National Oil and Hazardous Substances Pollution Contingency Plan; National Priorities List

The Environmental Protection Agency (EPA) Region 8 announces its intent to delete Operable Unit 10 (OU 10) of the California Gulch Superfund Site (Site) from the National Priorities List (NPL) and requests public comment on this action. The NPL constitutes Appendix B of 40 CFR Part 300, the National Oil and Hazardous Substances Pollution Contingency Plan (NCP), which EPA promulgated pursuant to Section 105 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended. This partial deletion of the California Gulch Site is proposed in accordance with 40 CFR 300.425(e) and the Notice of Policy Change: Partial Deletion of Sites Listed on the National Priorities List, 60 FR 55466 (Nov. 1, 1995). OU 10 includes the Oregon Gulch Tailing Impoundment. EPA issued a Record of Decision (ROD) for OU 10 on August 7, 1997. The Remedial Action was completed on September 26, 1999 and was approved by EPA on September 30, 1999. The EPA bases its proposal to delete OU 10 on the determination by EPA and the State of Colorado, through the Colorado Department of Public Health and Environment (CDPHE), that all appropriate response actions under CERCLA have been implemented at OU 10. The California Gulch Superfund Site was listed on the NPL on September 8, 1983. The Site has been divided into 12, Operable Units (OUs). This partial deletion pertains only to OU 10 of the Site. Response activities will continue at the remaining OUs.