Comment Period - Draft Technical Support Document on the Proposed Update of the Public Health Goals for Cis-/Trans-1,2-Dichloroethylene in Drinking Water

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The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is announcing the availability of the draft technical support document for the update of the Public Health Goals (PHGs) for cis-1,2-dichloroethylene (cis-1,2-DCE) and trans-1,2-dichloroethylene (trans-1,2-DCE) in drinking water.  The document proposes an updated PHG of 13 parts per billion (ppb) for cis-1,2-DCE and 50 ppb for trans-1,2-DCE. 

PHG technical support documents provide information on the health effects of contaminants in drinking water.  The PHG is a level of drinking water contaminant at which adverse health effects are not expected to occur from a lifetime of exposure.  The California Safe Drinking Water Act of 1996[1] requires OEHHA to develop PHGs based exclusively on public health considerations.[2]  PHGs published by OEHHA are considered by the State Water Resources Control Board in setting California’s drinking water standards (Maximum Contaminant Levels, or MCLs).[3]

The PHG technical support document, available for download below, provides information on the health effects of cis- and trans-1,2-DCE in drinking water.  OEHHA is soliciting comments on the draft document during a 45-day public comment period.  Written comments must be received at PHG.Program@oehha.ca.gov or at the postal address at the end of this notice by 5:00 p.m. on September 18, 2017 to be considered.  

The Office will hold a public workshop on September 18, 2017 at the California Environmental Protection Agency Headquarters Building, 1001 I Street, Sacramento, California, 95814, Training Room 1 East/West, from 2:00 to 4:00 p.m., or until business is concluded.  OEHHA follows the requirements set forth in Health and Safety Code Sections 57003(a) and 116365 for conducting the workshop and receiving public input.

The workshop is provided to enable a dialogue between OEHHA scientists and the public to discuss the scientific basis of the proposed PHG updates, and to receive comments.  After the public workshop, OEHHA will submit the draft risk assessment for external scientific peer review. 

Following the workshop, public comment period and external scientific peer review, OEHHA will evaluate all the comments received, revise the document as appropriate, and make it available for a 30-day public comment period.  After any subsequent revisions, the final document will be posted on the OEHHA website along with responses to the external peer review comments and to major comments received at the workshop and during the two public comment periods.

If you would like to receive further information on this announcement or have questions, please contact Hermelinda Jimenez at PHG.Program@oehha.ca.gov or at (916) 324-7572.

Written comments on the draft technical support document may be submitted by 5:00 p.m. on September 18, 2017 to PHG.Program@oehha.ca.gov or to:

Pesticide and Environmental Toxicology Branch
Office of Environmental Health Hazard Assessment
California Environmental Protection Agency
P.O. Box 4010, MS-12B
Sacramento, California 95812
Attention: PHG Program

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