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RADIO FREQUENCY ELECTROMAGNETIC FIELDS EXPOSURE REPORT
Prepared for AT&T
c/o Caldwell Compliance
Site Name: �entral B�arlingasxge
Site ID: �:�I.O(i�GC
USID: 133(�0
FA ID: ��:7(,�9�5532
Site Type: �oc,�tc��
Located at:
1480 Burlingame Ave
Burlingame, CA 94010
Latitude: 37.5770 / Longitude: -122.3498
Report Date: 8;`G%2018
Report By: Ja�-r�ie Sautas
Based on FCC Rules and Regulations, AT&T Mobility will be compliant
provided recommendation(s) are implemented
Page1/16
TABLE OF CONTENTS
1.0
2.0
2.1
2.2
3.0
3.1
3.2
4.0
4.1
4.2
4.3
4.4
EXECUTNESUMM.ARY ................................................................................................................................3
SI'I'E DESCRIPTION ................................•-......................................................................................................4
SiteMap .............................................................................................................................................................4
AntennaInventory ...........................................................................................................................................5
ANALYSIS...........................................................................................................................................................6
EmissionPredictions .......................................................................................................................................6
FivePercent Contributions .............................................................................................................................9
CONCLUSION................................................................................................................................................ 10
Results............................................................................................................................................................. 10
Recommendation(s) ...................................................................................................................................... 11
Statementof Compliance ............................................................................................................................. 12
EngineerCertification ................................................................................................................................... 12
AppendixA: Background ........................................................................................................................................... 13
Appendix B: Measurement and/or Computer Simularion Methods ................................................................... 14
AppendixC: Limitarions ............................................................................................................................................ 14
Appendi� D: AntennaView� .................................................................................................................................... 15
AppendixE: AT&T RF advisory signs .................................................................................................................... 16
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1.0 EXECUTIVE SUMMARY
Dtech Communicarions, LLC ("Dtech") has been retained by Caldwell Compliance, contractors to AT&T,
to determine whether its wireless communicarions facility complies with the Federal Communications
Commission ("FCC") Radio Frequency ("RF") Safery Guidelines. This report contains a computer-
simulated analysis of the Electromagneric Fields ("EMF") exposure resulting from the facility. The analysis
also includes assessment of e�sting wireless carriers on site, where information is provided. The table
below summarizes the result at a glance:
Table 1: EMF Summary
Access Type_ .____.___..__.
__.---.-------...__.___ ..._____. _..
Access to antennas locked
�` RF Sign(s) @ access point(s)
_�_-----.�........__ ._..---._..__...__...._.... _..__...._.._..._......----___. ____�
� RF Si s antennas
�._____ _ .. _ _ �'�_ > L�_ _ _ ___ _ .___ __�
� Barrier s sectors
� ...----. _. _. _ _( � @. -
_. _____ _.__ ._.�.
Max EMF simulated level for
AT&T on Ground
_.....�_. ___. __..... __.._... __ __.......__..
` Max cumulative EMF simulated level for
facility on Ground
:---..... _._ _ _ __ _. _...___. _.._..
Ma�c EMF simulated level for
AT&T on Roof
__ _ ____ ___- -_ _._ _ __ _ _. ..._...
' Max cumulative EMF simulated level for
'; facility on Roof
i . .__ . . ..._.,_. . _.__ .... __. __ ___.._.._._._.
_.
�M� EMF simulated level for
_ AT&T Mobihty on Platform
Door
Yes
Notice #2 (Recommended)
Notice #2
- see Recommendations
4.0% General Population
4.0% General Population
236.0% General Population
��47.2% Occuparional
236.5% General Population
(47.3% Occupational
59.8% General Population
(11.96% Oceupational)
�
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2.0 SITE DESCRIPTION
The wireless telecommunication facility is located on a building rooftop. The facility consists of 3 wireless
carrier(s) or operator(s): AT&T Mobility, T-Mobile and Clearwire. The antennas are typically grouped into
sectors pointing in different direction to achieve the desired areas ot coverage. AT&T Mobility's antennas
are facade-mounted on the penthouse above the roof and connected to the equipment via cables.
2.1 Site Map
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3.0 ANALYSIS
3.1 Emission Predictions
Figure 1: Plan ((n'rd's eye) vie�v map of results compared to FCC'.r General Population MPE (Maxzmum Permi.ssible Exposure) Limits.
Gray repr�.rents ar�as wher� exposure levels ar� calculated to be at or below 5%; Green- betrveen 5% �' 100% (belo�v MPE limits); blzre,
yello2v �' rpd —greater than 100% (exceeds MPE IimitsJ. Individuals can safely occuj�y areas in gray and gr�en for indefinite amount of
time; �vher�as ar�as in blue, yelloav d�' red must be nstncted to RF trained personnel �vho has been made firlly au�are of potential for
e.�osu�, ha.r control and kttows hou� to r�duce tl�eir exposur� �vitl� tbe use of pers-onal protection eqztipment or I�as the ability to poaver
down the transmitters.
9�0 of FCC General Pubiic Exposure limit
� X s 5 ■ 5< X s i00 100 < X s 500 �� 500 < X s 5,000 '`� X> 5,�d
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Simulation Diagram
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N Elevation:�� ATS�T: A.0'!e � T-Mobile 6-• Omni �
_.._. ._ _ .
trid Size = 20 ft Cumulative: 4.0% ♦ DiSh 2
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Plattorm
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Figure 2: Playt (bird'.r eye� vie�v nzap of �z�.rult.r compared to FCC'.c Geyreral Populat,ion MPE (Maxzmum Permi.r.rible
Expo.rure) Limits. Gray repre.rents area.r svher� e,x�o.rure level� a� calcrslated to be at or beloaa� 5%; Green- betaveen 5% ��
100% (belo�v MPE limit.r); bl�se, yellosv � red —g�ater than � 00% (exceeds MPE li�nit,r). Individuals can safely occupy
area.r in gray andgree�z for indefinite amount of time; zvhereas area.r in blue, yelloav d� red must be r�.rtricted to KF trained
perfonnel avho ha.r been made fully aavare of potential for e.�o.ru�, ha,r contml and know.r ho2v to r�duce tbeir ex�io.rure zvith the
use ofper.ronal protection equipment or ba.r tbe ability to poaver do�vn the tran.rnaitter.r.
96 of FCC Geneval Pubiic Euposure Limit
� X< 5 � 5< X s 1 DO 100 � X s 500 �!� 500 < X 5 5,QQ0 � X� 5,000
;
Simulation Diagram
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/�Roof Level �= AT&T 12 �.- Cleanvire 3
_____.________ Max Sim Leveis
N� Eleva�lon:6$.6' ATB,T: 236.0°h � T-Mobile 6 ` Omni 2
C�id Size = 20 fl Cumulative: 236.5% ♦ DISh �
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Fig��re 3: Plan (bird � eye� �ie1v map of �e.rults compared to FCC �� General Population MPE (Maximum Permi.r.rible
Exposure� I�mit3. Gray represent.r area.r avhere expo3�ur� levels are calculated to be at or beloav S%; Gr�en- betaveen S% �'
100% (belozv MPE limit.r�; blue, yelloav �' red —greater than 100% (exceeds MPE Izmit,r�. Individual.r can .rafely occupy
areas in gray a�ad green for indefinite amount of time; zvbe�a.r area.r in bllse, yellosv e�' red mu,rt be re.rtricied to KF traiyred
per.ronnel avho ba.r been made fully azvay� of potential for e.xposure, ha,r control and knoaa�s hosv to r�duce their e.�o.rure svith the
u,re ofperronal protectzon equipment or has the ability to po�ver dozvn the tran.rmitters.
30 of FCC General Pubiic Exposure Limit
� X s 5 � 5< X s 1(id 1 QO � X s 50� j_`� 540 < X s 5,000 � X> 5,000
i
RooF Level
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Max Sim Levels
N� Elevation:70.2' ATBT at Antenna: 256.9°k � T-Mobile 6= Qmni 2
Gna Size = zo tt AT&T on Piatfortn: 59.8% ♦ Dish 2
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Simulation Diagram
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3.2 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 4: Plan (bird'.r eye� viesv map o, f re.rult.r compared to FCC'.r General Population MPE (Maximum Permissible
E.xj�o.ratre� I.imits. Gray �pre,rents area.r zvbe� ex�io.rure level.r a� calculated to be at or beloav S%; Gree�z —greaterthan 5%.
%of FCC General Pofwiation Exposure Limit
�� Xs5 ■ X>5
Simulation Diagram
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4.0 CONCLUSION
4.1 Results
For a person st�uiding� in accessiUle �ire�s on d�e ground and plattorm, c�llculzlrions for ���I'&1' �tobiliry's site
including contributions from existing carriers resulted in exposure levels below the FCC's most stringent
General Population MI'E Limits (see figure 2& 4).
For a person standing on the roof, the highest calculated exposure level is above the FCC's General
Population MPE Limits near the AT&T antennas (see figure 3).
There may be situations where workers i.e. window washers, painters, roofers, etc., may find themselves
directly in front of the antennas. Individuals entering the site or working near/in front of antennas must
receive appropriate RF safety trainingl 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 tlie HotZones.
Mitigarion measures for other carriers at this facility may be required but have not been determined as part
of this report.
1 See Appendix fox Dtech's RF Safety training program - AntennaViea-'�
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4.2 Recommendation(s)
The following compliance acrion(s) would be sufficient to meet t11e FCC's and AT&T's RF Safet�
Guidelines (see figure 5):
1) Install physical barriers at all sectots as shown below to demarcate the restricted areas.
2) Install NOTICE #2 Sign(s) on the perimeter of the barriers. The signs must be visible frotn an`�
direction prior to entering the restricted areas.
3) Remove all existing/old AT&T's RF advisory signs.
Figure 5: l�ecommendatio�a(.r�
ATBT Recorrmer�ation Diagram
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4.3 Staternent of Compliance
Based on the above results, analysis and recommendarion(s), it is the undersigned's professional opinion
that AT&T"s site including contriburions from exisring carriers will be compliant with the FCC's and
AT&T's RF Safety Guidelines provided recommendation(s) are implemented.
4.4 Engineer Certification
This report has been prepared by or under the direction of the following Registered Professional Engineer:
Darang Tech, holding California registrarion number 16000. I have reviewed this report and believe it to be
both true and accurate to tlie best of my knowledge.
�� jeyC�.
�/ Daran ec , P.E.
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' ` �B�OOGerlin Drir•e, Ste. 30�I ♦ Son Drego, CA 9?121 ♦�'�SJ9�.006/ ♦ n�1•u•.d�Qrixom.�,,,�: Ya�e 12�16
�
Appendix A: Background
Dtech uses the FCC's guidelines described in detail in Office of Engineering & Technology, Bulletin No. 65
("OET-65") "Evaluaring Compliance with FCC Guidelines 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 Occuparional.
Table 3: FCC MPE Limit�• �from OET-65)
30 - 300
300 - 1500
1500 -
100.000
0.2
Frequency (Mhz) / 1500
10.2 — 1.01
1.0
30
30
30
1.0
Frequency (Mhz)/300
(1.0 — 5.0)
5.0
r�
,
�
General population/uncontrolled limits apply in situations in which the general public may be e�posed 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. 'I'herefore, members of the general
public always fall under this category when exposure is not employment-related.
Occupational/controlled 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 potenrial
for exposure and can exercise cont�-ol 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 e.xpo.rure limits not emi.r.rion limits. For a
transmitring facility to be out of compliance with the FCC's RF safery guidelines an area or area.s where
levels exceed tlie MPE limits must, first of all, be in some way acce.rsible to the public or to workers. When
accessibility to an area where excessive levels is appropriately resrricted, the facility or operarion can certify
that it complies with the FCC requirements.
r
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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 mulriple planes. When possible,
measurements were made at very close pro�mity 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 predicrion computer Model' to assess the worse-case,
cumularive 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. ror purposes of a cumularive study,
nearby transmitters are included where possible. T'he result is a surrounding area map color-coded to
percentages of the applicable FCC's MI'E Limits. A result higher tlzan 100% exceeds the Limits.
Appendix C: Limitations
The conclusions in tlus document rendered by Dtech are based solely upon the information collected during
the site suroey and/or furnished by our Client which Dtech believes is accurate and correct. Dtech,
however, has no responsibility should such Client provided informarion prove to be inaccurate or
incorrect. Third paxty specification estimates used for cumulative computer simulation purposes, where
applicable, are based on common industry practices and our best interpretarion of available informarion.
Data., results and conclusions in this document are valid as of its date. However, as mobile technologies
conrinuously chan�e, these data, result� and conclusions may also be at variance with such future changes.
lltech has no responsibility to update it� survey or report to account for such future technolo�y 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 liabiliry for any unauthorized use of this
document and any such unauthorized user shall defend, indemnify and hold Dtech and its owners, director�,
officers and employees harmless from and a�ainst any liability, claim, demand, loss or expense (including
reasonable attorney's fees) arising from such unauthorized use.
Z RoofviewCai Veision 4.15, Richard Tell Associaees, Inc. � 1996-2000.
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,;;iC>OIe7G�f� Ditrr,S7e. ?UU ♦ 5,��i Uicao, C:✓� Y_'l?I ♦ ti�s.il�.�/U/(i ♦ rrt�n.�It�iu�nnarrm; �
Appendix D: AntennaViewOO
Dtech Communications offers a unique, online tool (AntennaViewOO ) to train, identify and inform
individuals of site-specific HotZones — areas that may potentially exceed the FCC's Safety Limits.
AntennaViewOO is an online, interacrive 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 limiring the liability to the landlord and carriers. Some of the advanta.ges include:
• Virtual walk-through in 3-D with corresponding photographs
• Site-specific, interactive, simple to understand
• Delivers perrinent information i.e. HotZones (areas that may potenrially e�ceed FCC safety limits), site
owners and contact numbers.
• User online agreement = accountability
- - ; �
We invite you to take a quick tour at •�.-�-.zv._�ntenna�'ie�=.r_,r�; and see how easy to understand and
informarive AntennaViewOO is.
tlnderArticle 47 CFK �' 9.1307(b), the FCC d�' OSHA mayadates svirele.rs operators/facil,ity ozvner.r to have an BF .rurvey
completed inclatding a safety plan and trairting to e�.rure that tl�ei; tenants, e,�loy�ee.r a;nd co�ztract�rs �vho u�crk itz a; arr�untl
KF' site.r a� asvare of tbe potential risk.r po.red by BF' radiation. Mo,rt cell .rites a� located on building ro �op.r zvhere HVAC
contractors, �a�indo�v sva.rher,r, painters, etc. routinely avork and generally do not knosv zvhat antenna.r even look Iz�ke. Dtech
Communication.r can be p with ongoing FCC/OSHA complzance and provide practical training tbat is eay to understand by
anyoyae regardle.rs of their tecbnical background.
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Appendix E: AT&T RF advisory signs
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i mMrc rsfi0 krqYtz� � hWt,Ml etalt
tlYl:tt Cre�ral ►pul�be E�rt tiieeb.
(eMe� �' idis6M+let wAM M �I! Rf
I 1erY�e�Nnl
�� Caelstlt:t n i0Di71�t'i idd hiae Teir
- N�w1AorM'xi�AutastleW�paE
r n�er; �Np Ub �il
��� � .....-._. _ o..,r.n,. •
Notice #2 Sign
_._.__ --_ __
. .
A CAUTItIH
L��`��
ATii apraW mM�ss at Mis site.
MJtl�IYt iiW yo11 DfE � Y NM
•Are eifM hyr� � tr� a� �rnsef
. rr FC6 Oa�aAirY fa�re I3sik
� f�Yti r�A9 Pdatikt Im ��wtiq M s IS
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Cw1atATiT tl ii7i1R2 aM Y�➢or MY
ie�rc� 1N�r ! �[leaty M! W�wR
N n�t �wi du AW.
- � �.., v.aeur • .
Caution #2 Sign (8" x 12")
Caution #2C Sign (5" x 7")
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f.'_.....:..�„_.:. -..._..-....
i'� o
i>"'.;_...� ..__._...-_...,.._...
1�.;.a. .........-.......»..r,.. �
Information Sign 1
(Discontinued)
`� �MR#1i��u
: Cs��l� .
ATBT ope+s:cs anlennas at �ar tbk.
N�d T�s �drl qae m enter�g m u!o
r�pe ratlio he�uencY tX� fx.las ciued tNe
FCC iktupat� Ecpawre timiSs.
:bstaq AT&` ai �6�63A-�. �GCrs 9 and 1
atfd maiaSE nss�stat�cE prxw k�at�knP
���
i�t to tai� uittr qaMle�r 1ge �rlcmq
h! iB � MYYdM0t�1 iQ�A /l51� J13i�S ppFJ.
• _ ._.._ ... . ... .:. . .. •
Warning #2 Sign
�,�,�l4UT��N
{�;,'�i
4o this tower:
F�iw he4xnc+ �RF: �Ies aear sz€. ustaax
a� euett L►r fii tksuFatxevt Emefuee i+�4s
(t9M1N!�U&TilB+'sJ-nJb-2522.r,�r!s-.^•4+td13.and �.
(o%rr tRcv ensce�ciaocs pmi !a i�rrfamirg
ma�denancet�reF+csUeraner�is9�+»t. �
Aee:ennrr ;tm��s4 nu> roaet :nav'� er trmeA +
Avwarksnqm�mnK-Mnem,�.sirx=g?�nmW :�
9F mn0.rt�"? �! a�:ritnq n+er ac;rse 3^lFs,n3: �
• ..�.._..�..., a»,Ru.. •
Caurion Sign 2B
Alternate for Towers
� ,�+�-Exw�su� �G.��
� �6�:ii*�fiti�?!t��
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�'�'k�t,�iA,'T`JaE
� SiF 3.� t::�11�1'� }a�F�EPf�SE
RYt��
::�:tTY�"�a et§M
'M' :+�k-.�. �-.s ^ r"n^:g» �OR
F XaY?a'FR!4�:�1!!k9'i:p4dt7l�
�53 +C=i� �..:'e l! S%Z
Information Sign 2
(Discontinued)
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