Laserfiche WebLink
15 December 1997 <br /> AGE-NC Project No 96-0211 <br />' Page 2 of 3 ' <br />' were transported in a chilled container to Mc Campbell Analytical Inc (MAI) of Pacheco, California <br /> and analyzed in accordance with EPA ,method 503018015m and 602 for total petroleum <br /> hydrocarbons quantified as gasoline,volatile aromatic compounds (benzene, toluene, ethylbenzene <br />' and total xylene BTE&X)and methyl tertiary butyl ether(MTBE) The samples were also analyzed <br /> in accordance with EPA methods 8260m and 8260 for methyl-tert-butyl ether MTBE and other <br /> oxygenated fuel additives, including tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl <br />' tertiary butyl ether (ETRE) and tertiary amyl methyl ether (TAME) and other volatile organic <br /> compounds <br /> r 3 <br /> 3.0. FINDINGS <br /> 3 1 GROUND WATER'ELEVATION AND GRADIENT <br /> The elevation of ground water in each well was calculated by subtracting the depth to ground water <br /> from the surveyed casing elevation (Table 1) Monitoring well casing elevations were surveyed <br /> relative to monitoring well MW-1 Ground water gradient on 23 September 1997 was calculated to �- <br /> Abe 0 004 ft/ft directed toward the north-northwest The relative ground water elevation at the site is <br /> illustrated in Figure 3 - Relative Ground Water Elevation <br /> 32 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> fTPH-g was detected in the ground water samples from monitoring well MW-1, MW-2 and MW-3 <br /> at a concentrations of 120, 130 and 110 parts per billion (ppb, reported as micrograms per liter), <br /> respectively BTE&X compounds were detected in the water sample from monitoring well samples <br /> at a maximum concentration of 2 2 ppb of benzene MTBE, TBA, DIPE, ETBE, TAME were not <br /> detected in any of the water samples analyzed <br /> Analytical results of ground water samples are summarized on Table 2 The laboratory report (MAI <br /> Laboratory ID 81082 through 81084) and chain-of-custody are presented in Appendix B <br /> 4.0. CONCLUSIONS AND RECOMMENDATIONS <br /> y 41 CONCLUSIONS <br /> Based upon results of the ground water monitoring, AGE concludes <br /> • The lateral extent of hydrocarbon-impacted ground water at the site has not been determined <br />