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10 November 1995 AGE-NC Project No. 95-0111 Page 2 of 4 On January 5, 1994, five soil borings were drilled at the site by AST. Three of the borings were completed as two-inch diameter ground water monitoring wells. Laboratory analysis of soil samples from the borings indicated low concentrations of petroleum hydrocarbons in four of the five borings. Impacted ground water was present in samples from two of the three monitoring wells. Ground water samples have been collected x �from each well at the site. Ground water occurs at a depth of approximately 8 feet and the hydraulic gradient was calculated to be toward the north and northeast. 3.0. PROPOSED SCOPE OF WORK To assess the lateral extent of hydrocarbon impacted soil and groundwater at the site, the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) has required further investigation. AGE proposes to drill one boring in the City of Tracy right-of-way (upon approval by the City of Tracy), across Grant Line Road, in the sidewalk, to continue assessment of the impacted soil and ground water. This boring will be completed as a two-inch diameter monitoring well. The proposed locations of the soil borings are illustrated in Figure 2.( 4.0. PROCEDURES To meet the project objectives, the following procedures will be performed: 1) Notify the San Joaquin County Environmental Public Health Services - Environmental Health Division (PHS-EHD) 48 hours prior to commencement of any work. 2) Drill a boring using a truck-mounted drill rig equipped with continuous-flight, 8-inch diameter hollow-stem augers. The boring will be drilled to a depth of 15 feet. The boring locations are depicted on Figure 2. 3) Obtain soil samples at five-foot intervals using a split-tube sampler loaded with three pre- cleaned brass tubes. 4) Preserve soil in the lead brass tube by covering both ends with aluminum foil, capping, and sealing with tape. 5) Label and log soil samples on a chain-of-custody form.