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omb -- Workshops Risk Management Guidance for Stationary Sources of Air Toxics
Posted: 27 May 2015 12:00:12
Workshops Risk Management Guidance for Stationary Sources of Air
Toxics.
The California Air Resources Board (ARB/Board) and the California
Air Pollution Control Officer’s Association (CAPCOA) invite you
to participate in two public workshops to discuss the “Risk
Management Guidance for Stationary Sources of Air Toxics.” This
draft document is a discussion draft of 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
(Stats. 1987) Air Toxics Hot Spots programs. This document will
be available for public comment beginning on May 27, 2015, and
will be posted at
http://www.arb.ca.gov/toxics/rma/rmaguideline.htm. Following the
workshops, we will release a revised draft for consideration by
the Air Resources Board at a public hearing on July 23, 2015.
The workshops will be held at the following times and locations:
Date: Tuesday, June 16, 2015 (webcast)
Time: 9:00 a.m. – 11:30 a.m. (PST)
Location: South Coast Air Quality Management District
Auditorium
21865 Copley Drive
Diamond Bar, California 91765-4182
Date: Thursday, June 18, 2015 (webcast)
Time: 9:00 a.m. – 11:30 a.m. (PST)
Location: CalEPA Headquarters Building
Byron Sher Auditorium
1001 I Street, 2nd Floor
Sacramento, California 95814
More information on these workshops and a copy of the workshop
notice is available at:
http://www.arb.ca.gov/toxics/rma/rmaworkshops.htm. If you have
questions regarding the upcoming workshops, 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.
In general, the higher estimated risks mean that new or modified
sources of toxics may need additional emissions control. For
existing sources, even though they meet existing rules and
regulations, additional emissions control may be needed since the
higher estimated risk might now exceed the District’s risk
reduction levels for Hot Spots requirements. ARB and Districts
are reevaluating their 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. When approved, this document
will supersede 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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