CALIFORNIA AIR RESOURCES BOARD
Auditorium, Room 1138
107 South Broadway
Los Angeles, CA
August 22, 1985
85-13-1 Public Hearing to Consider Amendments to 001
Regulations Regarding Measurement Methods for
Determining Ambient Concentrations of Suspended
Particulate Matter (PM10) and Related Matters.
85-13-2 Public Hearing to Consider Adoption of Amendments 110
to Regulations Regarding the Conflict of Interest
Code of the Air Resources Board.
85-13-3 Status Report on Monitoring Oil Refinery Flares. 124
a. Closed Session
1. Personnel (as authorized by State Agency Open Meeting
Act, Govt. Code Sec. 11126(a).)
2. Litigation (Pursuant to the attorney-client privilege,
Evidence Code Sec. 950-962, and Govt. Code Sec.
b. Research Proposals
c. Delegations to Executive Officer
ITEM NO.: 85-13-1
Public Hearing to Consider Amendments to Regulations Regarding
Measurement Methods for Determining Ambient Concentrations of
Suspended Particulate Matter (PM10) and Related Matters.
The Board staff is proposing regulatory amendments which would
establish a specific PM10 sampling method for purposes of
monitoring for compliance with the PM10 standards. The proposed
method is the size selective inlet high volume (SSI) PM10
sampling method as used in accordance with ARB Method P, which
would be incorporated by reference. ARB Method P sets forth
performance specifications, operating and calibration procedures,
and calibration methods for PM10 samplers. The amendments would
provide that another PM10 sampling method may be used for
purposes of monitoring for compliance with the PM10 standards if
it is shown to the satisfaction of the ARB to give results
equivalent to the specified method at or near the level of the
standards. Further, Board staff is proposing to amend the
comment in Section 70200 to indicate that besides collecting 50
percent of all particles 10 m in diameter and a declining
fraction of particles as their diameter increases, a PM10 sampler
also collects an increasing fraction of particles as their
diameter decreases. This statement provides a more accurate
explanation of human lung deposition and PM10 sampler operation
and clarifies the existing comment. Staff also proposes to amend
the definition of suspended particulate matter (PM10) to reflect
this more accurate description of the size distribution of
particles collected by PM10 sampler.
Additional amendments proposed by the staff would relocate the
definition of suspended particulate matter as measured by the
high volume sampler method into a separate new subsection. To
emphasize the distinction from the PM10 definition, the new
subsection would define "total suspended particulate" and would
refer to suspended atmospheric particles of any size. The new
subsection would also explicitly provide that the high volume
sampler method or equivalent is to be used for monitoring for
compliance with the 24-hour SO2 standard. Finally, the 24-hour
SO2 standard provisions would be amended to reference "total"
suspended particulate matter and the notation to the 100 g/m3
standard adopted in 1969 would be made more explicit. The
amendments to the 24-hour SO2 standard and associated definition
would be nonsubstantive and for clarification only.
In its December 9, 1982 resolution approving the PM10 ambient air
quality standards, the Board directed the staff to establish
performance criteria for PM10 samplers. The Board also directed
the staff to ensure that the maximum extent possible these
criteria be identical to the criteria established by the U.S.
Environmental Protection Agency (EPA). The staff believes that
the SSI method, when operated in accordance with the appropriate
quality control procedures, will provide accurate and reliable
PM10 measurements, and will satisfy the PM10 sampler regulations
currently being considered by the EPA and its staff (Federal
Register, Vol. 49, No. 55, March 20, 1984). Additionally, the
SSI method is currently used at 32 state and local district
monitoring sites in California. The U.S. Environmental
Protection Agency has also purchased approximately 600 SSI
samplers for a national monitoring network.
SUMMARY AND IMPACTS OF PROPOSED BOARD ACTION
The staff believes that there are no significant environmental or
cost impacts or issues of controversy regarding the proposed
adoption of a PM10 sampling method and associated performance
ITEM NO.: 85-13-2
Public Hearing to Consider the Adoption of Amendments Regarding
the Conflict of Interest Code of the Air Resources Board.
The Air Resources Board (ARB) staff recommends that the Board
adopt the proposed amendments to the conflict of interest
The ARB has adopted conflict of interest regulations to comply
with the provisions of the Political Reform Act. The Board's
conflict of interest regulations specify financial disclosure
categories and requirements for Board members and ARB employees.
ARB staff has proposed amendments to the Board's conflict of
interest regulations in order to bring them up to date. Since
these regulations were last amended, two new committees have been
established pursuant to legislation, the Scientific Review Panel
on Toxic Air Contaminants and the Scientific Advisory Committee
on Acid Deposition. In addition, the provisions of the
Government Code now require the Board's Training Section Manager
to be included in the conflict of interest regulations.
The proposed amendments would add the two new committees and the
Training Section Manager to the Board's designated disclosure
categories. In addition, the proposed amendments would change
the disclosure category of the Research Screening Committee, add
the members of the Abrasive Blasting Committee to the Board's
designated disclosure categories, and make minor grammatical and
clarifying changes to the regulations.
SUMMARY AND IMPACTS OF PROPOSED BOARD ACTION
The adoption of the proposed amendments is not expected to result
in any adverse environmental or economic impacts.