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CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM – Page 1 

(Electronic Format) 

I. GENERAL INFORMATION

District: South Coast Air Quality Management District

Rule No(s): 1143 Date Adopted/Amended/Rescinded: December 3, 2010

Rule Title(s): Consumer Paint Thinners & Multi-Purpose Solvents

Date Submitted to ARB: January 7, 2011

If an Amended Rule, Date Last Amended (or Adopted): Amended on July 9, 2010

Is the Rule Intended to be sent to the U.S. EPA as a SIP Revision? Yes No (If No, do not complete remainder of form)

District Contact: Mr. Naveen Berry Phone Number: 909-396-2363 E-mail Address: nberry@aqmd.gov

Narrative Summary of New Rule or Rule Changes: New Rule Amended Rule 

This submittal addresses the December 3, 2010 amendment as well as the amendments of June 4, 2010 and 

July 9, 2010. 

The December 3, 2010 amendment has four key elements; (1) exempting artist solvents and thinners that are 

properly labeled and sold in containers that are one liter or less from applicable VOC limits; (2) defining artist 

solvents and thinners; (3) making changes to the rule to clarify that all exempt products shall be subject to 

recordkeeping and reporting requirements; and (4) making changes to the rule to clarify that the sell-through 

provisions for the final VOC limit do not apply to products that do not meet the interim VOC limit. The purpose 

for the artist solvents and thinners is due to the artist industry not having current low-VOC products available. 

In addition, AQMD staff crafted the artist exemption and definition to be as consistent as possible with the 

Artist’s Solvent/Thinner language in CARB’s Consumer Products Regulation. This amendment will forego 114 

pounds of VOC emissions per day, which is 0.6% of the original composite VOC reduction that was claimed 

for the March 6, 2009 adoption date, when the rule is fully implemented on January 1, 2012. 

The June 4, 2010 amendment rescinded the final limit of 25 g/L VOC to comply with a court order. The July 9, 

2010 amendment addressed the court order by incorporating additional labeling, education and outreach 

efforts to increase awareness of potential flammability issues associated with reformulated solvents and 

thinners. The July 9, 2010 amendment also included administrative corrections to improve rule clarity and 

also added a provision to allow for the products manufactured prior to July 9, 2010 and labeled for more than 

one use including industrial maintenance coating thinning to be sold, used, supplied or offered for sale up to 

April 1, 2011. 

Pollutant(s) Regulated by the Rule (Check): ROG (NOX) SO2

 (CO) PM TAC (name): 

II. EFFECT ON EMISSIONS

Complete this section ONLY for rules that, when implemented, will result in quantifiable changes in emissions. Attach reference(s) for emission 

factor(s) and other information. Attach calculation sheet showing how the emission information provided below was determined. 

Net Effect on Emissions: Increase* Decrease** N/A 

This source category will have an increased net effect on emissions: The Artist Solvents/Thinners exemption will 

result in foregoing 114 pounds per day of VOC emissions. See attached sheet with emissions calculations. 

Inventory Year Used to Calculate Changes in Emissions: CARB data from 2003 Area Affected: South Coast AQMD
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APCD/AQMD RULE EVALUATION FORM - Page 2 

(Electronic Format) 

Future Year Control Profile Estimate (Provide information on as many years as possible): 

This rule is expected to reduce VOC emissions by 95% by 2012. The interim limit of 300 g/L VOC is currently 

in effect; it became effective on January 1, 2010 and is expected to result in a reduction of 5.94 tpd of VOC 

emissions. The final limit of 25 g/L VOC in Rule 1143 was rescinded on June 4, 2010 to comply with a court 

order. The final limit was to be implemented on January 1, 2011 and was to result in 3.81 tpd of VOC 

emissions reduction by January 1, 2012. The final limit of 25 g/L VOC was re-adopted on July 9, 2010 thus 

restoring the 3.81 tons per day VOC emissions foregone. The final limit of 25 g/L VOC will become effective

on January 1, 2011, and is expected to yield 3.81 tpd of VOC reductions by January 1, 2012. However, the 

artist exemption was adopted on December 3, 2010 and will result in 0.057 tpd of VOC emissions foregone. 

The 0.057 tpd of VOC emissions foregone from Artist Solvents/Thinners combined with the 3.81 tpd VOC

emission reductions for the final limit will result in a revised final limit reduction of 3.75 tpd of VOC emissions. 

The composite VOC emissions reduction for this rule, when fully implemented on January 1, 2012, will be 9.69 

tpd. 

Baseline Inventory in the SIP for the Control Measure: 10.2 tons per day, Annual Average (2014)

Baseline Inventory in the SIP for the Control Measure: 10.6 tons per day, Planning Inventory (2023)

Emissions Reduction Commitment in the SIP for the Control Measure: 9.75 tpd VOC Emissions, Annual Average (2014)

Emissions Reduction Commitment in the SIP for the Control Measure: 10.2 tpd VOC Emissions, Planning Inventory (2023)

Revised Baseline Inventory (if any): Not Applicable

Revised Emission Reduction Estimate (if developed): 9.69 tpd VOC Emissions, Annual Average (2014)

Revised Emission Reduction Estimate (if developed): 10.1 tpd VOC Emissions, Planning Inventory (2023)

Note that the district’s input to the Rule Evaluation Form will not be used as input to the ARB’s emission forecasting and planning. 

III. SOURCES/ATTAINMENT STATUS

District is: Attainment Nonattainment Split 

Approximate Total Number of Small (<100 TPY) Sources Affected by this Amendment: 

Percent in Nonattainment Area: 0% 

Number of Large (> 100 TPY) Sources Controlled: 0 Percent in Nonattainment Area: 0% 

Name(s) and Location(s) (city and county) of Large (> 100 tpy) Sources Controlled by Rule (Attach additional sheets as necessary): 

IV. EMISSION REDUCTION TECHNOLOGY

Does the Rule Include Emission Limits that are Continuous? Yes No 

If Yes, Those Limits are in Section(s) (d) of the Rule. 

Other Methods in the Rule for Achieving Emission Reductions are: N/A

V. OTHER REQUIREMENTS

The Rule Contains: 

Emission Limits in Section(s): (d) Work Practice Standards in Section(s): (d)

Recordkeeping Requirements in Section(s): (f) Reporting Requirements in Section(s): (e)
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APCD/AQMD RULE EVALUATION FORM - Page 3 

(Electronic Format) 

VI. IMPACT ON AIR QUALITY PLAN

 No Impact Impacts RFP Impacts attainment – emissions foregone

Discussion: The proposed amendment will result in 114 pounds per day (0.057 tons per day) of VOC 

emissions foregone, which equates to approximately 18.5 gallons per day. The total VOC emission reductions 

applied to Rule 1143 amount to a reduction of 9.75 tons per day by January 1, 2012. Because the current 

proposal will result in foregoing 0.057 tons per day of VOC emissions, the total VOC emission reductions 

applied to Rule 1143 will be revised to 9.69 tons per day. The VOC emissions foregone represent 0.6% of the 

total existing VOC emission reductions applied to Rule 1143.

VII. SUPPLEMENTAL CALCULATIONS

March 6, 2009 adoption of Rule 1143 – Consumer Paint Thinners & Multi-Purpose Solvents. 

• Interim VOC limit-effective January 1, 2010 will yield a reduction of 5.94 tpd of VOC emissions by January 1, 2011. 

• Final VOC limit-effective January 1, 2011 will yield a reduction of 3.81 tpd of VOC emissions by January 1, 2012. 

June 4, 2010 amendment to Rule 1143 - the final 25 g/L VOC limit rescinded. 

• Interim VOC limit-in effect and will yield a reduction of 5.94 tpd of VOC emissions by January 1, 2011. 

• Final VOC limit-rescinded on June 4, 2010 and will result in 3.81 tpd of VOC emissions foregone. 

July 9, 2010 amendment to Rule 1143 - readoption of the final 25 g/L VOC limit. 

• Interim VOC limit-in effect and will yield a reduction of 5.94 tpd of VOC emissions by January 1, 2011. 

• Final VOC limit-readopted on July 9, 2010 and will result in a reduction of 3.81 tpd of VOC emissions by January 

1, 2012. 

December 3, 2010 amendment to Rule 1143 - adopting the Artist Solvents and Thinners exemption 

• CARB 2006 Consumer and Commercial Products Survey statistics revealed the VOC emissions contribution for 

artist solvents and thinners to be 252.7 pounds per day for the state of California. 

• SCAQMD determines VOC emissions to be 45% of the statewide emissions inventory; thus 

 252.7 lbs/day * 0.45 = 113.7 lbs/day; and 

 113.7 * 1 ton /2000 lbs = 0.057 tons per day (tpd) of emissions foregone 

• Rule 1143 Interim limit (300 g/L) will result in a VOC emissions reduction of 5.94 tpd by January 1, 2011. 

• Rule 1143 final limit will (25 g/L) will result in a VOC emissions reduction of 3.81 tpd by January 1, 2012. 

• Composite VOC emissions reduction will be 9.75 tpd by January 1, 2012. 
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APCD/AQMD RULE EVALUATION FORM - Page 4 

(Electronic Format) 

Factoring in the emissions foregone for the Artist Solvents and Thinners exemption:

• Emissions foregone for this amendment will be 0.057 tpd 

• The revised composite VOC emissions reduction applied to Rule 1143 is determined by subtracting the 0.057 tpd 

of emissions foregone for this amendment from the initial composite VOC emissions reduction of 9.75 tpd. The 

difference is a revised composite VOC emissions reduction of 9.69 tpd by January 1, 2012. 

• The amendments to Rule 1143 will result in an increase of 0.62% of VOC emissions foregone; hence 

 (9.75 tpd – 9.69 tpd)/9.75 tpd = 0.0062*100% = 0.62% increase in VOC emissions.