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<br />7i{.4 <br /> <br />AT&T Wireless. Proposed Base Station (Site No. SNFCCA1801) <br />2325 Euclid Avenue. Redwood City, California <br /> <br />installed at some height above ground. The antennas are designed to concentrate their energy toward <br />the horizon, with very little energy wasted toward the sky or the ground. Along with the low power of <br />such facilities, this means that it is generally not possible for exposure conditions to approach the <br />maximum pennissible exposure limits without being physically very near the antennas. <br /> <br />Computer Modeling Method <br /> <br />The FCC provides direction for detennining compliance in its Office of Engineering and Tecln)ology <br />Bulletin No. 65, "Evaluating Compliance with FCC-Specified Guidelines for Human Exposure to <br />Radio Frequency Radiation," dated August 1997. Figure 2 attached describes the calculation <br />methodologies, reflecting the facts that a directional antenna's radiation pattern is not fully fonned at <br />locations very close by (the "near-field" effect) and that the power level from an energy source <br />decreases with the square of the distance from it (the "inverse square law"). The conservative nature <br />of this method for evaluating exposure conditions has been verified by numerous field tests. <br /> <br />Site and Facility Description <br /> <br />Based upon infonnation provided by AT&T, including zoning drawings by Diamond Services, dated <br />December 6, 2004, it is proposed to mount six Kathrein Scala Model AP 14/17 -880-l940-065D <br />directional dual band antennas within a new fiberglass enclosure, configured to resemble a chimney, to <br />be installed above the roof of the First Congregational Church located at 2325 Euclid Avenue in <br />Redwood City. The antennas would be mounted with up to 70 downtilt at an effective height of about <br />611/2 feet above ground, 51/2 feet above the peak of the roof, and would be oriented in pairs at <br />1200 spacing, to provide service in all directions. The maximum effective radiated power in any <br />direction would be 2,935 watts, representing simultaneous operation at 1,880 watts for PCS service <br />and 1,055 watts for cellular service. Presently located above the roof at the opposite end of the <br />building are similar antennas for use by Verizon Wireless, another wireless telecommunications <br /> <br />carner. <br /> <br />The site was visited on December 28, 2004, a non-holiday weekday,. by Mr. John W. Mowat, a <br />qualified employee of Hammett & Edison, Inc. The maximum power density level observed at any <br />ground level location was 0.22% of the most restrictive public limit for the operation of existing RF <br />services at the site as installed and operating at that time. The measurement equipment used was a <br />Wandel & Goltennann Type EMR-300 Radiation Meter with Type 8 Isotropic Electric Field Probe <br />(Serial Nos. P-OO36). Both meter and probe were under current calibration by the manufacturer <br /> <br />:,- ','~~£ HAMMEIT & EDISON, INC <br />'.':. . "..',u;i CU:--;SCL TING ENGINEERS <br />~~.~ S.-\~ FRAI\:CISCO <br /> <br />AT1801597 <br />Page 2 of 4 <br />