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Assuming P1 = P2 = 14 7 lb/int , P cancels from the equation leaving V2 = V1T2/T1 V1 = Q cf/m x 1440 min/day T2 = 491 58oR Tl = 459 58 + TOF at site V2 = Q cf/min x 1440 min/day x 491 580P/ (459 580 + TOF) X lb/day = C ug/l x 0 0000000621 lb 1/ug cf x Q cf/min x 1440 min/day x 491 58oR/ (459 580 + TOF) Q for the Influent sample = The well flow rate + the air flow 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 The last evidence of product , as a sheen in the condensate recovery system, was on March 1, 1993 Vapor recovery has reduced the hydrocarbons in ground water significantly since the May 25 , 1990 sampling, see Table 1 On January 31, 1996 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 this cleaned water to the City of Stockton' s sanitary sewer This water (800 gallons) was discharged to sewer on February 20 , 1996 Since that time there has been no additional discharge to sewer Bio-venting of MW8 was initiated on October 26, 1994 Sample results obtained of the ground water at and near MW8 suggests that this weekly venting is beneficial in controlling the migration of the gasoline hyrocarbon plume . As of December 19, 1995 an estimated 12065 2 gallons of gasoline range hydrocarbons have been removed from the soil and ground water beneath this site The 12065 2 gallons consists of previously removed floating product (40 25 gallons) , condensation from vapor extraction ldA '75 g l l /� ti jj 11 gallons, , projeCteci petroleum hydrocarbon vapor extraction-destruction (74849 pounds/6 25 11975 8 gallons) and venting of MW8 (2 39 pounds/6 25 = 0 38 gallons) No chlorinated solvents were detected in chromatogram comparisons of the vapor (air) samples , 11i e 1, 2 , - Dichloroethene (DCE) - retention time 2 079 minutes . Triuliloroechylene ( VLE) - retention time 3 023 minutes and Tetrachloroethylene (PCE) - retention time 3 75 minutes In the past, water samples from MW1 and MW6 were tested using EPA method 8240 and were below detection limits for these compounds see Updace Status Report 21, September, 1993 Water samples obtained on March 4 , 1994 from MW1, MW6 , MW9 and MW11 were tested using EPA Method 8010 and were below detection limits for these compounds Water and vapor samples obtained from MW1 , MW6 and MW9 on April 19, 1995, were tested using EPA Metod 8260 All PAGE 5 R603 UPDATE-43 3/25/96