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Home My WebLink AboutMCUP 08-22; SPRINT SD36XC281 GRAND PACIFIC; RADIO FREQUENCY ELECTROMAGNETIC FIELDS EXPOSURE REPORT; 2008-12-29(.0\1MI ~ICAflO'.S, 11 ( 11526 Sorrento Valley Road, Ste. F San Diego, CA 92121 Phone/Fax: 866.988.0066 www.dtechco111.com RADIO FREQUENCY ELECTROMAGNETIC FIELDS EXPOSURE REPORT Prepared For Sprint'>. ToptllorwllhNEXTtl Site: CA6998_SD36XC281, Pacific Grand Palisades Located at: 5805 Armada Drive Carlsbad, CA 92008 Latitude: 33.1239 / Longitude: -117.3152 12/29/2008 ------------------ Page 1/13 EXECUTIVE SUMMARY Dtech Communications, LLC ("Dtech") has been retained by Sprint Nextel to determine whether their communication facility complies with the Federal Communications Commission ("FCC") Radio Frequency ("RF") Safety Guidelines. This report contains an on-site, measurement analysis of the Electromagnetic Fields ("EMF") exposure resulting from the cell site. The table below summarizes the result at a glance. Site ID/Num Access to Antennas Locked RF Si n s) @Access Points) RF Si n s /Barriers @Antennas Max El\iF Level on roof, near S rint Nextel Antennas Max EMF Level on Ground FCC Com liance Status Table 1: EMF Summary C.:\6998_SD36X C28 l Yes Notice Notice 15.2%OC (76.0% GP) 0.45%GP Yes ----------------~----- BACKGROUND The engineering staff at Dtech does not establish the guidelines used to ensure safety exposure levels emitted from RF electromagnetic fields associated with wireless communication, radio and television equipment. Dtech. uses the FCC's guidelines described in detail in Office of Engineering & Technology, Bulletin No. 65 ("OET-65") "Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Radiation". Table 2 below summarizes the current Maximum Permissible Exposure ("MPE") safety limits classified into two groups: General population and Occupational. 11526 Sorrento Vaflry Road, Ste. F .& San Diego, CA 92121 .& 866.988.0066 .& www.dtec!)f'om com Page 2/13 ---------•-----·------- Table 2: FCC MPE Umits (from OET-65) Frequency General Occupational/ Controlled (l\Ihz) population/Uncontrolled MPE MPE (m\\;'/cm2) (m\'\'/cm2) 30-300 .2 1.0 300-1 500 Frequency (Mhz)/1500 Frequency (Mhz)/300 (0.2 -1.0) (1.0 -5.0) 1500-100,000 1.0 5.0 General population/uncontrolled limits apply in situations in which the general public may be exposed or in which persons who are exposed as a consequence of their employment, and may not be fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore, members of the general public always fall under this category when exposure is not employment-related. Occupational/controlled limits apply in situations in which persons are exposed as a consequence of their employment, and those persons have been made fully aware of the potential for exposure and can exercise control over their exposure. Occupational/ controlled 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 population/uncontrolled limits, 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. It is important to understand that the FCC guidelines specify exposure limits not emission limits. Therefore, in order for a transmitting facility or operation to be out of compliance with the FCC's RF guidelines an area or areas where levels exceed the MPE limits must, first of all, be in some way accessible to the public or to workers. When accessibility to an area where excessive levels is appropriately restricted, the facility or operation can certify that it complies with the FCC requirements. 11526 Somnto Valley Road, Ste. F • San Diego, CA 92121 • 866.988.0066 • www.dtechco,11 (OfJ1 Page 3/13 ------- SITE DESCRIPTION The subject telecommunication site is located at 5805 Armada Drive, Carlsbad, CA 92008. Sprint Nextel's site consists of an equipment building located within the building and 12 antennas total. The antennas are mounted inside the parapet walls on the main roof and connected to the equipment via coaxial cables. Table 3: Site technical specifications Num of sectors N um of Antenna per sector Antenna Radiation Center Height Above Ground/Roof feet Antenna Type SN-iDEN850 3 3, 3, 2 39/ NA (all sectors) 4' panel (all sectors) SN-CDMA1900 3 1, 1, 2 39/NA ( all sectors) RR45-19-04DPL4 ( all sectors) 11526 Somnlo Vallry Road, Ste. F .._ Sa11 Diego, CA 92121 .._ 866.988.0066 .._ www.dtechcom.rom Page 4/13 Figure 1: Site map 11526 Somnto VaUry Road, Ste.F A San Diego, CA 92121 A 866.988.0066 A www.dtechi:om com Page 5/13 Dte5}i> Figure 2: Site Diagram Site ID: CA6998_5D36XC ·1 N me: PACIFIC GRAND P Sprint Sector C 150• 11526 Somnto Valley Road, Ste. F • San Diego, CA 92121 • 866.988.0066 • www.dtechcom com Page 6/13 Figure 3: Site photographs Sprint-Nextel General site view Sprint-Nextel Access point (locked) Sprint-Nextel Access sign(s) Sprint-Nextel Sector A (CDM.A)(left) & Sector B Sprint-Nextel Sector C (CDMA) Sprint-Nextel Sector A (iDEN) 11526 Somnto VaUry Road, Ste.F A San Diego, CA 92121 ..t. 866.988.0066 ..t. www.dtechcom.com Page 7/13 Sprint-Nextel Sector B (iDEN) Sprint-Nextel Equipment (CDMA) Sprint-Nextel Sector A (iDEN)Qeft) & Sector A (CDMA)(right Sprint-Nextel Sector C (iDEN) 11526 Somnto Valley Road, Ste.F A San Diego, G4 92121 A 866.988.0066 A www dtechcom com Page 8/13 FIELD MEASUREMENT Field measurements were conducted at the subject site on 12/5/2008 3:00 PM by Jeff Bales, Dtech Field E ngineer. The Narda meter, model NBM-550 with EA 5091 Probe was used to conduct the measurements. This device is designed to measure frequencies between 300kHz and 50Ghz, well within the SMR, Cellular, and PCS frequency ranges (most major wireless operators). Therefore, the result measured is a cumulative RF energy resulting from all transmitters within the frequency ranges of the probe. The probe itself is frequency shaped and can automatically weigh each field contributions based on frequency. The output is given in percentages of the FCC's MPE Limits. A result higher than 100% is out of compliance. As recommended in Safety Code 6, spatial averaging measurement technique was used. An area between 2 and 6 feet, approximately the size of an average human, is scanned in single passes from top to bottom in multiple planes. When possible, measurements were made at very close proximity to the antennae and inside the main beam where most of the energy is emitted. The maximum levels (max-hold) were recorded. 11526 Sorrento Va!lry Road, Ste. F • San Diego, CA 92121 • 866.988.0066 • wwwdtechcom com Page 9/13 Field M easurement Result Below are the locations where measurements were conducted and their respective recorded levels given in percentages of the applicable FCC's MPE Limits. Again, a result higher than 100% is out of compliance. Figure 4: Result Diagram Green< " Blue<f20°o Yellow Red=>'100% of_the applicable FCC MPE Limits. Site ID: CA6998_SD36XC281 Site Name: PACIFIC GRAND PALISADES Sprint Sector C 150' Nextel SectorC 190° Sprint Sector B 90' On the main roof, the highest exposure level was measured at 15.2% of the applicable FCC's Occupational MPE Limits (76.0% General Population) near Sprint Nextel's antennas. On the ground, the highest was measured at 0.45% of the General Population MPE Limits. 11526 Somnto Vall'!Y Road, Ste. F A San Diego, C4 92121 • 866.988.0066 A w1vw.dtechrnm com Page 10/13 RECOMMENDATION(S) On-site measurements at Sprint Nextel's site resulted in exposure levels below the applicable FCC's MPE Limits. There are appropriate RF advisory signs posted at the roof access point(s) and/ or near the antennas to establish awareness for potential RF exposure. Further actions are not required. CONCLUSION Based on the above results, analysis and recommendation(s), it is the undersigned's professional opinion that Sprint Nextel's site complies with the FCC's RF Safety Guidelines. The worse-case exposure levels in publicly accessible areas are measured to be well below the FCC's General Population MPE Limits. 11526 Sorrento Vallry Road, Ste.F A San Diego, CA 92121 A 866.988.0066 A www.dtechmm com Page 11/13 -------·--------- CERTIFICATION This report has been prepared by or under the direction of the following Registered Professional Engineer: Darang Tech, holding California registration number 16000, with renewal date of 06/30/09. 11526 Somnto Valley Road, Ste. F & Sa,, Diego, CA 92121 & 866.988.0066 & www.dteclµ:om com Page 12/13 ------------ Appendix A: References [1] Guidelines far Evaluating the Environmental Effects of Radio frequency Radiation, Second Memorandum Opinion and Order, ET Docket 93-62, adopted August 25, 1997. [2] Guidelines far E valuating the Environmental Effects of Radio frequency Radiation, Report and Order, ET Docket 93-62, FCC 96-326, adopted August 1, 1996. Federal Register 41006 (1996). [3] Guidelines far E valuating the Environmental Effects of Radio frequency Radiation, Notice of Proposed Rulemaking. ET Docket 93-62, 8 FCC Red 2849 (1993). [4] The Telecommunication Act of 1996, 47 U.S.C. Section 332 (c)(7)(B)(iv). [5] www.fcc.gov/Bureaus /Engineering Technology/Documents/bulletins/ oet65 / www.fcc.gov/ oet/rfsafety 11526 Somnto VaUry Road, Ste. F .A. San Diego, CA 92121 .A. 866.988.0066 • www.dtechcom com Page 13/13