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07/29/2003 11:56 20946711 <br /> AGE STOCKTON PAGE 21/24 <br /> February 20, 1997 <br /> Cal PA <br /> Pete Wilson <br /> Department of Governor <br /> Toxic Substances Mr. W i l l i am Little <br /> Control Advanced GeoEnvironmental, Incorporated .Tames M. Strock <br /> 1803 West March Dane, Suite A Secretary for <br /> 400 P Street, Stockton, California Environmental <br /> 4th Floor Protection <br /> P.O. Box 806 RE: ACTIVE SOIL GAS SAMPLING WORKPLAN AT THE CAIN <br /> Sacramento, CA ELECTRICAL COMPANY SITE LOCATED AT 230 N. CHURCH <br /> 95812-0806 STREET, LODI, CA <br /> Dear Mr. Little: <br /> The Department of Tonic Substances Control. (DTSC) <br /> has reviewed the Active Soil Gas Sampling Worl-.plan, <br /> prepared for the Cain Electrical Company located at 230 <br /> N. Church Street, Lodi, California. DTSC has two <br /> comments : <br /> 1 . Page 1. . The second paragraph "The purpose of this <br /> investigation is to determine if the site is a source <br /> of tetrachloroethane (PCE) and trichloroethane (TCE) . " <br /> Comments : <br /> The Site has been determined a source of PCE <br /> contamination found at the Site and in areas adjacent <br /> to the Site (NERI, 1996) . However, additional <br /> information is needed to determine if the Site has <br /> contributed to the TCE contamination found in the City <br /> Drinking Water Well number (CW #) 2, located <br /> approximately 50 feet down gradient from the Site. <br /> Therefore, in addition to determine if the Site is <br /> the source for the PCE contamination found at the Site <br /> and in areas adjacent to the Site, the active soil gas <br /> sampling is also conducted to determine: <br /> (a) The horizontal and vertical extent of the PCE <br /> contamination found at the Site and in areas <br /> adjacent to the Sitei and <br /> (b) if the Site has contributed to the TCE <br /> contamination found in the City well, CW # z . <br /> 2 _ Figure 2 : Soil gas probe borings as drawn. on <br /> Lockeford Street as shown. <br /> Ill <br />