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R603 UPDATE-28 5/24/94 <br /> As of April 26, 1994 an estimated 11864 gallons of gasoline range <br /> hydrocarbons have been removed from the soil and ground water <br /> beneath this site . Previously removed floating product (40 25 <br /> gallons) , condensation from vapor extraction (48 . 75 gallons) , <br /> projected petroleum hydrocarbon vapor extraction-destruction <br /> (73596 pounds/6 25 = 11775 gallons) . No chlorinated solvents <br /> were detected in chromatogram comparisons; "i .e. " 1, 2, - <br /> Dichloroethane (DCE) - retention time 2 079 minutes, <br /> Trichloroethylene (TCE) - retention time 3 023 minutes and <br /> Tetrachloroethylene (PCE) - retention time 3 . 75 minutes Also <br /> water samples from MW1 and MW6 were tested using EPA method 8240 <br /> and were below detection limits for these compounds, see Update <br /> Status Report 21, September, 1993 . And water samples obtained on <br /> March 4 , 1994 from MW1, MW6, MW9 and MW11 were tested using EPA <br /> Method 8010 and were below detection limits for these compounds . <br /> 5 . 0 TIME FRAME <br /> May, 1994 Monthly air sampling and watez <br /> gauging <br /> 6 . 0 HEALTH AND SAFETY <br /> This site is being treated as a class D site, normal common sense <br /> is to be used <br /> 7 . 0 LIMITATIONS <br /> The conclusion and recommendations presented in this report are <br /> based upon the following. <br /> A. The exploratory test borings drilled at the site <br /> B The Bouwer and Rice Slug test <br /> C. The Vapor Extraction Source Test . <br /> D The observations of field personnel <br /> E. The results of laboratory analysis performed by a state <br /> certified laboratory <br /> E. Referenced documents <br /> F Specifications supplied by "REMOX" for the Authority to <br /> Construct Permit . <br /> G. Our understanding of the regulations of the State of <br /> California, San Joaquin County and City of Stockton. <br /> The services performed by Western Geo-Engineers, a corporation <br /> under California Registered Geologist #3037 and/or Contractors <br /> PAGE 4 <br />