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Report - Soil Boring Installation Page 5 612 N. Buena'Vista Ave. Project No. 480.2 March 9, 2005 3.0 FIELD & ANALYTICAL DATA 3.1 Site Geology and Hydrology Site Geology Observed During Investigation A detailed log was made of the boring. The information noted includes such data ' as sample depths, horizons of detectable contamination (detected by field methods), soil- classification utilizing the Unified Soil Classification System and sediment description (color, texture, composition, hardness, moisture content, ' and post-depositional changes that have occurred in the sediments). The shallow soil encountered during the investigation can broadly be ' characterized as native (undisturbed) silt and clay. The following is an interpretation of the soils observed during the investigation. A copy of the boring log is included in Appendix B. ' Sit o Boring B_1 I to 16'Below Ground Surface {BGS} ' The material in this interval generally consisted of silty clay and clayey silt. A groundwater sample was collected to test for salinity. Soil Boring I to 16'BGS ' The material in this interval generally consisted of silty clay and clayey silt. A groundwater sample was collected to test for salinity. Soil Boring B-3 I to 9'BGS The upper 9 to 10 feet consisted of non-native sand, which was interpreted to be ' pit fill material. The 8-foot sample was stained and exuded a strong gasoline odor. 9 to 12'BGS The material in this interval generally consisted of native silty clay and clayey silt. The 12-foot soil sample was not stained but exuded a strong gasoline odor- It was deemed appropriate to collect a groundwater sample by use of a HydroPunch sampling tool, which was driven to a total depth of 15 feet, then opened and sampled. Groundwater was encountered approximately 8 to 9 feet below grade 2937 Veneman Ave., #B240 Geo-Phase Environmental Inc. Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0295