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1 4 S r 1 i Jl I I ' 23 June 2003 S AGE-NC Project No 00-0769 Page 5 of 13 3 2 QUARTERLY WELL MONITORING ' On 21 and 22 November 2002,ground water monitoring and sampling were performed at 31 ground ' water monitoring wells (MW-1 through MW-9D) Depth to water measurements could not be recorded for monitoring wells MW-7A and MW-9A,the measuring device could not be inserted into the respective chambers II A coordinated effort was made with Are Pump and Welding (1211 Turnpike Road) to conduct , ground water monitoring activities concurrently, the Are Pump and Welding depth to water results ' are included in Appendix F l 3 2 1 Well Monitoring and Evacuation 5 I On 21 November 2002, the depth to ground water was measured at each monitoring well from the top of each well casing to the nearest 0 01-foot utilizing a Solinst water level meter The ground water elevation in each monitoring well was calculated by subtracting the measured depth to ground water from the surveyed casing elevation (Table 2) On 22 November 2002, approximately 7 to 45 gallons of ground water(a minimum of three casing- water volumes perwell)were evacuated(purged)from single-level wells MW-1,MW-2A,MW-2B, MW-3A and MW-3B utilizing disposable polyethylene bailers or a two-stage submersible pump Multi-level monitoring wells MW-4 through MW-9 were purged utilizing a Watera inertial pump, approximately 0 45 to 5 5 gallons of ground water(a minimum of three casing-water volumes per , Well) were purged from the multi-level monitoring wells ! - t Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using an Oakton water analyzer Field data and logs are provided in Appendix F Purged water was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums pending proper disposal 3 2 2 Ground Water Sample Collection and Analysis Ground water samples were collected from wells MW-1, MW-2A,MW-2B,MW-3A and MW-3B ' utilizing new,2-inch diameter disposable polyethylene bailers,groundwater samples were collected from wells MW-4 through MW-9 utilizing 3/8-inch diameter polyethylene tubing Ground water samples were transferred into 40-m1 EPA-approved VOA vials containing 0 5 ml 18%hydrochloric acid as a sample preservative Care was taken to ensure that visible air bubbles were not present in the 'vials after filling and capping Ground water sample containers were labeled with the well designation, date, time, and sampler's initials Advanced GeoEnvironmental,Inc 1