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in MW-3- Groundwater samples were collected in September and December 1994. Concentrations of TPH as gasoline was initially detected in MW-1. However, in December 1994, no TPH as gasoline or BTE&X were detected in MW-1. Concentrations of TPH as gasoline and BTE&X were have been detected in both MW-2 and MW-3. However, in all cases, the concentrations have decreased from September to December 1994. 2.4 Groundwater Depth and Gradient Direction The depth to groundwater at the site is approximately 35 to 40 feet. The groundwater gradient is shallow and the general flow direction is east. 3.0 SCOPE OF WORK The extent of impacted groundwater at the site has not been completely assessed. Therefore, GeoAudit proposed to install two additional monitoring wells at the site. The proposed locations of the wells are illustrated in Figure 2. 4.0 PROCEDURES To meet the project objectives, the following procedures will be performed: 1) Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (Prepared by the National Institute for Occupational Safety and Health, Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, October 1985). 2) Notify the San Joaquin County Public Health Services - Environmental Health Division (PHS/EHD) 48 hours prior to commencement of any work. 3) Drill two (2) borings using a truck-mounted drill rig equipped with continuous-flight, 8-inch diameter hollow-stem augers. The borings will be drilled to depths of approximately 55 feet. Boring locations are depicted on Figure 2. 4) Obtain soil samples at five-foot intervals using a split-tube sampler loaded with three pre-cleaned brass sleeves. 5) Preserve soil in the lead brass sleeve by covering both ends with aluminum foil, capping, and sealing with tape. Label and log soil samples on a chain-of-custody form. 2