Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPI.9.8Required Laboratory AnalysesAll samples will be submitted for analysis of all 18 ROI.A select portion of the samples as described above will be analyzed for the additional12 radionuclides of potential interest. If these sample results indicate the presence of the one ormore of those radionuclides at levels of potential significance, then the balance of samples fromWMA 10 will also be analyzed for the additional radionuclides that were identified.Table I.2 summarizes the required sample numbers and the estimated number of contingencysamples for WMA 10.This sampling plan assumes that quick turn-around analyses are available for Sr-90 and Cs-137and that soil samples will be screened for Sr-90 and Cs-137 prior to being analyzed for thebalance of the ROI. Contingency sampling requirements as described above may be undertakenbased on these screening data.I.9.9Decision-Making SummaryA summary of decision-making based on the WMA 10 data is as follows:• If buried infrastructure of concern is identified (in addition to the main storm sewer line),then biased locations will be selected, excavation conducted to expose the line, and atleast one biased sampled collected. If contamination is encountered above surface soilCG w requirements, sampling will continue along these lines until it is bounded.• Backfill associated with the main storm sewer line will be sampled. If contamination isencountered above surface soil CG w requirements, sampling will continue along the mainline until contamination is bounded.• The WMA 10 surface soil area classification as contained in Figure I.15 will be adjustedbased on GWS results. These adjustments may affect systematic sample numberrequirements and will affect the placement of the initial round of systematic samplelocations.Rev. 1 I-16