Laserfiche WebLink
17 August 2005 <br /> AGE-NC Project No 99-0624 <br />' Page 3 of 4 <br /> 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in ground water samples collected from wells MW-1 through MW-3 at <br /> concentrations of between 460 µg/1 (MW-1) and 53,000 µg/1 (MW-2) Benzene and toluene were <br /> only detected in the samples collected from well MW-2 at a concentration of 6 0 µg11 and 9 3 µg11, <br /> respectively The fuel additive MTBE was detected in samples from wells MW-1 through MW-3 at <br />' concentrations between 460µg/1(MW-1)and 49,000µg/1(MW-2) TAME was detected in samples <br /> from wells MW-1 through MW-3 at concentrations between 8 4µg/1(MW-1)and 600µg/l(MW-2) <br /> DIPE was detected in the sample for well MW-2 at a concentration of 11µg/1 <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 Project No CT214-0505088) and chain of <br /> custody forms are presented in Appendix C Confirmation pages of the laboratory electronic digital <br /> format (EDF) files and depth to water measurements submitted to the State of California's <br />' GeoTracker website are included in Appendix D <br />' 4.0. SUMMARY AND CONCLUSIONS <br />' The following conclusions were drawn from the results of this investigation <br /> • The depth to ground water at the site was between 52 02 feet and 53 16 feet TOC, the <br />' calculated ground water elevations was ranged between 13 73 feet and 14 01 feet below <br /> MSL <br /> • Ground water flow direction in the area of wells MW-1 through MW-6 was inferred to be <br />' flowing towards the east-northeast at a calculated gradient of between 0 006 ft/ft Due to the <br /> low hydraulic gradient at the site,slight variations in ground water measurements or changes <br /> of recharge/discharge of the local ground water could greatly modify the inferred ground <br /> rwater flow direction <br /> • TPH-g was detected in ground water samples collected from wells MW-1 through MW-3 at <br />' a maximum concentration of 53,000µg/l (MW-2) The appearance of TPH-g at the same or <br /> similar concentrations of MTBE indicates that the reported concentration of TPH-g is <br /> 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 at a <br /> maximum concentration of 49,000 µg/l (MW-2) <br />' Benzene was only detected in the samples collected from well MW-2 at a concentration of <br /> . 6 0 µg/1 <br /> IAdvanced Geoftwonmental,Inc <br /> I <br />