1

The The Aerosol Coatings Aerosol Coatings Reactivity-Based Reactivity-Based

RegulationRegulation

California Environmental Protection Agency

Air Resources Board

2

New Regulatory New Regulatory ConceptConcept

Limits Based on Photochemical Limits Based on Photochemical ReactivityReactivity

Efficient Ozone ReductionsEfficient Ozone Reductions Cost SavingsCost Savings Compliance FlexibilityCompliance Flexibility

3

The Aerosol Coatings The Aerosol Coatings RegulationRegulation

Two Tiers of Mass-Based Limits for 35 Categories

Board Hearing, June 22, 2000 Established equivalent reactivity-

based VOC limits

4

Why Propose Reactivity Why Propose Reactivity Regulation for Aerosol Regulation for Aerosol Coatings?Coatings?

Well-defined Consumer Product Well-defined Consumer Product CategoryCategory

Detailed Speciated VOC Data Detailed Speciated VOC Data AvailableAvailable

VOC Ingredients Well-Studied VOC Ingredients Well-Studied for Reactivityfor Reactivity

Aerosol Coatings Industry Open Aerosol Coatings Industry Open to Reactivity Approachto Reactivity Approach

5

Use of the MIR Scale in Use of the MIR Scale in CaliforniaCalifornia

Method to Quantify Ozone Impact Method to Quantify Ozone Impact of VOCsof VOCs

MIR Scale developed by Dr. CarterMIR Scale developed by Dr. Carter Chemical Mechanism Peer Chemical Mechanism Peer

Reviewed and Approved by RSACReviewed and Approved by RSAC Currently used in California Clean Currently used in California Clean

Fuels and Low Emission Vehicles Fuels and Low Emission Vehicles ProgramProgram

6

Target Ozone Reduction Target Ozone Reduction CalculationCalculation

Target Ozone Reduction calculated Target Ozone Reduction calculated using speciated VOC datausing speciated VOC data::

= = Sales-Weighted Average MIRSales-Weighted Average MIR

(SWA-MIR) of VOCs (SWA-MIR) of VOCs

x VOC Reduction x VOC Reduction CommitmentCommitment

7

Calculating Ozone Calculating Ozone ReductionReduction

Mass LimitsMass Limits Reactivity Reactivity LimitsLimits

3.1 Tons per Day 3.1 Tons per Day == 9.6 9.6 Tons per DayTons per Day

VOC ReductionVOC Reduction Ozone Ozone ReductionReduction

8

Hydrocarbon Solvent Hydrocarbon Solvent BinsBins

““Bin” System to Categorize Bin” System to Categorize Solvents with Similar Solvents with Similar CharacteristicsCharacteristics

Validated Method Using Data Validated Method Using Data from Solvent Manufacturersfrom Solvent Manufacturers

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Hydrocarbon Solvent Hydrocarbon Solvent BinsBins

Table for Hydrocarbon Solvent MIRsTable for Hydrocarbon Solvent MIRs 20 Bins for Solvents Predominately 20 Bins for Solvents Predominately

Paraffinic, Isoparaffinic, and Cyclic Paraffinic, Isoparaffinic, and Cyclic AlkanesAlkanes Mean Boiling PointMean Boiling Point Aromatic contentAromatic content

4 Bins for Solvents Containing Only 4 Bins for Solvents Containing Only Aromatic HydrocarbonsAromatic Hydrocarbons Boiling rangeBoiling range Default valuesDefault values

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No ExemptionsNo Exemptions

Mass-Based Definition of VOCMass-Based Definition of VOC Exempts Acetone, Methyl Acetate Exempts Acetone, Methyl Acetate

and Other Low and Negligibly and Other Low and Negligibly Reactive CompoundsReactive Compounds

Reactivity-Based AmendmentsReactivity-Based Amendments No ExemptionsNo Exemptions

11

Other Factors to Other Factors to ConsiderConsider

MIR value uncertainty Methodology to set limits

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Review of MIRsReview of MIRs

Review of MIRsReview of MIRs 18 months review and update18 months review and update Regulatory processRegulatory process ““Lock in” Aerosol Coating Lock in” Aerosol Coating

MIRs for 5 yearsMIRs for 5 years New compounds added can New compounds added can

be usedbe used

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Tables of Maximum Tables of Maximum Incremental Reactivity Incremental Reactivity (MIR) Values(MIR) Values

New Subchapter 8.6 to Title 17 New Subchapter 8.6 to Title 17 of CCR - Tables of MIR Valuesof CCR - Tables of MIR Values

--Individual VOCs--Individual VOCs

--Aliphatic Hydrocarbon Solvents--Aliphatic Hydrocarbon Solvents

--Aromatic Hydrocarbon Solvents--Aromatic Hydrocarbon Solvents

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Prohibition on Use of Prohibition on Use of Toxic Air ContaminantsToxic Air Contaminants

Prohibit Use of:Prohibit Use of:

--Trichloroethylene (TCE)--Trichloroethylene (TCE)

--Methylene Chloride (MeCl)--Methylene Chloride (MeCl)

--Perchloroethylene (Perc)--Perchloroethylene (Perc)

15

Calculating Product-Calculating Product-Weighted MIRWeighted MIR

WeightWeight Weighted WeightedContentsContents FractionFraction MIRMIR Reactivity Reactivity

acetoneacetone 0.3000.300 0.430.43 0.129 0.129

toluenetoluene 0.1500.150 3.973.97 0.596 0.596

propanepropane 0.2000.200 0.560.56 0.112 0.112

xylenexylene 0.0500.050 7.37 7.37 0.369 0.369

butanebutane 0.2000.200 1.331.33 0.266 0.266

solidssolids 0.100 0.100 0 0 0.000 0.000

TotalTotal 1.0001.000 1.472 1.472

Product MIR= 1.47 g OProduct MIR= 1.47 g O33/g product/g product

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SummarySummary

Innovative Regulatory ConceptInnovative Regulatory Concept

Equivalent Ozone ReductionsEquivalent Ozone Reductions

Pilot ProgramPilot Program