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0 Limited Phase II Site Assessment Work Plan TULEBURG TOWING 1075 East Bianchi Road, Stockton, California 1.0. INTRODUCTION At the request of Ms.Louise Northcutt,Advanced GeoEnvironmental,Inc. (AGE)has prepared this Limited Phase II Site Assessment Work Plan for the property located at 1075 East Bianchi Road, Stockton,California(the site).The work is being performed as part of a due diligence for a property transfer.The location of the site is illustrated on Figure 1;a plan of the site is illustrated on Figure 2. This work plan was prepared as required by the San Joaquin County Environmental Health Department (EHD) for the procurement of a soil boring permit, and is in accordance with Appendix A-Tri-Regional Recommendations -Reporting prepared by the Central Valley Regional Water Quality Control Board for the investigation of underground storage tank (UST) sites. 2.0. BACKGROUND The site is located in a commercial/light industrial area of northeast Stockton, San Joaquin County. The property is immediately bound on the south by Bianchi Road,on the west by the Union Pacific Railroad right-of-way, on the north by a vacant lot and on the east by a Stockton Unified School District continuation school. This site is currently operating as an automobile towing and storage yard. The prominent features on the subject property are depicted in Figure 2. 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough; the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys, respectively.The Province is bordered by the Coast Ranges to the west,the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east. The Great Valley has been filled with sediments derived from both marine and continental sources. Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley.The sedimentary formations range in age from Jurassic to Recent,with the older deposits being primarily marine in origin and the younger deposits being primarily continental. Continental-derived sediments were primarily deposited in lacustrine, fluvial,and alluvial environments with sediment sources being the mountain ranges surrounding the valley(Olmsted and Davis, 1961);the site itself is located on unconsolidated and semi-consolidated alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and Geology, 1977).Rocks composing the basement complex of the Province have not been completely defined but are believed to be metamorphic and igneous in origin. Advanced GeoEnvironmental,Inc.