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SOP-003 Standard Operating Procedure Equipment Decontamination Procedures <br />Page 3 of 3 Revision No.1 April 2019 <br /> <br />Sharpe Army Depot <br />4.0 Equipment Blanks <br />An equipment blank (EB) is a sample of laboratory grade deionized water poured into or over, or pumped through, the sampling equipment, collected in the appropriate sample container, and analyzed by the laboratory for the same parameters as the field samples. The blanks are used to assess the effectiveness of equipment decontamination procedures. <br />Equipment blank samples may be collected as a method to ensure that decontamination methods are effective and that potential for cross-contamination is minimized. Analytes will be determined based on site-specific conditions and will be chosen to reflect the expected site contaminants. The sampling schedule and procedures for equipment blanks, including frequency, collection method, and analytical suite will be presented in the project-specific Work Plan, QAPP, or similar document, as applicable. <br />5.0 Comments <br />Decontamination is critical for maintaining the integrity of the sampling program. Check equipment carefully prior to sampling, and if there is any doubt about the effectiveness of the decontamination, repeat the decontamination process as an extra precaution. Decontamination fluids will be containerized and disposed of, following the procedures provided in SOP-007, Investigation Derived Waste Management. Decontamination procedures shall be documented in the field logbook.