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HomeMy WebLinkAbout7.UP25-0003 RF-EME Report 1 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Radio Frequency Electromagnetic Energy (RF- EME) Report Prepared for Verizon Wireless Site name: Verizon Wireless Site number: EBI site number: Address: Elsey 783409 052119-PR Coal Canyon Road, Butte Valley, CA, 95965 Latitude: Longitude: Structure Type: Report Writer: Original Report Date: 39.6189 -121.5897 Monopole Nathanial Boucher 15 May 2025 Prepared by EBI Consulting 2 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Table of Contents Executive summary........................................................................................................................ 3 1. Site Description ............................................................................................................... 4 2. Worst-Case Predictive Modeling ......................................................................................... 6 Compliance simulation software ......................................................................................... 6 Other Carrier Antennas ...................................................................................................... 6 Modeling Results ............................................................................................................... 6 3. Mitigation/Site Control Options .......................................................................................... 7 4. Summary and Conclusions .................................................................................................. 8 5. Limitations ........................................................................................................................ 9 Appendix A – Certifications .......................................................................................................... 10 Appendix B – Radio Frequency Electromagnetic Energy Safety Information and Signage Plans ........... 13 a. Site Mitigation Diagram (Signage/Barriers) ................................................................. 18 Appendix C – Federal Communications Commission (FCC) Requirements ......................................... 20 3 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Executive summary Purpose of Report EnviroBusiness Inc. (dba EBI Consulting) has been contracted by Verizon Wireless to conduct radio frequency electromagnetic (RF-EME) modeling for Verizon Wireless located at Site 783409 – Elsey, located at Coal Canyon Road, Butte Valley, CA, to determine RF-EME exposure levels from proposed Verizon telecommunications equipment at this site. As described in greater detail in Appendix C – Federal Communications Commission (FCC) Requirements of this report, the FCC has developed Maximum Permissible Exposure (MPE) Limits for the general population and for occupational activities. The FCC requires wireless system operators to perform an assessment of potential human exposure to RF fields emanating from all transmitting antennas at a site whenever antenna operations are added or modified, and to ensure compliance with the MPE limit in the FCC regulations. This report summarizes the results of RF-EME modeling in relation to relevant FCC RF-EME regulations/compliance standards This report describes modeling calculations of RF levels associated with the existing and proposed antennas. We have performed 3-dimensional modeling calculations to account for the effects of the antennas at all roof level(s) and at street level employing standard FCC mathematical models for calculating the effects of the antennas in a conservative manner. Therefore, our results provide worst-case RF levels to ensure the conclusions are conservative with regard to compliance with the FCC limit for safe continuous exposure. Statement of Compliance There are no other existing antenna carriers at the site to include in the compliance assessment. Note that FCC regulations require any future antenna collocators to assess and assure continuing compliance based on the cumulative effects of all then-proposed and then-existing antennas at the Site. As presented in the sections below, our conclusions are based on worst-case modeling calculations related to the existing and proposed antennas. At ground level, the maximum cumulative exposure level from Verizon Wireless at this Site is approximately 2.018 percent of the FCC’s general population limit (0.4036 percent of the FCC’s occupational limit). Notwithstanding, workers climbing/accessing the Monopole should be informed about the presence and locations of antennas and their associated fields. Due to the use of such conservative calculations for purposes of our analysis, it should be noted that the exposure levels actually caused by the antennas will likely be less significant than the calculated results herein. As the site is in compliance with applicable FCC limits as designed, there are no additional control measures required (See Section 3). Notwithstanding, it is also recommended that in connection with a lockout/tagout procedure, any non-Verizon Wireless worker/contractor who will be working on the «Site_Type» contact Verizon Wireless since only Verizon Wireless has the ability to lockout/tagout the Facility, or to authorize others to do so. 4 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com 1. Site Description This project site includes the following Verizon wireless telecommunication antennas on a Monopole located at Coal Canyon Road, Butte Valley, CA. Ant ID Sector Owner Antenna model Mech. Downtilt (°) Azimuth (°) Height (ft) Technology and Frequency (MHz) Elec. Tilt (°) HBW (°) Aperture (feet) Tx (#) Total Power Input (Watts)* Antenna Gain (dBd) Total ERP (Watts) VZW A1 A Verizo n NNSS-65B-HG-R2B 0 115 161 LTE 700 2 to 12 69 6.0 6 4 240 13.3 5 5190.52 VZW A1 A Verizon NNSS-65B-HG-R2B 0 115 161 LTE 850 2 to 12 67 6.06 4 240 13.45 5311.43 VZW A2 A Verizo n AIR 6419 B77D Envelope 0 115 163. 67 3.7GHz 0 104 .7 2.4 1 320 22.3 5 43666.6 6 VZW A3 A Verizo n AIR 3283 B25 B66 32 Ports Envelope 0 115 161 LTE 1900 2 121 .7 3.9 4 2 150 20.4 1 16485.0 9 VZW A3 A Verizon AIR 3283 B25 B66 32 Ports Envelope 0 115 161 LTE 2100 2 121.1 3.94 2 240 21.01 30283.86 VZW B1 B Verizon NNSS-65B-HG-R2B 0 235 161 LTE 700 2 to 12 69 6.06 4 240 13.35 5190.52 VZW B1 B Verizo n NNSS-65B-HG-R2B 0 235 161 LTE 850 2 to 12 67 6.0 6 4 240 13.4 5 5311.43 VZW B2 B Verizo n AIR 6419 B77D Envelope 0 235 163. 67 3.7GHz 0 104 .7 2.4 1 320 22.3 5 43666.6 6 VZW B3 B Verizon AIR 3283 B25 B66 32 Ports Envelope 0 235 161 LTE 1900 2 121.7 3.94 2 150 20.41 16485.09 VZW B3 B Verizo n AIR 3283 B25 B66 32 Ports Envelope 0 235 161 LTE 2100 2 121 .1 3.9 4 2 240 21.0 1 30283.8 6 VZW C1 C Verizo n NNSS-65B-HG-R2B 0 355 161 LTE 700 2 to 12 69 6.0 6 4 240 13.3 5 5190.52 VZW C1 C Verizon NNSS-65B-HG-R2B 0 355 161 LTE 850 2 to 12 67 6.06 4 240 13.45 5311.43 VZW C2 C Verizon AIR 6419 B77D Envelope 0 355 163.67 3.7GHz 0 104.7 2.4 1 320 22.35 43666.66 VZW C3 C Verizo n AIR 3283 B25 B66 32 Ports Envelope 0 355 161 LTE 1900 2 121 .7 3.9 4 2 150 20.4 1 16485.0 9 VZW C3 C Verizo n AIR 3283 B25 B66 32 Ports Envelope 0 355 161 LTE 2100 2 121 .1 3.9 4 2 240 21.0 1 30283.8 6 VZW M1 M Verizon 120cm Dish 0 115 161 18GHz 0 0 3.94 1 1 44.1 25703.96 *A duty cycle of 80% has been applied to all CBRS, mmWave and C-Band technologies. This is reflected in the total ERP. 5 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com The above tables contain an inventory of proposed Verizon Antennas and other carrier antennas if sufficient information was available to model them. Note that EBI uses an assumed set of antenna specifications and powers for unknown and other carrier antennas for modeling purposes. The FCC guidelines incorporate two separate tiers of exposure limits that are based upon occupational/controlled exposure limits (for workers) and general population/uncontrolled exposure limits for members of the general public that may be exposed to antenna fields. While access to this site is considered controlled, the analysis has considered exposures with respect to both controlled and uncontrolled limits as an untrained worker may access adjacent rooftop locations. Additional information regarding controlled/uncontrolled exposure limits is provided in Appendix C. Appendix B presents a site safety plan that provides a plan view of the Monopole with antenna locations. 6 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com 2. Worst-Case Predictive Modeling This section provides details of the installation that the compliance assessment is performed for. Information about the compliance calculation software utilized, predicted emission results and antenna safety setbacks are included. Compliance simulation software The IXUS electromagnetic field (EMF) calculation software was used to assess all the RF field levels presented in this study. IXUS (https://ixusapp.com/) is a software product of Alphawave Mobile Network Products (Pty) Ltd, who specialize in electromagnetic software and systems. The IXUS software uses a fast and accurate EMF calculation tool that allows for the determination of RF field strength in the vicinity of radio communication base stations and transmitters. At its core, the IXUS EMF calculation module implements field evaluation techniques detailed in the ITU-T K.61, CENELEC 50383, and IEC62232 specifications. The calculation of EMF results at any point in 3-D space is achieved by either a synthetic ray tracing technique, a conservative cylindrical envelope method, or through full-wave EM simulation results obtained from a computational electromagnetic software tool. The selection of the solution method is determined by the specific antenna being considered. In addition, a conservative and verified modelling technique for 5G beamforming antennas in IXUS is used. The simulation accuracy of the IXUS calculation module has been verified extensively with full-wave EM simulations. IXUS version number: 4.13 (0)2024.3.0 (Calculator: 2024.3). Compliance exposure standard: FCC OET 65. The parameters used for modeling are summarized in the Site Description antenna inventory table in Section 1. Other Carrier Antennas There are no other wireless carriers with equipment installed at this site. Modeling Results At ground level the maximum cumulative exposure level from Verizon Wireless at this Site is approximately 2.018 percent of the FCC’s general population limit (0.4036 percent of the FCC’s occupational limit). Notwithstanding, workers climbing the Monopole should be informed about the presence and locations of antennas and their associated fields. A site would be considered out of compliance with FCC regulations if there are areas that exceed the FCC exposure limits and there are no RF hazard mitigation measures in place. Any carrier which has an installation that contributes more than 5% of the applicable MPE must participate in mitigating these RF hazards. As the site is in compliance with applicable FCC limits as designed, and in accordance with the official Verizon Wireless Signage and Demarcation Policy for tower structures, no signage is recommended at this site. The inputs used in the modeling are summarized in the Site Description antenna inventory table in Section 1. Signage recommendations based on the IXUS™ modeling results are presented in Appendix B. 7 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com 3. Mitigation/Site Control Options EBI’s modeling indicates that there are no areas in front of the Verizon antennas that exceed the FCC standards for occupational or general public exposure. All exposures above the FCC’s safe limits require that individuals be elevated above the ground. In accordance with the official Verizon Wireless Signage and Demarcation Policy for tower structures, no signage is recommended at this site. Barriers are recommended for installation when possible to block access to the areas in front of the antennas that exceed the FCC general public and/or occupational limits. Barriers may consist of rope, chain, or fencing. Painted stripes should only be used as a last resort. There are no barriers recommended on this site. These protocols and recommended control measures have been summarized and included with a graphic representation of the antennas and associated signage and control areas in a RF-EME Site Safety Plan, which is included as Appendix B. Individuals and workers accessing the Monopole should be provided with a copy of the attached Site Safety Plan, made aware of the posted signage, and signify their understanding of the Site Safety Plan. To reduce the risk of exposure, EBI recommends that access to areas associated with the active antenna installation be restricted and secured where possible. All persons accessing elevated positions on adjacent structures (ex. rooftop, utility pole, monopole, etc.) along with nearby elevated features, such as trees, within areas exceeding the general public MPE, must be made aware of the presence and locations of antennas and their associated fields, where applicable. 8 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com 4. Summary and Conclusions EBI has prepared a Radiofrequency – Electromagnetic Energy (RF-EME) Compliance Report for telecommunications equipment installed by Verizon Wireless Site 783409 – Elsey, located at, Butte Valley, CA, 95965, to determine worst-case predicted RF-EME exposure levels from wireless communications equipment installed at this site. This report summarizes the results of RF-EME modeling in relation to relevant Federal Communications Commission (FCC) RF-EME compliance standards for limiting human exposure to RF-EME fields. As presented in the sections above, based on the FCC criteria, there are no modeled areas on any accessible roof level walking/working surface related to the Verizon antennas that exceed the FCC’s occupational or general public exposure limits at this site. Workers should be informed about the presence and locations of antennas and their associated fields. Recommended control measures are outlined in Appendix B – Radio Frequency Electromagnetic Energy Safety Information and Signage Plans; Verizon Wireless should also provide procedures to shut down and lockout/tagout this wireless equipment in accordance with their own standard operating protocol. Non- telecom workers who will be working in areas of exceedance are required to contact Verizon Wireless since only Verizon Wireless has the ability to lockout/tagout the facility, or to authorize others to do so. 9 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com 5. Limitations This report was prepared at the request of Verizon Wireless. It was performed in accordance with generally accepted practices of other consultants undertaking similar studies at the same time and in the same locale under like circumstances. The conclusions provided by EBI are based solely on the information «SVGen1» provided by the client. At the time of this report, no additional areas were identified on adjacent elevated surfaces that exceed the FCC’s general population MPE. The observations in this report are valid on the date of the investigation. Any additional information that becomes available concerning the Site should be provided to EBI so that our conclusions may be revised and modified, if necessary. This report has been prepared in accordance with Standard Conditions for Engagement and authorized proposal, both of which are integral parts of this report. No other warranty, expressed or implied, is made. 10 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Appendix A – Certifications 11 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com I, Nathanial Boucher, state that:  I am an employee of EnviroBusiness Inc. (d/b/a EBI Consulting), which provides RF-EME safety and compliance services to the wireless communications industry.  I have successfully completed RF-EME safety training, and I am aware of the potential hazards from RF-EME and would be classified “occupational” under the FCC regulations.  I 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.  I have reviewed the data provided by the client and incorporated it into this RF EME Report, such that the information contained in this report is true and accurate to the best of my knowledge. Signed: By: Nathanial Boucher 12 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Reviewed and Approved by: Michael McGuire Electrical Engineer mike@h2dc.com Note that EBI’s scope of work is limited to an evaluation of the Radio Frequency – Electromagnetic Energy (RF-EME) field generated by the antennas and broadcast equipment noted in this report. The engineering and design of the building and related structures, as well as the impact of the antennas and broadcast equipment on the structural integrity of the building, are specifically excluded from EBI’s scope of work. sealed 16may2025 13 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Appendix B – Radio Frequency Electromagnetic Energy Safety Information and Signage Plans 14 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Adjacent Poles and Lines (20 feet AGL) 15 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Ground Level (0 feet AGL) 16 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com South Elevation View 17 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com West Elevation View RF-EME Compliance Report Site No. 783409 EBI Project No. 052119-PRCA 18 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com a. Site Mitigation Diagram (Signage/Barriers) Sign Posting Instructions Required Signage / Mitigation Securely post at every point of access to the site in a manner conspicuous to all individuals entering thereon as indicated in the signage plan. Signage not Required. Securely post at every point of access to the site in a manner conspicuous to all individuals entering thereon as indicated in the signage plan. Signage not Required. Securely post in a manner conspicuous to all individuals entering thereon as indicated in the signage plan. Signage not Required. Securely post in a manner conspicuous to all individuals entering thereon as indicated in the signage plan. Signage not Required. Securely post in a manner conspicuous to all individuals entering thereon as indicated in the signage plan. Signage not Required. Signage Diagram Existing Sign Installed Sign Proposed Sign Signage not Required. RF-EME Compliance Report Site No. 783409 EBI Project No. 052119-PRCA 19 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com RF Signage and Safety Information RF Signage Areas or portions of any transmitter site may be susceptible to high power densities that could cause personnel exposures in excess of the FCC guidelines. These areas must be demarcated by conspicuously posted signage that identifies the potential exposure. Signage MUST be viewable regardless of the viewer’s position. GUIDELINES Category Two - Notice Category Three - Caution Category Four - Warning This sign will inform anyone of the basic precautions to follow when entering an area with transmitting radiofrequency equipment. This sign indicates that RF emissions may exceed the FCC General Population MPE limit.  Sign Color Blue  Sign Signal Word “Notice” This sign indicates that RF emissions may exceed the FCC Occupational MPE limit.  Sign Color Yellow  Sign Signal Word “Caution” This sign indicates that RF emissions may exceed at least 10x the FCC Occupational MPE limit.  Sign Color Orange for Warning  Sign Signal Word “Warning” Category One - Information Information signs are used as a means to provide contact information for any questions or concerns. They will include specific cell site identification information and the Verizon Wireless Network Operations Center phone number. ● Sign Color Green ● Sign Signal Word “Information” Physical Barriers Physical barriers are control measures that require awareness and participation of personnel. Physical barriers are employed as an additional administration control to complement RF signage and physically demarcate an area in which RF exposure levels may exceed the FCC General Population limit. Example: chain-connected stanchions Indicative Markers Indicative markers are visible control measures that require awareness and participation of personnel, as they cannot physically prevent someone from entering an area of potential concern. Indicative markers are employed as an additional administration control to complement RF signage and visually demarcate an area in which RF exposure levels may exceed the FCC General Population limit. Example: paint stripes Occupational Safety and Health Administration (OSHA) Requirements A formal adopter of FCC Standards, OSHA stipulates that those in the Occupational classification must complete training in the following: RF Safety, RF Awareness, and Utilization of Personal Protective Equipment. OSHA also provides options for Hazard Prevention and Control: Hazard Prevention Control • Utilization of good equipment • Enact control of hazard areas • Limit exposures • Employ medical surveillance and accident response • Employ Lockout/Tag out • Utilize personal alarms & protective clothing • Prevent access to hazardous locations • Develop or operate an administrative control program RF-EME Compliance Report Site No. 783409 EBI Project No. 052119-PRCA 20 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Appendix C – Federal Communications Commission (FCC) Requirements The FCC has established Maximum Permissible Exposure (MPE) limits for human exposure to Radiofrequency Electromagnetic (RF-EME) energy fields, based on exposure limits recommended by the National Council on Radiation Protection and Measurements (NCRP) and, over a wide range of frequencies, the exposure limits developed by the Institute of Electrical and Electronics Engineers, Inc. (IEEE) and adopted by the American National Standards Institute (ANSI) to replace the 1982 ANSI guidelines. Limits for localized absorption are based on recommendations of both ANSI/IEEE and NCRP. The FCC guidelines incorporate two separate tiers of exposure limits that are based upon occupational/controlled exposure limits (for workers) and general public/uncontrolled exposure limits for members of the general public. Occupational/controlled exposure limits apply to situations in which persons are exposed as a consequence of their employment and in which those persons who are exposed have been made fully aware of the potential for exposure and can exercise control over their exposure. Occupational/ controlled exposure 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 public/uncontrolled limits (see below), as long as the exposed person has been made fully aware of the potential for exposure and can exercise control over his or her exposure by leaving the area or by some other appropriate means. General public/uncontrolled exposure limits apply to situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment may not be made fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore, members of the general public would always be considered under this category when exposure is not employment-related, for example, in the case of a telecommunications tower that exposes persons in a nearby residential area. Table 1 and Figure 1 (below), which are included within the FCC’s OET Bulletin 65, summarize the MPE limits for RF emissions. These limits are designed to provide a substantial margin of safety. They vary by frequency to take into account the different types of equipment that may be in operation at a particular facility and are “time-averaged” limits to reflect different durations resulting from controlled and uncontrolled exposures. The FCC’s MPEs are measured in terms of power (mW) over a unit surface area (cm2). Known as the power density, the FCC has established an occupational MPE of 5 milliwatts per square centimeter (mW/cm2) and an uncontrolled MPE of 1 mW/cm2 for equipment operating in the 1900 MHz frequency range. These limits are considered protective of these populations. RF-EME Compliance Report Site No. 783409 EBI Project No. 052119-PRCA 21 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Table 1: Limits for Maximum Permissible Exposure (MPE) (A) Limits for Occupational/Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm2) Averaging Time [E]2, [H]2, or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f2)* 6 30-300 61.4 0.163 1.0 6 300-I,500 -- -- f/300 6 1,500-100,000 -- -- 5 6 (B) Limits for General Public/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm2) Averaging Time [E]2, [H]2, or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f2)* 30 30-300 27.5 0.073 0.2 30 300-I,500 -- -- f/1,500 30 1,500-100,000 -- -- 1.0 30 f = Frequency in (MHz) * Plane-wave equivalent power density Power Density (mW/cm2) RF-EME Compliance Report Site No. 783409 EBI Project No. 052119-PRCA 22 T: (781) 273-2500 E: info@ebiconsulting.com W: ebiconsulting.com Based on the above, the most restrictive thresholds for exposures of unlimited duration to RF energy for several personal wireless services are summarized below: Personal Wireless Service Approximate Frequency Occupational MPE Public MPE Microwave (Point-to-Point) 5,000 - 80,000 MHz 5.00 mW/cm2 1.00 mW/cm2 Broadband Radio (BRS) 2,600 MHz 5.00 mW/cm2 1.00 mW/cm2 Wireless Communication (WCS) 2,300 MHz 5.00 mW/cm2 1.00 mW/cm2 Advanced Wireless (AWS) 2,100 MHz 5.00 mW/cm2 1.00 mW/cm2 Personal Communication (PCS) 1,950 MHz 5.00 mW/cm2 1.00 mW/cm2 Cellular Telephone 870 MHz 2.90 mW/cm2 0.58 mW/cm2 Specialized Mobile Radio (SMR) 855 MHz 2.85 mW/cm2 0.57 mW/cm2 Long Term Evolution (LTE) 700 MHz 2.33 mW/cm2 0.47 mW/cm2 Most Restrictive Frequency Range 30-300 MHz 1.00 mW/cm2 0.20 mW/cm2 MPE limits are designed to provide a substantial margin of safety. These limits apply for continuous exposures and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health. Personal Communication (PCS) facilities used by wireless carriers in this area will potentially operate within a frequency range of 600 to 5000 MHz. Facilities typically consist of: 1) electronic transceivers (the radios or cabinets) connected to wired telephone lines; and 2) antennas that send the wireless signals created by the transceivers to be received by individual subscriber units (PCS telephones). Transceivers are typically connected to antennas by coaxial cables. Because of the short wavelength of PCS services, the antennas require line-of-site paths for good propagation, and are typically installed above ground level. Antennas are constructed to concentrate energy towards the horizon, with as little energy as possible scattered towards the ground or the sky. This design, combined with the low power of PCS facilities, generally results in no possibility for exposure to approach Maximum Permissible Exposure (MPE) levels, with the exception of areas directly in front of the antennas. FCC Compliance Requirement A site is considered out of compliance with FCC regulations if there are areas that exceed the FCC exposure limits and there are no RF hazard mitigation measures in place. Any carrier which has an installation that contributes more than 5% of the applicable MPE must participate in mitigating these RF hazards.