Santa Barbara County APCD Rule 349 349 - 1 April 27, 1993[date of amended rule adoption]

RULE 349. POLYESTER RESIN OPERATIONS. (Adopted 4/27/1993, revised [date of amended rule 

adoption]) 

A. Applicability 

 This rule shall apply to any person owning or operating any all commercial and or industrial polyester resin 

operations. 

B. Exemptions 

1. Section D.1, shall not apply to the addition or use of styrene, provided the volume of styrene used 

is less than 50 gallons per calendar year per stationary source. Any person claiming this 

exemption shall maintain monthly styrene usage records of the total volume (gallons) of styrene 

used per calendar year consistent with Sections F.6 and make them available to the District for 

review upon request. At a minimum, when using compliant materials, the records shall be kept on 

a monthly basis; and when using noncompliant materials, the records shall be kept on a daily 

basis. 

2. This rule shall not apply to any cleaning performed with a solvent (including emulsions) that 

contains two percent by weight or less of each of the following: 

a. Reactive organic compounds, and 

b. Toxic air contaminants (as determined by generic solvent data, solvent manufacturer’s 

composition data or by a gas chromatography test and a mass spectrometry test). 

c. Any person claiming this exemption shall maintain the records specified in Sections F.1.a 

and F.1.f in a manner consistent with Section F.7 and make them available for review. 

3. This rule shall not apply to polyester resin operations performed with polyester resin materials that 

contain no reactive organic compounds. 

4. Section H shall not apply to any of the following: 

a. Cleaning of semiconductor and microelectromechanical devices undergoing 

manufacturing processes involving thin film deposition, vacuum deposition, dry etching, 

or metal lift-off operations; including any maintenance activities associated with such 

operations; 

b. Cleaning of electronic components; 

c. Cleaning of encasements, including decoy shells or box casings, for electronic 

components that have a total surface area that is less than 2 square feet; 

d. Cleaning of parts, subassemblies, or assemblies that are exposed to strong oxidizers or 

reducers (e.g., nitrogen tetroxide, liquid oxygen, or hydrazine); 

e. Cleaning of transparencies, polycarbonate, or glass substrates; 

f. Cleaning of solar cells, coated optics, laser hardware, scientific instruments, highprecision optics, telescopes, avionic equipment, microscopes, and military fluid systems; 

g. Cleaning or stripping of coating overspray from personal protective equipment; 

h. Cleaning of space vehicles. 
 

Santa Barbara County APCD Rule 349 349 - 2 April 27, 1993[date of amended rule adoption]

5. Section H shall not apply to polyester resin operations production or rework of the following 

products, provided the solvents used contain 200 grams of reactive organic compound per liter of 

material or less or have a reactive organic compound composite partial pressure of 45 millimeter 

of mercury at 20 degrees Celsius or less: 

a. Satellites, satellite components, aerospace vehicles, aerospace vehicle components, 

aerospace vehicle payloads, or aerospace vehicle payload components. 

6. Section H shall not apply to polyester resin operations production or rework of products used in 

any laboratory tests or analyses, including quality assurance or quality control applications, bench 

scale projects, or short-term (less than 2 years) research and development projects. To qualify for 

this exemption, the following records shall be maintained: 

a. A list of all solvents used, which at a minimum includes the manufacturer's identification 

and the reactive organic compound content of each solvent. 

b. For each short-term research and development project, the project description, date it 

commenced, and date it concluded. 

c. Such records shall be retained in accordance with the provisions of Section F.7. 

7. Section H shall not apply to cleaning or stripping of polyester resin material from personal 

protective equipment. 

C. Definitions 

See Rule 102, Definitions, for definitions not limited to this rule. For the purposes of this Rrule, the 

following definitions shall apply:

“Aerospace Vehicle or Component” means any fabricated part, processed part, assembly of parts, or 

completed unit of any aircraft including but not limited to airplanes, helicopters, missiles, rockets, and 

space vehicles includes satellites. 

“Associated Solvent” means any solvent used in a solvent cleaning machine or for solvent cleaning 

performed in association with a polyester resin operation. 

“Atomized Resin Application” means any resin application technology in which the resin leaves the 

application equipment and breaks into droplets or an aerosol as it travels from the application equipment to 

the surface of the part. Atomized resin application includes, but is not limited to, resin spray guns and resin 

chopper spray guns. 

“Bench Scale Project” means a project (other than at a research and development facility) that is operated 

on a small scale, such as one capable of being located on a laboratory bench top. 

1. “Catalyst” is a means any substance added to the resin to initiate polymerization. 

2. “Cleaning Materials” include but are not limited to, materials used for cleaning hands, tools, 

molds, application equipment, and work area. 

“Clear Gel Coat” means any gel coat that is clear or translucent so that underlying colors are visible. 

Clear gel coat is used to manufacture parts for sale. Clear gel coat do not include tooling gel coat used to 

build or repair molds. 
 

Santa Barbara County APCD Rule 349 349 - 3 April 27, 1993[date of amended rule adoption]

“Compliant Material” means any polyester resin material that complies with the 1) applicable monomer 

content limits in Section D.1.a, D.1.b, or D.1.c, or 2) the D.1.d emission limit of grams per square meter of 

exposed surface area during resin polymerization; or any solvent that complies with the reactive organic 

compound content limit in Section H. 

3. “Closed Mold System” is a means any method of forming objects from polyester resins by 

placing the polyester resin material in a confining mold cavity and applying pressure and/or heat. 

“Control” means the reduction, by destruction or removal, of the amount of affected pollutants in a gas 

stream prior to discharge to the atmosphere.

4. “Control System” includes a control device and a collection system means any combination of 

pollutant capture system(s) and control device(s) used to reduce discharge to the atmosphere of reactive 

organic compound or toxic air contaminant emissions generated by a regulated operation. 

“Corrosion-Resistant Resin” means any polyester resin material used to make products for corrosion 

resistant applications such as, but not limited to, tooling, fuel or chemical tanks, boat hulls, pools, and 

outdoor spas. 

5. “Cross-Linking” is the means any chemical process of chemically bonding two or more polymer 

chains together. 

6. “Cure” means to polymerize, i.e., to transform from a liquid to a solid or semi-solid state to 

achieve desired product physical properties, including hardness. 

7. “Fiberglass” is means a fiber made from glass and similar in appearance to wool or cotton fiber. 

“Filler” means any finely divided inert (non-ROC) material that is added to the resin to enhance its 

mechanical properties and extend its volume. Fillers include, but are not limited to, silica, carbon black, 

talc, mica and calcium carbonate. 

“Fire Retardant Resin” means any polyester resin material used to make products that are resistant to 

flame or fire. 

“Fluid Impingement Technology” means any spray gun that produces an expanding nonmisting curtain of 

liquid by the impingement of low-pressure uninterrupted liquid streams. 

8. “Gel Coat” is means a polyester resin topcoat that provides cosmetic enhancement and improves 

resistance to degradation from exposure to the environment. 

9. Grams of ROC per liter of material is the weight of ROC per volume of material and can be 

calculated by the following equation:

 (W s ̶ W w ̶ W es) 

Grams of ROC per liter of material = 

 V m

Where:

W s = weight of volatile compounds in grams 

W w = weight of water in grams 

W es = weight of exempt compounds in grams 

V m = volume of material in liters 
 

Santa Barbara County APCD Rule 349 349 - 4 April 27, 1993[date of amended rule adoption]

“High-Strength Resin” means any polyester resin material with a casting tensile strength of 10,000 

pounds per square inch or more, used to manufacture high performance products. 

10. High Volume-Low Pressure means spray equipment used to apply coatings by means of a high 

volume of air delivered at pressures between 0.1 and 10 psi air pressure.

11. “Inhibitor” is a means any substance used to slow down or prevent a chemical reaction. 

“Lamination Resins” means any orthophthalate, isophthalate and dicyclopentadiene resins used in 

composite system consisting of layers of reinforcement fibers and resins. 

12. Low-ROC Emissions Resin Systems are polyester resin materials which contain vapor 

suppressants to reduce monomer evaporation loss. 

“Maintenance Cleaning” means a solvent cleaning operation or activity carried out to keep clean general 

work areas where manufacturing or repair activity is performed, to clean tools, machinery, molds, forms, 

jigs, and equipment. This definition does not include the cleaning of adhesive, coating, or ink application 

equipment. 

“Marble or Cultured Resins” means any orthophthalate and modified acrylic isophthalate resins, which 

are designed for the fabrication of cast products, such as vanities. 

“Marble Resins” means any orthophthalate and modified acrylic isophthalate resins used for the 

fabrication of cast products. 

“Mold” means any cavity or surface into or on which gel coat, resin, and fibers are placed and from which 

finished fiberglass parts take their form. 

13. “Monomer” is an means any organic compound that combines with itself, or other similar 

compounds to become a cured thermosetting resin (e.g., styrene). 

“Non-Atomized Resin Application” means any application technology in which the resin is not broken 

into droplets or an aerosol as it travels from the application equipment to the surface of the part. Nonatomized resin application technology includes, but are not limited to, non-atomizing spray guns, 

flowcoaters, chopper flowcoaters, pressure fed resin rollers, resin impregnators, or fluid impingement 

technology. 

“Noncompliant Material” means any polyester resin material that does not comply with the 1) applicable 

monomer content limits in Section D.1.a, D.1.b, or D.1.c, or 2) the D.1.d emission limit of grams per square 

meter of exposed surface area during resin polymerization; or any solvent that does not comply with the 

reactive organic compound content limit in Section H. 

“Open Molding Resin and Gel Coat Process” means any process in which the reinforcing fibers and 

resin are placed in the mold and are open to the surrounding air while the reinforcing fibers are saturated 

with resin. For the purpose of this rule, open molding includes operations in which a vacuum bag or 

similar cover is used to compress the uncured laminate to remove bubbles or excess resin, or to achieve a 

bond between core material and a laminate. 

“Pigmented Gel Coat” means any opaque gel coat used to manufacture parts for sale. Pigmented gel coat 

does not include tooling gel coat used to build or repair molds. 

14. “Polyester” is a complex polymeric ester containing difunctional acids and alcohols dissolved in a 

monomer. 

15. “Polyester Resin Materials” include, but are not limited to, unsaturated polyester resins such as 

isophthalic, orthophthalic, halogenated, bisphenol- A, vinyl- ester, or furan resins; cross -linking agents; 
 

Santa Barbara County APCD Rule 349 349 - 5 April 27, 1993[date of amended rule adoption]

catalysts, gel coats, inhibitors, accelerators, promoters, and any other ROC reactive organic compound 

containing materials in polyester resin operations. 

16. “Polyester Resin Operations” are means those methods used for the production or rework of 

products by mixing, pouring, hand lay-up, impregnating, injecting, forming, winding, spraying, and/or 

curing unsaturated polyester resin materials with fiberglass, fillers, or any other reinforcement materials 

and associated cleanup solvent cleaning. 

17. “Polymer” is a means any chemical compound comprised of a large number of chemical units 

and which is formed by the chemical linking of monomers. 

“Primer Gel Coat” means any gel coat used to coat the surface of composite parts prior to top-coat 

painting in the automotive, aerospace, marine and home building industries.

 

18. “Repair” is that part of the fabrication process that requires the addition of polyester resin 

material to portions of a previously fabricated product in order to mend minor structural damagemeans the 

process of returning a damaged object or an object not operating properly to good condition. 

19. “Resin” is means any of a class of organic polymers of natural or synthetic origin used in 

reinforced products to surround and hold fibers, and is solid or semi-solid in the cured state. 

“Solid Surface Resins” means any resin used without gel coats to fabricate homogenous solid surface 

products. 

“Solvent” means any liquid containing any reactive organic compound or any toxic air contaminant, which 

is used as a diluent, thinner, dissolver, viscosity reducer, cleaning agent, drying agent, preservative, or other 

similar uses. 

“Solvent Cleaning” means any activity, operation, or process (including, but not limited to, surface 

preparation, cleanup, or wipe cleaning) performed outside of a solvent cleaning machine, that uses solvent 

to remove uncured adhesives, uncured coatings, uncured inks, uncured polyester resin material, uncured 

sealant, or other contaminants, including, but not limited to, dirt, soil, oil, lubricants, coolants, moisture, 

fingerprints, and grease, from parts, products, tools, machinery, application equipment, and general work 

areas. Cleaning spray equipment used for the application of coating, adhesive, ink, polyester resin material, 

or sealant is also considered to be solvent cleaning irrespective of the spray material being cured. 

“Solvent Cleaning Machine” means any device or piece of equipment that uses solvent liquid or vapor to 

remove soils, moisture, or other contaminants from the surfaces of materials. Types of solvent cleaning 

machines include, but are not limited to, batch cold, batch vapor, in-line cold, in-line vapor, remote 

reservoir, and gas-path solvent cleaners. Buckets, pails, and beakers with capacities of 3.785 liters (1.00 

gallon) or less are not considered solvent cleaning machines. However, the use of such a container or 

similar containers (e.g., hand-held spray bottles) with a liquid solvent for cleaning is considered to be 

solvent cleaning. Any device or piece of equipment used exclusively for stripping shall not be considered 

to be a solvent cleaning machine. 

“Specialty Gel Coat” means any gel coat which is used in conjunction with fire retardant, corrosion 

resistant, or high-strength materials. 

20. “Specialty Resin” is means any halogenated, furan, bisphenol A, vinyl ester, or isophthalic resin 

used to make products for exposure to one or more of the following extreme environmental conditions: 

acute or chronic exposure to corrosive, caustic, acidic, agents, or flame. 

“Tooling Gel Coat” means any gel coat used to build or repair molds (also known as tools) or prototypes 

(also known as plugs) from which the molds will be made. 
 

Santa Barbara County APCD Rule 349 349 - 6 April 27, 1993[date of amended rule adoption]

“Tooling Resin” means any resins used to build or repair molds (also known as tools) or prototypes (also 

known as plugs) from which the molds will be made. 

21. Touch-Up is that portion of the fabrication process that is necessary to cover minor imperfections. 

“Tub/Shower Resin” means any dicyclopentadiene resin, along with orthophthalate and isophthalate 

resins, used to fabricate bathware products. 

22. “Vapor Suppressant” is a means any substance added to resin to minimize the outward diffusion 

of monomer vapor into the atmosphere. 

23. “Waste Materials” include, but are not limited to any paper or cloth used for cleaning operations, 

waste resins, and any spent cleaning materials.

D. Requirements 

 1. Process and Control 

 Any No person shall operatingoperate a polyester resin operation unless the operation shall 

comply complies with one or more of the following, as applicable. 

 a. Before [24 months after the date of amended rule adoption], Use use polyester resin 

material with monomer content of no more than 35 percent by weight as applied and as 

determined by the manufacturer's specification. This requirement shall not apply to gel 

coats, provided the monomer content does not exceed 45 percent by weight for 

pigmented gel coats and does not exceed 50 percent by weight for clear gel coats. On 

and after [24 months after the date of amended rule adoption], use materials that comply 

with the limits in Table 349-1; or, 

 b. Before [24 months after the date of amended rule adoption], Use use specialty resin with 

a monomer content of no more than 50 percent by weight as applied and as determined 

by the manufacturer's specification. On and after [24 months after the date of amended 

rule adoption], use materials that comply with the limits in Table 349-1; or, 

 c. On and after [24 months after the date of amended rule adoption], use polyester resin 

material that comply with the limits shown in Table 349-1 below when using the open 

molding resin and gel coat process; or 

 Table 349-1: Monomer Content Limits for Polyester Resin Materials 

Polyester Resin Material As-Applied Monomer Content 

Limits (Percentage, by Weight) 

Clear Gel Coat 

For Marble Resins 40% 

All Other Resins 44% 

Pigmented Gel Coat 

White and Off White 30% 

Non-White 37% 

Primer 28% 

Specialty Gel Coat 28% 

Tooling Gel Coat 40% 
 

Santa Barbara County APCD Rule 349 349 - 7 April 27, 1993[date of amended rule adoption]

Polyester Resin Material As-Applied Monomer Content 

Limits (Percentage, by Weight) 

General Purpose Resin 

Lamination Resins 31% or 

35%, as supplied, with no fillers 

Marble or Cultured 

Resins 

10% or 

32%, as supplied, with no fillers 

Solid Surface Resins 17% 

Tub/Shower Resins 24% or 

35%, as supplied, with no fillers 

Specialty Resin 

Corrosion Resistant 

Resin 

48% 

Fire Retardant Resin 38% 

High Strength Resin 40% 

Tooling Resin 

Atomized (spray) 30% 

Non-atomized 39% 

All Other Resin 35% 

d. Before [24 months after the date of amended rule adoption], Useuse a resin containing a 

vapor suppressant, such that the weight loss from ROC reactive organic compound 

emissions does not exceed 60 grams per square meter of exposed surface area during 

resin polymerization;. On and after [24 months after the date of amended rule adoption], 

use a resin containing a vapor suppressant, such that the weight loss from reactive 

organic compound emissions does not exceed 50 grams per square meter of exposed 

surface area during resin polymerization. The “grams per square meter of exposed 

surface area during resin polymerization” shall be as determined by the test method 

specified in Section E.12; or, 

 de. Use a closed mold system; or, 

 ef. Install and operate an add-on emission control system, which is designed and operated in 

a manner that reduce uncontrolled emissions by at least 85 percent. provided all of the 

applicable requirements below are met. Any person installing such control system shall 

obtain an Authority to Construct from the District prior to installation. 

i. Before [24 months after the date of amended rule adoption], the overall 

efficiency (the capture efficiency multiplied by the control device efficiency) of 

the total system shall be at least 85 percent, by weight. On and after [24 months 

after the date of amended rule adoption], the overall efficiency shall be at least 

90 percent, by weight. Alternatively, the control device reactive organic 

compound exhaust concentration shall not exceed 10 parts per million by 

volume as propane or other limit approved by the Environmental Protection 

Agency, the Air Resources Board, and the Control Officer. 

ii. Combustion temperature shall be continuously monitored when operating a 

thermal incinerator. 

iii. Inlet and exhaust gas temperatures shall be continuously monitored when 

operating a catalytic incinerator. 

iv. Control device efficiency shall be continuously monitored when operating a 

carbon adsorber or a control device other than a thermal or catalytic incinerator. 
 

Santa Barbara County APCD Rule 349 349 - 8 April 27, 1993[date of amended rule adoption]

v. Compliance through the use of an emission control system shall not result in 

affected pollutant emissions in excess of the affected pollutant emissions that 

would result from compliance with Sections D.1.a - D.1.d or H. 

 

 2. Spray Application Methods 

 Any No person operating shall apply a polyester resin operation shall, when applying polyester 

resin materials by in a spraying operation, unless the application is performed with equipment 

operating according to the manufacturers operating guidelines. use only In addition, the 

application method employed shall be one of the following: 

a. aAirless, or 

b. aAir-assisted airless, or 

c. hHigh volume- low pressure spraying equipment, or 

d. eElectrostatic spray equipment, or 

e. Any other spray application method as approved by the Control Officer, the Air 

Resources Board, and the Environmental Protection Agency. and operated in accordance 

with the manufacturer's recommendations.

 3. Storage and DisposalGeneral Operating

 A person operating a polyester resin operation shall use closed containers to store all polyester 

resin materials, cleaning materials, and any unused ROC-containing materials except when 

accessed for use.Any person who owns or operates any polyester resin operation equipment or 

uses any associated solvent subject to this rule shall meet the following requirements: 

a. All polyester resin materials and cleaning materials, used or unused, shall be stored and 

disposed of in nonabsorbent and nonleaking containers equipped with tight-fitting covers. 

All covers shall be in place unless adding material to or removing material from the 

containers, the containers are empty, or doing maintenance/inspection of the containers. 

b. All application equipment, ventilation system, and emission control equipment shall be 

installed, operated, and maintained consistent with the manufacturer’s specifications.

c. Waste solvent, waste solvent residues, and any other waste material that contains reactive 

organic compounds shall be disposed of by one of the following methods:

i. A commercial waste solvent reclamation service licensed by the State of 

California. 

ii. At a facility that is federally or state licensed to treat, store or dispose of such 

waste. 

iii. Recycling in conformance with Section 25143.2 of the California Health and 

Safety Code. 

d. All covers, valves, drain plugs, and other closure devices designed to reduce polyester 

resin material and cleaning material evaporation shall not be removed or opened except 

to process work or to perform monitoring, inspections, maintenance, or repairs that 

require the removal of the covers or other closure devices. 
 

Santa Barbara County APCD Rule 349 349 - 9 April 27, 1993[date of amended rule adoption]

e. Any spills of polyester resin materials or cleaning materials shall be wiped up 

immediately and the used absorbent material (e.g., cloth, paper, sand, sawdust, etc.) shall 

be stored in closed containers that are handled in accordance with Section D.3.a. 

f. The handling and transfer of polyester resin materials and cleaning solvents to or from 

enclosed systems, vats, waste containers, and other cleaning operation equipment that 

hold or store fresh or spent coatings and cleaning solvents shall be conducted in such a 

manner to minimize spills. 

g. Containers used to store polyester resin material, solvent, or any waste material that 

contains reactive organic compounds subject to this rule shall be marked or clearly 

labeled indicating the name of the material they contain.

E. Compliance Provisions and Test Methods 

 1. Compliance with Section D.1.a or D.1.b Polyester resin material monomer contents shall be 

determined measured using ASTM method D2369-8195, “Standard Test Method for Volatile 

Content of Coatings,” ASTM International. Material tested shall be non-catalyzed. 

 2. Compliance with Section D.1.c The weight loss from reactive organic compound emissions shall 

be determined measured by laboratory static tests, “Static Method for Determination of Volatile 

Emissions from Polyester and Vinyl Ester Resins,” as described in Attachment A. 

 3. Capture efficiency determinations The capture efficiency for reactive organic compound emissions 

required in Section D.1.dshall be based on criteria set forth by EPA in 40 CFR 52.741 determined 

by verifying the use of a Permanent Total Enclosure and 100 percent capture efficiency as defined 

by Environmental Protection Agency Method 204, “Criteria for and Verification of a Permanent 

or Temporary Total Enclosure.” Alternatively, if an Environmental Protection Agency Method 

204 defined Permanent Total Enclosure is not employed, capture efficiency shall be determined 

using a minimum of three sampling runs subject to data quality criteria presented in the 

Environmental Protection Agency technical guidance document “Guidelines for Determining 

Capture Efficiency, January 9, 1995.” Individual capture efficiency test runs subject to the 

Environmental Protection Agency technical guidelines shall be determined by: 

a. The Temporary Total Enclosure approach of Environmental Protection Agency Methods 

204 through 204F; or 

b. The South Coast Air Quality Management District “Protocol for Determination of 

Volatile Organic Compounds (VOC) Capture Efficiency,” May 1995.

 4. Control efficiency determinations The control device efficiency for reactive organic compound 

emissions required in Section D.1.dshall be made using EPA Method 25 or 25A. Gas flow rate 

measurements in pipes or small ducts shall be made using EPA Method 2A. determined by 

Environmental Protection Agency Methods 25, 25A, the South Coast Air Quality Management 

District Method 25.1, “Determination of Total Gaseous Non-Methane Organic Emissions as 

Carbon,” February 1991, or the South Coast Air Quality Management District Method 25.3, 

“Determination of Low Concentration Non-Methane Non-Ethane Organic Compound Emissions 

from Clean Fueled Combustion Sources,” March 2000, as applicable. Environmental Protection 

Agency Test Method 18 or Air Resources Board Method 422, “Exempt Halogenated VOCs in 

Gases,” September 12, 1990, shall be used to determine emissions of exempt compounds.

5. Solvent reactive organic compound content shall be measured by the Environmental Protection 

Agency Reference Method 24, its constituent methods, or an equivalent method approved by the 

Environmental Protection Agency, the Air Resources Board, and the Control Officer. The 

determination of exempt compounds shall be performed in accordance with ASTM D 4457-1991, 
 

Santa Barbara County APCD Rule 349 349 - 10 April 27, 1993[date of amended rule adoption]

“Standard Test Method for Determination of Dichloromethane and 1,1,1-Trichloroethane in Paints 

and Coatings by Direct Injection into a Gas Chromatograph,” ASTM International. Alternatively, 

determination of exempt compounds may be performed in accordance with the South Coast Air 

Quality Management District Method 303-91, “Determination of Exempt Compounds,” August 

1996. The reactive organic compound content of materials containing 50 grams of reactive 

organic compound per liter or less shall be determined by the South Coast Air Quality 

Management District Method 313-91, “Determination of Volatile Organic Compounds by Gas 

Chromatography-Mass Spectrometry,” June 1993, or any other test methods approved by the 

Environmental Protection Agency, the Air Resources Board, and the Control Officer. 

6. The capture efficiency for toxic air contaminant emissions that are not reactive organic 

compounds shall be determined by using the methods described in Section E.3 modified in a 

manner approved by the Control Officer to quantify the mass of liquid or gaseous reactive organic 

compounds and/or toxic air contaminants. 

7. The control device efficiency for toxic air contaminant emissions that are not reactive organic 

compounds shall be determined using: 

a. an Environmental Protection Agency approved test method or methods, or 

b. in the case where there is no Environmental Protection Agency approved test method, a 

Control Officer approved detection method applicable for each target toxics specie. 

c. the Control Officer may require more than one test method on any emission control 

device where necessary to demonstrate that the overall efficiency is at least 85 percent by 

weight in reducing emissions of reactive organic compounds and/or toxic air 

contaminants. Any technique to convert “parts per million by volume” test method 

results to either 1) “parts per million by weight,” or 2) “mass emission rates” (e.g., 

pounds per hour) shall first be approved by the Control Officer and, if such approval is 

not provided, then the technique shall not be used to show compliance with this rule.

8. Emissions of reactive organic compounds from the exhaust of an emission control system shall be 

measured by the Environmental Protection Agency Method 25, in combination with 

Environmental Protection Agency Method 18 or the California Air Resources Board Method 422, 

“Exempt Halogenated VOCs in Gases,” September 12, 1990 (to determine emissions of exempt 

compounds). 

9. When more than one test method or set of test methods are specified for any testing, a test result 

showing an exceedance of any limit of this rule shall constitute a rule violation. 

10. The Environmental Protection Agency test methods in effect on [date of amended rule adoption] 

shall be the test methods used to meet the requirements of this rule. 

F. Recordkeeping 

 Any person subject to this rule shall comply with the following requirements:. Any owner or operator of 

any stationary source comprised of more than one facility may comply with the following requirements on 

a facility basis. 

 1. A person shall mMaintain a current list file of resins and cleaning all reactive organic compoundcontaining materials in use at the stationary source subject to this rule. which The file shall 

provides all of the data necessary to evaluate compliance and shall include, including the 

following information, as applicable: 
 

Santa Barbara County APCD Rule 349 349 - 11 April 27, 1993[date of amended rule adoption]

 a. the type of resin, catalyst, and cleaning materials used (e.g., brand name, stock 

identification number).; 

 b. the weight percent of ROC in each of the polyester resin materials, and the grams of ROC 

per liter for the cleaning materials.if applying polyester resin materials in spraying 

operations, indicate the spray application method used (e.g., airless, air-assisted airless, 

etc.); 

 c. for approved vapor suppressed resins, the weight loss (grams per square meter) during 

resin polymerization, the monomer percentage, and the gel time for each resin.; 

d. if mixing solvents, specific solvent mixing data (e.g., component volumes or weights) of 

each component for each batch sufficient to determine the mixture’s reactive organic 

compound content; 

e. the actual as applied reactive organic compound content of the solvent used and, when 

not using a closed mold system, the corresponding monomer content limits from Sections 

D.1.a, b, or c, and the actual as applied monomer contents; or if complying using a vapor 

suppressant, the actual polyester or vinyl ester resin weight loss rate of the materials 

used; and 

f. current polyester resin material and solvent manufacturer specification sheets, Material 

Safety Data Sheets, product data sheets, or air quality data sheets, which list the reactive 

organic compound content of each material in use at the stationary source subject to this 

rule. Compliance with this provision may be done by ensuring the manufacturer’s 

specifications are listed on the product container. 

2. Maintain records for each reactive organic compound-containing material purchased for use at the 

stationary source. The records shall include, but not be limited to, the following: 

a. material name and manufacturer identification (e.g., brand name, stock identification 

number); and 

b. material type (e.g., polyester resin material type as specified in Table 349-1, cleanup 

solvent, etc.). 

3. Maintain records of the disposal method each time waste solvent, or waste solvent residue, or 

other waste material that contain reactive organic compounds is removed from the stationary 

source for disposal. 

4. For each material listed in response to Section F.1.a, maintain, at a minimum, on a monthly basis 

for compliant material and on a daily basis for noncompliant material, a record of the following: 

a. volume used (gallons per day, gallons per month); 

b. polyester resin material as-applied weight percent of monomer and the cleaning material 

reactive organic compound content (grams per liter or pounds per gallon); 

c. polyester resin material reactive organic compound emission factors (pounds of reactive 

organic compounds per pounds of monomer used or pounds of reactive organic 

compounds per gallon); and 

d. resulting reactive organic compound emissions (pounds per day, pounds per month). 
 

Santa Barbara County APCD Rule 349 349 - 12 April 27, 1993[date of amended rule adoption]

25. Any person using add-on For any stationary source that uses emission control equipment to meet 

the requirements of this rule, shall maintain daily records of key operating parameters values and 

maintenance procedures that verify demonstratethat the control equipment was operating properly 

for each day of operation continuous operation and compliance of the emission control system 

during periods of emission producing activities shall be maintained. These parameters shall 

include, but not be limited to: 

a. Hours of operation; 

b. All maintenance work that requires the emission control system to be shut down; and 

c. All information needed to demonstrate continuous compliance with Section D.1.f, such as 

temperatures, pressures, and/or flow rates. 

. 

6. Any person claiming an exemption under Section B.1 shall maintain, at a minimum, monthly 

records for compliant material and daily records for noncompliant material of styrene volumes 

used in gallons per day and/or gallons per month to support the claim of exemption. 

37. Such records shall be retained for the previous 24 month period and be available to the District 

upon request.Any records required to be maintained pursuant to this rule shall be kept on site for 

at least 2 years unless a longer retention period is otherwise required by state or federal 

regulation(s). Such records shall be kept on site and be readily available for inspection and review 

by the District.

G. Compliance Schedule 

A person who is subject to the requirements of this determination shall be in compliance by April 27, 1994. 

Any person who owns or operates any polyester resin operation equipment subject to this rule shall meet 

the following compliance schedule: 

1. By [30 days from the date of amended rule adoption], comply with Section D.3, General 

Operating. 

2. By [six months from the date of amended rule adoption], comply with the recordkeeping 

provisions in the following Sections: 

a. F.1.d - mixing data, 

b. F.1.e - solvent reactive organic compound content data, polyester resin material monomer 

contents (when not using a closed mold system), and/or actual weight loss rate data 

(when using a vapor suppressant), 

c. F.1.f - manufacturer specification sheets, Material Safety Data Sheets, air quality data 

sheets, or manufacturer specification listings on product container, 

d. F.2 - purchase records, 

 

e. F.3 - waste disposal records, and 

f. F.4 - polyester resin material reactive organic compound emission factor records and 

daily records for noncompliant materials. 

3. By [12 months from the date of amended rule adoption], comply with the Section H and Section J 

requirements. 
 

Santa Barbara County APCD Rule 349 349 - 13 April 27, 1993[date of amended rule adoption]

4. By [24 months from the date of amended rule adoption], comply with any applicable Section D 

provisions that have a phased-in effective date. 

5. By [date of amended rule adoption], comply with all other provisions of this rule. 

H. Requirements – Solvent Cleaning 

Section H requirements apply to any person performing solvent cleaning associated with polyester resin 

operations, including, but not limited to, use of wipe cleaning cloths, hand-held spray bottles, squirt bottles, 

aerosol products, and the cleaning of application equipment. The following requirements become effective 

[one year from the date of amended rule adoption] and are in addition to the general operating requirements 

specified in Section D.3. 

1. Solvent Requirements. Except when using an emission control system that meets the 

requirements of Section D.1.e, no person shall use any solvent to perform solvent cleaning which 

exceeds the applicable grams of reactive organic compound per liter of material limit specified in 

Table 349-2. 

Table 349-2: Reactive Organic Compound Content Limits for Solvent Cleaning 

SOLVENT CLEANING ACTIVITY 

ROC Limit, 

grams of ROC per liter of material 

(pounds of ROC per gallon) 

(a) Product Cleaning During Manufacturing Process or 

Surface Preparation for Coating Application 

25 

(0.21) 

(b) Repair and Maintenance Cleaning 25 

(0.21) 

(c) Cleaning of Polyester Resin Application Equipment 25 

(0.21) 

I. Reporting Requirements 

Submittal of an annual report to the District is required if a person holds a permit for equipment subject to 

the requirements of this rule. The annual report shall be due March 1 and it shall contain the following 

information for the previous calendar year: 

1. monthly totals (gallons) of compliant and noncompliant material used based on the records 

required by Section F.4, 

2. annual totals (gallons) based on each of the polyester resin materials’ and cleaning materials’ 

monthly data, 

3. if claiming the Rule 349.B.1 exemption, monthly totals of styrene (gallons) used per Section F.6 

and the yearly total amount (gallons) of styrene used, and 

4. name and address of the company or agency and the Permit to Operate number that the polyester 

resin operation is subject to. 
 

Santa Barbara County APCD Rule 349 349 - 14 April 27, 1993[date of amended rule adoption]

J. Requirements - Solvent Cleaning Machine

Any person who owns, operates, or uses any solvent cleaning machine shall comply with the applicable 

provisions of Rule 321, Solvent Cleaning Machines and Solvent Cleaning. 
 

Santa Barbara County APCD Rule 349 Attachment A - 1 April 27, 1993[date of amended rule adoption]

 ATTACHMENT A 

 STATIC METHOD FOR DETERMINATION OF VOLATILE EMISSIONS FROM 

 POLYESTER AND VINYL ESTER RESINS 

1. PURPOSE 

 1.1 This test is designed for the determination of volatile organic compound emissions of polyester 

and vinyl ester resins as received from the manufacturer, according to requirements of California's 

South Coast Air Quality Management District (SCAQMD) proposed Rule 1162 amendment 

published July 17, 1990Method 309-91, Determination of Static Volatile Emissions, revised 

February 1993.

 1.2 This test allows fabricators using polyester and vinyl ester resins to monitor volatile organic 

compound emissions (principally styrene monomer) from resins used in the fabrication process. 

The results are to be reported as volatile organic compound losses in grams per square meter 

(gm/m2

). 

2. METHOD 

 The weight of a one gallon can lid filled with 100 gm grams of resin is accurately measured over a 

period of time. The measurement is made on resin catalyzed with peroxide initiators to determine 

weight losses attributed to monomer and other volatile organic compound emissions. 

3. EQUIPMENT REQUIREMENTS 

 3.1 Controlled environment at 25.0 C degrees Celsius and humidity of 50% R.H percent relative 

humidity. If controlled environment is not available, report condition under which measurements 

are made. 

 3.2 Balance with an accuracy of 0.01 gmgram. 

 3.3 Draft free enclosure for balance. This can be achieved by placing the balance in a four sided 

enclosure that extends a minimum of eight inches above the top of the balance. 

 3.4 Gallon can lid with deep form sufficient to contain 100 gm grams of resin, having a normal 

diameter of 14.5 cmcentimeters. 

 3.5 Certified or calibrated thermometer capable of measurements accurate to 1 degree CCelsius. 

 3.6 Constant temperature bath controlled at 25 °C degrees Celsius to adjust resin temperature to 

25°C degrees Celsius. 

 3.7 Timer - capable of recording time to 0.1 minute. 

 3.8 Paper clip - bent to approximately 90° degree angle. 

 3.9 Syringe or pipette accurate to 0.1 ml milliliter for peroxide catalyst addition. 
Santa Barbara County APCD Rule 349 Attachment A - 2 April 27, 1993[date of amended rule adoption]

4. PROCEDURE 

 4.1 Weigh out 200 gm grams of prepromoted resin into a suitable dry and clean container. Wax cups 

should not be used for this test. 

 4.2 Cover container and place in constant temperature bath and adjust resin temperature to 25°C 

degrees Celsius. 

 

 4.3 Place balance in draft free enclosure. 

 4.4 Clean gallon lid with solvent, wipe dry and air dry and measure diameter to the nearest 0.1

cmcentimeter. 

 4.5 Place gallon can lid on an inverted paper or plastic cup mounted on the balance pan. Position bent 

paper clip in the center of the gallon can lid. Record TARE WEIGHT to 0.01 gmgram. 

 4.6 Take container with resin from water bath and add appropriate volumetric or weight measure of 

catalyst using syringe or pipette. Start timer. (continued)

 4.7 Using stirring rod or thermometer, mix in catalyst for one minute. 

 4.8 Pour 100.0 +/- plus or minus 0.5 gm gram of catalyzed resin into can lid and record weight to +/- 

plus or minus 0.01 gmgram. This is the INITIAL WEIGHT. 

 4.9 Using paper clip, determine when resin has hardened sufficiently to allow resin or lid to be lifted

or the gel to be torn. 

 4.10 Record this as gel time. 

 4.11 Allow resin to harden in can lid and reweigh every 15 minutes until concurrent weighing agrees to 

within 0.05 gmgram. Record this as FINAL WEIGHT to +/- plus or minus 0.01 gmgram. 

 4.12 Procedure should be repeated until duplicate samples agree to the nearest 5 gm per m2

grams per 

meter2.

5. CALCULATION 

 5.1 Volatile Organic Compound Emissions per Square Meter 

 (d/2)2

 x 3.14

Area of Gallon Can Lid in m2 = 

 10,000 cm2 / m2 

Area of Sample in Square Meter = (d/2)2

 * 3.14 

Where: d = diameter of the gallon can lid in centimeters (cm) 

3.14 = value of Pi 

cm2 = square centimeters 

m2 = square meters

 Volatile Organic Compound Losses, Grams per Square Meter =

 INITIAL WEIGHT - FINAL WEIGHT 

 Area of Sample Gallon Can Lid in Square Meters 
Santa Barbara County APCD Rule 349 Attachment A - 3 April 27, 1993[date of amended rule adoption]

 5.2 Percent Volatile Organic Compound Emission = 

 INITIAL WEIGHT - FINAL WEIGHT x 100 

 INITIAL WEIGHT - TARE WEIGHT 

6. REPORTING REQUIREMENTS 

 6.1 Ambient temperature and humidity. 

 6.2 Resin identification and batch number. 

 6.3 Initiator system and amounts used. 

 6.4 Volatile organic compound losses as grams per square meter. 

 6.5 Percent volatile organic compound emission. 

 

 6.6 Gel time under conditions of test. 

 APPROVED AS TO FORM: 

 

 DENNIS A. MARSHALL 

 SANTA BARBARA COUNTY COUNSEL 

 By____________________________ 

 Deputy 

 Attorneys for the Santa Barbara County 

 Air Pollution Control District