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' ♦ ^ ' ' L ' ` Y L ' Il i 29 August 2001 AGE-NC Project No 95-0144 ' Page 2 of 7 A 2 1 GROUND WATER EXTRACTION WELL DEVELOPMENT On 13 April 2001 ground water extraction wells EW 1 and EW-2 were developed utilizing a ydisposable plastic bailer and a stainless steel hand bailer, repectively, and a two-stage submersible �/ ump Ground water was purged from each extraction well until groundwater was visually sediment free, I� 60 gallons of water were removed from EW-1 and 20 gallons of water were removed from EW-2 Purged ground water was containerized in properly labeled DOT-approved mode 17H 55-gallon ,`drums and was stored on-site in an area lacking public access Field sheets and.data are included in Appendix A 2 2 'SOIL STOCKPILE SAMPLE COLLECTION AND ANALYSIS Four soil samples were collected from the stockpiled soil generated during the over-excavation'of the former UST No 1 pit by AGE personnel Excavation samples were collected from the stockpile i using a metric-hammer loaded with two, pre-cleaned, 2-mch by 3-inch brass sleeves , Upon collection,the exposed ends ofthe sample sleeve were covered with Teflon sheets, capped and ; sealed with tape Each sample sleeve was then labeled with a unique identification, time, date and sampler's initials Appropriately sealed and labeled samples were placed in a chilled container under ice and transported under cham-of custody to Precision Enviro-Tech (PET) Selected soil samples ' were analyzed for r • Semi-volatile organic compounds (SVOCs) by EPA Method 8270, and • PCBs by EPA Method 8080 ` fi t y 2 3 MONITORING WELL PURGE PROCEDURES f On 21 May 2001, a Solinst water level meter was used to measure the depth to ground water in 15 monitoring wells at the subject site relative to ic grawere erminfrom tops of the well casings The ground water elevations and hydraulic deted m these data(Table 1) 1 Y a , After depth to water measurements were recorded, the wells were purged using submersible purge pumps Monitoring was performed in accordance with the revised monitoring schedule established ' at a 03 April 1998 meeting with the PHS-EHD The purge pumps were decontaminated prior to purging each well by pumping an Alconox solution followed by pumping tap water Approximately y Advanced GeoEnvironniental,Inc 4 t r }