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R603 UPDATE-24 1/21/94 <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 <br /> 5 .0 TIME FRAME <br /> January, 1994 Remox air sampling, adjustments. <br /> Monthly depth to water/vacuum <br /> measurements . <br /> February, 1994 Montly air sampling and water <br /> gauging. <br /> March, 1994 Quarterly ground water sampling and <br /> monthly site monitoring <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 , 4 LIMITATIONS <br /> The conclusion and recommendations presented an this report are <br /> based upon the following: <br /> A The exploratory test borings drilled at the site <br /> B. The Bouwer and Race 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 /> License #513857, have been conducted in a manner consistent with <br /> the level of care and skill ordinarily exercised by members of <br /> our profession currently practicing under similar conditions in <br /> PAGE 4 <br />