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Report on Soil and Ground-Water Evaluation September 11, 1989 <br /> Proposed ARCO Station, Woodbridge, California AGS 39044-1 <br /> was placed into 55-gallon drums approved by the Department of Transportation and <br /> temporarily stored onsite pending receipt of laboratory analyses,-which will be used to <br /> evaluate disposal options. <br /> - <br /> After purging, ground-water samples were collected from each monitoring well by lowering <br /> a clean Teflon bailer just past the air-water interface. The bailer was then recovered and <br /> the sample transferred to . two laboratory-cleaned,= 40-m1 glass vials. Concentrated <br /> �r hydrochloric acid was added to each of the vials- as-a preservative. The sample containers <br /> were then labeled and promptly placed in iced storage: Chain of Custody Records were <br /> initiated by the field geologist and accompanied the samples to the analytical laboratories. <br /> Copies of those records are included in the Appendix to this report. <br /> ANALYTICAL METHODS AND RESULTS <br /> Soil Samples - <br /> The soil samples collected-from immediately above the ground-water surface in each boring <br /> were selected for chemical analysis. These samples were analyzed for total petroleum <br /> hydrocarbons (TPH) as gasoline using modified Environmental Protection Agency (EPA) <br /> Method 8015 and benzene, toluene, ethylbenzene, and total xylene isomers (BTEX) by <br /> EPA Method 8020. The samples-were analyzed at the Applied GeoSystems Laboratory in <br /> fr. _ <br /> - 16 <br /> Applied GeoSystems <br />