ARCHIVED REPORTS XR0000689 - Laserfiche WebLink

Home Browse Search

. 19 July 2000 AGE-NC Project No 96-0232 Page 15 of 29 i 7.0. MONTHLY MONITORING AND SAMPLING EVENTS Three monthly monitoring events occurred during the second quarter, 2000 on the following dates, 28 April, 25 and 26 May, and 28 June 2000 7 1 APRIL MONTHLY MONITORING AND SAMPLING EVENT On 28 April 2000, monitoring wells MW-1 through MW-7 were monitored and sampled 7 1 1 Field Procedures Depths to ground water were measured in each well from the tops of the well casings to the nearest 0 01 foot utilizing a Solznst water level meter Ground water elevations in each monitoring well at the site were calculated by subtracting the measured depth to ground water from the surveyed well casing elevations(Table 5) Ground water elevations were plotted and contoured on a scaled site map . (Figure 5) After water levels were measured, approximately 8 to 19 gallons of ground water (a minimum of • three standing water-volumes per well) were removed from wells MW-1, MW-2, MW-4, MW-5, MW-6A, MW-613 and MW-7 utilizing a disposable bailer Temperature, pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using a Hydac 2 water analyzer Field data and logs are included in Appendix F Purged ground water was contamenzed in 55-gallon drums and was stored on-site in an area lacking general public access Following well purging, ground water levels in the monitoring wells achieved a minimum of 80 percent recharge prior to sample collection Ground water samples were collected utilizing new, disposable polyethylene bailers and transferred into laboratory-supplied 1-liter amber bottles without a preservative and 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 Ground water sample collection from Rocky's Restaurant domestic drinking water well (RDW-1), Three B's Truck Plaza domestic drinking water well (DW-1), Flag City municipal water wells No 1 and No 2 (CSA-1 and CSA-2)were achieved by opening the valve from the outlet sample port and allowing the pump to turn on and run for a minimum of 15 minutes to purge the wells prior to • sampling Sample containers and preservation were performed as described above • Advanced GeoEnr tronmental, Inc