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0 <br /> B. Equipment Decontamination <br /> All sampling equipment must be decontaminated before and after each sampling <br /> event. All quality control equipment blank samples must be obtained after equipment <br /> has been thoroughly decontaminated, prior to collecting fluid, sediment or soil samples. <br /> Decontamination procedures should be as follows: <br /> 1. Disassemble equipment <br /> 2. Wash with non-phosphate detergent (alconox) and tap water <br /> 3. Rinse with tap water <br /> 4. Rinse with isopropyl alcohol (use a squirt bottle) <br /> 5. Triple rinse with deionized or distilled water <br /> 6. Rinse with acid <br /> 7. Rinse with certified organic free (HPLC grade) water <br /> C. Quality Assurance/Quality Control <br /> Quality assurance (QA) is the process of assuring that data obtained are <br /> technically sound and properly documented. Quality control (QC) procedures are <br /> employed to measure the degree to which quality assurance objectives are met. The <br /> laboratory is not informed of the existence of field QC samples. <br /> This document is intended to provide guidelines on some of the minimum <br /> requirements necessary to ensure the quality of the data produced during <br /> sampling/analysis activities. The regulated facilities are responsible for the quality of the <br /> data produced, and are expected to provide data of known, documented, and verifiable <br /> quality. <br /> Following is a list of some of the quality control samples which can be employed. <br /> Blanks are a check for cross-contamination during sample collection and shipment and in <br /> the laboratory. Use analytically-certified organic-free (HPLC grade) water for organic <br /> parameters and metal-free (deionized-distilled) water for inorganic parameters. In <br /> general, at least one replicate sample, and one type of blank must be obtained for every <br /> ten field samples. If there are less than ten field sampling points, at least one replicate <br /> sample and one type of blank must be obtained. <br /> 1. Equipment Blanks <br /> Quality control (QC) equipment blanks are used to assess the caliber of field <br /> decontamination procedures. After the sampling equipment has undergone <br /> decontamination procedures, the appropriate (certified metal-free or organic-free) water <br /> 20 <br />