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Work Plan for Active Soil Gas Sampling February 1997 CAIN ELECTRICAL WORKS 230 North Church Street, Lodi, California 1.0. INTRODUCTION AND SCOPE OF WORK In accordance with the request of Mr. Harry Weber of the Cain Electrical Works, Advanced GeoEnvironinental, Inc. (AGE) has prepared this Work Plan for Active Soil Gas Sampling at 230 North Church Street in Lodi, California (the site). The purpose of this investigation is to detennine if the site is a source of tetrachloroethene (PCE) and trichloroethene(TCL-). The scope of work includes the advancement of soil gas probes to depths of 20 feet below surface grade (bs?). Soil gas samples %will be collectcd from each probe and analyzed on-site by a State-certified laboratory, in accordance with EPA meiliods 8010 and 8020. The location of the site is illustrated on Figure 1 - Location .�fap. A plan of the site is illustrated on Figure 2 - Site Plan. This work plan is prepared in accordance with a request of the Department of Toxic Substances Control (DTSC) and guidelines established by the San Joaquin County Public Health Services - Enviromnental Health Division (PHS-EHD) for subsurface site investigations. 2.0. BACKGROUND 2.1. SITE DESCRIPTION The site is located in a commercial area of central Lodi, California(Figure 1). Lockeford Street is located immediately north of the site; a residence is located immediately south of the site; Church Street is located west of the site; and a residential property is located east of the site. City of Lodi water Nvell number CW-2 is located directly southeast of the site. A single metal-warehouse structure is presently located at the site and is occupied by Cain Electrical Works, a motor and pump repair facility. A slab concrete floor is present throughout most of the stricture; the remaining portions of the property are either asphalt-covered or grass-covered. 2.2. REGIONAL SUBSURFACE PCE AND TCE INVESTIGATION An investigation of PCE and TCE impacted soil and ground water has been ongoing throughout northeast and central Lodi since 1989. PCE and TCE are solvents that were used frequently in dry cleaning processes and as commercial cleaning solvents.