The complete official site files can be reviewed at:

EPA Region IX
Records Center
Mail Stop SFD-7C
95 Hawthorne Street
Room 403
San Francisco, CA 94105

Local Repository

Valencia Public Library
202 W. Valencia Road
Tucson, AZ 85706

or

Interested parties can review site information in person at the ADEQ Record Center | Learn More >

Site Documents

• Interim Record of Decision (ROD) Amendment (March 2023) | View ROD >
• 5-Year Review (September 2023) | View 5YR >
• Design Report (June 2024) | View Design Report >
• Monitoring Report (October 2025) | View Monitoring Report >
• Fact Sheet (April 2026) | View April FS >
• Focused Feasibility Study (April 2026) | View FS >
• Explanation of Significant Differences (June 2026) | View Explanation >
• Fact Sheet (August 2026) | View Aug. FS >