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11 March 2002 <br /> AGE-NC Project No 95-0130 <br /> Page 11 of 13 <br /> mixture will consist of Type I/I1 portland neat cement and not more than 6 gallons of water per <br /> 94-pound sack of cement The grout will be placed by pumping through tremmie pipe A <br /> grouting inspection will be scheduled with SJCEHD personnel <br /> 4 3 WELL DEVELOPMENT <br /> rDevelopment of the proposed ground water extraction and monitoring wells will consist of a <br /> combination of bailing to remove the mayor portion of fine-grained sediment from inside the <br /> I well, surging to flush out or draw in sediment from the filter pack and additional ground water <br /> evacuation(purging) to remove fine-grained sediment Developmental purging activities will <br /> be continued until field parameters (pH, electrical conductivity, and temperature) have <br /> I stabilized and purged water is visually sediment-free Well development will occur no sooner <br /> than 72-hours following well completion <br /> 4 4 GROUND WATER AQUIFER PUMPING TEST <br /> I • A 24-hour ground water aquifer pumping test will be conducted at the site utilizing a Grundfos <br /> submersible pump to induce a decline in static water level in the newly installed ground water <br /> extraction well Pressure transducers will be deployed, at a minimum, in wells EW-1, VW-1, <br /> VW-2, VW-3, MW-1, MW-2, MW-3, MW-5 and MW-8 to measure change in ground water <br /> levels before well pumping versus time during well pumping A constant ground water <br /> pumping rate (approximately 5 gallons per minute) will be utilized from the ground water <br />' extraction well during the aquifer pump test to achieve optimum draw-down influence Results <br /> of the ground water aquifer pumping test will be included in a report of findings and submitted <br /> to the SJCEHD <br /> Grab water samples will be collected at 6-hour intervals an submitted to a DHS-certified <br /> laboratory for the following constituents <br />' a TPH-g in accordance with EPA Method 8015 Modified/5030, <br />' 0 BTEX compounds and MTBE in accordance with EPA Method 8020, <br /> • MTBE, TAME, DIPS, ETBE and TBA by EPA Method 8260 Modified, <br />' 1,2-DCA and EDB by EPA method 8260 Modified, and <br /> • Total lead by EPA Method 7420 <br /> Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented in a <br /> Advanced GeoEnvironmental,Inc <br />