Laserfiche WebLink
' 14 November 2002 <br /> AGE-NC Project No 95-0144 <br /> Page 3 of 4 <br /> ' 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The elevation of ground water in each well was calculated by subtracting the depth to water from the <br /> ' surveyed casing elevation (Table 1) During the September 2002 monitoring event the average <br /> ground water elevation at the site was 8 16 feet below mean seal level(MSL),a decrease of 1 25 feet <br /> since the May 2002 monitoring event The average depth to water at the site was approximately <br /> ' 17 76 feet bsg The approximate hydraulic gradient for the September 2002 monitoring event was <br /> Inferred to be 0 003 ft/ft with a flow direction toward the north(Figure 3) <br /> ' <br /> Groundwater was within the screened intervals of shallow-screened wells MW-11,MW-12,MW- <br /> 13,MW-19A,MW-20A and MW-21A,but was between 1 19 feet and 4 22 feet above the screened <br /> interval in the shallow-screened wells MW-1, MW-2, MW-4, MW-5 and MW-8 <br /> Ground water elevations in the deep-screened nested wells MW-19B, MW-20B and MW-21B, <br /> screened in the Lower Water Zone, were between 166 feet and 2 56 feet lower than in the wells <br /> screened in the Upper Water Zone The approximate hydraulic gradient in the deeper-screened <br /> ground water monitoring wells for the September 2002 monitoring event was inferred to be <br /> 0 001 ft/ft with a flow direction toward the southwest (Figure 3) <br /> 32 ANALYTICAL RESULTS OF WATER SAMPLES <br /> During the September 2002 monitoring event, no target analytes were detected above laboratory <br /> reporting limits in the samples collected from wells MW-2, MW-4 and MW-5 <br /> Analytical results for the third quarter 2002 monitoring event are summarized on Tables 2 and 3 <br /> Analytical results of recent and historical ground water samples are summarized on Tables 4 and 5 <br /> The laboratory report (MAI Lab IDs 0210003-001 through 0210003-003) and chain-of-custody <br /> forms are included in Appendix B " <br /> 4.0. SUMMARY/CONCLUSIONS <br /> ' Based upon data collected during the ground water monitoring event, AGE concludes <br /> ' + The average ground water elevation at the site was 8 16 feet below MSL, a decrease of <br /> approximately 125 feet from the previous ground water monitoring event Ground water <br /> remained above the screened interval in five of the shallow-screened wells sampled during <br /> the third quarter of 2002 <br /> ' Advanced GeoEnvironmental,Inc <br /> 1 ' <br />