Amendments to Title 27, California Code of Regulations, Sections 25801 and 25803 No Observable Effect Levels for Listed Chemicals

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On March 17, 2011, the Office of Administrative Law approved amendments to Title 27, California Code of Regulations, sections 25801 and 25803. This rulemaking action amends existing procedures to clarify the original intent of the regulation and allow for the most current and appropriate methodology to be applied to quantitative risk assessment.  This amendment also provides default age-specific bodyweights to be used in calculation of the maximum allowable dose level. The amendment is effective on April 16, 2011. 

Questions regarding this regulatory action can be directed to Monet Vela, at or (916) 323-2517 or Carol J. Monahan-Cummings, Chief Counsel at or (916) 322-0493.