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23 March 2000 <br /> . AGE-NC Project No 96-0232 <br /> Page 8 of 8 <br /> will be continued until field parameter(pH, electrical conductivity, and temperature) readings have <br /> stabilized and purged water Is visually sediment-free <br /> 4 4 GROUND WATER PUMPING ACTIVITIES <br /> A dedicated stainless steel, four-inch diameter Grundfos (Model 5S) submersible pump will be <br /> utilized at the site as part of "pump and treat" interim remediation Ground water will be <br /> continuously pumped from the bottom of the six-inch diameter extraction well at a low-flow rate <br /> between one and five GPM and into a 20,000-gallon above ground storage Baker Tank, dedicated <br /> Solinst Level Logger pressure transducers will be deployed in selected on-site wells to measure <br /> difference in ground water levels before well pumping versus during well pumping <br /> 45 PURGED WATER DISPOSAL <br /> Purged ground water will be containerized in a 20,000-gallon Baker tank, composite "grab" ground <br /> water samples will be collected on a weekly basis from the Baker tank for analysis of total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g), volatile aromatic compounds (BTEX), methyl tertiary <br /> butyl ether(MTBE), tert butanol (TBA), tert-amyl methyl ether(TAME), di-isopropyl ether(DIPS), <br /> ethyl tertiary-butyl ether(ETBE), ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) by <br /> EPA Method 8260B The purged ground water will be transported off-site under non-hazardous <br /> waste manifest to Invirotech, a waste treatment facility located In Roseville, California <br /> • <br /> Advanced GeoEmironmental,Inc <br />