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22 April 2002 <br /> AGE-NC Project No 98-0511 <br /> Page 3 of 7 <br /> 2 12 Equipment Decontamination <br /> All probing rods used were cleaned prior to advancement In each probe boring location Sampling <br /> tools and brass sleeves used for sample collection were cleaned as described in section 2 14 <br /> 2 2 QUARTERLY WELL MONITORING PROCEDURES <br /> The quarterly ground water monitoring event was performed on 27 December 2001, ground water <br /> monitoring was performed on monitoring wells MW-1 through MW-8 <br /> 2 2 1 Well Monitoring and Evacuation <br /> A Sollnst water level meter was used to measure the depth to ground water in eight ground water <br /> monitoring wells relative to the tops of the well casings The ground water elevations and gradient <br /> were determined from this data(Table 1) <br /> lie After recording water level measurements,a disposable bailer or a two-stage submersible pump was <br /> used to evacuate each monitoring well of standing water (see Appendix A) Approximately <br /> 10 gallons ofwater were removed from well MW-1,25 gallons from well MW-2 and approximately <br /> 7 gallons from the remaining wells Ground water temperature,pH and conductivity were measured <br /> at regular intervals during the purge process using an Oakton water analyzer Field data sheets are <br /> Included in Appendix A Purged water was stored on-site in labeled, 55-gallon DOT-approved <br /> drums <br /> 2 2 2 Collection and Analysis of Ground Water Samples <br /> Water samples were collected from each purged well using new disposable plastic bailers Each <br /> water sample was transferred Into laboratory-supplied 40-m1 VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a sample preservative After collection, the samples were properly labeled, <br />' placed In a chilled container, transported under cham-of-custody to McCambell Analytical <br /> Laboratories, Inc , and were analyzed for <br /> • TPH-g In accordance with EPA Method 5030/8015M, <br /> • BTEX and MTBE In accordance with EPA method 8021, and <br /> • Fuel oxygenates, Including MTBE, TBA, DIPE, ETBE, TAME, ethanol and methanol in <br /> accordance with EPA Method 8260B <br /> Advanced GeoEnvironmental,Inc <br />