Post-closure Groundwater Monitoring Plan for the 1324-N Surface Impoundment and 1324-NA Percolation Pond PDF Download
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Languages : en
Pages : 0
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Languages : en
Pages : 0
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Author: Mary J. Hartman
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Languages : en
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Languages : en
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This document presents groundwater monitoring plans for four Resource Conservation and Recovery Act of 1976 (RCRA) hazardous waste sites: the 1301-N Liquid Waste Disposal Facility (LWDF), the 1325-N LWDF, the 1324-N surface impoundment, and the 1324-NA percolation pond (1324-N/NA site). This monitoring plan is based on requirements for interim-status units, as defined by the RCRA and amended by the Hazardous and Solid Waste Amendments of 1984. These regulations are promulgated by the U.S. Environmental Protection Agency (EPA) in 40 Code of Federal Regulation (CFR) 265, Subpart F, as implemented by the Washington State Department of Ecology in Washington Administrative Code (WAC) 173-303-400. All of the sites are currently monitored under indicator evaluation programs (40 CFR 265.92). Final status monitoring programs will be initiated for the 100-N RCRA sites when they are incorporated into the Hanford Site RCRA Permit (Ecology 1994). This is scheduled for 1998 for the 1324-N/NA sites and for 1999 for the 1301-N and 1325-N sites. Post-closure plans are currently being prepared by the Environmental Restoration Contractor.
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Languages : en
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The 1301-N and 1325-N Liquid Waste Disposal Facilities, the 1324-N Surface Impoundment, and the 1324-NA Percolation Pond, located in the 100 N Area of the Hanford Site, are regulated under the Resource Conservation and Recovery Act of 1976 (RCRA). The closure plans for these facilities stipulate that groundwater is monitored according to the 100-N Pilot Project: Proposed Consolidated Groundwater Monitoring Program (BHI-00725). This document supplements the consolidated plan by providing information on sampling and analysis protocols, quality assurance, data management, and a conceptual model for the RCRA sites. Monitoring well networks, constituents, and sampling frequency remain the same as in the consolidated plan or the previous groundwater monitoring plan (Hartman 1996).
Author: Mary J. Hartman
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Category :
Languages : en
Pages : 11
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Author: Bruce A. Williams
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Languages : en
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Author: Bruce A. Williams
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Languages : en
Pages : 5
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During 2003, the upgradient well 299-W26-7 went dry and one new groundwater monitoring well was installed downgradient (well 299-W26-14) of the 216-S-10 pond and ditch. This ICN updates the groundwater monitoring wells for the 216-S-10 pond and ditch and adds a revised well location map to the plan.
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Languages : en
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The 216-B-3 Pond was a series of ponds for disposal of liquid effluent from past Hanford production facilities. In 1990, groundwater monitoring at B Pond was elevated from "detection" to assessment status because total organic halides and total organic carbon were found to exceed critical means in two wells. Groundwater quality assessment, which ended in 1996, failed to find any specific hazardous waste contaminant that could have accounted for the isolated occurrences of elevated total organic halides and total organic carbon. Hence, the facility was subsequently returned to detection-level monitoring in 1998. Exhaustive groundwater analyses during the assessment period indicated that only two contaminants, tritium and nitrate, could be positively attributed to the B Pond System, with two others (arsenic and I-129) possibly originating from B Pond. Chemical and radiological analyses of soil at the main pond and 216-B-3-3 ditch has not revealed significant contamination. Based on the observed, minor contamination in groundwater and in the soil column, three parameters were selected for site-specific, semiannual monitoring; gross alpha, gross beta, and specific conductance. Total organic halides and total organic carbon are included as constituents because of regulatory requirements. Nitrate, tritium, arsenic, and iodine-129 will be monitored under the aegis of Hanford site-wide monitoring. Although the B Pond System is not scheduled to advance from RCRA interim status to final status until the year 2003, a contingency plan for an improved monitoring strategy, which will partially emulate final status requirements, will be contemplated before the official change to final status. This modification will allow a more sensible and effective screening of groundwater for the facility.
Author: Douglas B. Barnett
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Languages : en
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Author: United States. Office of Solid Waste Management Programs
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Category : Drinking water
Languages : en
Pages : 60
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