Source Blanks Sample Clauses

Source Blanks. Source blanks are portions of the reagent water used for the final rinse following decontamination. A source blank should be prepared and analyzed for each lot of reagent water used to ultimately prepare equipment rinsate blanks and field blanks. For small sampling events, the preparation and analysis of a source blank may not be necessary. The results of source blank analysis may help in evaluating the effectiveness of decontamination by eliminating analytes present at equivalent concentrations in both the equipment rinsate blank and the reagent water. The source water may be analyzed for th e same parameters as the field samples or may be analyzed for only the parameters that will be used for critical site decisions. If a subset of parameters is proposed, the rationale for the limited source water analyses shall be presented in the facility -specific work plan . The frequency of source blanks should be at a minimum of one sample per each sampling day.