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i KL E/NFEL DER <br /> Bright People.Right Solutions <br /> Former Oil AST Location (Location SS3A) <br /> The former oil AST location (as indicated by others previous investigation as SS3A) is <br /> located approximately 150 feet southeast of the Site's northeast corner boundary and <br /> 35 feet south of the property's existing fence line. Soil samples were collected from 3 <br /> locations spaced approximately 5 feet away from SS3A. The sample locations were <br /> north (B-5), southeast (B-6), and southwest (B-7) of SS3A. Soil samples were collected <br /> at depths of 1/2 and 1 foot below the ground surface (bgs) from these 3 borings. <br /> Following the coring of the asphalt, borings were advanced using GeoprobeTM <br /> equipment. The sample locations are shown on Plate 1 . <br /> A total of 6 soil samples were collected. The samples were submitted under chain-of- <br /> custody control to a laboratory approved by the State of California Department of <br /> Health Services for the following requested analyses: <br /> • Total Petroleum Hydrocarbons (TPH) as referenced to diesel (TPH-D), <br /> • TPH as referenced to Motor Oil (TPH-MO), <br /> • Benzene, Toluene, Ethylbenzene, and total Xylenes (BTEX), and <br /> • Fuel oxygenates: MtBE, TAME, ETBE, DIPE, TBA. <br /> The boreholes were closed with neat cement made level with the existing asphalt <br /> surface. <br /> Former Waste Oil Drum Storage Building (Location SS5A) <br /> Location SS5A is the former waste oil drum storage building located near the Site's <br /> northwest corner adjacent to S. Main Street and the railroad easement. The building <br /> wooden plank floor was elevated on piers above bare soil. Soil samples were collected <br /> from 4 locations (B-1 through B-4) within the building. <br /> The first boring (B-1) was advanced to a total depth of 24 feet bgs while collecting soil <br /> samples for lithologic classification and potential chemical analyses at 5, 10, 15, 20, <br /> and 24 feet bgs. Only samples from 5, 10, and 15 feet bgs were selected for laboratory <br /> analyses. A strong, petroleum-like odor was noted when groundwater was encountered <br /> at approximately 19 feet bgs. Qualitative field screening with a photoionization detector <br /> 112884.1/ST010R366R Page 3 of 10 October 1, 2010 <br /> Copyright 2010 Kleinfelder Revision 1, dated November 22, 2010 <br />