HomeMy WebLinkAboutUP20-0002_RF_StudyCompliance Statement Based on information provided by Verizon Wireless and predictive modeling, the Chico Airport installation proposed by Verizon Wireless will be compliant with Radiofrequency Radiation Exposure Limits of 47 C.F.R. §§ 1.1307(b)(3) and 1.1310. The proposed operation will not expose members of the General Public to hazardous levels of RF energy and will not contribute to existing cumulative MPE levels on walkable surfaces
at ground or in adjacent buildings by 5% of the General Population limits. 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: Chico Airport Site Structure Type: Water Tank
Address: 13464 Browns Valley Drive Latitude: 39.79250833
Chico, CA 95023 Longitude: -121.84258333
Report Date: December 22, 2020 Project: New Build
Chico Airport - New Build 12.22.2020
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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:
𝑆𝑆= 𝐸𝐸𝐸𝐸𝐸𝐸𝐸𝐸4⋅𝜋𝜋⋅𝐸𝐸2 (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 𝑆𝑆=�180𝜃𝜃𝐵𝐵𝐵𝐵�⋅100 ⋅𝑃𝑃𝑖𝑖𝑖𝑖𝜋𝜋⋅𝑅𝑅⋅ℎ (mW/cm2)
where Pin is the power input to the antenna, θBW is the horizontal pattern beamwidth and h is the aperture length.
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.
Chico Airport - New Build 12.22.2020
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Analysis Verizon Wireless proposes the following installation at this location:
• (9) NEW VERIZON WIRELESS 8' HIGH PANEL ANTENNAS
• (9) NEW VERIZON WIRELESS RRHs The antennas will be mounted on a 82-foot Water Tank with centerlines 75 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 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 Verizon Wireless operations is 1.72% of the FCC General Population limits. Incident at adjacent buildings depicted in Figure 1, the maximum predicted power density level resulting from all Verizon Wireless operations is 2.1773% of the FCC General Population limits. The proposed operation will not expose members
of the General Public to hazardous levels of RF energy and will not contribute to existing cumulative MPE levels on walkable surfaces at ground or in adjacent buildings by 5% of the General Population limits.
Chico Airport - New Build 12.22.2020
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7430 New Technology Way, Suite 150 Frederick, Maryland 21703 (703) 596-1022 Phone www.waterfordconsultants.com
Waterford Consultants, LLC recommends posting contact information and RF Guidelines signage that informs personnel entering the site of basic precautions to be followed when working around antennas. These
recommendations are depicted in Figure 2. Any work activity in front of transmitting antennas should be coordinated with Verizon Wireless.
Figure 2: Mitigation Recommendations
Chico Airport - New Build 12.22.2020
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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 COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 150 0 65 8 40 4 0 13.4 3500 5743 75
2 Verizon COMMSCOPE NHH-65C-R2B 00DT < 6 GHz Licensed 150 0 62 8 40 4 0 13.53 3607 5917 75
2 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 150 0 66 8 40 4 0 15.72 5972 9798 75
3 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 150 0 62 8 40 4 0 16.29 6810 11172 75
4 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 240 0 65 8 40 4 0 13.4 3500 5743 75
5 Verizon COMMSCOPE NHH-65C-R2B 00DT < 6 GHz Licensed 240 0 62 8 40 4 0 13.53 3607 5917 75
5 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 240 0 66 8 40 4 0 15.72 5972 9798 75
6 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 240 0 62 8 40 4 0 16.29 6810 11172 75
7 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 330 0 65 8 40 4 0 13.4 3500 5743 75
8 Verizon COMMSCOPE NHH-65C-R2B 00DT < 6 GHz Licensed 330 0 62 8 40 4 0 13.53 3607 5917 75
8 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 330 0 66 8 40 4 0 15.72 5972 9798 75
9 Verizon COMMSCOPE NHH-65C-R2B 02DT < 6 GHz Licensed 330 0 62 8 40 4 0 16.29 6810 11172 75