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f <br /> a <br /> R603 UPDATE-15 4/8/93 <br /> : vapor extraction-destruction of hydrocarbons (63999 pounds/6 . 25 = <br /> 10239 . 8 gallons) . No chlorinated solvents were detected in <br /> chromatogram comparisons; "i .e . " 1, 2, -Dichloroethane (DCE) - <br /> retention time 2 . 079 minutes, Trichloroethylene (TCE) - retention <br /> time 3 . 023 minutes and Tetrachloroethylene (PCE) - retention <br /> time 3 . 75 minutes . <br /> 6. 0 TIME FRAME <br /> April 15, 1993 Mothly update monitoring of site. <br /> May 1.5, 1993 UPDATE STATUS REPORT for April, 1993 . <br /> June, 1993 Quarterly sampling and monthly site <br /> monitoring. <br /> 7 . 0 HEALTH AND SAFETY <br /> This site is. being treated as a class D site, normal common sense <br /> is to be used, see Appendix C, Health and Safety Plan. <br /> 8.0 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 /> 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 /> the State of California and the Stockton area. Please note that <br /> the contamination of soil and/or ground water must be .reported to <br /> the appropriate agencies in a timely manner. No other warranty, <br /> expressed or implied, is made. <br /> PAGE 8 <br /> 3 <br />