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FARR ASSOCIATES <br /> 3.0 PROPOSED SCOPE OF WORK <br /> Prior to sampling, a survey of the unlabeled drum contents will be completed to assess whether <br /> the drums contain soil, water or other material. A portable HNu photo-ionization detector (PID) <br /> will be used to field screen for volatile organic carbons (VOCs) in the drums. The contents of <br /> each drum will be confirmed, and each drum will be relabeled if necessary. Once the contents of <br /> the drums are known, the drums will be sampled appropriately. <br /> The soil and groundwater samples will be analyzed for total petroleum hydrocarbons as gasoline <br /> (TAH-g by EPA Method 5030), TPH as oil and diesel (TPH-o and TPH-d by EPA Method <br /> 3550/3510), total lead (by EPA Method 7420), and benzene, toluene, ethylbenzene and xylenes <br /> (BTEX by EPA Method 8020). The selection of analytes and analytical methods is based on the <br /> results of historical site soil and groundwater investigation sampling. <br /> 3.1 Sampling of Drummed Material <br /> 3.1.1 Water Samples <br /> Thirteen drums are believed to contain purge water and decon water from previous site <br /> investigations. The water from the 8 drums believed to contain rainwater will be combined into <br /> two to three drums. Representative water samples will be collected from each drum using a <br /> disposable bailer. The water will be placed in clean 40 milliliter vials and 1 liter amber jars. The <br /> jars will then be sealed, labeled and immediately placed in a chilled cooler for transportation to a <br /> laboratory. Proper chain-of-custody procedures will be followed during sample collection and <br /> delivery to the laboratory. <br /> At the tab, unless otherwise specified, samples from the two drums containing groundwater will <br /> be composited. The samples from the drums with suspected rainwater will be composited, as will <br /> the samples from drums containing suspected decon water. The 3 composited samples will then <br /> be analyzed for TPH-g, TPH-o and TPH-d, BTEX, and total lead. If the composite samples yield <br /> concentrations exceeding the City of Stockton Municipal Utility District acceptable levels for <br /> disposal to the municipal sewer system, then the individual samples used in the composite sample <br /> will be analyzed to determine which drum(s) exceed acceptable concentrations. Samples collected <br /> from drums that yielded high HNu readings during field screening will be analyzed individually. <br /> Costs for the additional sampling are not included in this work plan. <br /> 3.1.2 Soil Samples <br /> Twenty-five drums are believed to contain soil. Drums that contain both soil and water will have <br /> the water removed (if possible) and placed in an empty drum. The water will be analyzed as <br /> described above. Twelve of the soil containing drums will be selected randomly. Soil samples <br /> will be collected from each drum. The soil will be placed in clean 4 ounce wide mouth glass jars. <br /> 2 <br /> unionicelproposal.doc <br />