AgdaPkt 2005-04-25 - Laserfiche WebLink

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Øf - ..s- AT&T Wireless. Proposed Base Station (Site No. SNFCCA1801) 2325 Euclid Avenue. Redwood City, California Study Results For a person anywhere at ground, the maximum ambient RF exposure level due to the proposed AT&T operation by itself is calculated to be 0.0091 m W /cm2, which is 1.3% of the applicable public limit; the maximum calculated level at the second floor elevation of any nearby home- due to AT&T by itself is 1.4% of the public exposure limit. It should be noted that these results include several "worst-case" assumptions and therefore are expected to overstate actual power density levels. The maximum cumulative level at ground for the simultaneous operation of both carriers is expected to be below 1.6% of the public exposure limit; cumulative levels at any of the nearby homes are expected to be well below the applicable public exposure limit. Areas on the roof of the subject building may exceed the applicable exposure limit. Recommended Mitigation Measures Due to their mounting location above the roof of the church building, the AT&T antennas are not accessible to the general public, and so no mitigation measures are necessary to comply with the FCC public exposure guidelines. To prevent occupational exposures in excess of the FCC guidelines, no access within 8 feet in front of the AT&T antennas themselves, such as might occur during building maintenance activities, should be allowed while the site is in operation, unless other measures can be demonstrated to ensure that occupational protection requirements are met. Posting explanatory warning signst on the antenna enclosure, such that the signs would be readily visible from any angle of approach to persons who might need to work within that distance, would be sufficient to meet FCC- adopted guidelines. Similar measures should already be in place for the other carrier at the site; applicable keep-back distances have not been detennined as part of this study. Conclusion Based on the infonnation and analysis above, it is the undersigned's professional opinion that the base station proposed by AT&T Wireless at 2325 Euclid Avenue in Redwood City, California, can comply with the prevailing standards for limiting human exposure to radio frequency energy and, therefore, need not for this reason cause a significant impact on the environment. The highest calculated level in publicly accessible areas is ml1ch less than the prevailing standards allow for exposures of unlimited duration. This finding is consistent with measurements of actual exposure conditions taken at other operating base stations. . Located at least 80 feet away, based on aerial photographs from Terraserver. t Warning signs should comply with ANSI C95.2 color, symbol, and content conventions, In addition, contact infonnation should be provided (e.g" a telephone number) to arrange for access to restricted areas. The selection of language(s) is not an engineering matter, and guidance from the landlord, local zoning or health authority, or appropriate professionals may be required. ~i: ~.~. HAMMETT & EDISON, INc. '~',,~ CO:--iSL:LTL,\;GENGINEERS ~l:.~-1.':'; s,,~ FRAJ\:CISCO ATl801597 Page 3 of 4