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rma -- Risk Management Guidance for Stationary Sources of Air Toxics (July 23, 2015)

Posted: 24 Sep 2015 14:43:56
The California Air Resources Board (ARB/Board) and the California
Air Pollution Control Officer’s Association (CAPCOA) announce the
release of the “Risk Management Guidance for Stationary Sources
of Air Toxics”. This document provides guidance that California’s
35 local Air Pollution Control Districts and Air Quality
Management Districts (Districts) may elect to use for
incorporating the Office of Environmental Health Hazard
Assessment’s (OEHHA) new health risk assessment methodology into
their stationary source permitting and Assembly Bill (AB) 2588
Air Toxics Hot Spots programs.  This document is now available
at: http://www.arb.ca.gov/toxics/rma/rmaguideline.htm.

If you have questions regarding the document, please contact Mr.
Gregory Harris, Staff Air Pollution Specialist, at (916) 327 5980
or via email at gregory.harris@arb.ca.gov.


Background

On March 6, 2015, OEHHA released the Air Toxics Hot Spots Program
Risk Assessment Guidelines: Guidance Manual for the Preparation
of Health Risk Assessments.  This document contains the new risk
assessment methodology that addresses the latest scientific
information on childhood sensitivities and the most recent data
on childhood and adult exposure to air toxics.  It represents an
accumulation of data since the passage of the Children’s Health
Protection Act of 1999 (SB 25, Stats. 1999) which required OEHHA
to ensure infants and children are explicitly addressed in
assessing risk.  The use of the new risk assessment methodology
may result in higher estimated cancer risk than what would have
been calculated using the previous 2003 OEHHA risk assessment
methodology for the same level of emissions and conditions.  More
information on the new OEHHA methodology can be found at:
http://oehha.ca.gov/air/hot_spots/hotspots2015.html.  

The ARB and the Districts are currently reevaluating their air
toxics-related programs to determine if adjustments need to be
made to permitting, source specific regulations, or Hot Spot
programs.  The “Risk Management Guidance for Stationary Sources
of Air Toxics” is intended to help Districts with their
reevaluation process and to communicate ARB and Districts’ plans,
priorities, and policies regarding implementation of the new
OEHHA risk assessment methodology.  This document supersedes
ARB’s Risk Management Guidelines for New and Modified Sources of
Toxic Air Pollutants (1993).  In addition, this document conveys
ARB’s work plan for evaluating the Board’s Air Toxics Program and
provides the updated Risk Management Policy for Inhalation Risk
Assessments which replaces the ARB’s Interim Risk Management
Policy for Inhalation based Residential Cancer Risk (2003).



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