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20 May 2004 <br /> AGE-NC Project No 98-0521 <br /> Page 4 of 9 <br /> wells MW-1, MW-3 and MW-4, approximately 215 gallons of water were removed from well <br /> MW-2 and approximately 23 gallons of water were removed from well MW-5 <br /> Temperature,pH and conductivity of the purged water were measured at regular intervals for each <br /> well Temperature, pH and conductivity of the purged water was measured using an Oakton water <br /> analyzer(Appendix D) Purged water was stored on-site in 55-gallon, DOT-approved drums <br /> 4'h Quarter 2003 <br /> On 24 December 2003, a Solinst water level meter was used to measure the depth to ground water <br /> in monitoring wells MW-1 through MW-5 relative to the tops of the well casings After water levels <br /> were measured, each well was purged utilizing a disposable bailer or Waterra inertial pump <br /> Approximately 6 gallons (a minimum of three casing-water volumes) of water were removed from <br /> wells MW-1,MW-3 and MW-4,approximately 23 gallons ofwaterwere removed from well MW-2 <br /> and approximately 24 gallons of water were removed from well MW-5 <br /> Temperature,pH and conductivity of the purged water were measured at regular intervals from wells <br /> . MW-1 through MW-5 Temperature,pH and conductivity of the purged water was measured using <br /> an Oakton water analyzer (Appendix E) Purged water was stored on-site in 55-gallon, DOT- <br /> approved drums <br /> 2 3 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Prior to collection of ground water samples,the depth to ground water was measured again in each <br /> well to ensure that a minimum of 80%of the initial well volume had recharged A water sample was <br /> collected from wells MW-1,MW-3 and MW-4 using a new disposable plastic bailer,a water sample <br /> was collected from the discharge tube in wells MW-2 and MW-5 <br /> For the 3' quarter 2003 sampling event, the samples were transferred into three 40-m1 volatile <br /> organic analysis (VOA) vials containing 0 5 ml hydrochloric acid (18%) as a sample preservative <br /> and one I-liter amber bottle lacking a preservative The samples were then labeled and placed in a <br /> chilled container for transportation under chain-of-custody to McCampbell Analytical Inc (MAI), <br /> a DHS-certified laboratory <br /> For the 4' quarter 2003, the samples were transferred into three 40-m1 volatile organic analysis <br /> (VOA)vials containing 0 5 ml hydrochlonc acid(18%)as a sample preservative The samples were <br /> then labeled and placed in a chilled container for transportation under chain-of-custody to CTEL, <br /> a DHS-certified laboratory <br /> Advanced GeoEnvironmental,Inc <br />