The Department of Toxic Substances Control (DTSC) has issued a variance to Contra Costa Waste Services, Inc. to The variance allows treated wood waste to be managed under procedures different from, but equally protective to human health and the environment to, the provisions of California Health and Safety Code (HSC) Articles 6, 6.5 and 9 of Chapter 6.5 and California Code of Regulations (CCR), Title 22, Division 4.5, Chapters 12, 13, 14, 15, 16, 18, and/or 20. Under the terms and conditions of Variance TWW-2021-HT-00121, Contra Costa Waste Services, Inc. will ensure the treated wood waste will be appropriately managed. Treated wood waste is a fully regulated California-only hazardous waste because it exhibits the hazardous waste characteristic of toxicity. From 2007 to December 31, 2020, treated wood waste was managed under alternative management standards, established in 22 CCR 67386. The legislation that authorized the alternative management standards for treated wood waste expired on December 31, 2020. Contra Costa Waste Services, Inc., also known as the Recycling Center & Transfer Station, is a transfer station and construction and demolition debris processing facility located in Contra Costa County. Under the variance, the authorized handler may collect and accumulate treated wood waste from generators, transporters, or other handlers. Operations generally include loading and unloading operations. Accumulation of treated wood waste includes taking appropriate precautions to prevent unauthorized access to and prevent leaching to the environment of the treated wood waste. No transportation activities are authorized as a part of this variance. The variance will expire on September 6, 2021 with possibility of extension for an additional six months.