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The comparison graphs show the concentration of the selected analytes displayed at the different sample intervals of borings that represent the areas of the site investigated, i e SB 1 compared to SB4, SB6 compared to SB3, and MWIO and SB7 compared to MW2 and MW3 All comparisons show that vapor recovery is effective in removing the BTEX's and the majority of the TPHg from the soil and groundwater With newly installed well MW13, these removals should be enhanced Soil TPHg in soil ranged from a high of 74 mg/Kg from the 45-foot depth at SB7 to below Iaboratory detection limits for all samples obtained at and above the 40-foot depth Xylenes in soil ranged from a high of 7 7 mg/Kg from the 50-foot depth at SB7 to below laboratory detection limits for all samples obtained at or above the 40-foot depth Water TPHg in water ranged from a high of 46 mg/L at SB7 to 28 mg/L at SB6 Benzene in water range from a high of 15 ug/L at SB5 and SB7 to below laboratory detection limits at SB6 Toluene in water ranged from a high of 590 ug/L at SB7 to below laboratory detection limits at SB6 Ethlybenzene in water ranged from a high of 540 ug/L at SBS to below laboratory detection limits at SB6 Xylenes in water ranged from a high of 15,000 ug/L at SB7 to 110 ug/L at SB6 See Table 2 for confirmation soil and water results Rinseate and Excavated Soil Handling All purged well water and rinseate created from the dnlling/sampling activities were placed into the ConVault for aeration treatment prior to discharge to sewer, under City of Stockton sewer discharge permit Update of Vapor Extraction System Operation The vapor extraction system continued to work through the months of April, May, June and July 1997 for a total of 12,215 hours (509 days) Vapor extraction total removed hydrocarbons as . gasoline using activated carbon as a control is 196 pounds, averaging 0 37 pounds per day at an 6