EME_Report_AppleTA115GNCAP174466.09.18.2020signedCompliance Statement
Based on information provided by Verizon Wireless, field measurements and predictive modeling, the Apple
TA11 5G NCA-P-174466 installation by Verizon Wireless is compliant with Radiofrequency Radiation
Exposure Limits of 47 C.F.R. §§ 1.1307(b)(3) and 1.1310. On-site measurements collected by Verizon
Wireless contractors were found to be below 100% of the FCC General Population Maximum Permissible
Exposure (MPE) limits which is supportive of Waterford’s worst-case predictive analysis. Therefore, the
operations at this location will not expose members of the General Public to hazardous levels of RF energy at
ground level or in adjacent buildings.
Certification
I, David H. Kiser, am the reviewer and approver of this
report and am fully aware of and familiar with the Rules
and Regulations of both the Federal Communications
Commissions (FCC) and the Occupational Safety and
Health Administration (OSHA) with regard to Human
Exposure to Radio Frequency Radiation, specifically in
accordance with FCC’s OET Bulletin 65. I have
reviewed this Radio Frequency Exposure Assessment
report and believe it to be both true and accurate to the
best of my knowledge.
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.
Radio Frequency Emissions Compliance Report For Verizon Wireless
Site Name: Apple TA11 5G NCA-P-174466 Site Structure Type: Rooftop
Address: 18922 Forge Drive Latitude: 37.3351
Cupertino, CA 95014 Longitude: -122.00309722
Report Date: September 18, 2020 Project: Modification
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Table 1: FCC Limits
Frequency
(MHz)
Limits for General Population/ Uncontrolled Exposure Limits for Occupational/ Controlled Exposure
Power Density
(mW/cm2)
Averaging Time
(minutes)
Power Density
(mW/cm2)
Averaging Time
(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)
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.
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:
!= !"#$
%⋅'⋅#! (mW/cm()
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 ⋅1+,
2 ⋅3 ⋅ℎ (mW/cm()
where Pin is the power input to the antenna, qBW 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 worst-case predictions as all RF
emitters are assumed to be operating at 100% duty cycle.
For any area in excess of 100% General Population MPE, access controls with appropriate RF alerting signage
must be put in place and maintained to restrict access to authorized personnel. Signage must be posted to be
visible upon approach from any direction to provide notification of potential conditions within these areas.
Subject to other site security requirements, occupational personnel should be trained in RF safety and
equipped with personal protective equipment (e.g. RF personal monitor) designed for safe work in the vicinity
of RF emitters. Controls such as physical barriers to entry imposed by locked doors, hatches and ladders or
other access control mechanisms may be supplemented by alarms that alert the individual and notify site
management of a breach in access control. Waterford Consultants, LLC recommends that any work activity
in these designated areas or in front of any transmitting antennas be coordinated with all wireless tenants.
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Analysis
Verizon Wireless has installed the following at this location:
• The wireless telecommunication facility is located on a building rooftop. The antennas are façade-
mounted on the parapet walls and connected to the equipment via coaxial cables.
Antenna operating parameters are listed in Appendix A. Measurement results from the site survey are listed
in Appendix B. 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.
While the ERP for equipment controlled by another operator is not known, the contribution to existing RF levels
at this site by any existing operator is represented in the survey results. Operating parameters for these
antennas considered in this analysis are also listed in Appendix A.
Figure 1: Antenna Locations
Power density decreases significantly with distance from any antenna. The panel-type antennas 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.
As shown in Appendix B, measurements collected at accessible areas were found to be below the FCC
General Population limits. Verizon Wireless’ contractors used a broadband probe that provides cumulative
exposure readings that consider all RF Sources.
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
To account for activity at elevated work areas in front of the antennas, RF alerting signs have been posted as
depicted in Figure 2.
Any work activity in front of transmitting antennas should be coordinated with Verizon Wireless
Figure 2: Mitigation Measures
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Appendix A: Operating Parameters Considered in this Analysis
Antenna #: Carrier: Manufacturer Pattern: Band:
Mech
Az
(deg):
Mech
DT
(deg):
H BW
(deg):
Length
(ft):
TPO
(W): Channels:
Loss
(dB):
Gain
(dBd):
ERP
(W):
EIRP
(W):
Rad
Center
(ft):
1 Verizon ERICSSON SON_AIR5121 28GHz VZW 28000 285 0 10 0.9 1.3 1 0 21.85 195 320 19.2
2 Verizon ERICSSON SON_AIR5121 28GHz VZW 28000 165 0 10 0.9 1.3 1 0 21.85 195 320 19.2
3 AT&T ERICSSON SON_AIR5331_B260_TB_preliminary_V1.2 ATT 39000 265 0 4 2 1.2 1 0 26.89 610 1000 19.2
4 AT&T ERICSSON SON_AIR5331_B260_TB_preliminary_V1.2 ATT 39000 160 0 4 2 1.2 1 0 26.89 610 1000 19.2
5 T-Mobile ERICSSON SON_AIR5121 28GHz VZW 28000 285 0 10 0.9 1.3 1 0 21.85 195 320 19.2
6 T-Mobile ERICSSON SON_AIR5121 28GHz VZW 28000 165 0 10 0.9 1.3 1 0 21.85 195 320 19.2
Colocated antenna parameters based on industry standards
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Appendix B: Post Activation On-Site Measurements Summary (Dtech Communications, LLC)
Survey Date: 01/29/20
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com