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RF Report ELNET Radio Frequency — Electromagnetic Energy (RF-EME) Compliance Report T-Mobile Existing Facility Site ID: SF44041A Address: 21090 Homestead Rd, Cupertino, CA, 94087 DATE: 02/20/2024 Ali r n - 41 ':i TABLE OF CONTENTS Contents 1.0 Executive Summary............................................................................................................................. 3 2.0 MPE Calculations ................................................................................................................................ 4 3.0 T-Mobile Antenna Inventory............................................................................................................. 14 4.0 FCC Rules and Regulations and Guidelines from OET 65 ................................................................. 15 5.0 Safety Recommendations...................................................................................................................... 17 6.0 FCC Limits................................................................................................................................................................... 18 7.0 Mitigation Diagram ................................................................................................................................................... 19 8.0 Summary.................................................................................................................................................................... 20 8.0 Engineering Certification........................................................................................................................................... 21 1 .0 Executive Summary Site ID SF44041A Site Name SBA: PG&E Stelling Sub Street Address 21090 Homestead Rd Latitude 37020'08.6"N City, State, Zip Cupertino, CA, 94087 Longitude 122002'37.1"W Site Type Lattice Tower Collocation Status ❑ Collocated ❑x Not Collocated Area Classification General Population Report Type Pre-Study Access Method Access Gate Report Review Gourav Soni Report Date 02/20/2024 Report Creation Javed Khan FCC & T-Mobile The proposed modification will be compliant upon implementing the recommendations in Compliance Status Section 7 T-Mobile has contracted with Telnet Inc. an experienced and independent Telecommunication Engineering Consulting firm, to determine whether site SF44041 A will be compliant with the rules and guidelines as defined by the Federal Communications Commission (FCC), OET Bulletin 65, regarding Maximum Permissible Exposure (MPE) to non-ionizing RF emissions for all individuals, classified in two groups, "Occupational or Controlled" and "General Public or Uncontrolled. The Antenna Inventory Table (Section 3) shows all transmitting antennas on the site. The use of"Unknown" for an operator means the information with regard to the carrier, their FCC license and / or antenna information was not available. Generic values used as estimation for antenna characteristics for unknown antennas. Z reference specifies the centerline of the antenna to the indicated level. In this report, it is assumed that all antennas are operating at full power at all times. Software modeling was performed for all transmitting antennas located on the site. Telnet Inc. has further assumed a 100% duty cycle and maximum radiated power for regular antennas and 75% duty cycle for AIR antennas . Obstructions (trees, buildings etc.) that would normally attenuate the signal are not taken into account. As a result, the predicted signal levels are more conservative (higher) than the actual signal levels will be from the measurement conclusions. The modeling software that Telnet Inc. used to create this report is Roofmaster. A result of over 100% does not make a site out of compliance with FCC guidelines. For predicted EME over 100% of the applicable FCC limit, further remediation (e.g. signage and/or barriers preventing access) is required to consider the site compliant. Areas exceeding the FCC limit are presented with the barriers and appropriate signages. Accessible areas outside the demarcated are the safety zones that have predicted EME values below the FCC's limits. Installation of the recommended mitigation or remediation measures brings the site into compliance. The predictions models antennas as if they are operating at full power, and this assumption yields a worst case scenario with more conservative results. On-site measurements may yield different results, as antennas do not always operate at full capacity. 3 Adj. Roof 2/Adj. Roof 5 Level Modeling with T-Mobile Transmitting Roof? I ��■■■■ ■' erCer'Ik1 LegendAdj. Adj. Roof — Utility Tow2 7 ■■Elk VI � 0 + 5 Adj.'. + ■■, 311 ❑ y5% . 1 00�% Roof 8 '- 1 ' � I U7J - 5UU Ad;. _ _ 1 Cable■■■■I 5 2 public �imi�� Roof 1 I ��1 Adj.Roof 2 '\ .,- Fence p ■' S ula 09 Adj.Roof 3. . I C. c ■ 0 utv Cycle Enabled I I 10 foot grit) size 19MM (Ayy- 11 to 17 Feet) B �■ Adj. � Max Value: 54.52% Roof4 Lattice JA■ Adj.Roof Tower AM■ ■ IMF ■ A■� C&FIef Color Code Adj.Roof9 � EF A■■1 ■■ ■i Ground " T'Mub� ■ �� ■ �20 ft� ■ . SMIV • Hotspot zone does not reach this area 5 Adj. Roof 7 Level Modeling with T-Mobile Transmitting A Percent M PE Legend Adj. Add � 4J■■■1MhbhL. I ❑ Roof 6 Roof 7 \Utilit _ ■■� �1 To er 00 Adj. Iy ��}}�jy�aa��rr ��yy��yy Roof I �■■■�� � 14JU�� �LJU Cable ■■■' ❑ 500 - 5000°� � 1 Cable � ���� � A 6 2 SEE' Public Limits Roof 5 I �� �■■■' Adj.Roof 2 '\ I Adj.Roof 3'� �■■■ I C utv Cycle Enabled I 10 foot gfid Ize I�Avo' 10 to 16 Feet) B 3 Adj. 4 MEN', Max Value: 63.60% Roo Lattice AMER Adj.Roof Tower ■■r AF qL I_ fl ■N' An N 0 m PF im rm Carrier Color Code- Adj.Roof 9 _ V■ -id E' 1JG r r d s� T-Mobile ow op r Adj, �20 ft--t- 6 Adj. Roof 8 Level Modeling with T-Mobile Transmitting ■■■ Percent f PE Legend Adj. Adj' Roof 6 Roof 7 ❑ To er ■■ERk, I No • oo y ��}}�jy�a�r ��yy��yy Roof 8 I R■■■� � I LJU�� �IJU Cable �■■■' ❑ 500 - 5000 5000 + 1 Cable ���� Public Limit Adj. 5 2 ■■■1 of 1 5 1 �� Adj.Roof 2 '\ � ■■� �I� �� Adj.Roof 3' I C utv Cycle Enabled I 10 foot grid Ize L_ . — _ . _ . — ■�� B (Avg. 9 to 15 Feet) ' 3 di' 4 ■ Max Value: 48.23% oof4 Lattice j. oof Tower N Adj.Roof 9 Carrier Color Code' i G r r d �W T-Mobile Adj.Roof —1-20 ft--J- ===pp- � 10 7 Adj. Roof 3 Level Modeling with T-Mobile Transmitting i J Percent M PE Legend Adj. Adl• . Roof 6 Roof 7 ❑ 0% _ 5 Utility Tower '+ Adj. y���}}��yy'a�� LJ0��yy��yy Roof 8 I 100 ' 500 Cable ' ❑ 500 - 5000% IMF 5000 + 1 Cable ��Adj. 6 Public Limits 2 Roof 1 5 1 �� Adj.Roof 2 '\ Fence ■■' I PAdL Roof 3' I C utv Cycle Enabled I 10 foot gfid Ize B (Avg: E to 14 Feet) 3 Adj, 4 Max Value: 0.72% Roof Lattice 4. dj.Roof Tower N Carrier Color Code Adj.Roof 9 d T-Mobile Adj.Roof �20 ft� 10 8 Utility Tower Level Modeling with T-Mobile Transmitting Percent M PE Legend Adj. Adj. Roof 6 Roof ❑ 0 _ 5 • tili To er RAdjJI oof 1 00 • 500 l 5000 + 16 1 Cabe Public Limits Roof 1 5 Ad'.Roof t 6 Fence Sula 08 ID utv Cycle Enabled l 10 foot grid Ize L — — — [Ayg- 75 to 81 Feet) Adj. 4 Max Value: 0.24% La Adj.Roof N Carrier Color Code Adj.Roof 9 Ground T-Mobile A .Roo -+-20 ft—#- 9 Cable I Level Modeling with T-Mobile Transmitting Percent M PE Legend Ad RdjAdj Roo 0 _ 5tili To er9 - 100 I 1 00 - 500 500 - 5000 0 5000 + 1 Cabe Public Limit Roof 1 5 INVU �YI A,� 22 p Ad'.Roof t FGnCG ula 09 I C ukv Cycle Enabled 10 foot grid Ize L_ . — • — — — (Avg: 72-33 to 78.33 Feet Adj. Max Value: 7.88% LCILULC dj.Roof N Carrier Color Code Adj.Roof 9 Ground T-Mobile A .Roo -1-20 ft--J- 10 Cable 2 Level Modeling with T-Mobile Transmitting Percent M PE Legend Ad RAdJ Roo 0° - 5 tili To er I 1 00 - 500 500 - 5000 10 5000 + 1 Cabe Roof 1 5 Public Limits �Y� � 2 Ad'.Roof 2 Fenceula 09 i C utv Cycle Enabled 0 foot grid Ize (Avg: 6 -33 to 68.33 Feet) 3 Adj. 4 Max Value: 6.18% La Adj.Roof T N Carrier Color Code Adj.Roof 9 Ground T-Mobile A .Roo �20 ft� II Cable 3 Level Modeling with T-Mobile Transmitting Percent MPE Legend Adj.Roof Roof? ( ■■■■■■'• Utility Tower �■■�■■' El1# a 1 - Adj.Roof 8 10 Y�} �y�yU I ' �ya� 5U� 5000 + 1 Ca1 F ble po� Public Limit Adj. 5 2 ■■1 Roof 1 j 5 I �� Ad.Roof 2 p �y kI [ ::]Adj.RI of 3 I�■■■1 r'utv Cyrrle Enabled I 110 foot gf1d �1ze _ —� _ (A 52.83 to 58.33 Feet) B 3 Adj' 4 Max Value: 16.29% oof 4 Lattice REIM dj.Roof Tower �OMNI E.EdL. I + . ■■■■rl N M M M M M F' Carrier Color Code Adj.Roof 9 .RA■■■■■I 0 u n d I� fi-I�+I�bile -��■ ■ �20 ft—* 12 Ground Level Modeling with T-Mobile Transmitting Percent M PE Legend Adj. 6 Roof ❑ 0% a 5 tili To er '''+� 9 - t 00 Roof 8 1 00ar • 500 _ 1 5000 1 Cabe Public Limits Roof 1 5 -LY] Ad'.Roof 2 6 Fence Sula 06 1 IDutv Cycle Enabled 10 foot grid Ize — t (Avg- 0 to 6 Feet) 3 Adj. 4 Latti IMI Max Value: 38.47% ce Adj.Roof Tower A Carrier Color Code Adj.Roof 9 r u d T-Mobile -+-20 ft- #- 13 3.0 T-Mobile Antenna Inventory Sector Antenna Number Operator Technology Antenna Make Antenna Model Azimuth(°) Height AGL A 1 TMO NR RFS APXVAALLI2N 43-U-NA20 30 92 A 1 TMO LTE RFS APXVAALLI2N 43-U-NA20 30 92 A 1 TMO LTE RFS APXVAALLI2N 43-U-NA20 30 92 A 1 TMO NR RFS APXI6DWV-16DWV-S-E-A20 30 92 A 1 TMO LTE RFS APXI6DWV-16DWV-S-E-A20 30 92 A 2 TMO NR Ericsson AIR6449 B41 30 41.83 A 2 TMO NR Ericsson AIR6449 B41 30 41.83 B 3 TMO NR RFS APXVAALLI2N 43-U-NA20 150 92 B 3 TMO LTE RFS APXVAALLI2N 43-U-NA20 150 92 B 3 TMO LTE RFS APXVAALLI2N 43-U-NA20 150 92 B 3 TMO NR RFS APXI6DWV-16DWV-S-E-A20 150 92 B 3 TMO LTE RFS APXI6DWV-16DWV-S-E-A20 150 92 B 4 TMO NR Ericsson AIR6449 B41 150 41.83 B 4 TMO NR Ericsson AIR6449 B41 150 41.83 C 5 TMO NR RFS APXVAALLI2N 43-U-NA20 290 92 C 5 TMO LTE RFS APXVAALLI2N 43-U-NA20 290 92 C 5 TMO LTE RFS APXVAALLI2N 43-U-NA20 290 92 C 5 TMO NR RFS APXI6DWV-16DWV-S-E-A20 290 92 C 5 TMO LTE RFS APXI6DWV-16DWV-S-E-A20 290 92 C 6 TMO NR Ericsson AIR6449 B41 290 41.83 C 6 TMO NR Ericsson AIR6449 B41 290 41.83 • 75%Duty Cycle is applied on AIR6449 B41 antenna in each sector 14 4.0 FCC Rules and Regulations and Guidelines from OET 65 When considering the contributions to field strength or power density from other RF sources, care should be taken to ensure that such variables as reflection and re-radiation are considered. In cases involving very complex sites predictions of RF fields may not be possible, and a measurement survey may be necessary The process for determining compliance for other situations can be similarly accomplished using the techniques described in this section and in Supplement A to this bulletin that deals with radio and television broadcast operations. However, as mentioned above, at very complex sites measurements may be necessary. In the simple example shown in the below diagram, it is desired to determine the power density at a given location X meters from the base of a tower on which are mounted two antennas. One antenna is a CMRS antenna with several channels, and the other is an FM broadcast antenna. The system parameters that must be known are the total ERP for each antenna and the operating frequencies (to determine which MPE limits apply).The heights above ground level for each antenna, H1 and H2, must be known in order to calculate the distances, R1and R2,from the antennas to the point of interest. is This summarizes the policies, guidelines and requirements that were adopted by the FCC on August 1, 1996, amending Part 1 of Title 47 of the Code of Federal Regulations,and further amended by action of the Commission on August 25, 1997 (see 47 CFR Sections 1.1307(b), 1.1310, 2.1091 and 2.1093, as amended from FCC "OET Bulletin 65"). Commission actions granting construction permits, licenses to transmit or renewals thereof, equipment authorizations or modifications in existing facilities, require the preparation of an Environmental Assessment (EA), as described in 47 CFR Section 1.1311, if the particular facility, operation or transmitter would cause human exposure to levels of radiofrequency (RF) electromagnetic fields in excess of these limits. For exact language, see the relevant FCC rule sections. The FCC-adopted limits for Maximum Permissible Exposure (MPE) are generally based on recommended exposure guidelines published by the National Council on Radiation Protection and Measurements (NCRP) in "Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields," NCRP Report No. 86, Sections 17.4.1, 17.4.1.1, 17.4.2 and 17.4.3. Copyright NCRP, 1986, Bethesda, Maryland 20814. In the frequency range from 100 MHz to 1500 MHz,exposure limits for field strength and power density are also generally based on the MPE limits found in Section 4.1 of, "IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz," ANSI/IEEE C95.1-1992, Copyright 1992 by the Institute of Electrical and Electronics Engineers, Inc., New York, New York 10017, and approved for use as an American National Standard by the American National Standards Institute (ANSI).The exposure guidelines are based on thresholds for known adverse effects and they incorporate a significant margin of safety.The federal health and safety agencies such as: the Environmental Protection Agency ("EPA"), the Food and Drug Administration ("FDA"),the National Institute on Occupational Safetyand Health("NIOSH")and the Occupational Safety and Health Administration ("OSHA") have also been actively involved in monitoring and investigating issues related to RF exposure. The formulas used in Roofmaster for calculating Power density is based on FCC "OET Bulletin 65", Section 2: PREDICTION METHODS,August 1997, Edition 97-01. Power density is converted to Maximum Permissible Exposure Limits(MPE Limits) based on Limits of General population/Uncontrolled Exposure and Limits of Occupational/Controlled Exposure presented in the following table generated from Appendix A of"OET Bulletin 65" Limits for Occupational/Controlled Exposure Frequency Averaging Time Range Power Density(S) z E 1 H 12,or S (mW/cmZ) � (MHz) (minutes) 300-1500 f/300 6 1500-100,000 5 6 Limits for General Population/Uncontrolled Exposure Frequency power Density(S) Averaging Time a Range E�Z, IH�Z,orS (MHz) (mW/cmz) (minutes) - 300-1500 f/1500 30 1500-100,000 1 30 f- Fr 16 5.0 Safety Recommendations 5.1.1 Occupational Safety and Health Administration (OSHA) Requirements OSHA requires that those in the Occupational classification must complete training in 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 • Employ Lockout/Tag out • Enact control of hazard areas • Utilize personal alarms & protective clothing • Limit exposures • Prevent access to hazardous locations • Employ medical surveillance and accident • Develop or operate an administrative control response program 5.1.2 RF Signage and Barriers RF signs and preventive barriers have an important role in appropriately alerting a worker before entering into a potential RF exposure area. All RF signs should be abided by at all times. IN CASE OF �� ,NOoaE ®,„ • ACAUTION EMERGENCY CALL �d 1-877-611-5868 .e as .a s.,.0 I - T••h[uhfle• •- T.Mobile ... .., L 1��Flobile- 1--.l[obile- 1�-Alabile NOC Guidelines Notice Caution Warning This sign indicates This sign will inform This sign indicates This sign indicates This sign indicates T-Mobile emergency anyone of the basic that transmitters that RF emissions that RF emissions call number along with precautions to follow operated by T- may exceed the may exceed the site Name and Number when entering an area Mobile are in full FCC General FCC General with transmitting compliance with Population or Population or radiofrequency FCC regulations Occupational MPE Occupational MPE equipment. limits limits Telnet, Inc. recommends coordinating with all wireless tenants before performing services in front of or near any transmitting antennas. During these activities, it may be appropriate to utilize Lockout/Tagout Procedures, "RF Exposure: Responsibilities, Procedures & Guidelines" for scheduled outages to eliminate RF hazards during these activities. 17 6.0 FCC Limits 6.1 Contribution to Co-Located areas Any wireless operator that contributes 5%or greater of the MPE limit in an area that is identified to be greater than 100% of the MPE limit is responsible taking corrective actions to bring the site into compliance. 6.2 Occupational limits Apply in situations in which persons are exposed as a consequence of their employment provided those persons are fully aware of the potential for exposure and can exercise control over their exposure. Limits for occupational/controlled exposure also apply in situations when an individual is transient through a location where occupational/controlled limits apply provided he or she is made aware of the potential for exposure. 6.3 General population limits Apply in situations in which the general public may be exposed, or in which persons that are exposed as a consequence of their employment may not be fully aware of the potential for exposure or cannot exercise control over their exposure. 6.4 Controlled Environment Applies to environments that are restricted or "controlled" in order to prevent access from members of the General Population classification. 6.5 Uncontrolled Environment Applies to environments that are unrestricted or"uncontrolled"that allow access from members of the General Population classification. 6.6 Generic Values The use of "Unknown" for an operator means the information with regard to the carrier, their FCC license and/or antenna information was not available. Generic values used as estimation for Effective Radiated Power(ERP) and antenna characteristics for unknown antenna. 18 7.0 Mitigation Diagram Access Gate Install Notice,NOC and Guidelines signs Utility Tower Ad'. Roof I Sector A Ad Roof 8 sector c I Cable Adj. Roof 1 I Cable 5 1 /� /, 2 Adj. Roof 2 III/ Fence Adj. R.of 3 I I B 3 Adj. 4 Roof4 Lattice Sector B Adj. Roof E Tower Adj. Roof 9 ra Ground Carrier Color Code T __77] —rl ♦20 ft—+- 19 8.0 Summary All calculations performed for this analysis yielded results that were not within the allowable limits for exposure to RF Emissions and the site will be compliant by implementing the recommended mitigation. There are No collocated carriers on the site. A result of over 100% does not make a site out of compliance with FCC guidelines. For predicted EME over 100% of the applicable FCC limit, further remediation (e.g. signage and/or barriers preventing access) is required to consider the site compliant. Areas exceeding the FCC limit are demarcated with barriers and appropriate signage. Accessible areas outside the demarcated safety zones have predicted EME below the FCC limits. Installation of the recommended mitigation or remediation measures brings the site into compliance.The engineering models antennas as if they are operating at full power except for T-Mobile AIR antennas, and this assumption yields more conservative results (higher predicted EME). On-site measurements may yield different results, as antennas do not always operate at full capacity The anticipated maximum contribution from each sector of the proposed T-Mobile facility on the ground is 38.7%of the FCC general public limit.This was determined through calculations along a radial from each sector taking power values into account as well as actual vertical plane antenna gain values per the manufacturer-supplied specifications for gain. Based on worst-case predictive modeling, there are no areas at ground level related to the proposed antennas that exceed the FCC's occupational or general public exposure limits at this site. At ground level, the maximum power density generated by the antennas is approximately 0.039 mW/cm2 of the FCC's general public limit. 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. For this facility, the calculated values were above the allowable 100% threshold standard per the federal government which will be controlled by engineering methods. Modeling indicates that there are areas on the walking/working surfaces at the rooftop level in front of the T-Mobile antennas that may exceed the FCC standards for general population and/or occupational exposure.To reduce the risk of exposure and/or injury,Preparer recommends that access to the rooftop or areas associated with the active antenna installation be restricted and secured where possible. In order to alert any workers potentially accessing the site, a blue Notice sign, white NOC and yellow Guidelines signs are recommended for installation at the site's access. 20 8.0 Engineering Certification I Kenneth D Gilbert, P.E. State: The stamp and signature on this page certify the following: • 1 am a Registered Professional Engineer in the state of California, license # E20159 expiration date 12/3 1/2024. • 1 am familiar with the Rules and Regulations of the Federal Communications Commission (FCC) as well as the regulations of the Occupational Safety and Health Administration (OSHA), both in general and specifically as they apply to the FCC Guidelines for Human Exposure to Radio- frequency Radiation. • 1 reviewed the RFE-EME Compliance Report for the T-Mobile site. Site Name SBA: PG&E Stelling Sub Site ID SF44041A Street 21090 Homestead Rd Address Cupertino, CA, 94087 and based on supplied data and to the best of my knowledge I believe the Report to be true and accurate. c )c m E20159 OF CA Kenneth D Gilbert, P.E., PMP Date: 02/20/2024 Registered Professional Engineer California License # E20159 21