Laserfiche WebLink
1 l� <br /> ' w <br /> 28 January 2006 <br /> * AGE-NC Project No 95-0121 <br /> Page 4 of 9 <br />' BTEX and MTBE in accordance with EPA Method 8260B, and <br /> Fuel additives MTBE,di-Isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),tertiary- <br /> amyl methyl ether (TAME), tertiary-butyl alcohol (TBA), 1,2-dibromoethane (EDB), and <br />' 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260 B <br />' 23 SECOND QUARTER GROUND WATER MONITORING EVENT <br /> A ground water monitoring event was conducted on 25 and 26 May 2005, ground water monitoring <br /> wells MW-1 through MW-9, vapor wells VW-1 through VW-9, and extraction well EW-1 were <br /> monitored, purged and sampled <br /> 1 ' <br /> 2 3 1 Well Monitoring and Evacuation <br />' A Solinst water level meter was used to measure the depth to ground water in monitoring wells <br /> MW-1 through MW-9, vapor wells VW-1 through VW-9, and extraction well EW-1 from the top <br />' • of the well casings to the nearest 0 01-foot Ground water elevations were calculated by subtracting <br /> the measured depth to ground water from the surveyed casing elevation (Table 3) <br /> After the depth to ground water was measured, between 12 and 18 gallons of ground water (a <br /> minimum of three casing water volumes per well)were evacuated(purged) from monitoring wells <br /> MW-I through MW-7,and 46 gallons of ground water were evacuated from extraction well EW-1 <br /> utilizing a Waterra inertia pump and dedicated plastic tubing Between 1 6 and 7 gallons of ground <br /> water were evacuated from vapor wells VW-1 through VW-9 (excluding VW-8),and 13 gallons of <br /> I ground water were evacuated from MW-9 utilizing a disposable polyethylene bailer The volume of <br /> ground water In VW-8 was too little to be purged A thin layer(sheen)of free product was observed <br /> In VW-1,this was balled off priorto routine purging EW-1,VW-3,VW-4,VW-6,VW-7 and VW- <br />' 9 drew down after purging 46,2 25, 1 6,2 25,2 5, and 2 25 gallons of water,respectively,the wells <br /> were allowed to recharge prior to sampling <br /> Temperature,pH,and conductivity were measured for stabilization at regular purge-volume intervals <br /> using an Oakton water analyzer Field data and logs are included in Appendix B Purged ground <br /> water was containerized in properly labeled, Department of Transportation (DOT)-approved <br /> 55-galldn drums and stored on-site In an area lacking general public access <br /> I <br /> IAdvanced GeoEnvironmentai,Inc <br /> I <br />