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Site Assessment for hlunan - 09/08/97 Pct e 3 of 19 01 to 30 feet - B2 to 20 feet B3 to 20 feet B4 to 23 feet B5 to 21 feet B6 to 17 feet (see Appendix 8 field boring logs). Soil samples were collected for analysis and the boreholes will be backfilled with grout. 2. The soil sampling produced approximately eight, 55 gallon, drums of drill cuttings. The waste soil will be left onsite pending laboratory analysis to be manifested to a legal point of disposal. Soil boreholes were properly backfilled with grout. ' 3. This report was prepared and submitted to the County and the State Regional Board. �.� DY'LGH nc All soil borings were drilled using an 8 inch diameter hollow-stem auger drill rig utilizing a drilling contractor who possessed a C-57 drilling license. All borehole logging was be performed by as State Certified Hydrogeologist who 1 will keep a detailed hydrostratigraphic log of each borehole by noting lithologic changes, hydrogeological characteristics, sample locations and depths, and borehole caving. Groundwater "grab" samples will be collected ' with a steel bailer if groundwater is encountered. Sixteen (23) soil samples were collected, sealed, labeled, and placed in an ice chest at a temperature of four (4) degrees Celsius, and submitted to a State-Certified laboratory, under a proper Chain-of-Custody, to be analyzed for total petroleum hydrocarbons as gasoline (TPH-g) using EPA Method 8015 modified, for Benzene, Toluene, Ethyl benzene, and Xylenes (BTEX) using EPA Method 8020, and for MTBE. Soil samples were also analyzed for TPH(mo) using EPA Method 8015 modified for motor oil ranged organics, for CAM 17 Metals and organic lead by EPA Method 6010, chlorinated solvents and gasoline oxygenates by EPA Method 8260. Three representative samples 1 were collected from the site and analyzed for porosity, moisture content, and bulk wet density. The borings were excavated with an eight (8) inch hollow-stem auger drill, M with 5-foot long sections and soil samples were collected with a two (2) inch inner diameter, three (3) foot long, split spoon sampler at approximate five (5) foot vertical intervals depending upon the soil stratigraphy and rcontaminants encountered. The samples were obtained by the compressive force of a 140 lb hammer dropped from a height of 18 inches. The soil samples were extruded into six (6)-inch long steel sample liners. The liners, with soil, were covered at each end of the cylinder with plastic end caps, and sealed with "duct tape" to adhere the caps to the liner at each end, to hermetically seal the samples. The soil samples were labeled with a non- r