California-new toxicity criteria; see DTSC announcement

Ver batim quotation from the DTSC:

Notice: The Department of Toxic Substances Control Will Hold a Public Workshop to Discuss Proposed Regulations Specifying the Toxicity Criteria for Human Health Risk-Based Screening Levels, Action Levels and Remediation Goals 

The Department of Toxic Substances Control (DTSC) is currently drafting regulations to add Chapter 51.3 to the California Code of Regulations, under Title 22, Division 4.5. This rulemaking proposes to require that any human health risk screening or risk assessment shall use the most protective of the three federal and state accepted toxicity criteria sources for each cancer and non-cancer contaminant of concern for any site in California. 

DTSC will be hosting a public workshop to discuss proposed regulations that would specify toxicity criteria for human health risk-based screening levels, action levels, and remediation goals. The workshop information can be found below in the notice text that was published in the Office of Administrative Law’s Notice Register. This workshop is the first step toward beginning the formal rulemaking process in 2017.  

In addition to this workshop, DTSC would like to extend the opportunity for interested stakeholders and the public to ask questions or provide feedback on this proposed regulation during this informal review period. Comments will be accepted until January 16, 2017. Please note that due to the informal nature of the workshop, responses will not be issued to comments received; however, all comments received before the January 16, 2017 comment period will be considered.  The following is the official information was published in the Notice Register:

Workshop Date: 

December 12, 2016,

1:00 PM – 4:00 PM

Workshop Location: 

DTSC Cal Center Offices

8800 Cal Center Drive

Board Room, 1st floor,

Sacramento, CA. 95826

 

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DTSC has determined that calculating screening levels and cleanup goals from a single source of toxicity criteria does not always provide the best protection to human health. DTSC proposes to require that any human health risk screening or human health risk assessment shall use the most protective of the following three toxicity criteria sources for each cancer and non-cancer contaminant of concern:  

1. Office of Environmental Health and Hazard Assessment Chemical Database, or its successor.  As of November 12, 2015, the database is available online at http://oehha.ca.gov/tcdb/index.asp.  
2. US EPA Integrated Risk Information System (IRIS) database.  As of November 12, 2015, the database is available online at http://www2.epa.gov/iris.
3. Provisional Peer-Reviewed Toxicity Value (PPRTV).  As of November 19, 2015, these values are available online at http://hhpprtv.ornl.gov/quickview/pprtv.php.