Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPof this sampling is to bound the extent of contamination associated with buriedinfrastructure, as necessary. [contingent]E.9.7Additional ContingenciesSampling and/or GWS data may indicate that contamination exists or extends beneath surfacescurrently covered by existing structures, concrete, asphalt, or gravel. In this case, “surface soil”will be defined as soil immediately beneath the cover. If sampling or GWS data indicate thatcontamination may exist beneath existing structures (e.g., existing buildings and building pads),then sampling locations will be offset along the foundation edge to determine contaminationextent. The purpose of the offset is to allow safe acquisition of data. Data collection throughbuilding pads and hardstands in WMA 5 will not be required as part of this effort.E.9.8Required Laboratory AnalysesAll samples will be submitted for analysis of all 18 ROI.A select portion of the samples as described above may 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 5 will also be analyzed for the additional radionuclides that were identified.Table E.2 summarizes the required sample numbers and the estimated number of contingencysamples for WMA 5.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.Rev. 1 E-19