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Document Record Detail

Full Document:
RCRA Online Number:13474
To:McCurry, Region 4
Organization of Recipient:EPA
Description: Soil sampling is usually required during land treatment unit closure and post-closure as part of the unsaturated zone monitoring. If the treatment unit is removed as a part of clean-closure, the soil-core monitoring may be suspended at the completion of the closure period. Discusses guidance on intervals for, and duration of, soil sampling during closure and post-closure. There is no EPA-approved methods for determining degradation rates. Closure of a land treatment unit may take up to 360 days. Discussion of closure and post-closure standards for a land treatment units when migration of hazardous constituents has occurred. Discussion of closure standards when groundwater is contaminated at levels below alternate concentration levels specified in a facility permit. The post-closure period for a land treatment unit cannot be terminated until owner or operator has successfully demonstrates that all groundwater at the site is safe for all potential receptors. Discuses addressing migration of constituents of concern outside of the treatment zone during closure versus under corrective action. There are no regulatory provisions requiring corrective action when migratory constituent concentrations exceed regulatory levels of concern in groundwater at an interim status land treatment facility (3008(h)). Discussion of when closure is considered complete.
Regulatory Citation(s) : 264.101, 264.110, 264.113, 264.116, 264.278, 264.280, 265.90, 265.110, 265.113, 265.115, 265.278, 265.280 EXIT disclaimer
Statutory Citation(s):NA Read US Code 42, Chapter 82 EXIT disclaimer
Topic(s):Closure (hazardous waste); Hazardous Waste; Land Disposal Units; Land Treatment Units; Post-closure (hazardous waste); Treatment; TSDFs; Test Methods; Treatment; Permits and Permitting; Cleanup (RCRA); Compliance; Corrective Action (RCRA); Enforcement (RCRA); Hazardous Waste
Approximate Number of Hardcopy Pages:9
EPA Publication Number:NA
RPPC Number (if applicable): 9476.1991(01)
Official OSW Policy:No


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