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Page 4, G1111es 10/17/94 in the three monitor wells The domestic well (G-1) could not be stabilized After water levels were obtained, wells MW-1, GT-i and GT-2 were purged of about 10 gallons using reusable PVC bailers During the purging process the recovered water was tested with a Corning pH, Temperature and Conductivity instrument at about two-gallon intervals Purging and testing were continued until pH, Temperature and Conductivity readings stabilized(Appendix C) Purged ' water was placed into a sealed and labeled 55-gallon drum and stored on site After purging, the wells were allowed to recharge prior to sample collection Samples were collected using new disposable bailers for each well Samples were c9llected from the upper thirty(30) inches of the water column and placed in stenlized bottles The bottles were labeled and placed in a pre-cooled ice chest The samples were subsequently transported via chain-of-custody to McCambell Analytical Samples were analyzed for TPH-gasoline, TPH-diesel, and BTE&X ' 4.3 Depth to Groundwater& Gradient Depth-to-groundwater measurements, calculated groundwater elevations, and physical observations for monitor wells MW-1, GT-1 and GT-2 are presented in Table 2 Figure 4 illustrates the present direction of groundwater flow At the present time, all three monitoi wells are on strike with the groundwater gradient contours, preventing reliable measurement of the 1 gradient and flow direction 4.4 Laboratory Results Groundwater samples from monitor wells MW-1, GT-1 and 2 were analyzed for TPH-diesel (EPA method 8015), TPH-gasoline (EPA method 602) and volatile aromatic hydrocarbons (EPA ' method 8020) The results from these laboratory analyses are summarized in Table 2 The laboratory report is presented in Appendix B Analytical results from previous sampling events are included in Table 2 for comparison purposes Gasoline and diesel Hydrocarbons, including aromatics, were detected in the water sample from GT-2 Diesel compounds along with xylene were detected at low concentrations in GT-1, MW-1 had no detectable contamination 1 5.0 DISCUSSIONS 5.1 Extent of Soil Contamination Four borings have been drilled at this site since assessment of the extent of soil contamination began in 1990 All four penetrated a gasoline and diesel contaminated zone at a depth of approximately 35 to 50 feet Figure 5 is an east-west trending cross section that illustrates the contaminated zone in a two-dimensional view through the three monitor wells The Iaboratory data indicate that all borings are within the plume of contaminated soil, and the east-west extent of soil contamination cannot be precisely determined at this time At the present time, no data are r