Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPIn all three of the cases described above, the following minimum remedial action survey datacollection will take place. A logged GWS will be performed consistent with the FSS protocols (asdefined in the Phase 1 FSSP). If there are indications of surface soil CG exceedances based onscan results, biased samples will be collected from those locations and submitted for quickturnaroundanalysis for Cs-137 and Sr-90. If DOE chooses to remove soils exceeding surface soilCG standards, soil removal will take place and logged GWS combined with biased soil samplingwill be repeated for the affected areas. If DOE chooses not to remove soils or scan/biasedsampling data indicate contamination levels likely meet surface soil CG requirements, one sampleper 200 m 2 area will be collected to a depth of 15 cm and submitted for quick-turnaround analysisfor Cs-137 and Sr-90.In some instances, there may be concerns about subsurface contamination beneath infrastructurethat could not be fully addressed until the infrastructure was removed. In these cases, theminimum remedial action survey data collection described above may be supplemented withvertical soil cores to an appropriate depth, with down-hole bore scans every 15 cm and selectivebiased sampling of specific vertical subsurface soil layers based on scan results. In the case ofbiased sampling, the samples will be submitted for quick-turnaround analyses of Cs-137 and Sr-90.7.4 Excavation EfficacyData will be collected to guide Phase 1 DP soil removal, to support soil segregation for wastedisposal purposes, and/or to verify that the remediation goals for that particular location or areahave been achieved. Details about data collection to support soil removal and to verify thatremediation goals have been met for the deep WMA 1 and WMA 2 excavations are described inSection 7.1. Details about data collection to verify that remediation goals have been met and/or toestablish the contamination status of remaining exposed soils are described in Section 7.3. Detailsabout data collection to support soil segregation for waste disposal purposes may be described ina Phase 1 DP Waste Management Plan developed for this purpose.Rev. 1 59