# Eastern Kern Air Pollution Control District



# Rule 432

POLYESTER RESIN OPERATIONS

FINAL STAFF REPORT

March 13, 2014

Prepared by 

### Glen Stephens, P.E.

Air Pollution Control Officer

Eastern Kern Air Pollution Control District 2700 “M” Street, Suite 302 Bakersfield, California 93301 (661) 862-5250  www.kernair.org

### Table of Contents

I. BOARD AD OPTION .......................................................................... 1

II. INTROD UCTION ............................................................................... 1

III. BACKG ROUND ................................................................................. 1

IV. RULE DEVE LOPMENT ..................................................................... 3

V. VOC RED UCTIONS .......................................................................... 3

VI. REQUIR EMENTS.............................................................................. 3

VII. EXEMPT IONS ................................................................................... 5

VIII. ADMINISTRATI VE REQUIREM ENTS............................................... 6

IX. RULE CONSISTE NCY ANAL YSIS.................................................... 6

X. ECONOMIC IMPACTS ...................................................................... 8

XI. ENVIRONMEN TAL IMPAC TS ........................................................... 8

XII. SOCIOECONO MIC IMPAC TS........................................................... 9

XIII. RULE APPRO VAL PROC ESS .......................................................... 9

TABLE 1: VOC CONTENT LIMI TS FOR OPEN MOLDING....................... 4

TABLE 2: VOC CONTENT LI MITS FOR SO LVENTS ............................... 5

APPENDIX A RULE 432, POL YESTER RESIN OPERATIONS

APPENDIX B RESPONSE TO COMMENTS432 Final Staff Report

I. BOARD ADOPTION

Rule 432, Polyester Resin Operations was adopted by the Eastern Kern Air
Pollution Control District (District)’s Governing B oard on March 13, 2014 at its regular Board meeting in Rosamond California.

Rule 432 became effective and enforceable upon adoption. A copy of the Rule
has been submitted to the California Air Re sources Board (ARB) for their review
and then to be forwarded to the U.S. En vironmental Protection Agency (EPA) for
inclusion into the State Im plementation Plan (SIP).

II. INTRODUCTION

Rule 432 is designed to reduce volatile organic compound (VOC) emissions from polyester resin used in the manufacture of a variety of fi berglass composite products. Fiberglass composite produc ts produced in the District include aerospace manufacturing, st orage tank insulation, and electrical vault manufacturing. Rule 432 also provides administrative requirements for recording and measuring VOC emissions.

On November 6, 2013 the District held a public rule development workshop at the Mojave Veteran's Building in Mojave, CA. At this workshop District staff presented proposed Draft Rule 432, Polyes ter Resin Operations. The District submitted copies of the proposed rule to ARB and EPA for an initial review prior to the workshop. A 30-day public re view and comment period followed the workshop.

District received comments and sugges ted changes from EPA, ARB, and industry. District considered all comments and suggested changes.

Appendix A is a copy of Adopted Rule 432, Polyester Resin Operations.

Appendix B is the District’s Response to Comments following the November 6, 2013 public workshop held at the Mojave Veteran’s Center in Mojave, CA.

II. BACKGROUND

The Clean Air Act (CAA) as amended in 199 0 requires that St ate Implementation Plans (SIP's) for certain ozone nonattainment areas be revised to require implementation of Reasonably Available Control Technology (RACT) to limit
VOC emissions. The U.S. Environment al Protection Agency (EPA) defines
RACT as the lowest emission limitation that a particular source is capable of meeting by the application of control technology that is reasonably available considering technological and economic feasibility . Section 183(c) of the CAA requires the EPA Administrator to identify c ontrols for all categories of stationary
sources of VOC emissions that has the potential to emit 25-tons per year (tpy).

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Polyester Resin Operations is a class of stationary source that can emit 25-tpy of
VOC emissions.

In 2008 EPA publis hed document number EPA-453/R-08-004 (Control Techniques Guidelines for Fiberglass Boat Manufacturing Materials). The Control Techniques Guidelines (CTG ) for Fiberglass Boat Manufacturing Materials provides available controls, recommended control options, and cost
effectiveness for recommended control options for the fiberglass boat manufacturing industry. This CTG is intended to provide State and local air pollution control authorities with an info rmation base for proceeding with analyses of RACT for their own regulations. No Federal law or regulation precludes a district from requiring more stringent controls than those recommended as
RACT.

There are currently no boat manufacturing operations wit hin the District, however polyester resin operations are a growi ng class of source in the aerospace industry. Several aerospace companies a nd other industries within the District’s jurisdiction utilize or will util ize polyester resin operations. Therefore, the District will proceed with developing a Polyester Resin Operations rule.

Other District Rul es and Regulations

There are 35 air pollution control/managem ent districts in California. The following 17 districts have Polyester Resin rules:

Air District Rule/Regulation No.

Antelope Valley AQMD Rule 1162 Bay Area AQMD Regulation 8, Rule 50 Butte County AQMD Rule 232 Colusa County APCD Regulation 2, Rule 37 El Dorado County AQMD Rule 240 Glenn County APCD Section 101
Mojave Desert AQMD Rule 1162 Placer County APCD Rule 243

Sacramento Metro AQMD Rule 465 San Diego County APCD Rule 67.12 San Joaquin Valley APCD Rule 4684 Santa Barbara County APCD Rule 349 Shasta County APCD Regulation 3, Rule 13

South Coast AQMD Rule 1162 Tehama County APCD Regulation 4, Rule29 Ventura County APCD Rule 74.14

Yolo-Solano AQMD Regulation 2, Rule 30

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In order to promote regulat ory uniformity throughout Ke rn County, Rule 432 is based on San Joaquin Air Pollution Cont rol District’s (SJVAPCD) Rule 4684, Polyester Resin Operations amended August 18, 2011.

III. RULE DEVELOPMENT

The purpose of this Rule is to limit VOC emissions from polyester resin operations and related cleaning with, st orage of, and disposal of solvents and waste solvent materials. The Rule applies to commercial and industrial polyester resin operations. Polyester resin operati ons is defined in this Rule as the production or rework of products by mixi ng, pouring, hand layup, impregnating, injecting, forming, winding, spraying, and/or curing with fiberglass, fillers, or any other reinforcement materials and associated cleanup.

IV. VOC REDUCTIONS

ARB emissions inventory s hows state-wide VOC emissions of 0.02 tons of VOC per day for this industry. Rule 432 prov ides a variety of VOC limits on monomer content. These are the primary control r equirements in the rule (see Section IV of Rule 432). Although Rule 432 only applies to a small number of sources located within the District, some degree of VOC emissions reductions will be accomplished and contribute to the Distr ict's goal of achieving attainment.

V. REQUIREMENTS

Section IV, Requirements of Rule 432 specifies the required material VOC content limits that would be effective upon full implementation of the rule. VOC limits are equivalent to those listed in MDAQMD, SJVAPCD and SCAQMD polyester resin rules. However, staff has added a 6-month full compliance
schedule to allow time for rule disseminat ion and for any existing stocks of older materials to be depleted. Staff believes compliance should not be an issue because most materials currently being used within the District are already compliant with MDAQMD, SCAQMD, and SJVAPCD VOC limits.

A. Table of Standards

For open molding process, owner/operator s shall use materials that comply with the weighted average monomer VOC content limits listed in Table 1 below. (See Section IV, Requirements, Table 1 of Rule 432)

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TABLE 1

VOC CONTENT LIMITS FOR OPEN MOL DING RESIN AND GEL COAT

Compliant Materials Weighted Average Monomer

Material Weight Percent Limit

a. General Purpose Resin

 Marble Resin 10% or 32%, as supplied, with no fillers

 Solid Surface 17%

 Tub/Shower Resin 24% or 35%, as supplied, with no fillers

 Lamination Resin 31% or 35%, as supplied, with no fillers

b. Tooling Resin

 Atomized (spray) 30%

 Non-atomized 29%

c. Specialty Resin

 Fire Retardant Resin 38%

 High Strength Materials 40%

 Corrosion Resistant Resin 48%

d. All Other Resins 35%

e. Tooling Gel Coat 40%

f. Pigmented Gel Coat

 White and Off White 30%

 Non-White 37%

 Primer 28%

g. Clear Gel Coat

 Marble Resin 40%

 Other Resin 44%

h. Specialty Gel Coat 48%

B. Additional Polyester R esin Operation Requirements

 In addition to complying with Table of Standards, the non-monomer VOC content of each resin and gel coat s hall not contain more than 5 percent by weight of the resin or gel coat;

 Use resin containing a vapor suppress ant, such that the weight loss from
the VOC emissions does not exc eed 50 grams per square meter of exposed surface during resin polymerization;

 Use a closed-mold system; or

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 Install and operate a VOC emissions c ontrol system that has 90% control efficiency or control emissions to a limit equivalent to the level achieved by
the Table of Standards.

C. Equipment Requirements

Spray application of polyester resin shal l only be performed using airless, air assisted airless, high-volume, low-pr essure (HVLP) spray equipment, or electrostatic spray equipment

D. Organic Solvent Use and Storage Requirements

An operator shall not use organic solvents for cleaning operations that exceed
the VOC content limits listed in T able 2, below. (See Section IV, Requirements, Table 2 of Rule 432)

TABLE 2

VOC CONTENT LIMITS FOR ORGANIC S OLVENTS

Type of Solvent Cleaning Operation VOC Content Limit Grams of VOC/liter of material (lb/gal)

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)

An operator shall store or dispose of all uncured polyester resin materials, fresh or spent solvents, waste solvent cleaning materials such as cloth,paper, etc., coatings, adhesives, catalysts, and thinners in self-closing, nonabsorbent and non-leaking containers. The containers shall remain closed at all times except when depositing or removing the contents of the containers or when the container is empty.

VI. EXEMPTIONS

Rule 432 exempts low-emitting operations su ch as facilities that use less than 20 gallons per month of polyester resin, provided the operator keeps the records required by the rule to demons trate exemption status.

The solvent cleaning provisions do not apply to the following applications to cleaning of solar cells, laser hardware, scientific instruments, high precision optics, laboratory tests and analyses , or bench scale or research and development projects.

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VII. ADMINISTRATIVE REQUIREMENTS

Rule 432 has following recordkeeping prov isions that require an operator to

maintain:

 Daily records of the type, quantity, and VOC content of all resins, gel coats, fillers, catalysts, and cleaning materials (including cleaning solvents) used in each operation at the facility.

 Records showing the weight loss per square meter during resin polymerization for each vapor-suppressed resin.

 VOC Emission Control System record s: An operator using a VOC emission control system pursuant to Section IV.A.4 shall maintain daily records of key system operating parameters to de monstrate continuous operation andcompliance of the VOC emission control system during periods of emissionproducing activities. Key system operati ng parameters are those parameters necessary to ensure compliance, includ ing, but not limited to, temperature, pressure drop, and air flow rate.

 An operator claiming exemption under Se ction III shall maintain records of polyester materials usage to support the claim of exemption.

 The Rule contains a number of specific test methods that must be followed in order to ensure compliance with the rule. See Section V.B. of Appendix A.

Records required by the Rule shall be re tained for a minimum of five (5) years and made available on site during normal business hours to the APCO, ARB, or EPA upon request.

VIII. RULE CONSISTENCY ANALYSIS

Pursuant to Section 40727.2 of the Califor nia Health and Safety Code, prior to adopting, amending, or repealing a rule or regulation, the District is required to perform a written analysis that identifies and compares the air pollution control elements of Rule 432 with the correspondi ng elements of existing or proposed District and EPA rules, regulations, and guide lines that apply to the same source category. Rule elements that were analyzed are emission limits or control efficiency, operating parameters and work practices, monitoring and testing, and recordkeeping and reporting requirements.

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Results of Consisten cy Analysis

District Rules

Facilities subject to Rule 432 could also be subject to the following rules:

Rule 410, Organic Solvents

Rule 410.2, Disposal and Evaporation of Solvents

Rule 410.3, Organic Solvent Degreasing Operations

Rule 410.4, Metal and Plastic Pa rts and Products and Pleasure Crafts

Rule 410.4A, Motor Vehicle and Mob ile Equipment Coating Operations

Rule 410.7, Graphic Arts

Rule 410.8, Aerospace Coati ng and Coatings Operations

Rule 411, Storage of Organic Liquids

Rule 422, New and Modified Stationary Source Review Rule

Rule 423, National Emissions Standar ds for Hazardous Air Pollutants

Rules 410, 410.2, 40.3, 410.4, 410.4A, 410.7, 411, 422, and 423 are not in conflict with, nor are they inconsist ent with the requirements of Rule 432.

EPA Rules and Regulations

A. State and Federal Regulations

There are no currently State regula tions for general polyester resin operations. However, there are Federal regulations t hat include controls for polyester resin operations, including:

 EPA CTG for Fiberglass Boat Manufacturing Materials EPA-453/R-08-004 September 2008. CTG is designed to a ssist air districts in determining RACT for VOC from fiberglass boat manufacturing operations.

 National Emission Standards for Ha zardous Air Pollutants (NESHAP) Subpart HHHH (Wet-Formed Fiberglass Mat Production Plants).

 NESHAP Subpart VVVV (Boat Manufacturing).

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 NESHAP Subparts U, W, OOO, and JJJ (Polymers & Resins I, II, III, and IV, respectively) set forth requi rements for polymer and resin manufacturing operations and not for their use.

Noted: The District currently has no fiberglass boat manufacturing operations within its jurisdiction. Also, Wet-Fo rmed Fiberglass Mat Production Plants are a specific industry used, primarily, in the production of asphalt roofing products. Wet-formed fiberglass mat are used as a substrate for several asphalt roofing products. The Distr ict has no wet-formed fiberglass production plants. Therefore, N ESHAP Subpart HHHH and Subpart VVVV currently do not apply to any operati ons within the District; however, the District will update Rule 432 if a wet-form ed fiberglass mat production plant or a fiberglass boat manufacturing operation is constructed within the District to reflect possible increased control m easures for the new source(s).

B. EPA - Alternative Control Technology (ACT)

Currently no EPA ACT guidance document for general polyester resin operations.

C. Standards of Performance for New Stationary Sources (NSPS)

Currently no NSPS guidance document for general polyester resin operations.

D. National Emission Standards for Hazardous Air Pollutants (NESHAP) and Maximum Achievable Control Technologies (MACTs)

Currently no NESHAP guidance docum ent for general polyester resin operations.

IX. ECONOMIC IMPACTS

Pursuant to California Health & Safety Code (CH&SC) §40920.6(a), the District is required to analyze the cost effectiveness of new rules or rule amendments that implement Best Available Re trofit Control Technology (BARCT) or all feasible measures. Rule 432 employs federal RA CT requirements but not BARCT or all feasible measures, and is therefore not s ubject to the cost effectiveness analysis

mandate.

X. ENVIRONMENTAL IMPACTS

Both the California Environmental Quality Act (CEQA) and ARB policy require an evaluation of the potential adverse envir onmental impacts of proposed projects. The intent of Rule 432 is to protec t public health by reducing the public’s exposure to potentially harmful VOC emi ssions. An additional consideration is

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EKAPCD 3/13/2014 9 the impact that the rule may have on t he environment. District has determined that no significant adverse environmental impacts should occur as a result of adopting Rule 432.

Pursuant to the Section 15061, Subsections (2) & (3) of the CEQA Guidelines, staff will prepared and file a Notice of Ex emption for this project upon adoption.

XI. SOCIOECONOMIC IMPACTS

CHSC Section 40728.5 exempt s districts with a population of less than 500,000 persons from the requirement to asse ss the socioeconomic impacts of adopted rules. Eastern Kern County popula tion is below 500,000 persons.

Remainder of Page Intentionally Left Blank

## APPENDIX A

RULE 432

POLYESTER RESIN OPERATIONS432 Final Staff Report

RULE 410.8 Aerospace Assembly and Coating Operations - Adopted 3/13/2014

I. Applicability

The purpose of this rule is to reduce volat ile organic compounds (VOC) emissions from polyester resin operations. The provisions of th is rule apply to comme rcial polyester resin operations, industrial polyester resin operati ons, and organic solvents (use {including cleaning}, storage, waste, and disposal {off-site transfer}) associated with polyester resin operations.

II. Definitions

A. APCO : Air Pollution Control Officer of th e Eastern Kern Air Pollution Control

District.

B. Application Equipment : Device, including, but not limited to, a spray gun, brush, and roller, used to apply adhe sives, coatings, or inks.

C. ARB : California Air Resources Board.

D. Assembly Adhesive : Chemical material used to join two or more fiberglass, metal, foam, plastic, or wood parts. Assembly adhesives include, bu t are not limited to, methacrylate adhesives and putties made from polyester or vinylester resin mixed with

inert filler or fibers.

E. ASTM : American Society of Testing and Materials International.

F. Atomized Resin Application : Technology that utilizes application equipment that breaks resin into droplets (or aerosol) as it exits application equipment to the surface of the part. Atomized resin application include s, but is not limited to, resin spray guns and resin chopper spray guns.

G. Bench Scale Project : Project (not located at Res earch and Development facility) operated on a small scale, such as one capab le of being located on a laboratory bench

top.

H. Catalyst : Substance is added to a resin to initiate or promote polymerization.

I. CFR : Code of Federal Regulations.

J. Cleaning Materials : Materials including, but not limite d to, materials used for cleaning hands, tools, molds, applicati on equipment, and work areas.

K. Clear Gel Coat : Clear (translucent) gel coating us ed to allow underlying colors or patterns to be visible. Tooling gel coat used to build or repair molds is NOT a clear gel

coat.

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L. Closed Molding Process : Molding process that utilizes pressure to distribute resin through the reinforcing fabric placed between two mold surfaces to either saturate the fabric or fill the mold cavity. Pressure utilized can be one or combination of the following forms: clamping, fluid (hydraulic), vacuum, or atmospheric. Mold surfaces may be rigid or flexible. Closed molding includes, but is not limited to, compression molding with sheet molding compound, in fusion molding, resin injection molding (RIM),vacuum-assisted resin transfer mo lding (VARTM), resin transfer molding (RTM), and vacuum-assisted compression molding. The following are not close molding processes:

1. Processes utilizing a closed mold to comp act saturated fabric or remove air or excess resin from the fabric (such as in vacuum bagging).

2. Open molding steps, such as applicat ion of gel coat or skin coat layer by conventional open molding prior to a closed molding process.

M. Coating : A material applied onto or impre gnated into a substrate for protective, decorative, or functional purposes.

N. Corrosion-Resistant Material : Polyester resin material used to make products for corrosion resistant applications such as tooling, fuel or chem ical tanks, boat hulls, pools and outdoor spas.

O. Cure : Polymerization process where small molecules, called monomers, combine chemically to produce a very large chainl ike or network molecule. Chemicals are transformed from a liquid to a solid state or semisolid state to achieve desired physical properties for the product , including hardness.

P. Cured Coating : Coating that is dry to the touch.

Q. Degreaser : Solvent containing tank, tray, drum, etc. utilized to clean objects. Objects are cleaned by immersion into solvent or exposure to solvent vapor. Objects include, but not limited to, parts, produc ts, tools, machinery, and equi pment. An enclosed spray application equipment cleaning system is not a degreaser.

R. Dissolver : Organic solvent that is added to an adhesive, coating, or ink to melt or to liquefy solid particles.

S. EPA : United States Environmental Protection Agency.

T. Filament Application : Resin application method to an open mold where reinforcement fibers are fed through a resin bath and winding the resin impregnated fibers on a rotating mandrel.

U. Filled Polyester Resin Material : Material formulated by adding compatible filler(s) to polyester resin material(s).

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V. Filler : Inert (non-VOC) substance added to the resin to enhance its mechanical properties or extend its volume. Resin fillers include, but are not limited to, silica, carbon black, talc, mica and calcium carbonate.

W. Fire Retardant Material : Polyester resin material us ed to make products that are

resistant to flame or fire.

X. Fluid Impingement Technology : Spray gun that produces an expanding non-misting curtain of liquid by the impingement of lo w-pressure uninterrupt ed liquid streams.

Y. Gel Coat : Polyester resin topcoat that provid es a cosmetic enhancement and improves resistance to degradation from environmental exposure.

Z. Grams of VOC per Liter of Material : The weight of VOC per volume of material and can be calculated by the following equation:

Ws - Ww - Wec Grams of VOC per liter of material = Vm

Where:

Ws = weight of volatile compounds (grams)

Ww = weight of water (grams)

Wec = weight of exempt compounds (grams)

Vm = volume of material (liters)

AA. High-Strength Material : Polyester resins which have a casting tensile strength of 10,000-psi or more.

BB. High-Volume, Low-Pressure (HVLP) : Spray equipment permanently labeled as such and which is designed and operated between 0.1 and 10 pounds per square inch, gauge, (psig) air atomizing pressure measured dynami cally at the center of the air cap and at the air horns and with liquid supply pressure less than 50 psig.

CC. Lamination Resin : Orthophthalate, isophthalate and dicyclopentadiene (DCPD) resin which is used in composite system made of layers of reinforcement fibers and resins.

DD. Liquid Leak : Visible solvent leak from a containe r at a rate of more than three drops per minute, or a visible liquid mist.

EE. Maintenance Cleaning : Cleaning of tools, forms, molds, jigs, machinery, and equipment (excluding coating, ink and adhe sive application equipment), and the cleaning of work areas where main tenance or manufacturing occurs.

FF. Manual Application : Application of resin to an open mold using a hand layup technique. Components of successive plies of resin-impregnated reinforcement fibers are applied using hand tools su ch as brushes and rollers.

GG. Manufacturing Process : Process of making goods or products by hand or by machine.

HH. Marble Resin : Orthophthalate and modified acr ylic isophthalate resin, which is designed for the fabrication of cast products, such as vanities.

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II. Mold : Cavity or surface where gel coat, resin, and fibers are placed and from which finished fiberglass parts take their form.

JJ. Monomer : Organic compound, such as styrene, th at reacts with uns aturated polyester resins to form a cured polyester resin.

KK. Month : Calendar month.

LL. Neat Resin : Resin that has no added filler.

MM. Non-Absorbent Container : Container made of non-porous material that does not allow the migration of solvents through it.

NN. Non-Atomized Resin Application : Technology that utilizes a pplication equipment that does not break resin into dropl ets (or aerosol) as it exits application equipment to the surface of the part. Non-atomized resin a pplication technology includes, but are not limited to, non-atomizing spray guns, flowcoat ers, chopper flowcoaters, pressure fed resin rollers, resin impregnators , or fluid impingement technology.

OO. Non-Atomized Solvent Flow : Solvents in the form of a liquid stream without the introduction of any propellant.

PP. Non-Atomizing Spray Gun : Spray gun where resin flows in a steady and observable coherent flow, with no droplets formed in th e area that is within the first three (3) inches of the applicator orifice. Droplets may form in the area greater than three (3) inches from the applicator orifice.

QQ. Non-Leaking Container : Container without a liquid leak.

RR. Normal Business Hours : Monday through Friday, 8:00 am to 5:00 pm.

SS. Open Molding Resin and Gel Coat Process : Process where reinforcing fibers and resin are placed in an open-air mold while the rein forcing fibers are saturated with resin. Open molding operations include vacuum ba gs (or similar) used to compress uncured laminate to remove bubbles, excess resin, a nd to achieve a bond between core material

and laminate.

TT. Organic Solvent : The same as “Solvent.”

UU. Organic Solvent Cleaning : Activity, operation, or process, (including surface preparation, cleanup, or wipe cl eaning), performed outside of a degreaser, that uses organic solvents to remove uncured adhesive s, uncured coatings, uncured inks or other contaminants. These operations including, but not limited to, dirt, so il, oil, lubricants, coolants, moisture, fingerprints, and grease, from parts, products, tools, machinery, general work areas and application equipmen t (including coatings, adhesives, and ink spray equipment).

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VV. Pigmented Gel Coat : Opaque gel coat that provides a colored, glossy surface which improves the aesthetic appearance of the produc ts. Pigmented gel coat does not include tooling gel coat used to build or repair molds.

WW. Polyester Resin Materials : Materials including, but not limited to: unsaturated polyester resins such as is ophthalic, orthophthalic, halogenated, Bisphenol-A, vinylester, or furan resins; cross-linking agents; catalysts, gel coats, inhibitors, accelerators, promoters, and any other materials used in polyester resin operations.

XX. Polyester Resin Operations : Production or rework of products by mixing, pouring, hand layup, impregnating, injecting, formi ng, winding, spraying, and/or curing with fiberglass, fillers, or any other reinfo rcement materials and associated cleanup.

YY. Polymer : Chemical compound comprised of a large number of chemical units, formed by chemical linking of monomers.

ZZ. Production Resin : General purpose resin material that is not especially corrosion resistant, fire retardant, high strength, or gel coats.

AAA. Propellant : Gas, including air, in a pressure c ontainer utilized to expel the contents when the pressure is released.

BBB. Repair Cleaning : Solvent cleaning operation or ac tivity carried out during a repair

process.

CCC. Repair Process : Process of returning a damaged or not operating pr operly object to good condition.

DDD. Research and Development : Facility or part of a facility used to development useful materials, devices, systems, or meth ods, including, but not limited to, design, development, and improvement of prot otypes and processes. Research and development does not include the production manufacturing operations.

EEE. Resin : Class of natural or synthetic organi c polymers used to encapsulate and bind together reinforcement fibers in th e construction of fi berglass parts.

FFF. Resin and Gel Coat Operation : Operation in which resi ns or gel coats (including putties or polyputties) is combined with additives (including, but are not limited to, fillers, promoters, or catalysts).

GGG. SCAQMD : South Coast Air Qualit y Management District.

HHH. Skin Coat : Layer of resin and fibers applied over gel coat to protect the gel coat from deformation by the subsequent laminate layers.

III. Small Job : Minor resin or gel coat applica tion project which requires only a very limited amount of materials. Total material use for all small jobs at a facility shall not exceed two (2) gallons a day.

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JJJ. Solid Surface Resin : Resin, used without gel coats, to fabricate homogenous solid surface products.

KKK. Solvent : As defined in Rule 410.3, Organi c Solvent Degreasing Operations.

LLL. Specialty Gel Coat : Gel coat used in conjunction with fire retardant, corrosion resistant or high-strength materials.

MMM. Specialty Resin : Halogenated, furan, bisphenol A, vinyl-ester, or isopht halic resin used to make products for exposure to one or more of the following extreme environmental conditions: corrosive agents, caustic ag ents, acidic agents, or flame (heat).

NNN. Stationary Source : As defined in Rule 210.1 (New and Modified Stationary Source Review Rule).

OOO. Tooling Resin : Resins used to build or repair mo lds (tools) or prototypes (plugs) that comprise the molds.

PPP. Tooling Gel Coat : Gel coat used to build or repair molds (tools) or prototypes (plugs) that comprise the molds.

QQQ. Touch-up : Application of resin or gel coat to correct minor cosmetic imperfections that occur during fabrication or field installations.

RRR. Tub/Shower Resin : Dicyclopentadiene (DCPD), ort hophthalate and isophthalate resins, used to fabricate bath ware products.

SSS. Vapor Suppressant : Substance added to resin to minimize the transfer of monomer vapor into the atmosphere.

TTT. Vinylester Resin : Thermosetting resin containing este rs of acrylic or methacrylic acids having a double-bond and ester linkage sites at the end of the resin molecules.

UUU. Volatile Organic Compound (VOC ): As defined in Rule 102, Definitions.

VVV. Waste Materials : Materials including but not limited to paper or cloth used for cleaning operations, waste resins, or spent cleaning materials.

III. Exemptions

A. The provisions of this rule, excluding reco rdkeeping requirements of Section V.A, shall not apply to any polyester resin operation provided the volume of polyester resin materials used is less than 20 gallons per month.

B. The solvent cleaning provisions of Secti on IV.B.2, Table 1 shall not apply to the following applications:

1. Cleaning of solar cells, laser hardware, scientific instruments, or high precision optics.

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2. Cleaning in laboratory tests and analys es, or bench scale or research and development projects.

IV. Requirements

A. Polyester Resin Operation

1. An operator of a polyester resin operati on shall comply with the following process or control requirements:

Use materials in an open molding process that comply with the weighted average

monomer VOC content limits in Table 1. In addition to complying with Table 1 limits, the non-monomer VOC content of each resin and gel coat shall not contain more than 5 percent by weight of the resin or gel coat; or comply with Sections
IV.A.2, IV.A.3, or IV.A.4.

TABLE 1

VOC CONTENT LIMITS FOR OPEN MOL DING RESIN AND GEL COAT

Compliant Materials Weighted Average Monomer

Material Weight Percent Limit

a. General Purpose Resin

 Marble Resin 10% or 32%, as supplied, with no fillers

 Solid Surface 17%

 Tub/Shower Resin 24% or 35%, as supplied, with no fillers

 Lamination Resin 31% or 35%, as supplied, with no fillers

b. Tooling Resin

 Atomized (spray) 30%

 Non-atomized 29%

c. Specialty Resin

 Fire Retardant Resin 38%

 High Strength Materials 40%

 Corrosion Resistant Resin 48%

d. All Other Resins 35%

e. Tooling Gel Coat 40%

f. Pigmented Gel Coat

 White and Off White 30%

 Non-White 37%

 Primer 28%

g. Clear Gel Coat

 Marble Resin 40%

 Other Resin 44%

h. Specialty Gel Coat 48%

Appendix A A- 7 3/13/2014432 Final Staff Report

2. Use resin containing a vapor suppressant, such that the weight loss from the VOC emissions does not exceed 50 grams per s quare meter of exposed surface during resin polymerization;

3. Use a closed-mold system; or

4. Install and operate a VOC emissions c ontrol system which meets all of the requirements of Sections IV.A.4.a. thr ough IV.A.4.c during periods of emission producing activities:

a. The VOC emission control system sha ll be approved, in writing, by the APCO.

b. The VOC emission control system shall have an overall capture and control efficiency of at least 90 percent by wei ght, demonstrated using the applicable test method(s) in Section V.B.

c. The VOC emission control system sha ll reduce VOC emissions, at all times, to a level that is not greater than the emission which would have been achieved through the use of compliant materials, compliant equipment, or compliant work practices, as applicable. The follow ing equation shall be used to determine if the minimum required overall capture and control efficiency of an emission control system is at an equivalent or greater level of VOC reduction as would be achieved using compliant materials, equipment, or work practices:

VOC LWc 1-(VOC LWn,Max / D n,Max ) CE = x 100 1- VOC LWn,Max x 1- (VOC LWc / D c )

Where:

CE = Minimum Required Overall Capture and Control Efficiency, percent.

VOC LWc = VOC Limit, less water and exempt compounds.

VOC LWn,Max = Maximum VOC content of nonc ompliant coating used in conjunction with a cont rol device, less water and exempt compounds.

D n,Max = Density of solvent, reducer, or thinner contained in the noncompliant coating, containing the maximum VOC content of the multi-component coating.

D c = Density of corresponding solv ent, reducer, or thinner used in the compliant coating system.

5. Resins and gel coats used for touch up, re pair, or small jobs, may have a monomer content limit up to 10% more than the appl icable limit set forth in Table 1. Such resins or gel coats shall only be applie d by a hand-held atomized spray gun which has a container for the resin or gel coat as part of the gun. Resins or gels applied by

Appendix A A- 8 3/13/2014432 Final Staff Report

another m ethod shall comply with the appl icable limit in Table 1. Total material use for all small jobs at a facility shall not exceed two (2) gallons a day.

B. Spray application of polyester resin shall only be performe d using airless, air assisted airless, high-volume, low-pressure (HVLP) spray equipment, or electrostatic spray equipment.

1. High-Volume, Low-Pressure (HVLP) sp ray equipment shall be operated in

accordance with the manufacturer's recommendations.

2. For HVLP spray guns manufactured prior to January 1, 1996, the end user shall demonstrate that the gun meets HVLP spray equipment standards. Satisfactory proof will be either in the form of manuf acturer's published technical material or by a demonstration using a certified air pressu re tip gauge, measuring the air atomizing pressure dynamically at the center of the air cap and at the air horns.

3. A person shall not sell or offer for sale for use within the District any HVLP spray gun without a permanent marking denoting the maximum inlet air pressure in psig at which the gun will operate within the parameters specified in Section II.

C. In lieu of complying with the applicable requirements of IV.B, an operator may install and maintain a VOC emission control system that meets the requirements of Section IV.A.4 around the coating application operation.

TABLE 2

VOC CONTENT LIMITS FOR ORGANIC S OLVENTS

Type of Solvent Cleaning Operation VOC Content Limit Grams of VOC/liter of material (lb/gal)

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)

2. In lieu of complying with the VOC c ontent limits in Table 2, an operator may control VOC emissions from cleaning operations with an APCO-approved VOC emission control system that meets the requirements of Section IV.A.4 for the solvent cleaning operations.

E. Solvent Storage and Disposal

An owner or operator shall store or dispose of all uncured polyester resin materials, fresh or spent solvents, waste solvent clea ning materials such as cloth, paper, etc., coatings, adhesives, catalysts, and thi nners in self-closing, non-absorbent and nonleaking containers. The containers shall re main closed at all times except when depositing or removing the contents of the c ontainers or when the container is empty.

Appendix A A- 9 3/13/2014432 Final Staff Report

V. Administrative Requirements

A. Recordkeeping

An operator subject to this rule shall maintain the following records:

1. Daily records of the type and quantity of all resins, gel coats, fillers, catalysts, and cleaning materials (including cleaning solvents) used in each operation. Records

shall also indicate the amount used and VOC content, in weight percent, of all polyester resin and gel coat materials us ed for touch up, repair, and small jobs.

2. Records of the VOC content, in weight percent, of all polyester resin and gel coat, filler materials, including the weight percent of non-monomer VOC content of the resin and gel coat, used or stor ed at the stationary source.

3. Records of the VOC content of all cleaning materials used and stored at the stationary source as speci fied in Section IV.D.

4. Records showing the weight loss per s quare meter during resin polymerization for each vapor-suppressed resin.

5. VOC Emission Control System records an operator using a VOC emission control system pursuant to Section IV.A.4 to comply with this rule shall maintain daily records of key system operating parameters to demonstrate continuous operation and compliance of the VOC emission contro l system during periods of emissionproducing activities. Key system operat ing parameters are those parameters necessary to ensure compliance, including, but not limited to, temperature, pressure drop, and air flow rate.

6. An operator claiming exemption under S ection III shall maintain records of polyester materials usage to support the claim of exemption.

7. The operator shall retain th e records specified in Sec tions V.A.1 through V.A.6, as applicable, on site for a period of five years, make the records available on site during normal business hours to the APCO, ARB, or EP A, and submit the records to the APCO, ARB, or EPA upon request.

B. Test Methods

The analysis of cleaning materials, polyester resin materials and control efficiency shall be determined by the following methods:

1. The emission rate per square meter of exposed surface during polymerization of Polyester Resins is to be determined using: SCAQMD Method 309 (Static Method

for Determination of Volatile Emissi ons from Polyester and Vinyl Resins Operations), Attachment A, 1/8/91.

2. Determination of Overall Capture and C ontrol Efficiency of VOC Emission Control Systems:

Appendix A A- 10 3/13/2014432 Final Staff Report

a. The capture efficiency of a VOC emi ssion control system's collection device(s) shall be determined according to EPA's "Guidelines for Determining Capture Efficiency," January 9, 1995 and 40 CFR 51, Appendix M, Test Methods 204- 204F, as applicable, or any other me thod approved by EPA, ARB, and the

APCO.

b. The control efficiency of a VOC em ission control system's VOC control device(s) shall be determined using EPA Test Methods 2, 2A, or 2D for measuring flow rates and EPA Test Me thods 25, 25A, or 25B for measuring total gaseous organic con centrations at the inlet and outlet of the control device(s). EPA Method 18 or ARB Method 422 shall be used to determine the emissions of exempt compounds.

c. For VOC emission control systems that consist of a single VOC emission collection device connected to a sing le VOC emission control device, the overall capture and control efficiency sh all be calculated by using the following equation:

[ CE Capture X CE Control ] CE Capture and Control = 100

Where:

CE Capture and Control = Overall Capture and Control Efficiency, in percent.

CE Capture = Capture Efficiency of the collection device, in percent.

CE Control = Control Efficiency of the control device, in percent.

3. The monomer content of uncatalyzed resi n materials is to be determined using ASTM D2369-87 (Standard Test Method fo r Volatile Content of Coatings) or SCAQMD Test Method 312.

4. The VOC content of cleaning materials shall be determined using EPA Method 24 (40 CFR Part 60, Appendix A).

5. Determination of emissions of VOC from spray gun cleaning systems shall be made using SCAQMD "General Test Method fo r Determining Solvent Losses from Spray Gun Cleaning Systems," October 3, 1989.

6. The transfer efficiency of alternativ e coating application methods shall be

determined in accordance with the SC AQMD method "Spray Equipment Transfer Efficiency Test Procedure for Equipment User," May 24, 1989.

C. Multiple Test Methods

When more than one test method or set of test methods is specified for any testing, a violation of any requirement of this rule established by any one of the specified test

methods or set of test methods shall constitute a violation of this rule.

Appendix A A- 11 3/13/2014432 Final Staff Report

Appendix A A- 12 3/13/2014

V. Compliance Schedule

A. New Sources

1. Owners or Operators of any facility propos ing to install polyes ter resin operations and required to comply with Section IV of this rule shall obtain an Authority to Construct (ATC) in accordance with Rule 210.1 prior to installation or operation of any polyester resin operation.

2. Owners or Operators of any facility w ith polyester resin operations exempt by

Section III.A of this rule shall maintain records of polyester resin use upon initial operations.

B. Existing Sources

1. Owners or Operators of any facility w ith polyester resin operations required to comply with Section IV of this rule shall obtain a valid Permit to Operate (PTO) or an Authority to Construct (ATC), and sha ll apply for an ATC within 180-days from the adoption of this Rule.

2. Owners or Operators of any facility w ith polyester resin operations exempt by

Section III.A of this rule shall commence ma intaining records of polyester resin use within 180 days of this rule adoption.

3. Owners or operators with valid PTO(s), required to comply with Section IV of this

rule shall obtain shall be in full compliance within 12 months after rule adoption.

Remainder of Page Intentionally Left Blank

## APPENDIX B

RULE 432

POLYESTER RESIN OPERATIONS

RESPONSE TO COMMENTS432 Final Staff Report - Response to Comments

Appendix B B- 1 3/13/2014 On November 6, 2013 the District held a public rule development workshop at the Mojave Veteran's Building in Mojave, Calif ornia to present proposed Draft Rule 432, Polyester Resin Operations. The District submitted copies of the proposed Draft Rule to the Air Resources Board (ARB) and the Region IX office of the U.S. Environmental Protection Agency (EPA) in October, 2013 for an initial 30-day

review.

Upon completion of review EPA offe red comments and suggested changes to District staff regarding proposed Draft Rule 432. ARB did not provide comments or suggested changes but responded to the District that they would wait to review the rule upon submission of the final draft.

Industry representatives pr esent at the 11/6/2013 works hop asked various questions regarding the proposed Draft Rule, however, no industry representatives submitted written comments within 30-days following the wor kshop. Appendix B addresses comments, questions, and suggested changes r egarding proposed Draft Rule 432.

As the only comments for Rule 432 were received from EPA, Appendix B includes EPA comments and changes to the made to t he staff report and rule based on the

EPA comments.



### I. EPA COMMENTS

A. Staff Report

1. The October 16, 2013 staff report (page 7, Section VII. A., last sentence) - Please clarify the intent of this statem ent or eliminate it: “Therefore, no State or Federal regulation will apply directly to the District’s Polyester Resin Operations rule.”

2. The staff report stat es that there are curr ently no fiberglass boat manufacturing operations or wet-formed ma t production plants in the District (pages 2, 7). However, should such a facility move to the District, EPA would expect the District to update its ru les to reflect the new source(s).

B. District’s Response to EPA Comments to Staff Report

1. In regards to EPA comment listed above A. 1: the last sentence of Section VII was removed, as the statement was clearly a typographical error.

2. In regards to EPA comment listed above A.2, the Staff Report added the following wording:

The District has no wet-formed fiberglass production plants. Therefore, NESHAP Subpart HHHH and Subpart VVVV currently do not apply to any operations within the District; however, the District will update Rule 432 if a wet-formed fiberglass mat production plant or a fiberglass boat manufacturing operation is constructed within the District to reflect possible increased control measures for the new source(s).432 Final Staff Report - Response to Comments

Appendix B B- 2 3/13/2014 C. Draft Rule

1. Section 1. states that the rule applies to commercial and industrial polyester resin operations, and “organic solvents (u se, storage, and waste)” associated with these operations. Please clarify whether the term “use” includes cleaning. We suggest adding the word “d isposal” after “waste.” Also, please clarify whether this rule pertains only to on-site disposal, or to both on-site disposal and off-site transfer and disposal of waste materials.

2. Section II.VV. – Please add a definition for “article.”

3. Section III.B. should refer to Table 2, rather than Table 1.

4. Section V.B.1.– Please cl arify whether the applicant must obtain or apply for an Authority to Construct (ATC) wit hin 90 days from rule adoption.

5. Section V. B. 1-3. – The section us es the terms “adoption” and “promulgation”
of rules. If these terms mean the same thing for purposes of this rule, we suggest selecting one of these terms to use consistently throughout the

section.

D. District’s Response to EPA Comments to Draft Rule

1. In regards to EPA comment listed above C.1, the Draft Rule was modified to the following wording:

The purpose of this rule is to reduce volatile organic compounds (VOC) emissions from polyester resin operations. The provisions of this rule apply to commercial polyester resin operations, industrial polyester resin operations, and organic solvents (use {including cleaning}, storage, waste, and disposal {off-site transfer}) associated with polyester resin operations.

2. In regards to EPA comment listed above C.2, the Draft Rule was modified to replace the word “article” with the word “product.”

3. In regards to EPA comment listed above C.3, the Draft Rule was modified to

correct “Table 1” with “Table 2.”

4. In regards to EPA comment listed above C.4, the Draft Rule was modified to require an applicant to apply for an Authority to Construct (ATC) within 180 days from rule adoption.

5. In regards to EPA comment listed above C.5, the Draft Rule was modified to use the word “adoption” throughout the document. The word “promulgation”
was eliminated from Draft Rule 432.