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� N.00 <br /> 4.5 Equipment Rinsate Blank Analyses <br /> Equipment rinsate blanks will not be collected because no equipment coming into contact with <br /> potentially contaminated soil or sediment, wood, or water shall be reused. Dedicated sleeves for <br /> soil and dedicated sampling equipment for wood and sediment sampling shall be used. Disposal <br /> sampling equipment for groundwater sampling shall be used. <br /> 4.6 Field Blank Analyses <br /> Field blanks will be prepared to evaluate if contaminants have been introduced into the samples <br /> during the sampling procedures. Field blanks will be prepared by pouring high performance <br /> liquid chromatography (HPLC) solvent free water (for organics) and deionized water for <br /> inorganics into a sampling container at one of the sampling points. The field blanks that are <br /> collected will be analyzed for RAP volatile organic compounds plus MTBE, CLPAS semivolatile <br /> organic compounds, CLPAS pesticides, CLPAS metals, and RAP petroleum hydrocarbons for <br /> gasoline. These blanks are submitted "blind" to the laboratory, packaged like other samples and <br /> each with its own unique identification number. <br /> 5.0 PROJECT DATA QUALITY OBJECTIVES <br /> 5.1 Data Uses <br /> The data will be used to determine the presence of potential contamination in the subsurface soils <br /> previously occupied by the former freight sheds, storage areas, and upgradient, offsite sources <br /> (existing service station to the west, and former insecticides, pesticide manufacturing and service <br /> station to the south). Sediment samples will be sampled for semivolatiles and metals, (of <br /> particular concern are PCP, cresols, arsenic, and Chromium VI), to determine whether these <br /> constituents are present at elevated levels in the sediments. Representative wood pilings will be <br /> sampled and analyzed for semivolatile organic compounds (particularly for PCP and cresols) to <br /> determine whether wood pilings, if removed, can be disposed in a Class II landfill. Groundwater <br /> will be sampled to determine the possibility of off-site migration of volatiles, semivolatiles, <br /> pesticides, metals, and total petroleum hydrocarbons from potential upgradient sources. <br /> 5.2 Data Quality Indicators <br /> The data quality indicators, precision, accuracy, completeness, representativeness and <br /> comparability, refer to various aspects of the data gathering or sampling activities. In defining <br /> these data quality indicators specifically for the project, the level of uncertainty associated with <br /> each datum is defined. <br /> Accuracy is the degree of agreement of a measurement with a known or true value. To <br /> determine accuracy, a laboratory or field calibration value is compared to the known or true <br /> concentration. The laboratory, by developing a database of instrument runs using performance <br /> samples, will provide information regarding this objective. <br /> m\36210198SAPlwebsap2.wp5 WEBER BLOCK(Area 9) Sampling and Analysis Plan 0 <br /> Page 10 <br />