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R603 UPDATE-12 12/22/92 occasional auto shutdowns due to high temperature (15500F) in the pre-oxidation chamber On July 20, 1992, the heat exchanger malfunctioned and the incinerator shut down due to low temperature . The unit remained off until it was replaced on August 18 , 1992 with a new unit Presently (December 18, 1992) the REMOX units have operated for a total of 5937 hours out of a total of 9574 5 hours (62%) . The new replacement unit has operated 1935 hours out of 2927 5 hours (660) , removing and destroying 48310 pounds of gasoline range hydrocarbons and an estimated 32 , 653 pounds of oxidized gasoline range hydrocarbons as CO2 (Average 300 cfm flow rate X average CO2% (0 75) x total hours operated/24) for a total of 80, 963 pounds of gasoline range hydrocarbons removed from the subsurface, see Tables 2 , 3 and 5 and Appendix B-Air Monitoring Reports Condensation from vapor extraction is collected in moisture drop out tanks constructed of 12" 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 December 1, 1992 , a total of 22 5 gallons of product and 162 gallons of water have been removed from the condensation traps, 0 06 gallons product and 30 gallons water from EX-4, 9 . 18 gallons product and 66 93 gallons water from MW- 10 , and 13 23 gallons product and 65 09 gallons water from MW2/3 No fluids have collected in the MW-1 condensation trap The "ConVault" was connected to the vapor recovery manifold on October 1, 1992 Presently there is no floating product on the stored water surface within the "ConVault" Observations made on October 8, 1992 , showed that the floating product had been removed by the vacuum placed onto the "ConVault" A water sample was then obtained and analyzed through WEGE' s non certified laboratory and showed the stored water had 30 . 5 Mg/L gasoline range hydrocarbons (TFH) , 0 994 Mg/L benzene, 9 . 679 Mg/L toluene, and 23 96 Mg/L xylenes A water sample was obtained of the "Convault" water on October 13 , 1992, and again analyzed by WEGE, non certified The water was dramatically reduced in hydrocarbons and showed ti-le following concentrations TFH 7 78 Mg/L, benzene 0 125 Mg/L, toluene 2 953 Mg/L and xylenes 7 . 362 Mg/L On December 1, 1992 , a sample of the water being treated by air stripping inside rhe "ConVault" was obtained for certified laboratory analysis, before dumping approximately 800 gallons of this water to the City of Stocktons sanitary sewer, see Table 4 and Appendix A. as of December 1R 7992 a total of 13 . 016 85 gallons of gasoline range hydrocarbons have been removed from the soil and ground water beneath this site . The condensation traps recovery (22 5 gallons) , previously removed floating product (40 25 gallons) , projected petroleum hydrocarbon in situ oxidation CO2 vapor PAGE 8