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' 20 December 2001 <br /> • AGE-NC Project No 98-0497 <br /> 1 Page 2 of 4 <br />' AGE-prepared and PHS--EHD-approved Monitoring Well Installation Work Plan, dated 09 June <br /> 2000 The work was performed to monitor dissolved petroleum hydrocarbon concentrations and <br /> other target contaminants in ground water and to characterize ground water flow direction and <br />' gradient on the site <br />' 3 1 WELL MONITORING AND EVACUATION <br />' On 30 November 2001, a Sohnst water level meter was used to measure the depth to ground water <br /> from the well casing tops in wells MW-1 through MW-3 The depths to ground water are <br /> summarized in Table 1 <br />' After water levels were gauged, a disposable plastic bailer was used to evacuate (purge) each <br /> monitoring well of a minimum of three casing-water volumes (approximately 6 5 to 7 gallons) of <br />' water Temperature,pH, and conductivity were measured at regular intervals using an Oakton water <br /> analyzer The field data sheets are included in Appendix A Purged water was stored on site in 55- <br /> gallon drums <br /> 32 GROUND WATER SAMPLE COLLECTION <br />' Prior to the collection of ground water samples, the depth to ground water was re-measured in each <br /> well to ensure that a minimum. of 80% of the initial water volume had recharged Water samples <br />' were then collected from each well using a clean,disposable plastic bailer The water was transferred <br /> into one 1-liter amber bottle and two chilled 40-m1 volatile organic analysis (VOA) vials containing <br /> 0 5 ml hydrochloric acid(18%) as a sample preservative After collection, the samples were labeled <br />' and placed in a chilled container for transportation under chain-ofcustody to McCampbell <br /> Analytical Laboratories(MAI),a DHS-certified analytical laboratory Each sample was analyzed for <br /> ta TPH-g and TPH-d in accordance with EPA Method 8015 Modified, and <br /> • BTEX and MTBE in accordance with EPA Method 8020 <br />' 4.0. FINDINGS _ <br /> Ground water elevation and flow direction were inferred from field data, hydrocarbon-impact to <br />' ground water was assessed by laboratory analysis of the ground water samples <br />' Advanced GenEnvitonmenhai,Inc <br />