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1,2,3,-Trichloropropane Maximum Contaminant Level
Notices and Announcements
- Click here for the Notice of Proposed Rulemaking for 1,2,3-Trichloropropane (1,2,3-TCP) Maximum Contaminant Level (MCL) Regulations
- Click here for the State Water Resources Control Board (State Water Board) Notice of Public Hearing, Notice of Intent to Adopt a Mitigated Negative Declaration, and Opportunity for Public Comment
- Click here for procedures for the hearing, including limits on speaker time and requirements for submitting power point presentations in advance of the hearing. To ensure a productive and efficient public hearing in which all participants have opportunity to participate, oral comments and any presentations will be limited to no more than three (3) minutes, and may be further limited at the discretion of the Board Chair or any Board member present
Important Dates and Information
The written public comment period for the proposed 1,2,3-TCP MCL regulations will begin on Saturday, March 4, 2017 and end at 5:00 p.m., Friday, April 21, 2017.
The State Water Board will hold a public hearing during which public comments may be made verbally or submitted in writing at 9:00 a.m., Wednesday, April 19, 2017 at the following location:
Coastal Hearing Room
1001 I Street, Second Floor
Sacramento, CA 95814
Additional information regarding the public comment period, including how to request a copy of pertinent documents and how to submit written comments, is provided in the notices linked above.
Description of Proposed Regulations
The primary purpose of the proposed regulations is to adopt a primary drinking water standard of 0.000005 milligrams per liter for 1,2,3-TCP in drinking water, consistent with and meeting the requirements of Health and Safety Code section 116365, and supporting regulations, including setting a Detection Limit for purposes of Reporting and identifying the Best Available Technology.
The proposed regulations will also establish a method for public water systems to substitute existing water quality data to meet initial monitoring requirements under certain conditions.
California Code of Regulations, Title 22, Sections 64444, 64445, 64445.1, 64447.4, 64465, and 64481.
- Notice of Proposed Rulemaking (PDF)
- Text of Proposed Regulations (PDF)
- Initial Statement of Reasons (PDF)
- Initial Statement of Reasons Tables 2-4 (PDF)
- Cost Curves (PDF)
- Economic and Fiscal Impact Statement (PDF)
- Economic and Fiscal Impact Statement Attachment A (PDF)
- Cost Estimating Methodology (PDF)
- Cost Estimating Methodology Tables 1-5 (PDF)
- Master Acronym List (PDF)
California Environmental Quality Act (CEQA) Information
Peer Review Documentation
Major Regulations Documentation
- Standardized Regulatory Impact Assessment (PDF)
- Major Regulations Standardized Impact Assessment Summary (PDF)
- Department of Finance Comments (PDF)
- State Water Board Response to Department of Finance Comments (PDF)
- Department of Finance website
Documents Relied Upon
The documents below are numbered in the order used in the Initial Statement of Reasons. For clarity only the document numbers are provided; please refer to the Initial Statement of Reasons for document dates and titles. Also note that Document 14 is a database that cannot be transmitted electronically; the same data may be obtained from Drinking Water Watch, and a link has been provided in the table below. All documents are in PDF format.
For more information please email DDW at firstname.lastname@example.org or contact:
Office of Chief Counsel
Zachary C. Rounds, P.E.
Regulatory Development Unit
Division of Drinking Water
Conny Mitterhofer, P.E.