Laserfiche WebLink
01 June 2006 <br /> AGE-NC Project No 02-0977 <br /> Page 3 of 5 <br />' The ground water was inferred to be flowing towards the south at a calculated gradient of 0 002 foot <br /> per foot (ft/ft) Figure 3 illustrates the contoured ground water elevations as measured on 22 <br /> March 2006 <br /> I <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' TPH-g was detected in ground water samples collected from wells MW-1,MW-2,MW-3 and MW-5 <br /> at concentrations as high as 180,000 µg/1 from MW-2 <br /> 1 Fuel additives MTBE and TAME were detected in samples collected from wells MW-1 through <br /> MW-3 and MW-5 at concentrations as high as 180,000 µg/1 and 400 µg/1, respectively, DIPE was <br />' detected from MW-2 at a concentration of 9 3 µg/l <br /> No other constituents of concern were detected at or above laboratory reporting limits in the analyzed <br />' samples Previous and current analytical results of ground water monitoring well samples are <br /> summarized in Table 2 The laboratory report (CTEL Lab I D No 0603147) and chain of custody <br /> forms are presented in Appendix B Confirmation pages of the laboratory electronic digital format <br />' . (EDF) files and depth to water measurements submitted to the State of California's GeoTracker <br /> website are included in Appendix C <br /> 1 <br /> 4.0. SUMMARY AND CONCLUSIONS <br />' The following summary and conclusions were drawn from the results of this investigation <br />' • The depth to ground water at the site was between 5148 feet and 52 61 feet TOC, the <br /> calculated ground water elevations ranged between 13 18 feet and 13 44 feet below MSL <br /> • Ground water flow direction in the area of wells MW-1 through MW-8 was inferred to be <br />' flowing towards the south at a gradient of approximately 0 002 ft/ft Due to the low hydraulic <br /> gradient at the site, slight variations in ground water measurements or changes of <br />' recharge/discharge of the local ground water could greatly modify the inferred ground water <br /> flow direction <br /> • TPH-g was detected in ground water samples collected from wells MW-1 through MW-3 and <br />' MW-5 at a maximum concentration of 180,000 dig/1 (MW-2) The appearance of TPH-g at <br /> the same or similar concentrations of MTBE indicates that the reported concentration of <br /> TPH-g is actually an isolated MTBE peak, which falls within the same carbon range <br />' The fuel additive MTBE was detected in samples from wells MW-1 through MW-3 and <br /> . MW-5 at a maximum concentration of 180,000 dig/l (MW-2) Between November 1999 and <br />' Advanced GeoEnvironmental,Inc <br /> I ^ <br />