Conceptual Site Model - Argonne National Laboratory

WVDP Phase 1 CSAPcounts per second). Electronically logged data will be organized and files will be named in amanner that facilitates matching data files with specific areas. Different types of surface cover(e.g., exposed soils versus hardstand material versus asphalt versus compacted roads) will not bemixed in the same data file.• Soil moisture conditions for areas surveyed will be determined using an appropriate soil moisturemeasurement technique (e.g. Troxler gauge).• Areas that cannot be surveyed for whatever reason will be clearly demarcated electronically bywalking the perimeter of the inaccessible area with a coordinate logging system such as a GPSand noting the reasons for inaccessibility in field notebooks.• For each area surveyed, field notebook notations will be made. The notations will include thedate, a description of the area, the type of surface cover, the purpose of the survey, the name ofthe file(s) containing the logged data, soil moisture conditions, the name of the technician, thedetector identifier, the form of coordinate capture used, and any pertinent meteorologicalinformation. Different types of surface cover will not be mixed in the same logged file.11.5 Quality Control and Quality AssuranceThe following activities represent the minimum QC/QA requirements for gross gamma activity surveys.In several cases control charts are used to monitor detector performance. In general, control charts will bedeveloped by obtaining sequential detector readings sufficient to develop average responses and toestimate the variability associated with those responses. The variability, as measured by the standarddeviation, will be used to construct two and three standard deviation error bars for the control charts. Asdescribed in the subsequent bullets, one or more daily controlled measurements would be obtained andadded to the control charts. Daily readings that are more than two standard deviations away from themean response would require a second measurement. If the second measurement also is more than twostandard deviations away from the mean response or the initial measurement was more than threestandard deviations from the mean response, the detector would be evaluated for evidence of potentialproblems and corrective actions taken as necessary before routine use of the detector is resumed.Rev. 1 85