Emergency Permit for Management of Hazardous Waste, GKN Aerospace Transparency Systems Inc., Garden Grove, California
Summary
SCH Number
2026100977
Public Agency
California Department of Toxic Substances Control
(DTSC)
Document Title
Emergency Permit for Management of Hazardous Waste, GKN Aerospace Transparency Systems Inc., Garden Grove, California
Document Type
NOE - Notice of Exemption
Received
Posted
10/26/2026
Document Description
Project Description:
The California Department of Toxic Substances Control (DTSC), pursuant to authority granted under California Code of Regulations (CCR), Title 22, Division 4.5, Chapter 20, Sec. 66270.61, has issued an Emergency Permit to the GKN Aerospace Transparency Systems Inc. (EPA ID# CAD009578162) to treat hazardous waste through a controlled reaction with two inhibitors. Specifically, approximately 11,500 gallons of Methyl Methacrylate (MMA) must be stabilized prior to transport to an authorized hazardous waste treatment, storage, and disposal facility. The treatment of the hazardous waste involves the controlled addition of an inhibitor solution to reduce the reactive or ignitable characteristics of the chemical. The inhibitor solution will consist of a mixture of MMA and either Monomethyl Ether of Hydroquinone (MEHQ) or Phenothiazine (PTZ). The treatment of hazardous waste applies to: (1) residual MMA encountered during ongoing work on the piping systems associated with the MMA storage tanks; (2) acetone and MMA-containing waste generated through cleaning of those piping systems; and (3) MMA process waste generated when GKN resumes manufacturing operations. The hazardous waste will be transferred to either 55-gallon drums or stainless-steel intermediate bulk containers where treatment will be conducted. Acetone will be used to wash the internal surfaces of the piping to remove residual MMA and MEHQ or PTZ. The acetone waste will be added to the 55-gallon drums or stainless-steel intermediate bulk containers.
This chemical is currently being stored at GKN Aerospace Transparency Systems Inc. located at 12122 Western Avenue, Garden Grove, California 92841. DTSC has determined as a safety precaution to prevent an accident or severe injury, an Emergency Permit should be issued to chemically stabilize the hazardous waste prior to storage and eventual transportation off-site.
Background:
The MMA chemical identified is sensitive to polymerization. Instability can be introduced as the chemical and/or storage container is exposed to heat, light, or contaminants. Chemical stabilization is recommended prior to transport to a permitted storage, treatment, and disposal facility.
Project Activities:
The treatment of this hazardous waste involves the addition of an inhibitor to the chemical in a controlled manner to reduce the reactive or ignitable characteristics of the chemical. Treatment will take place within a designated exclusion zone. Only qualified technicians will be allowed in the exclusion zone. Movement, preparation, and treatment of the containers will be in accordance with established standards.
Within 10 business days of the expiration of this permit, GKN Aerospace Transparency Systems Inc. will submit a final report, signed in accordance with Title 22, CCR Sec. 66270.11(d). The report shall include certification that the treatment area has been cleared of all residual hazardous waste generated from this emergency treatment and all generated waste has been properly managed. The Emergency Permit is effective beginning October 26, 2026 and shall expire on January 24, 2027.
Contact Information
Name
Roger A. Hardy
Agency Name
GKN Aerospace Transparency Systems, Inc.
Job Title
Site Director & VP of Operations
Contact Types
Project Applicant / Parties Undertaking Project
Phone
Name
Parisa Khosraviani
Agency Name
Department of Toxic Substances Control
Job Title
Hazardous Substances Engineer
Contact Types
Lead/Public Agency
Phone
Location
Cities
Garden Grove
Counties
Orange
Regions
Southern California
Other Location Info
12122 Western Avenue, Garden Grove, California 92841
Notice of Exemption
Exempt Status
Emergency Project
Type, Section or Code
Sec. 21080(b)(4); 15269(b)(c)
Reasons for Exemption
This action is necessary to prevent an emergency. Chemical stabilization of the chemical is necessary prior to transportation to an authorized hazardous waste treatment, storage, and disposal facility to prevent accidental fire and/or explosion during transport. The addition of inhibitor is necessary to prevent uncontrolled polymerization and to ensure the safe accumulation, storage, and transportation of the affected wastes.
County Clerk
Orange
Attachments
Notice of Exemption
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