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 69020 - Applicability and Purpose

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
				  This Chapter applies to the cleanup (e.g., response or remedial action) of
				  releases of hazardous waste or hazardous waste constituents, hazardous
				  materials, and hazardous substances (collectively, hazardous substances) to the
				  environment that are subject to the provisions of Health and Safety Code,
				  Division 20, Chapters 6.8 and 6.82. Section
				  69021 specifies the required
				  toxicity criteria for use in setting all human health risk-based screening
				  levels and human health risk-based remediation goals, and in all human health
				  risk assessments for those sites.
(b) The purpose of this Chapter is to
				  establish toxicity criteria, consistent with Health and Safety Code section
				  25356.1.5,
				  for all human health risk assessments, human health risk-based screening
				  levels, and human health risk-based remediation goals statewide, approved after
				  the effective date of this Chapter. This Chapter does not replace applicable
				  Maximum Contaminant Levels (MCLs) established under Health and Safety Code
				  section
				  116365
				  or Title 42 United States
				  Code section 300g as remediation
				  goals.
(c) Terms used in this
				  Chapter shall have the following meanings:
(1)
				  "Contaminant of Potential Concern" (COPC) is a chemical or contaminant at or
				  from the Site that is identified as a potential threat to human health or the
				  environment, and whose site-specific data are of sufficient quality for use in
				  any risk assessment.
(2)
				  "Department" means the California Department of Toxic Substances
				  Control.
(3) "IRIS" means the
				  United States Environmental Protection Agency's (U.S. EPA's) Integrated Risk
				  Information System identified in the U.S. EPA Office of Solid Waste and
				  Emergency Response Directive Number 9285.7-53 (December 5, 2003, at page 3),
				  for the unit risk factor, oral slope factor, reference dose, and reference
				  concentration values in this U.S. EPA IRIS database, available online at
https://www.epa.gov/iris
, as it
				  may be updated.
(4) "OEHHA" means
				  the California Environmental Protection Agency's Office of Environmental Health
				  Hazard Assessment.
(5) "Remediation
				  Goal" is a contaminant concentration that is:
(i) media-specific (e.g., for the air,
				  groundwater, surface water, or soil affected by a release);
(ii) site-specific (factoring in, for
				  example, potential receptors, exposure pathways, contaminant background
				  concentrations and reasonably anticipated future land uses);
(iii) protective of human health and the
				  environment; and
(iv) used as a
				  final cleanup goal for the response or corrective action.
(6) "Screening Level" is a generic risk-based
				  concentration derived from standardized risk assessment equations combining
				  exposure information assumptions with applicable toxicity criteria. Screening
				  Levels are contaminant concentrations considered to be protective for humans
				  (including sensitive groups) over a lifetime. Screening Levels calculated using
				  the toxicity criteria under this Chapter do not address non-human health
				  endpoints such as ecological impacts.
(7) "Site" has the same meaning as the term
				  "facility" as defined by Health and Safety Code section
				  25323.9
				  and also includes "hazardous waste facilities" and "sites" as those terms are
				  defined in
				  22 CCR
				  66260.10.
(8) "Total Petroleum Hydrocarbons" (TPH) is a
				  term to describe a large family of several hundred chemical compounds derived
				  from crude oil.