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1 <br />' 26 April 2002 <br /> AGE-NC Project No 95-0128 <br /> Page 4 of 7 <br />' 4.0. FINDINGS <br /> Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations Ground water flow directions were determined by contouring the water <br /> elevations on a scaled site plan Contaminate Impact to ground water samples was assessed by <br /> laboratory analysis <br /> I <br /> 4 1 GROUND WATER ELEVATION AND GRADIENT <br /> The ground water elevation on 14 February 2001 ranged from 18 70 to 19 78 feet below mean sea <br /> level(msl) The average ground water elevation during this monitoring event was approximately 0 9 <br /> feet lower than the average ground water elevation during the October 2001 monitoring event The <br /> depth to ground water and ground water elevation data is summarized in Table 1 The ground water <br /> table occurred within the screened Intervals of the shallow screened wells The screened Intervals <br /> rin monitoring wells MW-1 to MW-3, MW-11B and MW-12B are currently drowned <br /> Ground water was determined to be flowing to the northeast on site and toward the east under the <br /> McDonalds property and toward the east and some what northeast off-site, under Pacific Avenue <br /> The average gradient of the ground water flow on-site was 0 005 feet/feet, on-site and the ground <br /> Iwater flow on-site was 0 002 feet/feet under Pacific Avenue <br /> A ground water ground water sink Is apparent near the ground water extraction well and treatment <br /> area located at the northeast corner of the site The ground water elevations are listed In Figure 3 and <br /> contoured to depict the local ground water flow direction <br /> I <br /> 42 ANALYTICAL RESULTS FROM MONITORING WELL GROUNDWATER SAMPLES <br /> I TPH-g was detected In samples collected from on-site In well MW-4, MW-5 and VW-1 at <br /> concentrations of 51 micrograms per liter(µg/1), 8,300 pg/l, 17,000 µg/1 and 820 gg/l, respectively <br /> TPH-g was detected In the samples collected from off-site, from the well located In the Pacific <br /> Avenue median the, MW-11B,MW-12A and MW-12B at concentrations of 120 µg/1, 64 µg/1, and <br /> 130 µg/1, respectively <br /> TPH-d was detected in samples collected from on-site in well MW-2, MW-4, MW-5 and VW-1 at <br /> concentrations of 67µg/1, 1,700 µg/1, 8,100 µg/1 and 230 µg/l, respectively <br /> Advanced GcoEnvi ron mental Inc <br />