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11940 2 gallons) and venting of MW8 (1 88 pounds/6 25 = 0 . 3 <br /> gallons) No chlorinated solvents were detected in chromatogram <br /> comparisons of the vapor (air) samples , "i e " 1, 2, - <br /> Dichloroethene (DCE) - retention time 2 079 minutes, <br /> Trichloroethylene (TCE) - retention time 3 023 minutes and <br /> Tetrachloroethylene (PCE) - retention time 3 75 minutes . <br /> In the past, water samples from MW1 and MW6 were tested using EPA <br /> method 8240 and were below detection limits for these compounds, <br /> see Update Status Report 21, September, 1993 . Water samples <br /> obtained on March 4 , 1994 from MW1, MW6, MW9 and MW11 were tested <br /> using EPA Method 8010 and were below detection limits for these <br /> compounds Water and vapor samples obtained from MW1, MW6 and <br /> MW9 on April 19, 1995 , were tested using EPA Metod 8260 All <br /> priority compounds were below detection limits <br /> WEGE is also evaluating the need to change out BACT from Thermal <br /> Oxidation to Carbon Adsorbtion, in light of the lower amount of <br /> hydrocarbons found in the vapor stream and the cost savings of <br /> utilities, versus carbon change-out . This tentative modification <br /> to the BACT was approved by San Joaquin Valley Unified Air <br /> Pollution Control District on May 3 , 1995 <br /> TIME FRAME <br /> November, 1995 Ground water gauging and vapor <br /> extraction system air monitoring. <br /> HEALTH AND SAFETY <br /> This site is being treated as a class D site, normal common sense <br /> is to be used <br /> LIMITATIONS <br /> The conclusion and recommendations presented in this report are <br /> based upon the following <br /> A Tne 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 /> PAGE 6 R603 UPDATE-41 10/24/95 <br />