Closure Certification for the Central Storage Facility at Mather (formerly Mather Air Force Base) and Addendum to Closure Plan


SCH Number
Lead Agency
Toxic Substances Control, Department of (Department of Toxic Substances Control)
Document Title
Closure Certification for the Central Storage Facility at Mather (formerly Mather Air Force Base) and Addendum to Closure Plan
Document Type
NOE - Notice of Exemption

Document Description
In accordance with State and Federal regulations, the owner/operator of a RCRA permitted facility, must certify compliance with the Closure Plan and provide documentation of its completion. The certification and documentation are submitted in the Closure Certification Report. The project is the Department of Toxic Substances Control's (DTSC's) Closure Certification for the Central Storage Facility (CSF). Closure Certification consists of approval of the March 1996 Closure Certification Report and April 2007 Addendum to Closure Plan. The Report and Addendum provide all the documentation required for closure. Background: DTSC issued a Hazardous Waste Facility Permit for the CSF in December 1990. Air Force flight operations ceased at Mather AFB in early 1993, and the base became permanently deactivated in September 1993. As such, hazardous waste generation has ceased since this time. A Draft Closure Plan was submitted in March 1994. DTSC approved the finalized Closure Plan in May 1995. Closure activities were conducted between July and October 1995. The Closure Certification Report (Report) was submitted to DTSC in March 1996. In a letter dated June 29, 2001, DTSC denied Closure Certification due to deficiencies identified during review of the Report. A February 21, 2002 DTSC letter outlined the requirements and provided technical guidance to complete closure of the CSF. On September 23, 2003, DTSC issued a letter to renew its request for an amendment to the Closure Plan as outlined in the February 21 letter. In response, the Air Force issued an Addendum to the Closure Plan on April 20, 2007.

Contact Information
Fred Fontus
Department of Toxic Substances Control
8800 Cal Center Drive
Sacramento, CA 95826-3200

Phone : (916) 255-3611


Other Location Info
Former Mather Air Force Base

Notice of Exemption

Exempt Status
Type, Section or Code
Reasons for Exemption
General Rule Closure activities are carefully regulated to assure against the potential for any additional environmental concerns. Each of the CSF zones were prepared for decontamination, with particular attention paid to preventing the spread of contamination through the sealing of cracks and holes in buildings and the use of plastic sheeting for ground cover and partial containment walls around the pads and at the open doors of buildings. Closure activities are designed to insure that no units require post closure care, maintenance, and controls. With certainty, no possibility of a significant environmental effect.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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