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1 ' I 27 February 2004 r AGE-NC Project No 95-0144 Page 5 of 7 ' 3.0. FINDINGS Ground water elevation and flow direction were inferred from field data, hydrocarbon-impact to, ' ground water was quantified from laboratory analysis of the ground water samples 3 1 ANALYTICAL RESULTS OF SOIL SAMPLE 1 u„ ' One soil sample collected from pilot boring MW-25 at 30 feet bsg was analyzed for the constituents listed in section 2 14 Analytes of concern were not detected at or above laboratory reporting limits I Analytical results of soil samples are summarized on Table 1 The laboratory report (CTEL r Laboratory ID 0307-102-2), quality assurance and quality control (QA/QC) report and chain-of- custody forms are included in Appendix D 32 GROUND WATER ELEVATION AND GRADIENT The elevation of ground water in each well was calculated by subtracting the depth to water from the lie surveyed casing elevation(Table 2) During the August 2003 monitonng'event the average ground water elevation in the shallow screened wells at the site was 8 7 feet below mean seal level (MSL), a decrease of 0 6 feet since the April 2003 monitoring event The average ground water elevation in ' the deeper screened wells was approximately 10 2 feet bsg The average depth to water in the shallow screened wells was approximately 1 84 feet shallower than in the deeper screened wells ' -(Table 2) The approximate hydraulic gradient for the August 2003 monitoring event was inferred to be 0 003 ft/ft with a flow direction toward the north-northeast for the first water zone(Figure 3) Ground water was within the screened intervals of shallow-screened wells MW-11, MW-12, ' MW-13,MW-18,MW-19A,MW-20A and MW-21A,but was between 0 37 feet and 3 33 feet above the screened interval in the shallow-screened wells MW-1, MW-2, MW-4, MW-5 and MW-8 ' Ground water elevations in the deep-screened nested wells MW-19B, MW-20B and MW-21B, screened in the Lower Water Zone, were between 1 76 feet and 2 03 feet lower than in the wells ' screened in the Upper Water Zone The ground water elevation of deep-screened well MW-25 was I approximately 10 48 feet below MSL, similar to the other deep-screened wells The approximate hydraulic gradient in the deeper-screened ground water monitoring wells for the August 2003 ' monitoring event was inferred to be 0 03 ft/ft with a flow direction toward the north-northwest (Figure,3 - see blue lines) , I Advanced GeoEnvironmental,Inc I ,