21 KRC11802~1_B2A_B4P Panel 15 15.4 1 -1.5 A1 T-Mobile Erics:son AIR21 KRC11802~1_B2A_B4P Panel 15 4.5 15.4 -1.5 A2 T-Mobile Ericsson AIR21 KRC11802~1_B2P _B4A Panel 2100 15 4.5 15.4 -1.5 A3 T-Mobile RFS APXVAARR18_ 43-U-NA20 Panel 700 15 12.8 -3.0 B1 T-MobHo Ericsson AIR21 KRC11802~1_B2A_B4P Panel 1900 125 65 4.5 15.4 437 23.5 -1.5 B1 T-Mobilo Eric88on AIR21 KRC11802~1_B2A_B4P Panel 1900 125 65 4.5 15.4 871 23.5 ·1.5 B2 T-Mobne Ericsson AIR21 KRC11802~1_B2P _B4A Panel 2100 125 65 4.5 15.4 1096 23.5 -15 B3 T-Mobilo RFS APXVAARR18_4~U-NA20 Panel 700 125 631 6 12.8 1910 22.0 -3.0 C1 T-Mobile Ericsson AIR21 KRC11802~1_B2A_B4P Panel 1900 265 65 4.5 15.4 437 23.5 -1.5 C1 T-Mobite Er1cason AIR21 KRC11802~1_B2A_B4P Panel 1900 265 65 4.5 15.4 871 23.5 -1.5 C2 T-Mobile Er1csson AIR21 KRC11802~1_82P _B4A Panel 2100 265 65 4.5 15.4 1096 23.5 -1.5 C3 T-Mobilo RFS APXVAARR18_4~U-NA20 Panel 700 265 631 6 12.8 1910 22.0 -3.0 5850 Obcrli11 on·ve. Ste. 300 A Sa11 Diego. CA 92121 A 858.792.0066 A IIIu1II1.dredM1n.co111 Page 7 /21 3.0 ANALYSIS 3.1 Existing Conditions Figure 1: Site Diagram -Plan (bird's rye) vie111 map of signs/ barriers mmnt(y existing on site. Site Diagram C T-Mobile 6 Grid lize s 10 ft 5850 Oberlin D1we. Ste. JOO & Sa11 Diego. 0-1 92121 & 858. '92.0066 & 111w1v.tlted1m111.co111 Page 8/21 3.2 Emission Measurements -Existing Conditions Field measurements were conducted at the subject site on 12/7/2018 2:00 PM by James McDaniel, Dtech personnel. Weather conditions can be best described as sunny, mild breeze. The spatial averaged values were recorded. Fig11re 2: Plan (bird's rye) view map of results compared to FCC's General Popttlation MPE (M.axim11m Permissible Exposure) Limits. All other Menu1'9111111ls wera<1% <1% C Grid lize • 10 ft RoofLaftl Measurement Diagram <1% Roofl.ftll A Roofl.ftll All other Masu,.,..nts went<1% AIIOlher M•sanments were<1% <1% 5850 Oberli11 Driue. Ste. ~00 & San Du;go. CA 92121 & 858.792.0066 & 111111111.dtech,vm.m,n <1% B Page 9/21 Figure 3: Plan (bird's rye) view map qf results compared to FCC's General Population MPE (M.axim111n Permissible Exposure) Limits. , Al other ........ man1:s •rw<1% C Q Roof level N Elevation:25' Qrld lize • 10 ft Measurement Diagram C1'11, C1'11, C1'11, lloofl.ewl AIIOlher llenlnnwnts ... e1-.c. C1'11, lloofl.ewl C1'11, 1 Dtech / COl'fYTMXicota>s S8S0 Oberlin /Jn·r'I!. Ste. JOO A Sa11 Diego. CA 92121 A 858.792.0066 .t. 1vm1J1.dte,;hcollupm a Page 10/21 3.3 Emission Predictions -Proposed Conditions Figure 4: Plan (bird's rye) view map of res11/ts compand to FCC's General Populatio11 MPE (M.axit11111J1 Pen11issible E:x.pomre) Limits. Grqy represents areas 1vhere exposure levels are calculated to be at or below 5%; Grem-behveeu 5% & 100% (belo1v MPE /i1JJits); b/ue,ye/10111 & red - greater than 100% (exceeds MPE limits). Individ11als ca11 safe!J occupy anas i11 grqy and gree11 for i11deji11ite amo1111t of time; 111hereas areas i11 blue, yellow & red 11111st be resl!icted lo RF tmi11ed perso1111el who has bem made f11l!J aivare of potential for exposure, has control and k11o}})s ho}}) to reduce their exposure 1vith the 11se of personal protection eq11ip111ent or has the abiliry lo power down the hc1nsv1itter.r. % of FCC General Publlc Exposure Limit D xss I ■ 5<Xs100 I ■ 1oo <xssoo ID SOO<Xss,ooo I ■ X>S,ooo r Ground Level N Elevation:O' Qridli1e•10ft Slmulatlon Diagram Max Sim Leyels T-Mobile: 8.5% 5850 Oberli11 Dnve. Ste. JOO • Sa11 Otef!.O. CA 92121 • 858.792.0066 • w1P1JJ.dtedkXJ11uom Page 11 /21 Figure 5: Plan (bird's rye) view map of reS11lts compared to FCC's General Population MPE (Maximum Permissible Exposure) Umits. Grqy represents areas where expos11re levels are calculated to be at or below 5%; Green-between 5% & 100% (/Jelow MPE limits); bl11e,yell01v & red -greater than 100% (exceeds MPE limits). lndivid11als can safe!J occupy areas in grqy and green for indefinite amount of time; whereas areas in blue, yellow & red must be restricted to RF trained personnel who has been made Jul!J a,vare of potential for exposure, has control and knows ho1JJ to reduce their exposure 1vith the use of personal protection equipment or has the abiliry to po1ver down the transmitters. % of FCC General Public Exposure Limit □ X s 5 I ■ 5 < X s 100 I ■ 100 < X s 500 I □ 500 < X s 5,000 I ■ X > 5,000 Glrtd llze • 10 fl Slmulatlon Diagram lloofL.8"11 T ~ Sim Levels ~bllo: 11,1.,% ,850 Oberlin D,ive. Ste. 300 • Sr111 Diego. CA 9212 I A 858. 792.0066 • 1v1v111.dre,-h.-0111.,vm Page 12/21 3.4 Five Percent Contributions Mitigation measures are a shared responsibility for carriers whose RF emission levels exceed five percent of the FCC's exposure limits in areas of non-compliance. Figure 6: Plan (bird's rye) view map of results compared to FCC's General Population MPE (Maxim11m Permissible Exposure) Umits. Grcry represents areas where exposure levels are calmlated to be at or be/0111 5%; Green -greater than 5%. % of FCC Gel'let'al Population Exposure Limit Ox.:s I ■x>s Simulation Diagram Roafl.nel Roofl.8"1 , Rooflevel N Elevation:25' Q1d llze • 10 ft 5850 Oberlin Drive. Sre. 300 A Sa11 Diego. CA 92121 A 858. -92,0066 A 111JvJJ1.dted1,y,JJuom Page 13/21 4.0 CONCLUSION 4.1 Results For a person standing in accessible areas on the ground, calculations and measurements for T -Mobile's existing site resulted in exposure levels below the FCC's most stringent General Population MPE Limits (see figure 2 & 4). For a person standing in accessible areas on the roof, measurements for T-Mobile's existing site resulted in exposure levels below the FCC's most stringent General Population MPE Limits (see figure 3). At roof elevation, the highest calculated exposure level is predicted to be above the FCC's General Population MPE Limits near the T-Mobile antenna(s) (see figure 5). Physical barriers are not feasible since the over-exposed areas are in the air, at or away from the roof edge. There are some RF advisory sign(s) already posted at path(s) to and/ or near the antennas to help establish awareness for exposure. There may be situations where workers i.e. landscape personnel, etc., may find themselves directly in front of the antennas. Individuals working near/in front of antennas must receive appropriate RF safety training1 and be made aware of the HotZones (areas where RF exposure may potentially exceed FCC safety limits). In addition, contact information should be made available in the event work is required within the HotZones. 4.2 Recommendation(s) The following compliance action(s) would be sufficient to meet the FCC's RF Safety Guidelines ( see figure 7): 1) Install NOC Sign(s) and GUIDELINES Sign(s) at antenna access points, gate entrances or climbing access points. 2) Install CAUTION Sign(s) on or near the back of all sectors. 1 Sec Appendix for Dtcch'~ RF Safety training program -1\ntcnnaVicw"' , l~~ 5850 Oberli11 D1i1'fl. Ste. }00 & Sa11 Di<2_0. G4 92121 & 858.792.0066 & 1vw1v.rlred1co1n.ro111 Page 14/21 Figure 7: Recommendation(s) -small sign icons represent existing signs; sign icons with red x sho11ld be removed and la,;ge sign icons should be installed. Raconmendatlon Diagram C Grid lize • 10 rt -------------------------------' • JJ2t.~~ 5850 Oberlin Driw. Ste. 300 A Sa11 Di~go. CA 92121 A 858.792.0066 A 111111111.rltechco111.ro1l/ Page 15/21 4.3 Statement of Compliance Based on the above results, analysis and recommendation(s), it is the undersigned's professional opinion that T-Mobile's site will be compliant with the FCC's RF Safety Guidelines provided recommendations are implemented. 4.4 Engineer Certification T his report has been prepared by or under the direction of the following Registered Professional E ngineer: Datang Tech, holding California registration number 16000. I have reviewed this report and believe it to be both true and accurate to the best of my knowledge. 5850 Oberlin D,fre. Ste. JOO .A. S"11 Di~~o. CA 92121 .A. 858.792.0066 .A. 1JJWm.dtechtv1n.mV1 Page 16/21 Appendix A: Background Dtech uses the FCC's guidelines described in detail in Office of Engineering & Technology, Bulletin No. 65 ("OET-65") "Evaluating Compliance with FCC G uidelines for Human Exposure to Radiofrequency Electromagnetic Fields". The table below summarizes the current Maximum Permissible Exposure ("MPE") safety limits classified into two groups: General population and Occupational. ~. '.Frequency (Mhz) 30 -300 300 -1500 1500 - 100,000 Table 3: FCC MPE Limits (from OET-65) .General Population/ Uncontrolle<:l ,l\1J.>E (mW/cm2) 0.2 Frequency (Mhz)/1500 0.2 -1.0 1.0 Averaging Time (minutes) 30 30 30 Occupational/ Controlled MPE (m\X'/cm2) 1.0 Frequency (Mhz)/300 1.0-5.0 5.0 Averaging Time (minutes) 6 6 6 General population/uncontrolled limits apply in situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment, and may not be fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore, members of the general public always fall under this category when exposure is not employment-related. Occupational/con trolled limits apply in situations in which persons are exposed as a consequence of their employment, and those persons have been made fully aware of the potential for exposure and can exercise control over their exposure. Occupational/ controlled 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 population/ uncontrolled limits, 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. It is important to understand that the FCC guidelines specify expos11re limits not emission limits. For a transmitting facility to be out of compliance with the FCC's RF safety guidelines an area or areas where levels exceed the MPE limits must, first of all, be in some way accessible to the public or to workers. When accessibility to an area where excessive levels is appropriately restricted, the facility or operation can certify that it complies with the FCC requirements. 5850 Ober/Ji, D1i1ie. Ste. 300 A Sa11 Diego. CA 92121 A 858. -92.0066 A 1vww.rlted){01J1,(()111 Page 17 /21 Appendix B: Measurement and/ or Computer Simulation Methods Spatial averaging measurement technique is used. An area between 2 and 6 feet, approximately the size of an average human, is scanned in single passes from top to bottom in multiple planes. When possible, measurements were made at very close proximity to the antennas and inside the main beam where most of the energy is emitted. The spatial averaged values were recorded. Dtech uses an industry standard power density prediction computer Modef to assess the worse-case, cumulative EMF impact of the surrounding areas of the subject site. The Model does not take into account losses due to buildings. Its methodologies are conservative enough to account for typical down-tilts deployed in wireless communications. In addition, the analysis is performed at 100% duty cycle-all transmitters are active at all times and transmitting at maximum power. For purposes of a cumulative study, nearby transmitters are included where possible. The result is a surrounding area map color-coded to percentages of the applicable FCC's MPE Limits. A res ult higher than 100% exceeds the Limits. Appendix C: Limitations The conclusions in this document rendered by Dtech are based solely upon the information collected during the site survey and/ or furnished by our Client which Dtech believes is accurate and correct. Dtech, however, has no responsibility should such Client provided information prove to be inaccurate or incorrect. Third party specification estimates used for cumulative computer simulation purposes, where applicable, are based on common industry practices and our best interpretation of available information. Data, results and conclusions in this document are valid as of its date. However, as mobile technologies continuously change, these data, results and conclusions may also be at variance with such future changes. Dtech has no responsibility to update its survey or report to account for such future technology changes. This document was prepared for the use of our Client only and cannot be utilized by any third party for any purpose without Dtech's written consent. Dtech shall have no liability for any unauthorized use of this document and any such unauthorized user shall defend, indemnify and hold Dtech and its owners, directors, officers and employees harmless from and against any liability, claim, demand, loss or expense (including reasonable attorney's fees) arising from such unauthorized use. 2 Roofview® Version 4.15, Richard TcU 1\ssociatcs, Inc.© 1996-2000 . • 7~£t2 5850 Oberlin D1ive. Ste. 300 "-Sa11 Diego, CA 92121 "-858.792.0066 "-11111m1.rltechc1111uot11 Page 18/21 Appendix D: Antenna View® Dtech Communica tions offers a unique, online tool (Antenna View®) to train, identify and inform individuals of site-specific HotZones -areas that may potentially exceed the FCC's Safety Limits. Antenna View® is an online, interactive training tool that will educate nontechnical people in about ten minutes. It is a site-specific, RF safety training program that requires the end user to sign an online agreement thereby limiting the liability to the landlord and carriers. Some of the advantages include: • Virtual walk-through in 3-D with corresponding photographs • Site-specific, interactive, simple to understand • D elivers pertinent information i.e. HotZones (areas that may potentially exceed FCC safety limits), site owners and contact numbers. • User online agreement = accountability We invite you to take a quick tour at www.AntennaView.com and see how easy to understand and informative Antenna View® is. Under Article 47 CFR § 1.1307(b), the FCC & OSHA mandates wireless operators/Jaciliry owners to have an RF s11rory completed including a sefery plan and training to ensure that their tenants, emplqyees and contractors 111ho work in or around RF sites are aware of the potential risks posed !!)I RF radiation. M ost cell sites are located on building rooftops where HV AC contractors, ivindow 111ashers, painters, ett: routine!J work and general!J do not kno111 what antennas even look like. Dtech Communications can help 111ith ongoing FCC/ OS HA compliance and provide practical training that is eary to understand !!)I atryone regardless qf their technical background 5850 Oberlin Dnve. Ste. JOO .A Sa11 Di~~o. CA 92121 .A 858. -<J2.0066 .A 1vwp1.dtedxom.com Page 19/21 Appendix E: T-Mobile RF Advisory Signs /¥\ NOTICE /~, GUIDELINES FOR WORKING IN RAOIOFREOUENCY ENVIRONMENTS • Ml p•somel 9tlol.id Nlve •ec:itrotnagnallo energy (EME)•.,.,..__..treining. • M p...,,.,.,.. erceril'IQ ths site must be Nhofii:ad obe,,-.,1potlledsf~ • ..._,,,_ -,1 ....,,,_. we .atlv•. Mor• ""'°'king on~-. notify owws and Cl•abl• approprial• ......... ♦ ~ mu-ilfM.lm 3fetlll ct••~ffom 1111 w,l..-n11• OonGl ~intrortd .,...,..,.. ♦ UN parsonlf •F morwtors wt.le WOfldng,.. -• _..,.. --•• tr1nt:mi1tw1 wffhcu lhi•cts Ntno narlNllope,abon ♦ Do nGt _.. ... MN ,ta;on .,...,._... 1n aquip,nent ,ooMt GUIDELINES Sign NOTICE {(~)) Rodlo fnlquency llolde beyond thhl point may u«-d the FCC -ral public ox-lft llmlt. ()My .................. .....,.. fof~lntadlo~r ---~----------#f-·--~ .. NOTICE Sign lleyandWapolnt: -!Nq--atthls.,_ exoeed lhe l'CC ,.,._ tor hUman expoauN. ::.:. ~-== ::::.::v ......,...cOUllll,...lnttnoettiapy. r ........ .,.,_.,.,....,.,. "'~•-• .... -,,_,.-...:•• !:lf'•l. WARNING Sign IN CASE OF EMERGENCY -CALL - 1-888-218-6664 UleNe: ........... : F NOC Sign ~CAUTION A 1 Beyond this point: Radio fnlquency llolds at lhhl site may uc:.d FCC rut.. for human expoeur11. --Fo,yow ..._,, __, .. ,..._ ..,.tfld ... _ ... _ .. _ j ·-----------\...._ __ .. c,ll, .... _-::=-_ CAUTION Sign 5850 Ober/i11 Dn·ve. Ste. JOO A Sa11 DilJ!,O. CA 92121 A 858. -92.0066 A 1JJ1JJ111.d1ub,rJ11uom Page 20/21 Appendix F: Equipment Certification -..Nt,r,Saklyln4~0...... •>1~~.._....,....,,_'(lt7N ~ f.)t-211 1100 FIJI H1 lJM1'1t ~-.......-L.JconlOOM ----Calibration Certificate Mtbl t.h4y , .. , ...... _..., .v .......... ,...,_. ...... , ... ~ .::.,,, ... D,i ~,.,_..Nrdll,.......,.....,... ,,..~ ... u,.-.......... ....... ...... , ~ .,.~ ~. tlO ,OOt 1,-.-~IOlllk-...«-'""l;,rlHI ................... II-O 10012 1 - C-0513 - ,._.. --c.-- ...... NY201M'II ~ ,_ ""'_..,.,... ___ .. ..._ __ ..... ...__ .... ___ .,. ____ ..,. __ c.....,-.- ... ~, ........ ................ ._....,,,111. "'-ISl-lJl-1700 ,a.U1.aJt.11'H .__ __ ---{b narda A ::,lw.ri-..... Calibration Certificate .... ..,.,, .. IOUIOl,i,..,_, ............. ,.,..... ........... ~Olltlt-.d-,, ..... ~•--•• ....... ~TN....._ ... ~OIA.-.S• ..... ....,~.,,__...,,..,. .. 110101)1 "" ......... ~..,.._ ............... ~110,0011-1 -...... , ----...... _ --n •A,"I; I(;• l't11"'l --~Arl_,...,.,.-.,,hU2 ,,..~, .... _.,, __J[JJJ._ --.. Ttllt.,._...,~IM,....,_ln.__..,.._~IOt-~fll•....,.. _..._MM....,_111..,_ll'orlrl ... 0...WflOl.«ilt~ 5850 Oberli11 Drive. Ste. 300 .A. Sa11 Di~go. C4 92121 .A. 858.792.0066 .A. w11111,.rltech,YJ111.co1n Page 21 /21