Emergency Permit for Management of Hazardous Waste, Dionex Corporation, Sunnyvale, California

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 Dionex Corporation, (EPA ID# CAD05539487) to treat hazardous waste through a controlled reaction with chemical solutions. Specifically, one (1) 500-milliliter (mL) container of Butyl Vinyl Ether; one (1) 250-mL container of Ethyl Vinyl Ether; four (4) 500-mL containers and one (1) 100-mL container of Acrylic Acid; one (1) 100-mL container of Borane Tetrahydrofuran; one (1) 500-gram container of 2’,2’-Azobis(2,2-imidazolin-2-yl) propane dichloride; one (1) 500-gram container of 2’,2’-Azobis(2,2-imidazolin-2-yl) propane hydrochloride; one (1) 500-gram container of 2’,2’-Azobis(2,4-dimethyl-4-methoxyvaleronitrile); two (2) 500-gram containers of 2’,2’-Azobis(2-methylpropionile; four (4) 100-gram containers of 4’,4’-Azobis(4-cyanovoleric acid); and one (1) 500-gram container of Benzoyl Peroxide must be stabilized prior to transport to an authorized hazardous waste treatment, storage, and disposal facility. These chemicals are currently being stored at Dionex Corporation located at 1228 Titan Way, Sunnyvale, California 94085. DTSC has determined as a safety precaution to prevent an accident or severe injury, an Emergency Permit should be issued for to chemically stabilize the hazardous waste by Clean Harbors Environmental Services prior to storage and eventual transportation off-site. Background: The containers have peroxide formation present on either the inside, outside, or the bottom of the chemicals’ containers, as well as the thread container caps. The presence of peroxide formation may be unstable at relatively low concentrations, resulting in fire and/or explosion if improperly handled. Also temperature/shock-sensitive materials can decompose or detonate with external energy when dry or concentrated. If the material is improperly handled, there is a potential for a reaction, which includes fire, deflagration, or detonation. Due to the presence of peroxide formation and temperature/shock sensitive chemicals, DTSC considers these chemicals to be an imminent and substantial endangerment to human health and the environment. Chemical stabilization is recommended prior to transport to a permitted treatment, storage, and disposal facility. Project Activities: The treatment of this hazardous waste involves the addition a solution in a controlled manner to reduce the reactive or ignitable characteristics of the chemical. Treatment will take place within a designated exclusion zone. Only technicians from Clean Harbors Environmental Services 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, Dionex Corporation 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 August 3, 2026 and shall expire on October 2, 2026.