SITE INFORMATION AND CORRESPONDENCE

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Phase II Limited Subsurface Investigation WARNER PROPERTY 520 North EI Dorado Street, Stockton, California INTRODUCTION The subject property is located at 520 North EI Dorado Street, Stockton, California, on the northeastern corner of the intersection of East Fremont Street and North EI Dorado Street. The subject property is a 0.780-acre, square-shaped parcel developed with an approximately 11,220 square foot building. The western portion of the building is single- story while the eastern portion of the building has two stories. Currently, the property is unoccupied. The location of the subject property is depicted in Appendix A, and prominent features on the subject property are depicted in Appendix B. Historical occupancy research of the property identified the site as the former location of a gasoline station and, prior to the 1950s, a tannery. No records were identified that indicated any investigation had been performed at the site; either for the gasoline station or the tannery. SOIL PROBE BORING ADVANCEMENT On 10 November 2011, six soil borings (B1 through 136) were advanced at the subject property, under San Joaquin County Environmental Health Department (SJCEHD) Permit SR# 63855. A copy of Permit SR# 63855 is provided herein. Borings 131 through 133 were advanced in the parking lot in the southwestern portion of the property, and borings 64 through B6 were advanced along the eastern property boundary. Approximate boring locations are shown on the Site Plan provided in Appendix B. The soil borings were advanced to depths of approximately 20 feet (B2, B3 and B5) and 30 feet (131, B4 and B6) below surface grade (bsg), utilizing a CME 75 truck-mounted drill rig to drive 1.25-inch diameter probing rods and sampling tools to specified depths. The drill rig and two-person crew were supplied by All Well Abandonment, of Diamond Springs, California. Soil cuttings generated by drilling were containerized in properly labeled Department of Transportation (DOT)-approved model 17H 55-gallon drums and were stored on-site. SOIL SAMPLE COLLECTION Continuous soil samples were collected in 4-foot intervals using a 1.5-inch diameter macro-core sampling assembly loaded with one 4-foot acetate liner. After collection, the ends of a separated, 6-inch portion of the acetate liner were covered with Teflon sheets, capped and sealed with tape. The sleeve was labeled with soil boring location, depth, time, date and sampler's initials and then placed in a chilled container. Soil samples were Advanced Gcu Envirunmental,Inc.