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R603 UPDATE-25 2/10/94 pounds per day destruction was increased to nearly 70 pounds per 40 day on August 23, 1993 , just prior to turning the system off for repair of the compressor and changing the pilot/burner assembly. Presently the system is destroying an estimated 31 pounds per day of gasoline range hydrocarbons, see Table 2 . CONDENSATE REMOVAL BY LTT Condensation from vapor extraction is collected in moisture drop out tanks constructed of 121" PVC pipe, before the manifold, to prevent moisture build up on the vacuum pump filter. All fluids removed from the condensation traps are placed in the 1000 gallon "ConVault" As of November 29, 1993 LTT had removed an estimated 5047 gallons of condensate/water and 26 . 25 gallons of product from the condensate traps. Total fluids removed as of December 15, 1993 • 5209 gallons of water/condensate and 48 75 gallons of product (162 previously recovered condensate water and 22 . 5 gallons of product) 4 . 0 SUMMARY There has been no evidence of floating product or product sheen on the ground water in MW1 since April 14 , 1992 and MW3 and MW10 since November 11, 1992 Only occasional product sheen is found with the condensate recovered from the vapor extraction moisture dropouts and manifold Vapor recovery has reduced the hydrocarbons in ground water significantly since the May 25, 1990 sampling, see Table 1 Using benzene as an indicator, monitoring wells MW1, MW4 , MWS, MW6 , MW7 and MW9 have been reduced to below detection limits while the wells being utilized for vapor extraction (MW3 , and MW10) have been reduced by better than 9996 MW2, which is also used for vapor extraction has been reduced 97%- and MW8 has been reduced by approximately 74%- Of the newly installed wells MW11 and MW12 , MW12 has not shown any significant change in benzene concentrations until this most recent sampling, where all of the gasoline range hydrocarbons/BTEX have increased MW11 has always tested below detection limits On December 22 , 1993 , a sample of the water being treated by air stripping inside the "ConVault" was obtained for certified laboratory analysis This was accomplished to prove the suitability for dumping the approximately 800 gallons of this cleaned water to the City of Stockton' s sanitary sewer, see Appendix B and Table 4 . As of February 2 , 1994 an estimated 11628 gallons of gasoline range hydrocarbons have been removed from the soil and ground water beneath this site Previously removed floating product (40 . 25 gallons) , condensation from vapor extraction (48 . 75 gallons) , pro3ected petroleum hydrocarbon vapor extraction- destruction (72119 pounds/6 25 = 11539 gallons) No chlorinated solvents were detected in chromatogram comparisons, "i .e . " 1, 2 , - Dichloroethane (DCE) retention time 2 079 minutes, Trichloroethylene (TCE) retention time 3 . 023 minutes and PAGE 3