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' 17 January 2005 <br /> AGE-NC Project No 95-0103 <br /> Page 3 of 9 <br /> 1 a Semi-volatile organic compounds (SVOCs) in accordance with EPA Method 625 <br /> (18 February 2004 only), <br /> • Leaking Underground Fuel Tank (LUFT) metals in accordance with EPA Method 6010B <br /> - (18 February 2004 only), <br /> • Copper in accordance with EPA Method 6010B (28 April 2004 only), and <br /> • pH in accordance with EPA Method 150 1 <br /> 23 QUARTERLY GROUND WATER MONITORING AND SAMPLING <br /> As direct by the EHD letter dated 04 October 2004, ground water monitoring and sampling were <br /> performed on monitoring wells MW-1 through MW-6,vapor wells VW-1, VE-1, VE-3 and VE-5, <br /> and air-spargmg wells VW-1/AS and ASO-1 on 18 December 2004 <br /> 2 3 1 Well Monitoring and Evacuation <br /> • A Solinst water level meter was used to measure the <br /> depth to ground water in the wells relative to <br /> p <br /> the tops of the well casings (Table 1) Subsequently, the ground water elevation in each well was <br /> calculated by subtracting the measured depth to ground water from the surveyed casing elevation <br /> After water levels were measured,groundwater(a minimum of three casing water-volumes per well) <br /> were evacuated(purged) from each well A waterra lift-bailer was utilized to purge approximately <br /> 27 gallons of water from well MW-1 Disposable polyethylene bailers were utilized to purge <br /> ' approximately 10 gallon from well VE-3, between 5 5 and 9 5 gallons from wells MW-2 through <br /> MW-6, ASO-1, VE-1/AS, VW-I and VE-1, and approximately 14 gallons from well VE-5 <br /> Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals <br /> from each well using an Oakton water analyzer,the field measurements are included in Appendix B <br /> Purged water was subsequently treated through the on-site ground water treatment system <br /> 2 3 2 Ground Water Sample Collection and Analysis <br /> Water samples were retrieved from each purged well using the dedicated disposable bailers after <br /> allowing the well to achieve a minimum of 80 percent recharge prior to sample collection The <br /> samples were transferred into 40-m1 EPA-approved VOA vials containing 0 5 ml of 18% <br /> hydrochloric acid as a sample preservative The samples were properly labeled and transported in <br /> Advanced GeoEnvironmental,Inc <br />