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' Cone Penetrometer Testing and Monitoring Well Installation Report IWATERLOO FOOD &FUEL 3032 East Waterloo Road, Stockton, California ' 1.0. INTRODUCTION AND SCOPE OF WORK ' At the request of Mr Paul Sidhu, Advanced GeoEnvironmental, Inc (AGE), has prepared the enclosed report documenting procedures and results for a cone penetrometer testing (CPT) investigation and for installation of four additional ground water monitoring wells at 3032 East I Waterloo Road, Stockton, California The report documents procedures and results for a subsurface Investigation conducted at the site during April 2001 The four Continuous Multichannel Tubing (CMT)ground water monitoring wells,MW-5 through MW-8,were installed during September and ' October 2001 The site setting is illustrated on Figure 1 Site structures,boring,momtonng well and CPT locations are depicted on Figure 2 The objective of the CPT investigation and CMT well installation was to assess the vertical extent of petroleum hydrocarbons in soil and ground water and to characterize the geological and hydrogeological framework underlying the site This report has been prepared in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigations of underground storage tank(UST)sites A summary of previous Investigations at the �. site and background information was included in the AGE-prepared Interim Remediation and Site Assessment Work Plan, dated 25 January 2001 2.0. PROCEDURES In April 2001 three soil borings (CPT-1, CPT-2 and CPT-3) were advanced on-site utilizing CPT technology to model the geological and hydrogeological framework and to assess the vertical extent of dissolved petroleum-hydrocarbons beneath the site Lithologic data was collected from an initial CPT soil boring in each locality,a twin boring was then advanced immediately adjacent to the initial CPT soil boring to collect soil and grab ground water samples from selected depths Boring logs are presented in Appendix A, a site plan depicting boring locations is presented in Figure 2 In E September and October 2001, four additional ground water monitoring wells were installed to monitor the dissolved hydrocarbons beneath the site and off-site to the east 21 CPT LITHOLOGIC INVESTIGATION Soil bonngs CPT-1, CPT-2 and CPT-3 were advanced vertically to maximum depths of approximately 155 feet below surface grade(bsg), 162 feet bsg and 158 feet bsg,respectively CPT1 was advanced at the western edge of the site, in the down-gradient direction from the UST area, CPT2 was advanced adjacent to the UST release,within the core area of the hydrocarbon-impacted . vadose soil, and CPT3 was advanced along the southern edge of the site, at the furthest southern Point on the site from the UST release, In a cross-gradient location Advanced GeoEnwronmental,Inc