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' dedicated pumps installed in accordance with the water yield of each well. Hydraulic <br /> testing will be done to measure the hydraulic conductivity and transmissivity of the <br /> ' water-bearing materials intersected by each well. Water samples will be collected <br /> quarterly and will be analyzed by EPA Method 601 or 624 as appropriate. <br /> A work plan for preparation of a feasibility study will be submitted upon <br /> tcompletion of the remedial investigation. <br /> TASK 5 - REMEDIAL ACTION AT B815 AND GSA <br /> ' We anticipate that agency approval of the feasibility study of the B815 and GSA <br /> will be complete by May 1989, and that remedial action, if required, will begin <br /> immediately. A work plan describing remedial actions will be prepared following <br /> ' completion of the feasibility study. <br /> TASK 6 - FEASIBILITY STUDY AT THE PIT 7 COMPLEX <br /> ' Purpose and Rationale <br /> ' The purpose of this task is to complete a feasibility study of the Pit 7 Complex by <br /> December 1988. Since 1982, LLNL has conducted extensive investigations of soil, rock, <br /> and ground water contamination in the vicinity of the Pit 7 Complex. These investiga- <br /> tions have shown that two overlapping tritium plumes exist in a shallow water-bearing <br /> ' zone; one emanates from Pit 3 and the other from Pit 5. In addition, a smaller plume of <br /> TCE also emanates from Pit 5. The limits of these plumes have been determined. <br /> ' Procedure <br /> To complete a feasibility study of the Pit 7 Complex, LLNL intends to evaluate <br /> ' courses of action with respect to tritium and TCE in soil, rock, and ground water in the <br /> area. <br /> Recommendations will be presented in a Remedial Alternatives Report. <br /> ' Monitoring of the TCE and tritium detected in this area will continue on a quarterly <br /> basis. <br /> ' TASK 7 - REMEDIAL ACTION AT THE PIT 7 COMPLEX <br /> If required, remediation of the Pit 7 Complex will begin in February 1989. A work <br /> plan will be prepared, if required, before implementation of the remediation plans. <br /> tTASK 8 - REMEDIAL INVESTIGATION/FEASIBILITY STUDY AT THE EAST FIRING <br /> AREA/13850 <br /> ' Purpose and Rationale <br /> ' The purpose of this task is to complete the remedial investigation of the East <br /> Firing Area (EFA)/B850 by December 1988. A feasibility study will be completed by <br /> December 1989. In 1984, landfill monitoring wells at Site 300 revealed the presence of <br /> tritium in ground water. The tritium levels were in excess of State of California drinking <br /> ' -7- <br />