WORK PLANS - Laserfiche WebLink

Home Browse Search

'• 11 March 2002 AGE-NC Project No. 95-0130 ' Page 11 of 13 ' mixture will consist of Type I/II portland neat cement and not more than 6 gallons of water per 94-pound sack of cement. The grout will be placed by pumping through tremmie pipe. A grouting inspection will be scheduled with SJCEHD personnel. 4.3. WELL DEVELOPMENT ' Development of the proposed ground water extraction and monitoring wells will consist of a combination of bailing to remove the major portion of fine-grained sediment from inside the ' well,surging to flush out or draw in sediment from the filter pack and additional ground water evacuation(purging)to remove fine-grained sediment. Developmental purging activities will be continued until field parameters (pH, electrical conductivity, and temperature) have stabilized and purged water is visually sediment-free. Well development will occur no sooner than 72-hours following well completion. 4.4. GROUND WATER AQUIFER PUMPING TEST '• A 24-hour ground water aquifer pumping test will be conducted at the site utilizing a Grundfos submersible pump to induce a decline in static water level in the newly installed ground water extraction well. Pressure transducers will be deployed, at a minimum, in wells EW-1, VW-1, ' VW-2, VW-3, MW-1, MW-2, MW-3, MW-5 and MW-8 to measure change in ground water levels before well pumping versus time during well pumping. A constant ground water pumping rate (approximately 5 gallons per minute) will be utilized from the ground water extraction well during the aquifer pump test to achieve optimum draw-down influence.Results of the ground water aquifer pumping test will be included in a report of findings and submitted to the SJCEHD. ' Grab water samples will be collected at 6-hour intervals an submitted to a DHS-certified laboratory for the following constituents: • TPH-g in accordance with EPA Method 8015 Modified/5030; ' 0 BTEX compounds and MTBE in accordance with EPA Method 8020; • MTBE, TAME, DIPE, ETBE and TBA by EPA Method 8260 Modified; ' 1,2-DCA and EDB by EPA method 8260 Modified; and • Total lead by EPA Method 7420. Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality • control (QA/QC) reports, and sample chain of custody documentation will be presented in a Advanced GeoEnviroomental,Inc.