Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAP12.2 Standard Laboratory AnalysesThe second level of laboratory analyses is for off-site laboratory analyses of the ROIs. Table 6 lists the 18ROIs along with the required minimum detectable concentrations. MDC requirements are set towhichever is lower: (1) approximately 10% of the most restrictive radionuclide-specific CG, (2) 25% ofbackground for naturally occurring radionuclides, or (3) standard laboratory MDCs. All laboratoryinstrumentation will be calibrated by using National Institute of Standards and Technology- (NIST-)traceable standards. In addition, the laboratory must be capable of analyzing for the additional 12 ROIs asidentified in Table 3. For these 12 radionuclides, standard laboratory detection limit requirements apply.Laboratory methods, instruments, and sensitivities will be in accordance with New York State protocolsfor environmental analysis. Any laboratory used for environmental sample analysis will have appropriateNew York State Department of Health Environmental Laboratory Approval Program certification or theequivalent. Activity concentrations in soil will be reported in units of picocurie per gram.Groundwater/surface water sample results will be reported in units of pCi/l. Other QC activities areincorporated into specific field survey procedures.Of particular concern for both the on-site and off-site laboratories is the ability of the laboratories toadequately prepare and homogenize soil samples for analysis. Soil sample preparation protocols will bedeveloped and presented as part of the overall standard laboratory operating procedures. The goal of soilsample preparation is that the error introduced by residual within-sample heterogeneity should be no morethan the measurement error associated with the analytical procedure when activity concentrations arearound the relevant CG. Conformance with this goal will be evaluated through the use of replicatesubsampling and analysis of soil samples. The soil samples selected for replicate subsampling andanalysis will be soil samples that exhibit activity concentrations for either Cs-137 and Sr-90 within theimmediate range of the relevant surface soil CG w requirement (i.e., from one half of the surface soil CG wto three times the CG w ).Off-site laboratory analytical quality will be monitored through the use of an independent QC laboratoryand DOE data verification and validation procedures.Rev. 1 90