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Soils observed during the drilling of the three monitoring well borings to a maximum depth of 87 ' feet bgs consisted mostly of massive intervals of clay, silt and fine sand mixtures interrupted by thin (i e, less than five feet thick) intervals of poorly-graded fine sand Laterally continuous sand ' sequences were observed at approximately 15 feet bgs and at 75 to 80 feet bgs Other sand intervals were observed as laterally discontinuous across the site During drilling, saturated sod and groundwater were first encountered between 79 5 and 80 1 feet bgs One week later, the static depth to the groundwater table, as measured in the three ' groundwater monitoring wells, ranged from 77 40 feet bgs in MW-1 to 78 23 feet bgs in MW-3 As such, groundwater does not appear to present under significant confining conditions rThe groundwater surface elevation ranged from a high of 22 64 feet (arbitrary datum) at MW-2 to a low of 22 42 feet (arbitrary datum) at MW-1 The resulting groundwater surface appeared as a regular plane dipping to the north-northeast at a gradient of approximately 0 0037 fooVfoot The monitoring well construction details and groundwater monitoring data are summarized in Table 1 ' The 12 soil samples, three monitoring well groundwater samples, and the domestic water supply well sample collected during the investigation did not contain detectable concentrations of any of 1 0 the gasoline constituent compounds analyzed The groundwater sample analytical data are summarized in Table 2 1 2 4 Sensitive Receptor Survey ' To evaluate possible health and safety impacts from gasoline constituent compounds in soil and groundwater beneath the site, Ramage Environmental surveyed potential sensitive receptors ' within 2,000-feet of the site (site vicinity) The survey included a review of water well completion reports at the California Department of Water Resources (DWR) and a tour of the site vicinity The results of the survey are documented in Ramage Environmental's Sensitive Receptor Survey ' and Groundwater Monitonng Report, First Quarter 2001, dated June 8, 2001 Due to the rural nature of the site vicinity and presence of water wells at each occupied property ' parcel, it is assumed that public water service is not available throughout the area For the site vicinity, only two water well completion reports were on file at DWR In addition to the on-site water supply well, another 15 wells were observed during reconnaissance of the site vicinity All but two of these wells appeared to be operational 0 7