California Code of Regulations › Title 22 - Social Security › Division 4.5 - Environmental Health Standards for the Management of Hazardous Waste › Chapter 51 - Site Remediation › Article 2 - Toxicity Criteria for Human Health Risk Assessments, Screening Levels, and Remediation Goals › Section 69021 - Applicable Toxicity Criteria

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Consistent with Health and Safety Code section
					 25356.1.5,
					 all human health risk assessments, human health risk-based screening levels,
					 and human health risk-based remediation goals used for the cleanup of sites
					 described under section
					 69020, subdivision (b), shall use
					 the cancer and non-cancer toxicity criteria for each COPC from the following
					 sources in the order listed below:
(a)
				  The OEHHA peer
-
reviewed unit risk factors, oral slope factors,
				  chronic reference exposure levels, reference dose(s) (RfDs), and blood lead
				  value
s
in Table A and B of Appendix I to this Chapter, shall
				  be used for the COPCs that are listed in that Appendix, so long as the Appendix
				  I values remain no less stringent than toxicity criteria available from the
				  source in subdivision (b) below. If Appendix I does not list toxicity criteria
				  for a specific COPC or contains a value that is less stringent, then the
				  toxicity criteria listed under section
				  69021, subdivision (b) shall be
				  used.
(b) The
				  peer
-
reviewed unit risk factors, oral slope factors, RfDs, and
				  reference concentrations, in IRIS shall be used where either Appendix I does
				  not specify toxicity criteria for a particular COPC, or the IRIS toxicity
				  criteria value is more stringent than the value listed in Appendix I. If
				  neither Appendix I nor IRIS lists toxicity criteria for a specific COPC, then
				  the toxicity criteria listed under section
				  69021, subdivision (c) shall be
				  used.
(c) Toxicity criteria from
				  another source, that applies the best available science and is health-based,
				  may be used in human health risk assessments upon approval by the Supervising
				  Toxicologist, of the Department's Human and Ecological Risk Office, or his or
				  her designee, when neither subdivision (a) nor subdivision (b) above specifies
				  toxicity criteria for the particular COPC. Other sources include, but are not
				  limited to: OEHHA toxicity criteria that are not listed in Appendix I (e.g.,
				  those toxicity criteria used in U.S. EPA's Regional Screening Levels), U.S. EPA
				  Provisional Peer Reviewed Toxicity Values (PPRTVs), Agency for Toxic Substances
				  and Disease Registry Minimal Risk Levels, PPRTV Appendix Screening Toxicity
				  Values, and U.S. EPA Superfund Health Effects Assessment Summary Table values.
				  However, use of TPH PPRTVs is not required, but may be determined to be
				  appropriate based on site-specific circumstances. Any selected toxicity
				  criteria or value used under this subdivision shall be consistent with Health
				  and Safety Code section
				  25356.1.5,
				  subdivisions (b) and (c).
1. New
					 section and Appendix I filed 9-4-2018; operative 9-4-2018 pursuant to
					 Government Code section
					 11343.4(b)(3)
					 (Register 2018, No. 36).
Note: Authority cited: Sections
						25150,
						25159,
						25159.5,
						25351.5,
						25395.64,
						25395.71,
						25395.92,
						58004
						and
						58012,
						Health and Safety Code. Reference: Sections
						25150,
						25159,
						25159.7,
						25187,
						25355.8,
						25356.1,
						25356.1.5,
						25395.92
						and
						25395.94,
						Health and Safety Code; Section
						71110,
						Public Resources Code; and Section
						300.430 of Title 40 of the Code of
						Federal Regulations.