Variance TWW-2021-SG-00530 to Allow the Generation, Accumulation, and Transport of Treated Wood Waste under Alternate Procedures by 10X Genomics


SCH Number
Public Agency
Department of Toxic Substances Control
Document Title
Variance TWW-2021-SG-00530 to Allow the Generation, Accumulation, and Transport of Treated Wood Waste under Alternate Procedures by 10X Genomics
Document Type
NOE - Notice of Exemption
Document Description
The Department of Toxic Substances Control (DTSC) has issued a variance to 10X Genomics to generate and accumulate treated wood waste on-site. The applicant may transport the treated wood waste generated on-site to an authorized handler or disposal facility. The treated wood waste is generated as a result of building demolition. 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-SG-00530, 10X Genomics will ensure the treated wood waste will be appropriately managed. The treated wood waste management activities are part of a existing building demolition to prepare site for construction of a new building. 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, 10X Genomics 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. 10X Genomics is a Biotechnology designs and manufactures gene sequencing technology used in scientific research. Under the variance, the authorized small quantity generator may generate, accumulate, treated wood waste on-site. The generator may transport the treated wood waste generated on site to authorized handler and/or disposal facilities. Operations generally include loading and unloading operations and shipping treated wood waste along existing transportation routes. Accumulation and transport of treated wood waste includes taking appropriate precautions to prevent unauthorized access to and prevent leaching to the environment of the treated wood waste. The variance will expire on November 23, 2021 with possibility of extension for an additional six months.

Contact Information

Kahui Lim
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency


Northern California, San Francisco Bay Area
Other Location Info
1701 Springdale Ave, Pleasanton, CA 94588

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
CCR Title 14, Sec. 15301
Reasons for Exemption
All analysis conducted included the potential extension of the variance for an additional six months. DTSC has determined none of the exceptions to the categorical exemptions apply to this project, as described in Public Resources Code Section 21084(c), (d), and (e), and 14 CCR Section 15300.2. This project consists of the accumulation and storage of the treated wood waste is consistent with the operation, repair, maintenance, permitting, leasing, licensing, or minor alteration of existing public or private structure, involving negligible or no expansion of existing or former use.


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