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JULES COHEN & ASSOCIATES, P.C. <br /> CONSULTING Emoi-mus 41 <br /> WASHINGTON, D.C. 20036 <br /> Engineering Statement page 5 <br /> Carrboro, North Carolina <br /> Measurement data provided by the electromagnetic monitor were recorded by a <br /> Holaday, model HI-3320, data logger. The data logger input was calibrated to the electromagnetic <br /> monitor output to record data'in units of equivalent plane wave power density, milliwatts per <br /> square centimeter. The data logger was programmed to sample the meter output once each <br /> second. Data were logged for 20-second sample periods and, at the end of each sample period, <br /> the average equivalent plane wave power density encountered over the course of the sample period <br /> would have been calculated had the exposure levels been above the sensitivity threshold of the <br /> instrument. Then, the calculated average and measured minimum and maximum power density <br /> levels for each sample period would have been stored in the data logger memory for later analysis. <br /> The extremely low maximum exposure levels present at the site made rigorous analysis of the <br /> measurement data unnecessary. <br /> On the ground and inside the equipment shelter, the probe was scanned slowly in a <br /> vertical plane over an approximate one-square-meter area to simulate the surface of a human torso. <br /> At tight locations inside equipment racks containing cellular transmitters, filters, and combiners, <br /> and near transmission lines, there was not enough space to make whole body measurements. <br /> These locations simply were probed to ascertain the electromagnetic field strength present. <br /> Findings <br /> The exposure level present at each.survey location was below the sensitivity threshold <br /> of the elecumupedc monitor. Thus, exposure at the site inside the tower fence and equipment <br /> shelter is Iewd=0.17 parrot of the MPE for controlled environments, the sensitivity threshold <br /> of the instrvosmt for controlled environments. At publicly accessible locations, exposure was less <br /> the 0.86 percent of the MPE for uncontrolled environments, the sensitivity threshold of the <br /> instrument for uncontroUed environments. Because of the extremely low electromagnetic field <br />