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Working To Restore Nature <br /> In August 1993, wells MW-1, MW-2, and MW-3 were monitored and sampled. Analytical <br /> results showed that MW-1 had no measurable concentrations of petroleum hydrocarbons in the <br /> ' groundwater. Wells MW-2 and MW-3 contained detectable levels of petroleum hydrocarbons <br /> SAMPLING ACTIVITIES <br /> On June 2, 1994, groundwater samples were collected by RESNA from three shallow monitoring <br /> wells (MW-1, MW-2 and MW-3). The locations of the monitoring wells are shown on Plate <br /> 2. <br /> Prior to collection of groundwater samples, the depth to water, pH, electrical conductivity, and <br /> ' temperature were measured in the monitoring wells and recorded. A minimum of three well <br /> casing volumes were purged from each well prior to sampling The wells were allowed to <br /> irecover and samples were collected from each well using dedicated disposable bailers. <br /> iThe groundwater samples collected from each well were submitted to Argon Mobile Laboratories <br /> (FLAP cert. no 1873) for analysis of total petroleum hydrocarbons as gasoline (TPHg) and <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX) utilizing EPA methods 50301801518020. <br /> Groundwater well purge and sample logs are provided in Appendix A. <br /> ANALYTICAL RESULTS <br /> All petroleum hydrocarbon analytes for the sample collected from well MW-1 were reported <br /> below laboratory method detection limits The sample collected from well MW-2 contained <br /> concentrations of TPHg (3,740 µg11), benzene (6.9 µg11), toluene (30 µg/1), ethylbenzene (27 <br /> jug/1),and xylenes (250µg11) The sample collected from well MW-3 contained concentrations <br /> of TPHg (140,000 µg11), benzene (150 µg11), toluene (6.7 µg/1), ethylbenzene (2,000 µg11), <br /> and xylenes (12,000µg/1) A summary of analytical results is presented in Table 1. Laboratory <br /> data sheets and chain-of-custody documentation are provided in Appendix B <br /> 1500781QUARTLYI2QR-1994 FNL 2 <br />