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09 April 2002 <br /> AGE-NC Project No 95-0141 <br /> Page 12 of 13 <br /> I boring unit equipped with 2-inch probing rods The Geoprobe advances soil probe borings using a <br /> hydraulic hammer to drive soil probing rods to specified depths <br /> I The borings will be advanced to depths of approximately 30 feet bsg and completed with 1 5-inch <br /> diameter, schedule 40 PVC well casing placed into the open boring Each well will utilize 15 feet <br /> of slotted well casing (0 020-inch screen size) from 15 to 30 feet bsg A filter pack consisting of <br /> #2112 Lonestar Lapis Luster sand will be poured down the annulus between the well casing and the <br /> boring wall The filter pack will be placed adjacent to the screen from the bottom of the boring to <br /> a point approximately 2 feet above the top of the screen A bentonite seal will be installed from the <br /> top of the filter pack to surface grade Boring locations are illustrated in Figure 2 <br /> All probe borings will be permanently sealed to prevent vertical migration of contaminants Soil <br /> borings shall be abandoned by backfilling with Portland cement from the total depth to surface grade <br /> I4 7 GROUND WATER EXTRACTION FEASIBILITY TESTS <br /> I A submersible water pump will be utilized to induce a decline in static water level in the proposed <br /> extraction well EW-1 Solinst Leveloggers will be deployed in wells EW-1, the two temporary <br /> observation wells and shallow-screened monitoring wells to obtain drawdown measurements at <br /> I 1-minute intervals to measure differences in ground water levels before and during well pumping <br /> In addition, a Solinst water level meter will be used to measure depth to water in the observation <br /> wells at regular intervals <br /> AGE plans to utilize six Levelogger Model 3001 instruments to collect the water level data The <br /> Leveloggers utilize ceramic pressure transducers to measure water levels The devises record the <br /> information during the test and can be downloaded to a computer via an RS232 Optical infra-red <br /> data reader/port connected to the computer <br /> A constant ground water pumping rate for the ground water extraction test will be determined from <br /> the results of the 8-hour pump test and available storage for produced water The ground water will <br /> I be extracted utilizing a submersible, 4-inch diameter Grundfos Rediflow self-priming submersible <br /> pump The ground water pumping rate will be increased at regular intervals to achieve the optimum <br /> pumping rate for the greatest drawdown influence During pumping, the ground water extraction <br /> I flow rate will vary between two and six gallons per minute If the decline of the ground water level <br /> is not satisfactory within the first eight hours of the pilot test, an additional testing will be performed <br /> to achieve sufficient ground water drawdown <br /> Advanced GeoEnvironmental,Inc <br />