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Job No. 00760 Page: 3 <br /> possible contaminants to the atmosphere. <br /> Vacuum influence gauges were transported in a foam packing <br /> to insure their accuracy. <br /> RESULTS AND DISCUSSION <br /> The performance test was conducted using existing vapor <br /> recovery wells VW-6, VW-7 , VW-8, VW-9 and groundwater <br /> monitoring wells MW-1, MW-2 , MW-3 and MW-4. The depth to <br /> groundwater varied from 51. 55' to 52 . 60' (See table 2) . <br /> The gases present in wells VW-6, VW-7, VW-8 , VW-9 and MW-4 <br /> (the five wells currently piped for vacuum extraction) , <br /> were analyzed for total hydrocarbon concentrations on a <br /> volume/volume basis (See table 3) . Analysis was performed <br /> using a Flame Ionization Detector (FID) . The average <br /> hydrocarbon concentration was 27, 300 ppm, with a range from <br /> 25,500 - 29, 000 ppm. Monitoring well MW-2 was not piped, <br /> but a conduit from the manifold area__ to the well is <br /> present. <br /> Four vapor recovery wells (VW-6, VW-7, VW-8, and VW-9) and <br />