Land Disposal Restrictions: Granting of a Site-Specific Treatment Variance to Dupont Environmental Treatment-Chambers Works Wastewater Treatment Plant, Deepwater, NJ

The Environmental Protection Agency (EPA or Agency) is promulgating a site-specific treatment variance from the Land Disposal Restrictions (LDR) standards for wastewater treatment sludge generated at the Dupont Environmental Treatment (DET)--Chambers Works Wastewater Treatment Plant located in Deepwater, New Jersey. This sludge is derived from the treatment of multiple listed wastes, including K088, and characteristic hazardous waste, and differs significantly from the waste used to establish the LDR treatment standard for arsenic in K088 nonwastewaters. Accordingly, we are finalizing an alternate treatment standard of 5.0 mg/L Toxicity Characteristic Leaching Procedure (TCLP) for the arsenic in the wastewater treatment sludge generated at this facility. This treatment variance requires DET to dispose of their wastewater treatment sludge in their on-site RCRA Subtitle C landfill provided the sludge complies with the specified alternate treatment standard for arsenic in K088 nonwastewaters and meets all other applicable LDR treatment standards.