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i • i QUARTERLY REPORT January 1994 Marlowe Properties 4648 East Waterloo Road Stockton, California 1.0 INTRODUCTION At the direction of Mr Jonathan Marlowe of Marlowe Properties, Geological Audit Services, Inc (GeoAudtt) has prepared this quarterly report of sampling activities at 4648 East Waterloo Road, Stockton, California (the site) This report describes the sampling Iprocedures and presents the results of laboratory analyses I2.0 BACKGROUND 2.1 Site Location The site is located in a flat industrial area east of Stockton, California (Figure 1) A large warehouse, a small office building, two fenced storage yards and a parking/delivery area are present on the site (Figiiie 2) The office is currently vacant, the warehouse is occupied by C V Sports I2.3 Previous Work GeoAudtt was retained by Marlowe Properties to install one groundwater monitoring well in December, 1992, foi the purpose of sampling groundwater in the vicinity of a previously removed underground tank facility No soil contamination was detected in this well, but I Halogenated hydrocarbons and benzene were detected in the water sample from this well in January 1993 The well was sampled again in April of 1993 and slight increases in contaminant concentrations were reported Based on these results, further groundwater I assessment, in the foi m of at least two additional monitoring wells, was required by PHS/EHD I In August, 1993, GeoAudtt submitted a work plan to install two groundwater monitoring I wells and one vadose-zone remediation well The monitoring wells (MW-3 and MW-4)were installed at the site on September 29 and 30, 1993, the vadose-zone well has not yet been Idrilled MW-3 was di filled to a depth of 100 feet, MW-4 was drilled to a depth of 105 feet No TPH of BTE&X contamination was detected in any of the soil samples that were 1 I