The Department of Toxic Substances Control (DTSC) has issued a variance to Siddall Construction Inc. to transport treated wood waste from authorized generators and/or handler facilities to disposal facilities. The treated wood waste is generated as a result of Deck and Fence construction. 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-TR-00452, Siddall Construction 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. Without the issuance of the variance, Siddall Construction Inc. would be required to register as a hazardous waste transporter with DTSC and manifest treated wood waste as a hazardous waste prior to disposal at a hazardous waste disposal facility. Siddall Construction Inc. is a deckbuilding company. Under the variance, the authorized transporter may collect treated wood waste from generators and/or handlers and transport it to an authorized handler or disposal site. Operations generally include loading and unloading operations and shipping treated wood waste along existing transportation routes. No accumulation activities are authorized as a part of this variance. The variance will expire on November 15, 2021 with possibility of extension for an additional six months.