DIR-2021-025 - RF Report W
WATERFORD
Radio Frequency Emissions Compliance Report For AT&T Mobility
Site Name: Central Cupertino Relo CC2719 Site Structure Type: Monopole
Address: 10800 Torre Avenue Latitude: 37.319163
Cupertino, CA 95014 Longitude: -122.027929
Report Date: August 23, 2021 Project: Modification
Compliance Statement
Based on information provided by AT&T Mobility and predictive modeling, the Central Cupertino Relo CC2719
installation proposed by AT&T Mobility will be compliant with Radiofrequency Radiation Exposure Limits of 47
C.F.R. §§ 1.1307(b)(3) and 1.1310. RF alerting signage at the base of the Monopole and restricting access to
authorized climbers that have completed RF safety training is required for Occupational environment
compliance. The proposed operation will not expose members of the General Public to hazardous levels of
RF energy at ground level or in adjacent buildings.
Certification
I, David C. Cotton, Jr., am the reviewer and approver of
this report and am fully aware of and familiar with the
Rules and Regulations of both the Federal OFESS/o
Communications Commissions (FCC) and the pR�ES CO-0)
Occupational Safety and Health Administration (OSHA)
with regard to Human Exposure to Radio Frequency p m
Radiation, specifically in accordance with FCC's OET NO. 18838 David Charles Cotton,Jr.
Bulletin 65. 1 have reviewed this Radio Frequency Registered Professional Engineer(Electrical)
Exposure Assessment report and believe it to be both �FCTriXcP���P State of California, 18838
true and accurate to the best of my knowledge. FOFcauF° Date: 9021-Aug-
General Summary
The compliance framework is derived from the Federal Communications Commission (FCC) Rules and
Regulations for preventing human exposure in excess of the applicable Maximum Permissible Exposure
("MPE") limits. At any location at this site, the power density resulting from each transmitter may be expressed
as a percentage of the frequency-specific limits and added to determine if 100% of the exposure limit has been
exceeded. The FCC Rules define two tiers of permissible exposure differentiated by the situation in which the
exposure takes place and/or the status of the individuals who are subject to exposure. General Population /
Uncontrolled exposure limits apply to those situations in which persons may not be aware of the presence of
electromagnetic energy, where exposure is not employment-related, or where persons cannot exercise control
over their exposure. Occupational/Controlled exposure limits apply to situations in which persons are exposed
as a consequence of their employment, have been made fully aware of the potential for exposure, and can
exercise control over their exposure. Based on the criteria for these classifications, the FCC General
Population limit is considered to be a level that is safe for continuous exposure time. The FCC General
Population limit is 5 times more restrictive than the Occupational limits.
In situations where the predicted MPE exceeds the General Population threshold in an accessible area as a
result of emissions from multiple transmitters, FCC licensees that contribute greater than 5% of the aggregate
MPE share responsibility for mitigation.
Table 1: FCC Limits
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Central Cupertino Relo Cc2719 - Modification 08.23.2021
Limits for General Population/Uncontrolled Exposure Limits for Occupational/Controlled Exposure
Frequency Power Density Averaging Time Power Density Averaging Time
MHz mW/CM2 minutes mW/cm2 minutes
30-300 0.2 30 1 6
300-1500 f/1500 30 f/300 6
1500-100,000 1.0 30 5.0 6
f=Frequency(MHz)
Based on the computational guidelines set forth in FCC OET Bulletin 65, Waterford Consultants, LLC has
developed software to predict the overall Maximum Permissible Exposure possible at any location given the
spatial orientation and operating parameters of multiple RF sources. The power density in the Far Field of an
RF source is specified by OET-65 Equation 5 as follows:
S_ EIRPZ (mW/cm2)
4.7r•R
where EIRP is the Effective Radiated Power relative to an isotropic antenna and R is the distance between
the antenna and point of study. Additionally, consideration is given to the manufacturers' horizontal and
vertical antenna patterns as well as radiation reflection. At any location, the predicted power density in the
Far Field is the spatial average of points within a 0 to 6-foot vertical profile that a person would occupy. Near
field power density is based on OET-65 Equation 20 stated as
(180) 100 Pin 2
OBW
where Pin is the power input to the antenna, ABW is the horizontal pattern beamwidth and h is the aperture
length.
Some antennas employ beamforming technology where RF energy allocated to each customer device is
dynamically directed toward their location. In the analysis presented herein, predicted exposure levels are
based on all beams at full utilization (i.e. full power) simultaneously focused in any direction. As this condition
is unlikely to occur, the actual power density levels at ground and at adjacent structures are expected to be
less that the levels reported below. These theoretical results represent maximum-case predictions as all RF
emitters are assumed to be operating at 100% duty cycle.
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Central Cupertino Relo Cc2719 - Modification 08.23.2021
Analysis
AT&T Mobility proposes the following installation at this location:
INSTALL (3) AIR 6449 ANTENNAS. (1) PER SECTOR
The antennas will be mounted on a 75-foot Monopole with centerlines 52 feet above ground level. Proposed
antenna operating parameters are listed in Appendix A. Other appurtenances such as GPS antennas, RRUs
and hybrid cable below the antennas are not sources of RF emissions. Panel antennas have been installed
at this site by other wireless operators. Operating parameters for these antennas considered in this analysis
are also listed in Appendix A.
r � .
ROOFTOPS=35
Carrier Color Code
i
AT&T Mobility
Verizon
1
-• - � ' � - �'ri 50 foot grid size
•�- -.- ��;- •��` '. i yRODRIGUESAVE
• i
s:r .
R
• 1 `
GROUND LEVEL=O ROOFTOPS=20
ROOF=25_
lip
ROOF=15
414 AU
Figure 1: Antenna Locations
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Central Cupertino Relo Cc2719 - Modification 08.23.2021
Power density decreases significantly with distance from any antenna. The panel-type antennas to be
employed at this site are highly directional by design and the orientation in azimuth and mounting elevation,
as documented, serves to reduce the potential to exceed MPE limits at any location other than directly in front
of the antennas. For accessible areas at ground level, the maximum predicted power density level resulting
from all AT&T Mobility operations is 49.0704% of the FCC General Population limits. Based on the operating
parameters in Appendix A, the cumulative power density level at this location from all antennas is 49.2791%
of the FCC General Population limits. Incident at adjacent buildings depicted in Figure 1, the maximum
predicted power density level resulting from all AT&T Mobility operations is 57.9115% of the FCC General
Population limits. Based on the operating parameters in Appendix A, the cumulative power density level at
this location from all antennas is 58.4204% of the FCC General Population limits. The proposed operation will
not expose members of the General Public to hazardous levels of RF energy at ground level or in adjacent
buildings.
Waterford Consultants, LLC recommends posting RF alerting signage with contact information (Caution 2B) at
the base of the Monopole to inform authorized climbers of potential conditions near the antennas. These
recommendations are depicted in Figure 2.
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Compliance Requirement Diagram (Access Location)
Recommendations
caae coio code r�i
aT&TMod,l,ty AT&T Mobility Access
•Vi,r-, Location
,O foot 9,d size Caution 2B posted at the base
PoPoseds,9 of the tower
GROUND LEVEL-0 Materials
1 Caution 2B Sign
_ F -�
Ell EQ
pTT EQ
E7
L�
5 4
JIIIIIIIII 'a)
6 0
J a)7 2�
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®Notice 2 ®Caution 2 ®Warning 2
Figure 2: Mitigation Recommendations
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Central Cupertino Relo Cc2719 - Modification 08.23.2021
Appendix A: Operating Parameters Considered in this Analysis
Mech Mech Rad
Antenna Band Az DT H BW Length TPO Loss Gain ERP EIRP Center
#: Carrier: Manufacturer Pattern: (MHz): (deg): (deg): (deg): (ft): (W): Channels: (dB): (dBd): (W): (W): (ft):
1 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 80 2 67 6.1 40 2 0 12.21 1331 2183 52
1 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 850 80 2 66 6.1 40 2 0 12.43 1400 2297 52
1 AT&T COMMSCOPE SBNHH-1D65B 02DT 1900 80 2 66 6.1 40 4 0 15.87 6182 10142 52
2 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 700 80 2 68 6.1 40 2 0 12.26 1346 2208 52
2 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 850 80 2 64 6.1 40 2 0 12.62 1462 2399 52
2 AT&T COMMSCOPE SBNHH-1D65B 02DT 2100 80 2 63 6.1 40 4 0 16.5 7147 11725 52
3 AT&T ERICSSON SON_AIR6449 NR TB 3700 AT&T 3700 80 0 11 2.8 339 1 3 23.55 38477 63125 52
4 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 80 2 67 6.1 40 2 0 12.21 1331 2183 52
4 AT&T COMMSCOPE SBNHH-1D65B 02DT 2300 80 2 58 6.1 25 4 0 16.31 4276 7015 52
5 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 320 1 67 6.1 40 2 0 12.21 1331 2183 52
5 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 850 320 1 66 6.1 40 2 0 12.43 1400 2297 52
5 AT&T COMMSCOPE SBNHH-1D65B 02DT 1900 320 1 66 6.1 40 4 0 15.87 6182 10142 52
6 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 700 320 1 68 6.1 40 2 0 12.26 1346 2208 52
6 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 850 320 1 64 6.1 40 2 0 12.62 1462 2399 52
6 AT&T COMMSCOPE SBNHH-1D65B 02DT 2100 320 1 63 6.1 40 4 0 16.5 7147 11725 52
7 AT&T ERICSSON SON_AIR6449 NR TB 3700 AT&T 3700 320 0 11 2.8 339 1 6 23.55 19284 31637 52
8 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 320 1 67 6.1 40 2 0 12.21 1331 2183 52
8 AT&T COMMSCOPE SBNHH-1D65B 02DT 2300 320 1 58 6.1 25 4 0 16.31 4276 7015 52
9 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 200 0 67 6.1 40 2 0 12.21 1331 2183 52
9 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 850 200 0 66 6.1 40 2 0 12.43 1400 2297 52
9 AT&T COMMSCOPE SBNHH-1D65B 02DT 1900 200 0 66 6.1 40 4 0 15.87 6182 10142 52
10 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 700 200 0 68 6.1 40 2 0 12.26 1346 2208 52
10 AT&T COMMSCOPE SBNHH-1D65B-SR OODT 850 200 0 64 6.1 40 2 0 12.62 1462 2399 52
10 AT&T COMMSCOPE SBNHH-1D65B 02DT 2100 200 0 63 6.1 40 4 0 16.5 7147 11725 52
11 AT&T ERICSSON SON_AIR6449 NR TB 3700 AT&T 3700 200 0 11 2.8 339 1 0 23.55 76771 125950 52
12 AT&T COMMSCOPE SBNHH-1D65B-SR 05DT 700 200 0 67 6.1 40 2 0 12.21 1331 2183 52
12 AT&T COMMSCOPE SBNHH-1D65B 02DT 2300 200 0 58 6.1 25 4 0 16.31 4276 7015 52
13 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 30 0 68 6.1 40 2 0 12.34 1371 2250 66
13 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 30 0 66 6.1 40 2 0 12.63 1466 2405 66
13 Verizon COMMSCOPE SBNHH-1D65B 02DT 1900 30 0 66 6.1 40 4 0 15.87 6182 10142 66
14 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 30 0 68 6.1 40 2 0 12.34 1371 2250 66
14 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 30 0 66 6.1 40 2 0 12.63 1466 2405 66
14 Verizon COMMSCOPE SBNHH-1D65B 02DT 2100 30 0 63 6.1 40 4 0 16.5 7147 11725 66
15 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 150 0 68 6.1 40 2 0 12.34 1371 2250 66
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com
Central Cupertino Relo Cc2719 - Modification 08.23.2021
Mech Mech Rad
Antenna Band Az DT H BW Length TPO Loss Gain ERP EIRP Center
#: Carrier: Manufacturer Pattern: (MHz): de de de ft: W: Channels: (dB): dBd : W: W: (ft):
15 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 150 0 66 6.1 40 2 0 12.63 1466 2405 66
15 Verizon COMMSCOPE SBNHH-1D65B 02DT 1900 150 0 66 6.1 40 4 0 15.87 6182 10142 66
16 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 150 0 68 6.1 40 2 0 12.34 1371 2250 66
16 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 150 0 66 6.1 40 2 0 12.63 1466 2405 66
16 Verizon COMMSCOPE SBNHH-1D65B 02DT 2100 150 0 63 6.1 40 4 0 16.5 7147 11725 66
17 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 270 0 68 6.1 40 2 0 12.34 1371 2250 66
17 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 270 0 66 6.1 40 2 0 12.63 1466 2405 66
17 Verizon COMMSCOPE SBNHH-1D65B 02DT 1900 270 1 0 66 6.1 40 4 0 15.87 6182 10142 66
18 Verizon COMMSCOPE SBNHH-1D65B 02DT 700 270 0 68 6.1 40 2 0 12.34 1371 2250 66
18 Verizon COMMSCOPE SBNHH-1D65B 02DT 850 270 0 66 6.1 40 2 0 12.63 1466 2405 66
18 Verizon COMMSCOPE SBNHH-1D65B 02DT 2100 270 0 63 6.1 40 4 0 16.5 7147 11725 66
Notes: Table depicts recommended operating parameters for AT&T Mobility proposed operations.
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7430 New Technology Way,Suite 150 Frederick,Maryland 21703 (703)596-1022 Phone www.waterfordconsultants.com