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' /1 Clayton <br /> ��GROl1P SERVC ES <br /> Depth to Water (btoe) Total Depth (btoc) Casing Water <br /> Well No (ft) (ft) Elevation Elevation <br /> (ft MSL) (ft MSL) <br /> MW-1 706 2482 431 -275 <br /> MW-2 1052 2786 709 -343 <br /> MW-3 1047 2837 806 -2 41 <br /> btoc means below top of casing <br /> The wells were purged using disposable Teflon® bailers with approximately 12 gallons <br /> of groundwater(roughly 4 well volumes)purged from each well Groundwater <br /> parameters (pH, conductivity, redox, temperature, and turbidity) were measured initially <br /> and following every three gallons of discharge The completed Groundwater Sampling <br /> Data Sheets are included to Appendix A <br />' Groundwater samples also were obtained using disposable Teflon® bailers with a <br /> bottom-emptying device All sample containers, provided by the laboratory, were filled <br /> with groundwater, sealed, packed in protective plastic bags, placed in a cooler with ice, <br /> and submitted under chain of custody protocol on the same day as collected to Severn <br /> Trent Laboratories, Inc (STL) in Pleasanton, California STL is a California-certified <br /> laboratory Groundwater samples from the three monitoring wells were submitted for <br /> analysis of Total Petroleum Hydrocarbons as diesel fuel (TPH-diesel) in accordance with <br /> USEPA Method 8015M Each sample was also to be analyzed for TPH-gas, benzene, <br /> toluene, ethylbenzene, and xylenes (BTEX), Methyl tert-butyl ether(MTBE), tert-Butyl <br />' alcohol (TBA), Di-isopropyl Ether(DIPE), Ethyl tert-butyl ether (ETBE), tert-Amyl <br /> methyl ether(TAME), 1,2-DCA, and EDB to accordance with EPA Method 8260B <br /> GROUNDWATER ANALYTICAL RESULTS <br /> TPH-gas, BTEX, MTBE, TBA, DIPE, ETBE, TAME, 1,2-DCA, and EDB were not <br />' detected in any of the three groundwater samples TPH-diesel was detected in each of the <br /> groundwater samples at concentrations of 110 µg/L (MW-1), 64 µg/L (MW-2) and 530 <br /> µg/L (MW-3) The laboratory has flagged each of these diesel values as being a <br />' hydrocarbon that does not match the pattern of their diesel standard The results of these <br /> analyses are included with the laboratory reports in Appendix B <br />' Groundwater at the site flows to the southeast at a gradient of 0 0088 The groundwater <br /> flow direction is shown on Figure 3 <br />' 4.0 SUMMARY AND CONCLUSIONS <br />' Based on the requirements of the PHD/EHD, the second quarterly groundwater <br /> . monitoring event was conducted at the site Groundwater samples were analyzed for <br /> TPH-gas, TPH-diesel, BTEX, MTBE, TBA, DIPE, ETBE, TAME, 1,2-DCA, and EDB <br /> 2 <br /> 5\Proj\P02263\Q2 Rpt doc <br />