Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPthese sample results indicate the presence of the one or more of those radionuclides at levels ofpotential significance, then the balance of samples from WMA 3 will also be analyzed for theadditional radionuclides that were identified.Table C.1 summarizes the required sample numbers and the estimated number of contingencysamples for WMA 3.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.C.9.9Decision-Making SummaryA summary of decision-making based on the WMA 3 data is as follows:• If GWS data indicate anomalies are present, biased samples will be selected to targetthose anomalies.• If sample results from biased or systematic surface samples for the 15 cm–1 m depthinterval indicate contamination above CG requirements, an additional sample from thatlocation representing the depth interval 1–2 m will be collected and this process repeateduntil contamination is vertically bounded.• For each set of buried infrastructure that is identified as a potential concern, at least threetrenches that uncover the infrastructure will be scanned and sampled. If contaminationappears to extend laterally along the line of the infrastructure, additional sampling willtake place until contamination is bounded.C.10 ReferencesDOE 2004. Solid Waste Management Unit Assessment and Description of Current ConditionsReport, West Valley Demonstration Project, prepared by West Valley Nuclear Services,Co. and URS Group, Inc., prepared for DOE, Ohio Field Office, November 2004.Rev. 1 C-16