Laserfiche WebLink
Groundwater Monitoring Plan <br /> • Field Q A,I QC procedures - reni,ir-ed to demonstrgte sample integrity;it includes field <br /> decontamination procedures to prevent cross-contamination, the collection of field <br /> blanks (non-disposable sampling equipment), and the collection of duplicate samples <br /> during each sampling activity; <br /> ■ Name and location of laboratory -required for chain-of-custody documentation and to <br /> verify credentials of laboratory; <br /> ■ Analytical methods - required to assess appropriateness and acceptability of analytical <br /> method used; <br /> ■ Detection limits - required to assess the lower limit of parameter identification; <br /> ■ Holding times, and dates of extraction, analysis and preservation -required to assess <br /> whether the samples were extracted and analyzed within the holding time required; and <br /> ■ Laboratory QA/QC procedures - required to assess analytical accuracy and sample <br /> integrity. Spikes, duplicates, method blanks, and surrogates for each analytical batch will <br /> be analyzed by the laboratory at appropriate frequencies for each test method under SW- <br /> 846. <br /> Analytical data may be qualified based on data verification reviews. Qualifiers will be consistent with <br /> the applicable U.S. EPA functional guidelines and will be used to provide data users with an estimate <br /> of the level of certainty associated with the result"flagged". <br /> 3.8 Equipment Decontamination and Waste Containment <br /> Non-disposable sampling equipment will be decontaminated between samples by the following <br /> three-stage decontamination process: <br /> ■ Washing with a non-phosphate detergent, <br /> ■ Rinsing in tap water, and <br /> • Rinsing twice with distilled water. <br /> Drilling equipment will be decontaminated with a high-pressure washer. <br /> Decontamination fluids and development water will be stored in appropriate containers. Drill <br /> cuttings will be placed in 55-gallon steel drums or a roll-off bin. The drums and storage containers <br /> will be labeled with the generator name, site address, description of the contents, and generation <br /> date. Investigation-derived waste will be stored on-site pending analytical results and will be <br /> disposed of properly. Investigation derived wastewater may be utilized in the facility's production <br /> process as a disposal method prior to receipt of analytical results. <br /> p:\wp\lobs\20587\CAO Get'Workplan doc—DCN 12495 January 2002 <br />