OVERVIEWREPORTTOTHEBOARDOFSUPERVISORS 2016-08-12.PDF

Report to the Board of Supervisors: Overview
Prepared by the Maricopa County Air Quality Department
The Maricopa County Air Quality Department is requesting that the Board of Supervisors adopt
amendments to nine (9) Maricopa County Air Pollution Control Regulations. Nine (9) rules are being revised to
address the requirements of the State Implementation Plan (SIP) for “moderate” nonattainment for the 2008 eight-
hour ozone national ambient air quality standard (NAAQS).
These regulatory amendments followed the Enhanced Regulatory Outreach Program (EROP) Policy and workflow
process. The County Manager briefed the Board of Supervisors regarding these rulemakings in May 2015. Twenty-
one (21) Stakeholder workshops were held June 2015 through February 2016. On April 25, 2016, the Board of
Health approved these regulatory amendments for the Expedited Process. A 30-day comment period was held May-
June 2016. Written comments were received during the 30-day comment period and have been incorporated into this
rulemaking.
A summary of each rule being revised is described below.
Volatile organic compounds (VOCs) and nitrogen oxides (NOx) are precursors of ozone. Since Maricopa County
has been reclassified to “moderate” nonattainment for the 2008 eight-hour ozone NAAQS, the Clean Air Act
requires Maricopa County to implement “reasonably available control technology” (RACT) to control VOC and
NOx emissions.
The following six rules are being revised to address RACT for VOCs:
• AQ-2015-005-Rule 336 (Surface Coating Operations)
Rule 336 regulates emissions of VOCs from surface coating facilities not regulated by another source specific
Maricopa County rule. Revisions proposed in Rule 336 incorporate recommendations from five Control
Techniques Guidelines (CTGs) addressing the following topics: Metal Furniture Coatings, Large Appliance
Coatings, Miscellaneous Metal and Plastic Parts, Paper, Film, and Foil Coatings, and Industrial Cleaning
Solvents.
• AQ-2015-006-Rule 342 (Coating Wood Furniture And Fixtures)
Rule 342 limits the emission of VOCs from the surface preparation and coating of wood furniture and fixtures.
Revisions proposed in Rule 342 incorporate recommendations from the CTG addressing wood furniture
manufacturing operations.
• AQ-2015-008-Rule 350 (Storage Of Organic Liquids At Bulk Plants And Bulk Terminals)
Rule 350 limits the emission of VOCs from organic liquids (non-gasoline) under actual storage conditions. The
rule is applicable to bulk storage of organic liquids in a bulk plant or bulk terminal stationary storage tank which
is used primarily to fill delivery vessels for the organic liquid (non-gasoline). Revisions proposed in Rule 350
include the separation of the organic liquid (non-gasoline) requirements and the gasoline requirements of Rule
350. The organic liquid (non-gasoline) storage requirements in Rule 350 and the organic liquid “loading”
requirements Rule 351 (Loading of Organic Liquids) are proposed to be combined and included into one rule,
Rule 350. The gasoline storage requirements in Rule 350 are proposed to be moved into Rule 351. Along with this
proposed separation of the two industry requirements, the department is proposing to rename the rule to reflect the
proposed rule revisions.
• AQ-2015-008-Rule 351 (Loading Of Organic Liquids)
Rule 351 limits the emission of VOCs from organic liquids (non-gasoline) under actual loading conditions. The
rule is applicable to the transfer of organic liquids (non-gasoline) having a true vapor pressure of 1.5 psia or
greater under actual loading conditions. The rule regulates the transfer of organic liquids (non-gasoline) from a
stationary storage tank located at a bulk plant or bulk terminal into and out of delivery vessels. The proposed
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revisions include the separation of the gasoline requirements and the organic liquid (non-gasoline) requirements in
Rule 351. The gasoline storage requirements from Rule 350 and the gasoline loading requirements in Rule 351 are
proposed to be combined and included into one rule, proposed Rule 351. The organic liquid (non-gasoline)
loading requirements in Rule 351 are proposed to be moved into Rule 350. Along with this proposed separation of
the two industry requirements, the department is proposing to rename the rule to reflect the proposed rule
revisions.
• AQ-2015-008-Rule 352 (Gasoline Delivery Vessel Testing And Use)
Rule 352 limits the emission of VOCs from gasoline delivery vessels and applies to any gasoline delivery vessel
used to receive or deliver gasoline within Maricopa County and to all persons who own, operate, maintain, repair
or test the delivery vessel. Revisions proposed in Rule 352 include updating the rule to use current industry
language, updating test methods, clarifying the loading requirements for bulk terminals, bulk plants and gasoline
dispensing facilities.
• AQ-2015-008-Rule 353 (Gasoline In Stationary Dispensing Tanks)
Rule 353 limits the emission of VOCs from gasoline stored in stationary dispensing tanks and from gasoline
delivered into such tanks. Revisions proposed in Rule 353 include making terms and definitions consistent,
clarifying the storage and loading requirements of above ground storage tanks and underground storage tanks,
updating test methods, and clarifying inspection requirements for gasoline dispensing facilities that receive
gasoline less than once per week.
The following three rules are being revised to address RACT for NOx:
• AQ-2015-002-Rule 322 (Power Plant Operations)
Rule 322 limits the discharge of carbon monoxide, NOx, particulate matter and sulfur oxides emissions into the
atmosphere from stationary fossil-fuel-fired equipment at power plants and cogeneration plants. Revisions
proposed in Rule 322 include changing the NOx limitation when burning gaseous fossil fuel from “155 ppmv” to
“42 ppmdv” and when burning liquid fossil fuel from “230 ppmv” to “65 ppmdv”. The U.S. Environmental
Protection Agency (EPA) has advised that these limitations are considered RACT for NOx. In addition, Rule 322
is proposed to apply to all power plants (and not just to those built or modified before May 10, 1996). With this
revision, Rule 322 will be in compliance with the Clean Air Act requirement that major sources in ozone
nonattainment areas classified at moderate or higher must be regulated under a SIP-approved RACT rule.
• AQ-2015-003-Rule 323 (Fuel Burning Equipment From Industrial/Commercial/Institutional Sources)
Rule 323 limits the discharge of carbon monoxide, NOx, particulate matter, and sulfur oxides emissions into the
atmosphere from fuel burning combustion equipment at industrial, commercial, and institutional (ICI) sources.
Revisions proposed in Rule 323 include changing the NOx limitation when burning gaseous fossil fuel from “155
ppmv” to “42 ppmdv” and when burning liquid fossil fuel from “230 ppmv” to “65 ppmdv”. The EPA has advised
that these limitations are considered RACT for NOx.
• AQ-2015-004-Rule 324 (Stationary Internal Combustion (IC) Engines)
Rule 324 limits the discharge of carbon monoxide, NOx, particulate matter, sulfur oxides, and VOC emissions
from stationary IC engines. Revisions proposed in Rule 324 include clarifying the three options that non-
emergency engines have available for complying with the rule. A source can (1) comply with the provisions for
add-on control equipment for non-emergency engines, (2) comply with the current emission limitations in Rule
324 or (3) comply with the federal standards of performance for non-emergency engines. The current emission
limits in Rule 324 are proposed to be retained.
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