7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Compliance Statement
Based on information provided by AT&T Mobility and predictive modeling , the MISSION BLVD 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 Stealth Pole -Extrnl Array 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 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 fr om 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 ma y 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.
Radio Frequency Emissions Compliance Report for AT&T Mobility Site Name: MISSION BLVD Site Structure Type: Stealth Pole- Address: 43630 Mission Boulevard Latitude: 37.529752
Fremont, Ca 94539 Longitude: -121.915575
Report Date: April 13, 2023 Project: New Build
MISSION BLVD - New Build .04.13.2023
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)
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 =
𝐸𝐼𝑅𝑃
4⋅𝜋⋅𝑅2 (mW/cm2)
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
𝑆 = (180
𝜃𝐵𝑊
) ⋅ 100 ⋅ 𝑃𝑖𝑛
𝜋 ⋅ 𝑅 ⋅ ℎ (mW/cm2)
where Pin is the power input to the antenna, BW is the horizontal pattern beamw idth 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. This analysis includes a statistical factor reducing the actual power of the antenna system to 32% of maximum theoretical power to account for spatial distribution of users, network utilization, time division duplexing, and scheduling time. AT&T recommends the use of this factor based on a combination of guidance from its antenna system manufacturers, supporting international industry standards, industry publications, and its extensive experience.
MISSION BLVD - New Build .04.13.2023
7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com Analysis
AT&T Mobility proposes the following installation at this location:
• INSTALL (12) (N) ANTENNAS
• INSTALL (12) (N) RADIOS
The antennas will be mounted on a 80 -foot Stealth Pole-Ex with centerlines 69.12, 71, & 72.71 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. No other antennas are known to be operating in the vicinity of this site.
Figure 1: Antenna Locations
MISSION BLVD - New Build .04.13.2023
7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com 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 2.5482% of the FCC General Population limits. Incident at adjacent buildings depicted in Figure 1, the maximum pr edicted power density level resulting from all AT&T Mobility operations is 23.6998% 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 Stealth Pole-Ex to inform authorized climbers of potential conditions near the antennas. These recommendations are depicted in Figure 2.
7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Compliance Requirement Diagram (Access Location)
Recommendations
AT&T Mobility Access Location
Caution 2B sign posted at the base
of the pole.
Materials –
1 Caution 2B Sign
Figure 2: Mitigation Recommendation
MISSION BLVD - New Build .04.13.2023
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
(MHz):
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 AT&T QUINTEL QD6612-3D V1 02DT 700 50 0 70 6 40 4 0 12.0716 2578 4229 71 1 AT&T QUINTEL QD6612-3D V1 02DT 850 50 0 64 6 40 4 0 12.3679 2760 4528 71 1 AT&T QUINTEL QD6612-3D V1 00DT 1900 50 0 65 6 40 4 0 15.2398 5347 8772 71 1 AT&T QUINTEL QD6612-3D V1 00DT 2100 50 0 62 6 40 4 0 15.6713 5905 9688 71 2 AT&T Ericsson
SON_AIR6419 TB 05.17.22 3500
AT&T 3500 50 0 13 2.4 54.2 1 0 23.45 11999 19686 72.71
3 AT&T Ericsson
SON_AIR6449 NR TB 05.17.22
3700 AT&T 3700 50 0 11.7 2.8 86.8 1 0 23.45 19199 31497 69.12 4 AT&T QUINTEL QD6616-7 V1 02DT 700 50 0 66 6 40 2 0 11.9711 1260 2066 71 4 AT&T QUINTEL QD6616-7 V1 02DT 700 50 0 66 6 40 4 0 11.9711 2519 4133 71 5 AT&T QUINTEL QD6612-3D V1 02DT 700 300 0 70 6 40 4 0 12.0716 2578 4229 71 5 AT&T QUINTEL QD6612-3D V1 02DT 850 300 0 64 6 40 4 0 12.3679 2760 4528 71 5 AT&T QUINTEL QD6612-3D V1 00DT 1900 300 0 65 6 40 4 0 15.2398 5347 8772 71 5 AT&T QUINTEL QD6612-3D V1 00DT 2100 300 0 62 6 40 4 0 15.6713 5905 9688 71 6 AT&T Ericsson
SON_AIR6419 TB 05.17.22 3500
AT&T 3500 300 0 13 2.4 54.2 1 0 23.45 11999 19686 72.71 7 AT&T Ericsson
SON_AIR6449 NR TB 05.17.22
3700 AT&T 3700 300 0 11.7 2.8 86.8 1 0 23.45 19199 31497 69.12 8 AT&T QUINTEL QD6616-7 V1 02DT 700 300 0 66 6 40 2 0 11.9711 1260 2066 71 8 AT&T QUINTEL QD6616-7 V1 02DT 700 300 0 66 6 40 4 0 11.9711 2519 4133 71 9 AT&T QUINTEL QD6612-3D V1 02DT 700 160 0 70 6 40 4 0 12.0716 2578 4229 71 9 AT&T QUINTEL QD6612-3D V1 02DT 850 160 0 64 6 40 4 0 12.3679 2760 4528 71 9 AT&T QUINTEL QD6612-3D V1 00DT 1900 160 0 65 6 40 4 0 15.2398 5347 8772 71 9 AT&T QUINTEL QD6612-3D V1 00DT 2100 160 0 62 6 40 4 0 15.6713 5905 9688 71 10 AT&T Ericsson
SON_AIR6419 TB 05.17.22 3500
AT&T 3500 160 0 13 2.4 54.2 1 0 23.45 11999 19686 72.71 11 AT&T Ericsson
SON_AIR6449 NR TB 05.17.22
3700 AT&T 3700 160 0 11.7 2.8 86.8 1 0 23.45 19199 31497 69.12 12 AT&T QUINTEL QD6616-7 V1 02DT 700 160 0 66 6 40 2 0 11.9711 1260 2066 71 12 AT&T QUINTEL QD6616-7 V1 02DT 700 160 0 66 6 40 4 0 11.9711 2519 4133 71
Notes: Table depicts recommended operating parameters for AT&T Mobility proposed operations.