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f Subsurface Investigation Summary Report June 30,2008 i Gubary Liquors,Ripon,CA Page 2 V FIELD WORK L&P supervised the drilling and installation of a single soil boring(SB-1)on June 11,2008. V&W Drilling Inc.(C57-720940)conducted the drilling utilizing a drilling rig equipped with hollow stem augers. John Lane, a California Registered Geologist, supervised the drilling and sampling. V&W drilled soil boring SB-1 (see Figure 2) to a depth of approximately 56 feet using 8-inch diameter, hollow stem augers. Soil samples were collected at 5-foot intervals using a split spoon sampler for soil characterization and possible analyses. Soil samples selected for analysis were sealed with Teflon tape and plastic end caps, labeled, placed in a pre-cooled ice chest, and transported under chain of custody to State certified Argon Laboratories Inc. (FLAP #2359) for analysis. A groundwater sample was collected from the boring after lowering 3/-inch PVC casing into the bore-hole to a depth of approximately 55 feet. The lowermost 5 feet of the casing consisted of machine-slotted PVC screen. Groundwater was retrieved into the appropriate containers using a small diameter PVC bailer,placed in a pre-cooled ice chest,and transported under chain of custody to Argon for analysis. RESULTS OF INVESTIGATION Soil encountered during drilling consisted primarily of poorly graded sand and silty sand from the ground surface to the total depth of the boring (-56 feet bgs), with thin silt layers encountered at approximately 20 and 50 feet bgs. Groundwater was encountered at approximately 55 feet bgs,but subsequently rose to approximately 52 feet bgs after the temporary casing was placed in the bore- hole. A copy of the lithologic log is included as Attachment 1. Soil samples collected from depths of 15, 21, and 55 feet bgs and the groundwater sample were submitted to Argon for analysis of TPHg using EPA 8015M, benzene, toluene, ethylbenzene, xylenes(BTEX)using EPA 8021 B,and oxygenated gasoline constituents as well as lead scavengers using EPA 8260B. No constituents of concern were detected in any soil sample. A copy of laboratory report prepared by Argon Laboratories is included as Attachment 2. RECOMMENDATIONS Based upon analytical results of soil samples collected beneath the USTs at the time of their removal, as well as the results of soil and groundwater samples collected from boring SB-1, L&P recommends that SJC/EHD close the site with No Further Action (NFA) required. Since no contamination was detected in boring SB-1,L&P recommends disposing of soil cuttings at the site by spreading the soil on unpaved portions of the property.