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rE4. <br /> December 9, 1996 <br /> Cal/EPA 96 DEC 10 PM 12: 00 <br /> Deparrmenrof Ms . Willard L. Alloway Pete Wilson <br /> Toxic Substances Hardin, Cook, Loper, Engel & Bergez, LLP Governor <br /> Control Lake Merritt Plaza <br /> 1999 Harrison Street, Eighteenth Floor James Secre Sy <br /> for <br /> 400Floor Street, Oakland, California 94612-3541 Environmental 4th Floor Environmental , <br /> P.O. Box 806 RE : Soil Gas Investigation Workplan for the Property Protection <br /> Sacramento, CA Located at 305 S . Hutchins, Lodi, California <br /> 95812-0806 <br /> Dear Mr. Alloway: <br /> The Department of Toxic Substances Control <br /> (DTSC) ' s November 4, 1396 letter to you required soil <br /> gas investigation be conducted at the property site <br /> located at 305 S . Hutchins Street (Site) , Lodi, <br /> California. The soil gas investigation is referred <br /> hereby as active soil gas sampling. <br /> The purposes of the active soil gas sampling are <br /> three folds : <br /> (a) Determine the horizontal and vertical extent of <br /> the volatile organic compounds found in soil and <br /> groundwater; <br /> (b) Determine if further remediation of the Site using <br /> vapor extraction system is necessary; and <br /> (c) Determine if the Site is the sole source for the <br /> VOCs detected at the Site . <br /> To achieve the above specified purposes, DTSC <br /> requires that the active soil gas sampling be conducted <br /> by a qualified soil gas contractor equipped with a <br /> mobile laboratory. Prior to the sampling, DTSC <br /> requires that a workplan be submitted for DTSC' s review <br /> and approval . The workplan should include a minimum of <br /> the following information: <br /> 1 . The objectives of the active soil gas sampling; <br /> 2 . The description of the site; <br /> 3 . The locations and depth of the sampling, and a map <br /> depicting the sampling locations; <br /> 4 . Sampling equipment, methods, procedures, and/or <br /> equipment decontamination procedures ; <br /> h <br /> MnW mR�cKYllq, <br />