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I Ih <br /> � ' I <br /> '18 April'2003 <br /> `I AGE-NC Project No 97-0333 <br /> 'Page 7 of 11 <br /> , I <br /> ! kr <br /> I S � <br /> The 10 November 2002 groundwater elevation data collected from the Rainwater Car Wash site was I ' <br /> plotted for the informal First Zone, Second Zone,; Third Zone and Primary Aquifer 'Zone ` <br /> hydrogeologic flow units, and,are depicted in Figures 4 through 7 ' <br /> I , <br /> I I I <br /> 34 1 1 _First Zone Aquifer <br /> Ground water elevation data collected in the First Zone Aquifer (15 to 47 feet bsg) inferred an ' <br /> inward-radiating ground water flow towards a ground water depression in the area of wells MW-2; I <br />' e MW-6, MW-7 and EW-1 (Figure 4),at an approximate gradient of 0 004 ft/ft or less Off-site in the <br /> area of wells MW-11, MW-12 and MW-13, the,ground water flow direction was north-northwest' <br /> I II <br /> 3 4 12 Second Zone Aquifer <br /> Ground water elevationldata collected in the Second Zone Aquifer (58 to 92 feet bsg) inferred a <br /> north-northwest ground water flow direction Ground watengradients were approximately 0 003 ft/ft ' <br /> or less near the site(Figure 5) <br /> , r <br /> I <br /> i <br /> 3 4 13 Third Zone Aquifer <br /> I I I <br /> E ^ I 1 ', I F i 1 II n 1 ' 1F 'uI l <br /> 4 Ground water elevation data collected in the Third Zone Aquifer (102 to 120 feet bsg) inferred a <br /> north-northwest ground water flow direction Ground water gradients were approximately 0 002 ft/ft <br /> ori less near the site (Figure 6) ' I <br /> 1f <br /> I I r <br /> I <br /> 3 4 1 4 Primary Aquifer Zone I <br /> ' I Ground water,elevation data collected in the Third Zone Aquifer (128 to 150 feet bsg) inferred a' E <br /> north-northwest ground water flow direction Ground water gradients were approximately 0 001 ft/ft <br /> or less near the,site (Figure 7) <br /> 34 2 'L'aboratory Results of Ground Water Samples a I II <br /> During the November 2002 sampling event, TPH-g was detected in water samples collected from <br /> wells MW-2, MW-3, MW-4, <br /> MW-6, MW-7 (A-D); MW-8 (B-D); MW-9 (A-B) MW-10 (A-D), <br /> 11 <br /> MW-11D1 and MW-12 (A-C) at'concentrations as high as 91,000 µg/l (MW-2) The laboratory <br /> I <br /> reports noted that the TPH-g sample chromatogram from wells MW-4,MW 19A and MW-9B did not <br /> I t <br /> N, 1 II <br /> I <br /> Advanced GeoEnvironmentair ,Inc" ' <br /> u <br /> All <br /> II I <br /> E9 pp i I <br /> � <br /> I I II <br />