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� March 2006 8 053-2442 <br />f• Flush with approximately 5 gallons of low phosphate detergent solution (liquinox or similar); <br />• Flush with tap water to remove detergent solution; <br />� • Flush with distilled water; <br />* Flush with isopropyl alcohol; and <br />• Flush with distilled water. <br />2.4.4 Quality Assurance/Quality Control Samples <br />[ In addition to natural groundwater samples collected under procedures described above, quality <br />� assura�ace/quality control (QA/QC} samples will he collected at the following frequency to allow <br />subsequent data validation: <br />• Rinsate blanks � one per 20 samples; and <br />• Field duplicate — one per 20 samples. <br />Ten percent of the total number of soil and water samples analyzed in the mobile laboratory will be <br />submitted to a fixed laboratory for confirmation analysis. <br />2.5 Vapor Survey <br />� We propose to conduct a limited vapor survey in on-site structures and any utility manways that may <br />be present immediately near the site to ensure elevated concentrations of organic vapors are not <br />present in these spaces. The vapor survey will he conducted by measuring concentrations of "�OCs in <br />ambient air in various confined areas in the basement of the facility, in the First and Second <br />� Additions, and any nearby mauways using a photoionization detector. Tetrachloroethene <br />concentrations in these locations will also be measured using Draeger Tube samplers with detection <br />ranges from 01 to 10 ppm. <br />A soil vapor survey will he completed at the site in the future to determine concentration of organic <br />vapors in the subsurface, both near the source area and above the VOC plume in groundwater. This <br />information will he used to direct future development scenarios for the property. <br />3.0 SAMPLE ANALYSIS AND DATA EVALUATION PROCEDURES <br />All groundwater samples will be analyzed for parameters listed in Table 1. Included in Table 1 are <br />reporting limits for each analyte, sample container, and requisite preservatives. <br />3.1 Data Evaluation <br />Following receipt of laboratory analytical data, results will be evaluated to provide a reasonable <br />assurance that the data are adequate for the intended use. QA review of analyses will he completed <br />for all laboratory data based on the following method-specificcriteria: <br />� • Holding times; <br />• Blanks; <br />* Completeness; <br />� • Precision; and <br />• Accuracy. <br />� <br />� <br />