Laserfiche WebLink
CLEARWkTER <br /> G R O U P, I N C <br />' 4.0 RESULTS AND DISCUSSION <br />' 4.1 Water Level Monitoring Data <br /> On December 29, 1994, the depth to ground water-in each of the wells ranged from <br />' 68 84 to 69.33 feet bgs Groundwater flow was determined to be westerly at an <br /> approximate gradient of 012% (0 0012 feet/foot) Depth to water measurements and <br /> wellhead elevation data were used to calculate groundwater elevation contours <br />' (Figure 3). Groundwater flow direction is consistent with that measured during <br /> earlier phases of site characterization <br />' 4.2 Groundwater Sample Analytical Results <br /> Neither TPHg nor BTEX compounds were detected in concentrations exceeding <br />' method detection limits in any of the collected samples A summary of <br /> groundwater elevations and analytical results is presented on Table 2 Hydrocarbon <br /> concentrations are displayed graphically on Figure 4 A copy of the laboratory <br />' reports and chain-of-custody forms are attached as Appendix C <br /> 5.0 RECOMMENDATIONS <br /> Results of analysis of groundwater samples collected during this phase of activity are <br /> consistent with those of previous sampling events No traces of gasoline <br /> constituents were detected in any of the collected samples Based on these results <br /> and on the fact that results of previous site characterization indicate that soil <br /> contamination at depth is restricted to the area in the immediate vicinity of the <br /> gasoline dispenser island (near MW-1), it is recommended that only MW-1 be <br /> included in future quarterly sampling events It is also recommended that watea <br /> Isamples collected from MW-1 be analyzed for concentrations of TPHd for the next <br /> two quarters, as these constituents were detected during the RESNA 8/94 sampling <br /> event <br /> I <br /> D-102 4Q94 3 February 3, 1995 <br />