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Phase II Site Assessment Work Plan BLINCO TRUCKING 2431 East Mariposa Road, Stockton, California 1.0. INTRODUCTION At the request of Mr. Greg Smith of BJJ Trucking Company, LLC, Advanced GeoEnvironmental, Inc. (AGE) has prepared this Phase 11 Site Assessment Work Plan for the property located at 2431 East Mariposa Road, Stockton, San Joaquin County, California (site). The scope of work includes advancement of up to ten (10) soil probe borings for the collection of soil samples to evaluate and define the type or extent of petroleum hydrocarbon-impacted soil between 5 and 20 feet below surface grade (bsg). The work plan provides a description of the scope of work and procedures to be used for soil boring advancement, sample collection and analysis; and boring abandonment. The subject property is located within a mixed use (light industrial, commercial and residential) area of unincorporated San Joaquin County, south of the City of Stockton, California. Figure 1 shows the setting of the subject property (7.5 Minute United States Geological Survey [USGS] Topographic Series, Stockton East, California). On-site structures and proposed boring locations are illustrated in Figure 2. The subject property is located along the south-southwest side of East Mariposa Road and west-southwest side of the Highway 99 Frontage Road, in unincorporated San Joaquin County, south of the City of Stockton, California. Highway 99 is located approximately 500 feet east of the property. The property comprises seven parcels, totaling approximately 16.07 acres. The work plan was prepared as required by San Joaquin County Environmental Health Department (SJCEHD) to procure a soil boring permit, for investigation of underground storage tank (UST) sites. 2.0. BACKGROUND A review of records for subject property address 2431 East Mariposa Road at the SJCEHD revealed the presence of four USTs: One, approximately 1,000-gallon, waste oil UST was removed from the property in September 1989; one 3,500-gallon diesel UST was abandoned in place in 1990, was located partially under the former paint shop building, and was the subject of a LUST investigation that was closed in 1997; and two active 12,000-gallon diesel USTs located northwest of the 'Old Office' building. Two dispensers are located above the USTs. Advanced GeoEnvironmental Inc.