( Adopted : 07/06/79; Amended : 5/07/82; Amended : 01/06/84; Amended : 06/01/84; Amended : 01/09/87; Amended : 2/06/87; Amended : 04/03/87; Amended 05/05/89; Amended : 03/02/90; Amended : 04/06/90; Amended : 06/01/90; Amended : 11/02/90; Amended : 12/07/90; Amended : 08/02/91; Amended 03/06/92; Amended : 12/04/92; Amended : 12/10/93; Amended : 1/13/95; Amended : 12/13/96; Amended: 03/20/07; Amended: mm/dd/yy)

AVAQMD Rule 1124 1124-1 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 

## RULE 1124

Aerospace Assembly and Component Manufacturing Operations

(A) General

(1) Purpose

(a) To reduce Vv olatile Oo rganic Cc ompounds (VOC) emissions from aerospace assembly and component manufacturing operations.

(2) Applicability

(a) This rule applies to any operation associated w ith manufacturing and assembling products for Aa ircraft and Ss pace Vv ehicles. The affected industries include commercial and military Aa ircraft, satellite, space shuttle and rocket manufacturers and their subcontractors.

(b) This rule also applies to maskant applicators, Aa ircraft refinishers, Aa ircraft Ff astener Mm anufacturers, Aa ircraft operators, and Aa ircraft maintenance and service facilities.


### (B) Definitions

For the purpose of this rule, the following definit ions shall apply:

[Unless otherwise indicated, new definitions are de rived from “Control of Volatile Organic Compound Emissions from Coating Operations at Aeros pace Manufacturing and Rework Operations,” EPA-453/R-97-004, December 1997.]

(1) Ablative Coating – A coating that chars when ex posed to open flame or extreme temperatures, as would occur during the failure of an engine casing or during aerodynamic heating. The ablative char surface ser ves s an insulative barrier, protecting adjacent components from the heat or open flame.1124-2 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 21 ) Adhesion Promoter Coating – A Coatingprimer that is used to promote wetting and form a chemical bond with a subsequently applied Ss ealant or other elastomer. [Moved from primer category for consistency with the CTG d efinition.]

( 32 ) Adhesive - Any substance that is used to bond one surface to another surface by attachment.

( 43 ) Adhesive Bonding Primer - A Pp rimer applied in a thin film to Aa erospace Cc omponents for the purpose of corrosion inhibition andto increase d adhesive or adhesive film bond strength by attachment

. ( 54 ) Aerosol Coating Product - A pressurized coating p roduct containing pigments or resins that is dispensed by means of a propellant, and is packaged in a disposable can for hand-held application.

( 65 ) Aerospace Component - The raw material, partial o r completed fabricated part, assembly of parts, or completed unit of any Aa ircraft or Ss pace Vv ehicle and includes integral equipment such as models, mock-ups, protot ypes, molds, jigs, tooling, hardware jackets, and test coupons.

( 76 ) Aerospace Material – any coating, Pp rimer, Aa dhesive, Ss ealant, maskant, lubricant, Ss tripper or hand-wipe cleaning or clean-up solvent u sed during the manufacturing, assembly, refinishing, maintenance or service of an Aerospace Component. ]

( 87 ) Air Brush Operations – Application of Aerospace M aterial with equipment operating at air pressure between 25 psi and 116 psi and an air volume of 0.7 cfm and 1.75 respectively.

( 98 ) Aircraft - Any machine designed to travel through the air, without leaving the earth's atmosphere, whether heavier or lighter than air, in cluding airplanes, balloons, dirigibles, helicopters, and missiles.

( 109 ) Air Pollution Control Officer (APCO) – The person appointed to the position of Air Pollution Control Officer of the District pursuant to the provisions of California Health & Safety Code §40750 and his or her designee

. (1 10 ) Antichafe Coating - A coating applied to areas of moving Aa erospace Cc omponents which may rub during normal operation.

(1 21 ) Anti-Wicking Wire Coating - The outer coating of a wire which prevents fluid wicking into insulation of the wire.

(1 32 ) Barrier Coating - A coating applied in a thin fil m to fasteners to inhibit dissimilar metal corrosion and to prevent galling.AVAQMD Rule 1124 1124-3

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 (14) Bearing Coating – A coating applied to an anti friction bearing, a bearing housing, or the area adjacent to such bearing in order to facilitat e bearing function or to protect be material from excessive wear. A material shall not be classified as a Bearing Coating if it can also be classified as a dry lubricative mate rial or a solid-film lubricant.

(15) Bonding Maskant – A temporary coating used to protect selected areas of aerospace parts from strong acid or alkaline solutions during processing for bonding.

(16) Caulking and Smoothing Compound – Semi-solid m aterials which are applied by Hand Application Methods and are used to aerodynamically smooth exterior vehicle surfaces or fill cavities such as bolt hole accesses. A mat erial shall not be classified as a Caulking and Smoothing Compound if it can also be c lassified as a Sealant.

(17) Chemical Agent-Resistant Coating (CARC) – An e xterior Topcoat designed to withstand exposure to chemical warfare agents or th e decontaminants used on these agents.

(1 83 ) Chemical Milling

- The removal of metal by chemical action of acids o r alkalis.

(19) Chemical Milling Maskant - A coating applied d irectly to aluminum components to protect surface areas when Chemical Milling the com ponent with a Type I or Type II Etchant. Type I Chemical Milling Maskants are used with a Type I Etchant and Type II Chemical Milling Maskants are used with a Type II E tchant. This definition does not include Bonding Maskants, Critical Use and Line Sea lant Maskants, and Seal Coat Maskants. Additionally, maskants that must be used with a combination of Type I or II Etchants and any of the above types of maskants (I. e., Bonding, Critical Use and Line Sealer, and Seal Coat) are not included. Maskants that are defined as Specialty Coatings are not included in this definition. [Definition updated to CTG definition for clarity of categories.]

(20) Chemical Processing Maskant - A coating applie d directly to an Aerospace Component to protect surface areas when anodizing, aging, bon ding, plating, etching, and/or performing other chemical surface operations on the component.

( 1421 ) Clear Topcoat - A Tt opcoat that contains no visible pigments and is uni formly transparent when applied.

(22) Coating – A material that is applied to the su rface of an aerospace vehicle or component to form a decorative, protective, or functional sol id film, or the solid film itself.

( 2315 ) Coating Application Equipment - Equipment used fo r applying coating to a substrate. Coating Aa pplication Ee quipment includes coating distribution lines, coati ng hoses, pressure-pots, spray guns, and hand-application equ ipment, such as hand-rollers, brushes, daubers, spatulas, and trowels.1124-4 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 (24) Commercial Exterior Aerodynamic Structure Prim er – A Primer used on aerodynamic components and structures that protrude from the fu selage, such as wings and attached components, control surfaces, horizontal stabilizer s, vertical fins, wing-to-body fairings, antennae, and landing gear and doors, for the purpo se of extended corrosion protection and enhanced adhesion.

(25) Commercial Interior Adhesive – Materials used in the bonding of passenger cabin interior components. These components must meet th e FAA fireworthiness requirements.

(26) Compatible Substrate Primer – Either compatibl e epoxy primer or adhesive primer. Compatible epoxy primer is primer that is compatibl e with the filled elastomeric coating and is epoxy based. The compatible substrate prime r is an epoxypolyamide primer used to promote adhesion of elastomeric coatings such as impact-resistant coatings. Adhesive primer is a coating that (1) inhibits corr osion and serves as a primer applied to bare metal surfaces or prior to adhesive applicatio n, or (2) is applied to surfaces that can be expected to contain fuel. Fuel tank coatings ar e excluded from this category.

( 2716 ) Conformal Coating - A coating applied to electric al conductors and circuit boards to protect them against electrical discharge damage an d/or corrosion.

(28) Corrosion Prevention Compound System – A coati ng system that provides corrosion protection by displacing water and penetrating mati ng surfaces, forming a protective barrier between the metal surface and moisture. Co atings containing oils or waxes are excluded from this category.

(29) Critical Use and Line Sealer Maskant – A tempo rary coating, not covered under other maskant categories, used to protect selected areas of aerospace parts from strong acid or alkaline solutions such as those used in anodizing, plating, Chemical Milling and processing of magnesium, titanium, or high-strength steel, high-precision aluminum Chemical Milling of deep cuts, and aluminum Chemica l Milling of complex shapes. Materials used for repairs or to bridge gaps left b y scribing operations (i.e., line sealer) are also included in this category.

(30) Cryogenic Flexible Primer – A Primer designed to provide corrosion resistance, flexibility, and adhesion of subsequent coating sys tems when exposed to loads up to and surpassing the yield point of the substrate at cryo genic temperatures (-275°F and below).

(31) Cryoprotective Coating – A coating that insula tes cryogenic or subcooled surfaces to limit propellant boil-off, maintain structural inte grity of metallic structures during ascent or re-entry, and prevent ice formation.

(32) Cyanoacrylate Adhesive – A fast-setting, singl e component Adhesive that cures at room temperature. Also known as “super glue.”AVAQMD Rule 1124 1124-5

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 (33) District – The Antelope Valley Air Quality Man agement District, the geographical area of which is described in District Rule 103.

( 3417 ) Dry Lubricative Material s -Coatings consisting of lauric acid, cetyl alcohol , waxes or other non-cross linked or resin bound materials whi ch act as a dry lubricant or protective coat.

(18) District – The Antelope Valley Air Quality Man agement District, the geographical area of which is described in District Rule 103. [Alphabetized.]

( 3519 ) Electric

- oO r Radiation-Effect Coatings - Include electrically conductive coatings and radiation effect coatings and coating systems the u ses of which may include prevention of radar detection.

( 3620 ) Electronic Wire Coating - The outer electrical in sulation coating applied to tape insulation of a wire specifically formulated to smo oth and fill edges.

(37) Electrostatic Discharge and Electromagnetic In terference (EMI) Coating – A coating applied to Space-Vehicles, missiles, aircraft radom es, and helicopter blades to disperse static energy or reduce electromagnetic interferenc e.
(38) Elevated-Temperature Skydrol-resistant Commerc ial Primer – Primer applied primarily to commercial Aircraft (or commercial Aircraft adap ted for military use) that must withstand immersion in phosphate-ester (PE) hydraul ic fluid (Skydrol 500b or equivalent) at the elevated temperature of 150°F fo r 1,000 hours.

( 21) Epoxy Based Fuel-Tank Coating - Acoating that c ontains epoxy resin that is applied to a fuel tank of an aircraft to protect it from corro sion and/or bacterial growth. [Definition deleted. This category was combined with General F uel Tank Coating in previous amendment which has same VOC limit.]

(39) Epoxy Polyamide Topcoat – Coating used where h arder films are required or in some areas where engraving is accomplished in camouflage colors.

( 4022 ) Exempt Compounds - A compound identified as exempt in 40 CFR 51.100(s) (1)

. [Definition modified to be consistent with District Tert-Butyl Acetate (tBA) policy.]

( 4123 ) Facility - Any permit unit, group of permit units , non-permitted equipment or any combination thereof which emits or may emit an Air Pollutant; and belongs to a single major industrial group in the Standard Industrial C lassification manual; and is located on a single parcel of land or on contiguous propert y within the District; and which is owned or operated by the same person or by persons under common control.

(42) Fastener – Any of various devices, including b ut not limited to, pins, collars, blots, nuts, and rivets for holding together two (2) or more obj ects or parts.1124-6 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 4324 ) Fastener Manufacturer - A Ff acility that coats Aa ircraft fasteners, such as pins, collars, bolts, nuts, and rivets, with Ss olid- Ff ilm Ll ubricants for distribution to other facilities.

( 4425 ) Fire-Resistant (Interior) Coating - A cabin interior coating that meets for civilian aircraft the Federal Aviation Administration-requir ed Ohio State University Heat Release, Fire and Burn Tests; for military aircraft , Aircraft Structure Integrity Program in MIL-STD-1530A and MIL-A-87221 (Northrop's MS-445 -3.3.2.1 and MS-445- 3.3.2.2).

(a) For civilian Aircraft, Fire-Resistant Interior Coatings are used on passenger cabin interior parts that are subject to FAA firewo rthiness requirements.

(b) For military Aircraft, Fire-Resistant Interior Coatings are used on parts that are subject to the flammability requirements of MIL-STD -1630A and MIL-A87721.

(c) For space applications, Fire-Resistant Interior Coatings are used on parts that are subject to the flammability requirements of SE-R-00 06 and SSP 30233.

(45) Flexible Primer – A Primer that meets flexibil ity requirements such as those needed for adhesive bond primed fastener heads or on surfaces expected to contain fuel. The flexible coating is required because it provides a compatible, flexible substrate over bonded sheet rubber and rubber-type coatings as wel l as a flexible bridge between the fasteners, skin, and skin-to-skin joints on outer a ircraft skins. This flexible bridge allows more topcoat flexibility around fasteners an d decreases the chance of the topcoat cracking around the fasteners. The result is bette r corrosion resistance.

( 4626 ) Flight-Test Coating - A coating applied to an Aa ircraft prior to flight testing to protect the Aa ircraft from corrosion and to provide required mark ing during flight test evaluation.

( 4727 ) Fuel-Tank Adhesive - An Aa dhesive used to bond components exposed to fuel tha t must be compatible with Ff uel- Tt ank Cc oatings

. ( 4828 ) Fuel-Tank Coating, General

-– A coating applied to a fuel tank of an Aa ircraft to protect it from corrosion and/or bacterial growth.

( 4929 ) Fuel-Tank Coating, Rapid Cure – A fuel tank coati ng with shortened curing times and decreased sensitivity to low humidity during the cu ring process.

( 5030 ) Hand Application Method - The application of Aero space Materials by manually held, non-mechanically operated equipment. Such equipmen t includes paint brushes, hand rollers, caulking guns, trowels, spatulas, syringe daubers, rags, and sponges.AVAQMD Rule 1124 1124-7

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 5131 ) High-Temperature Coating - A coating that must wi thstand temperatures of more than 350oF.

( 5232 ) High-Volume, Low-Pressure (HVLP) Spray - An Aeros pace Materials application system which is operated with air pressure of betwe en 0.1 and 10 pounds per square inch gauge (psig).

( 5333 ) Impact-Resistant Coating - A flexible coating tha t protects Aa erospace Cc omponents, such as Aa ircraft landing gear, and landing gear compartments , and other surfaces subject to impact and abrasion from runway debris.

(54) Insulation Covering – Material that is applied to foam insulation to protect the insulation from mechanical or environmental damage.

(55) Intermediate Release Coating – A thin coating applied beneath Topcoats to assist in removing the Topcoat in depainting operations and g enerally to allow the use of less hazardous depainting methods.

(56) Lacquer Coating – A clear or pigmented coating formulated with a nitrocellulose or synthetic resin to dry by evaporation without a che mical reaction. Lacquers are resoluble in their original solvent.

( 5734 ) Line-Sealer Maskant - A maskant used to cover scrib e lines in maskant in order to protect against etchant in multi-step etching proce ssing. [See Critical Use and Line Sealer Maskant.]

( 5835 ) Low-Solids Adhesive Coating, Primer oO r Sealant - An Aa dhesive coating, Pp rimer or Ss ealant which has less than one pound of solids per gallon of material. Such solids are the non-volatiles remaining after a sample is heate d at 230oF (110 o C) for one hour.

( 5936 ) Low-Solids Corrosion Resistant Primer - A corrosi on resistant polyurethane compatible Pp rimer with enhanced adhesion and rain erosion resis tance which contains no more than 45 percent (45%) solids, by weight, as applied

. (37) Maskant For Chemical Milling - A coating appl ied directly to an aerospace component to protect surface areas when chemically milling th e component. [Formatted for consistency. See Chemical Milling Maskant.]

(38) Maskant For Chemical Processing - A coating ap plied directly to an aerospace component to protect surface areas when anodizing, aging, bonding, plating, etching, and/or performing other chemical surface operations on the component. [Formatted for consistency. See Chemical Processing Maskant.]

( 6039 ) Metallized Epoxy Coating - A coating that contain s relatively large quantities of flake pigmentation for appearance and/or added protection

.1124-8 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 6140 ) Mold Release Coating – A coating applied to the s urface of a mold to prevent the molded component from sticking to the mold as it is removed.

( 6241 ) Non-Structural Adhesive - An Aa dhesive that bonds non-load-carrying Aa ircraft components in non-critical applications and is not covered in any other specialty Aa dhesive categories.

( 6342 ) Optical Anti-Reflection Coating - A coating with a low reflectance in the infrared and visible wavelength range and is used for anti-refle ction on or near optical and laser hardware.

(64) Part Marking Coating – Coatings or inks used t o make identifying markings on materials, components, and/or assemblies. These ma rkings may be either permanent or temporary.

( 6543 ) Phosphate Ester Resistant Ink – A coating that is used for surface identification or marking which inhibits phosphate ester fluid corros ion.

( 6644 ) Photolithographic Maskant - A coating applied by Pp hotoresist Oo peration(s) directly to printed circuit boards, and ceramic and similar sub strates to protect surface areas from Cc hemical Mm illing or Cc hemical Pp rocessing.

( 6745 ) Photoresist Operation - A process for the applica tion or development of photoresist masking solution on a substrate, including preparat ion, soft bake, develop, hard bake, and stripping, and can be generally subdivided as f ollows:

(a) Negative Photoresist Operation is a process whe re the maskant hardens when exposed to light and the unhardened maskant is stri pped, exposing the substrate surface for Cc hemical Mm illing or Cc hemical Pp rocessing.

(b) Positive Photoresist Operation is a process whe re the maskant softens when exposed to light and the softened maskant is stripp ed, exposing the substrate surface for Cc hemical Mm illing or Cc hemical Pp rocessing.

( 4668 ) Pre -bonding Bonding Etchant – An acid or basic substance that is used t o increase the strength of an adhesive bond by chemically altering the substrate surface morphology to increase the bonding surface area of aerospace wire coatings to the underlying insulation layer. [Modified by combining Prebonding Etchant and Wire Prebonding Etchant definitions.]

( 6947 ) Pretreatment Primer Coating - A Coatingprimer which contains no more than 12 percent (12%) solids, by weight and at least 0.5 percent (0 .5%) acid by weight, to provide surface etching and is applied directly to metal su rfaces to provide corrosion resistance, adhesion, and ease of stripping. [Moved from primer category for consistency with th e CTG definition.]AVAQMD Rule 1124 1124-9

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 7048 ) Primer - A coating applied directly to an Aa erospace Cc omponent for purposes of corrosion prevention, protection from the environme nt, functional fluid resistance and/or adhesion of subsequent coatings, Aa dhesives, or Ss ealants.

( 7149 ) Primer Compatible wW ith Rain Erosion Resistant Coating - A Pp rimer to which rain erosion resistant Tt opcoat is applied.

( 7250 ) Rain Erosion-Resistant Coating - A coating that p rotects leading edges, flaps, stabilizers, and engine inlet lips against erosion caused by rain impact during flight.

( 7351 ) Repair Coating - A coating used to recoat portion s of a product which has sustained mechanical damage to the coating following normal p ainting operations.

(52) Repair Maskant - A maskant used to cover imper fections in the maskant coat. [Specific definition not used. Critical Use and Line Sealer Maskant definition includes a repair provision.]

( 7453 ) Rework - The inspection, repair, and reconditioni ng of Aa erospace Cc omponents subject to this rule.

(75) Rocket Motor Bonding Adhesive – Adhesive used in rocket motor bonding applications.

(76) Rocket Motor Nozzle Coating – A catalyzed epox y coating system used in elevated temperature applications on rocket motor nozzles.

( 7754 ) Rollable, Brushable or Extrudable Sealant – A sin gle or multi-component polymeric material used to seal many types of joints, gaps, r emovable panels, and windows where moderate movement is expected. Such material may b e applied by rolling brushing extruding or daubing.

(78) Rubber-based Adhesive – A quick setting contac t cement that provides a strong, yet flexible bond between two mating surfaces that may be of dissimilar materials.

(55) Rubber Solution Fuel-Tank Coating - A fuel-tan k coating which performs as a sealant and protects the tank from corrosion and/or bacteri al growth and is formulated with a butadiene acrylonitrile copolymer. [Definition no longer used. See Fuel Tank CoatingGeneral or –Rapid Cure.]

( 7956 ) Scale Inhibitor

Coating - A coating that is applied to the surface of a pa rt prior to thermal processing to inhibit the formation of tena cious scale.

(80) Screen Print Ink – An ink used in screen print ing processes during fabrication of decorative laminates and decals.1124-10 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 8157 ) Sealants - Viscous semisolid materials that fill voids in order to seal out water, fuel, and other liquids and solids, and in some cases, air mo vement.
(82) Seal Coat Maskant – An overcoat applied over a maskant to improve abrasion and chemical resistance during production operations.

(83) Silicone Insulation Material – An insulating m aterial applied to exterior metal surfaces for protection from high temperatures caused by atm ospheric friction or engine exhaust. These materials differ from Ablative Coatings in th at they are not “sacrificial.”

( 8458 ) Solid-Film Lubricant - A very thin coating consis ting of a binder system containing as its chief pigment material one or more of the follo wing: molybdenum disulfide, graphite, polytetrafluoroethylene (PTFE), or other solids that act as a dry lubricant between faying surfaces.

( 8559 ) South Coast Air Quality Management District (SCAQ MD) – The air quality district created pursuant to Division 26, Part 3, Chapter 5. 5 of the California Health & Safety Code (commencing with §40400).

( 8660 ) Space - Vehicle - A vehicle designed to travel beyond the e arth's atmosphere.

(87) Specialized Function Coating – A coating that fulfills extremely specific engineering requirements that are limited in application and ar e characterized by low volume usage. This category excludes coatings covered in other Sp ecialty Coating categories.

(88) Specialty Coating – A coating that, even thoug h it meets the definition of a Primer, Topcoat, or self-priming Topcoat, has additional pe rformance criteria beyond those of Primers, Topcoats, and self-priming Topcoats for sp ecific applications. These performance criteria may include, but are not limit ed to, temperature or fire resistance, substrate compatibility, antireflection, temporary protection or marking, sealing, adhesively joining substrates, or enhanced corrosio n protection.

( 8961 ) Stencil Coating – An ink or coating that is rolle d, sprayed with an airbrush or touch-up gun, or brushed while using a template to add ident ifying letters and or numbers to Aerospace Components.

( 9062 ) Stripper - A volatile liquid applied to remove cu red Aerospace Material or their residues.

( 9163 ) Structural Adhesive - Autoclavable - An Aa dhesive used to bond load-carrying Aa ircraft components and is cured by heat and pressur e in an autoclave.

( 9264 ) Structural Adhesive, High Temperature – Autoclava ble – An Aa dhesive used to bond load-carrying Aa ircraft components which is cured by heat and press ure in an autoclave, and can withstand service temperatures a bove 450 ° F (232 ° C).AVAQMD Rule 1124 1124-11

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 9365 ) Structural Adhesive - Non-Autoclavable - An Aa dhesive cured under ambient conditions and is used to bond load-carrying Aa ircraft components or other critical functions, such as nonstructural bonding in the pro ximity of engines.

(66) Temporary Marking Coating - An ink or a coati ng used to make identifying markings, and is removed prior to delivery of the aerospace c omponent and/or assembly. [Definition removed. See Part Marking Coating.]

( 9467 ) Temporary Protective Coating - A coating applied to an Aa erospace Cc omponent to protect it from mechanical and environmental damage during manufacturing.

(95) Thermal Control Coating – A coating formulated with specific thermal conductive or radiative properties to permit temperature control of the substrate.

( 9668 ) Topcoat - A coating applied over a Pp rimer or other coating on an aerospace vehicle or component for purposes such as appearance, identification, camouflage, or protection. Topcoats that are defined as specialty coatings are not included in this definition. [Definition modified to CTG definition for clarific ation pursuant to USEPA comment, and so definition will also include clear coating C TG category.]
(69) Touch-Up Coating - A coating used to cover min or coating imperfections appearing after the main coating operation. [Definition not used. See Touch-Up Operation.]

( 9770 ) Touch-Up Operation – The application of Aerospace Materials by brush, air brush, detail HVLP spray equipment outside of a permitted paint enclosure to repair minor surface damage and imperfections after the main coa ting process. [See exemption (G)(6) for affected area exempted.]

( 9871 ) Transfer Efficiency - The ratio of the weight or volume of coating solids adhering to an object to the total weight or volume, respectively, of coating solids used in the application process, expressed as a percentage.

( 9972 ) Type I Etchant – A Cc hemical Mm illing etchant that contains varying amounts of dissolved sulfur and does not contain amines.

( 10073 ) Type II Etchant – A Cc hemical Mm illing etchant that is a strong sodium hydroxide solution containing amines.

( 10174 ) Unicoat - A coating which is applied directly to an Aa erospace Cc omponent for purposes of corrosion protection, environmental pro tection, and functional fluid resistance that is not subsequently Tt opcoated.

( 10275 ) United States Environmental Protection Agency (US EPA) – The United States Environmental Protection Agency, the Administrator of the USEPA and his or her authorized representative.1124-12 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 ( 10376 ) Volatile Organic Compound (VOC) - Any volatile co mpound containing the element carbon, excluding methane, carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, ammonium carbonate , and Ee xempt Cc ompounds as listed in 40 CFR 51.100(s) (1)

. [Definition modified for consistency with District TertButyl Acetate (tBA) policy.]

(104) Wet Fastener Installation Coating – A Primer or Sealant applied by dipping, brushing, or daubing to fasteners that are installed before t he coating is cured.

( 10577 ) Wing Coating - A corrosion-resistant coating that is resilient enough to withstand the flexing of the wings.

(78) Wire Ink - The surface identification stripe a nd mark on aerospace wire or cable which serves as an electrical insulator in the presence o f high humidity. [Definition not used. See subcategories of Wire Coating Category.]

(79) Wire Prebonding Etchant - A non-additive surfa ce treatment process to provide bondability of aerospace wire coatings to the under lying insulation layer [See “Prebonding Etchant” definition.]


### (C) Requirements

(1) VOC Content of Coatings

(a) A person shall not apply to Aa erospace Cc omponents any Aerospace Materials, including any VOC-containing materials added to the original Aerospace Materials supplied by the manufacturer, which conta in VOC in excess of the limits specified below:

VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds Aerospace Materials: VOC Limit

PRIMERS -- General 350 Adhesion Promoter 850 Adhesive Bonding Primers -- Commercial Aircraft 250 Military Aircraft 805 Low Solids Corrosion Resistant Primer 350 Pretreatment Primer 780 Primer Compatible with Rain Erosion-Resistant Coati ng 850

COATINGS -- Antichafe Coating 420 Conformal Coating 750AVAQMD Rule 1124 1124-13

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds Electric- or Radiation-Effect Coating 800 Fire-Resistant Coating -- Civilian 650 Military 800 Flight-Test Coating -- Used on Missiles or Single Use Target Craft 420 All Other 840 Fuel-Tank Coating -- General 420 Rapid Cure 720 High-Temperature Coating 850 Impact-Resistant Coating 420 Metallized Epoxy Coating 700 Mold Release Coatings 780 Optical Anti-Reflection Coating 700 Rain Erosion-Resistant Coating 800 Scale Inhibitor 880 Space-Vehicle Coatings -- Electrostatic Discharge Protection Coating 800 Other Space-Vehicle Coating 1000 Temporary Protective Coating 250 Topcoat 420 Clear Topcoat 520 Unicoat 420 Wing Coating 750 Wire Coatings -- Electronic Wire Coating 420 Anti-Wicking 420 Pre-Bonding Etchant 420 Phosphate Ester Resistant Ink 925

ADHESIVES -- Fuel-Tank Adhesive 620 Non-Structural 250 Space Vehicle Adhesive 800 Structural Adhesive -- Autoclavable 50 High Temperature - Autoclavable 650 Non-Autoclavable 850

SEALANTS Extrudable, Rollable or Brushable 280 Other 600

MASKANTS -- For Chemical Milling For use with Type I Etchant 2501124-14 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds For use with Type II Etchant 160 For Chemical Processing 250* Photolithographic Maskant 850 Touch-up, Line-Sealer Maskant 750 * Less water exempt compounds and perchloroethylen e (PERC).

LUBRICANTS

-

- Fastener Installation

-

- Solid-Film Lubricant 8 8 0 Dry Lubricative Material 6 7 5 Fastener Lubricative Coating

-

- Solid-Film Lubricant 2 5 0 Dry Lubricative Material 1 2 0 Barrier Coating 4 2 0 Non-Fastener Lubricative Coatings

-

- Solid-Film Lubricant 8 8 0 Dry Lubricative Materials 6 7 5

SPECIALTY COATING VOC LIMITS Grams Per Liter of Coating Less Water and Less Exem pt Compounds AEROSPACE MATERIALS [Explanatory Comments, not a part of rule] VOC Limit

PRIMERS -- General [SIP category] 350 Adhesion Promoter [ Moved to coating category for consistency with CTG definition] 850 Adhesive Bonding Primers [See AVAQMD 3/20/07 Staff Report for discussion of this category] --AVAQMD Rule 1124 1124-15

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds
Commercial Aircraft 250 Military Aircraft 805 Commercial Exterior Aerodynamic Structure Primer [New CTG category. Not a subcategory of pretreatment primer] 650 Compatible Substrate Primer [New CTG category. Not a low solids corrosion resistant primer] 780 Cryogenic Flexible Primer [New CTG category. Not a subcategory of pretreatment primer] 645 Elevated Temperature Skydrol-Resistant Commercial P rimer [New CTG category. Not a subcategory of pretreatment primer ] 740 Flexible Primer [New CTG category. Not a subcategory of pretreatme nt primer] 640 Low Solids Corrosion Resistant Primer [Added in 3/20/07 amendment. CTG category] 350

Pretreatment Primer [Moved to coating category for consistency with CTG definition] 780 Primer Compatible with Rain Erosion-Resistant Coati ng [SIP category] 850

COATINGS -- Ablative Coating [New CTG category] 600
Adhesion Promoter Coating [Moved from primer category for consistency with CTG definition] 850 Antichafe Coating [SIP category] 420
Bearing Coating [New CTG category, not a subcategory of Fastener Lubricative or non-fastener lubricative coating] 620
Chemical Agent-Resistant Coating [New specialized CTG category, resistant to chemical warfare agents, not a subcate gory of topcoat] 550 Conformal Coating [SIP Category] 750
Cryoprotective Coating [New CTG category, not specific to space vehicles. Prevents ice formation] 600 Electric- or Radiation-Effect Coating [SIP category] 800
Electrostatic Discharge and Electromagnetic Interfe rence (EMI) Coating [New CTG category, not specific to space vehicles] 800 Fire-Resistant (Interior) Coating -- Civilian [SIP category] 650 Military [SIP category] 800 Space [Sub-category split out to conform to CTG definitio n] 800 Flight-Test Coating -- Used on Missiles or Single Use Target AircCraft [SIP category] 420
All Other [SIP category] 840 Fuel-Tank Coating [See AVAQMD 3/20/07 Staff Report for discussion of --1124-16 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds this category]

General 420 Rapid Cure 720 High-Temperature Coating [SIP category] 850 Impact-Resistant Coating [SIP category] 420 Intermediate Release Coating [New CTG category] 750 Lacquer Coating [New CTG category. Lacquer is not always a topcoat] 830 Metallized Epoxy Coating [SIP category] 700 Mold Release Coatings [Added in 3/20/07 amendment. CTG category] 780 Optical Anti-Reflection Coating [SIP category] 700
Part Marking Coating [New CTG category. Part marking can be permanent or temp. Remove exemption (G)(9) and (G) (11)] 850
Pretreatment Coating [Moved from primer category for consistency with CTG definition] 780 Rain Erosion-Resistant Coating [SIP category] 800
Rocket Motor Nozzle Coating [New CTG category. Not a subcategory as it is very specific to withstand heat, pressure and magnetic forces] 660 Scale Inhibitor Coating [SIP category] 880

Space-Vehicle Coatings, Other: does not include Ele ctric Discharge and EMI Protection Coating or Fire Resistant (Interior) Coating [CTG does not distinguish between space and other. SIP catego ry] 1000 Electrostatic Discharge and Electromagnetic Int erference (EMI) Protection Coating [This category is not specific to space vehicles. Alphabetized into general table] 800
Fire-Resistant (Interior) Coating [This category is not specific to space vehicles. Alphabetized into general table ] 800 Other Space-Vehicle Coating [See Space Vehicle Coatings, Other, above] 1000 Specialized Function Coating [New CTG category] 890 Temporary Protective Coating [SIP category] 250 Thermal Control Coating [New CTG category] 800 Topcoat [Definition updated to include clear coating catego ry from CTG] -- Clear [SIP category] 520 Epoxy Polyamide [New CTG category] 660
Other [Reorganized for consistency with rest of table for mat] 420 Unicoat Coating [SIP category] 420 Wet Fastener Installation Coating [New CTG category] 675 Wing Coating [SIP category] 750 Wire Coatings [SIP categories]AVAQMD Rule 1124 1124-17

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds Electronic Wire Coating 420 Anti-Wicking 420 Pre-Bonding Etchant 420 Phosphate Ester Resistant Ink 925

ADHESIVES -- Commercial Interior Adhesive [New CTG category, not covered by nonstructural category] 760 Cyanoacrylate Adhesive [New CTG category] 1020
Fuel-Tank Adhesive [SIP category] 620
Non-Structural Adhesive [SIP category] 250 Rocket Motor Bonding Adhesive [New CTG category, not covered by space vehicle adhesive] 890
Rubber-based Adhesive [New CTG category] 850 Space Vehicle Adhesive [SIP category] 800 Structural Adhesive [See AVAQMD 3/20/07 Staff Report for discussion of this category] -- Autoclavable 50 High Temperature - Autoclavable 650
Non-Autoclavable 850

SEALANTS -- Extrudable, Rollable, or Brushable or Extrudable Se alant [Added in 3/20/07 amendment. CTG category. Restructured to m atch order in definition]] 280

Fastener Sealant [Inadvertently removed by SCAQMD. This limit is in SIP version of Rule] 675
Other [SIP category] 600

MASKANTS -- Bonding Maskant [New CTG category. Definition of Chemical Milling Maskants says it is not bonding maskant] 1230

Critical Use and Line Sealer Maskant [Renamed Touch-up, Line-sealer Maskant category for consistency with CTG] 750 For Chemical Milling Maskant [Added in 3/20/07 amendment. CTG category] For use with Type I Etchant 250 For use with Type II Etchant 160
For Chemical Processing *Less water, exempt co mpounds and perchloroethylene (PERC) 250*1124-18 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 VOC LIMIT Grams Per Liter of Coating Less Water and Less Exem pt Compounds Photolithographic Maskant [SIP category] 850 Touch-up, Line-Sealer Maskant 750

* Less water exempt compounds and perchloroethylen e (PERC).

Seal Coat Maskant [New CTG category. Definition of Chemical Milling Maskants says it is not bonding maskant] 1230

LUBRICANTS -- Fastener Installation Lubricant (applied at time of aircraft/component assembly) [Parenthetical is for clarification. SIP categorie s] -- Solid-Film Lubricant 880 Dry Lubricative Material 675
Fastener Lubricative Coating (applied at time of fa stener manufacture) [Parenthetical is for clarification. SIP categorie s] -- Solid-Film Lubricant 250 Dry Lubricative Material 120 Barrier Coating 420
Non-Fastener Lubricative Coatings (applied at time of non-fastener manufacture) [Parenthetical is for clarification. SIP categorie s] -- Solid-Film Lubricant 880 Dry Lubricative Materials 675

OTHER -- Caulking and Smoothing Compound [New CTG category] 850 Corrosion Prevention Compound System [New CTG category] 710 Insulation Covering [New CTG category] 740 Screen Print Ink [New CTG category not covered specifically by graph ic arts rules] 840 Silicone Insulation Material [New CTG category for aerospace industry specific material] 850

[Added “Other” category to include materials that d o not conform to existing categories.

New categories for consistency with CTG: Commercial Exterior Aerodynamic Structure Primer; Compatible Substrate Primer; Cryogenic Flex ible Primer; Elevated Temperature Skydrol-Resistant Commercial Primer; Fl exible Primer; Ablative Coating; Adhesion Promoter; Bearing Coating; Chemic al Agent-Resistant Coating (CARC); Cryoprotective Coating; Electrostatic Disch arge and ElectromagneticAVAQMD Rule 1124 1124-19

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 Interference (EMI) Coating; Fire-Resistant Coating (Space); Intermediate Release

Coating; Lacquer; Part Marking Coating; Pretreatmen t Coating; Rocket Motor Nozzle Coating; Specialized Function Coating; Thermal Cont rol Coating; Topcoat (Epoxy Polyamide); Wet Fastener Installation Coating; Comm ercial Interior Adhesive; Cyanoacrylate Adhesive; Rocket Motor Bonding Adhesi ve; Rubber-based Adhesive; Fastener Sealant; Bonding Maskant; Critical Use and Line Sealer Maskant; Seal Coat Maskant; Caulking and Smoothing Compound; Corrosion Prevention System Compound; Insulation Covering; Screen Print Ink; Si licone Insulation Material.

Changes and clarifications derived from CTG Control of Volatile Organic Compound Emissions from Coating Operations at Aerospace Manu facturing and Rework Operations, EPA-453/R-97-004, December 1997 unless otherwise noted.]

(b) Documents shall be provided to the the APCO demonstrating that the Unicoat is being used in lieu of the application of a Pp rimer and Tt opcoat, and the applicant must receive written approval for the use of the Unicoat specifying the conditions of application from the APCO.

(c) For Ll ow- Ss olids Aa dhesives, Cc oatings, Pp rimers or Ss ealants, the appropriate limits in subparagraph ( Cc )(1)(a) shall be expressed in grams of VOC per lite r of material.

(2) Solvent Use, Clean Up, and Stripping

(a) A person shall not use VOC-containing materials for cleaning or clean up, excluding coating stripping and equipment cleaning unless:

(i) The VOC composite partial pressure is 45 mm Hg or less at a temperature of 20 o C (68 o F); or (ii) The material contains 200 grams or less of VOC per liter of material.

(b) A person shall not use Ss tripper on Aa erospace Cc omponents unless:

(i) It contains less than 300 grams of VOC per lite r of material; or (ii) The VOC composite partial pressure is 9.5 mm H g (0.18 psia) or less at
20 o C (68 o F).

(c) A person shall not atomize any solvent into ope n air.

(3) Equipment Cleaning Operations

Cleaning of Cc oating Aa pplication Ee quipment shall comply with provisions of Rule 1171 – Solvent Cleaning Operations

. (4) Storage of VOC-Containing Materials1124-20 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 All VOC containing material, used or unused, includ ing but not limited to surface coatings, thinners, cleanup solvents, or surface pr eparation materials, and all solvent laden cloth and paper, shall be stored in non-absor bent, non-leaking containers which shall be kept closed at all times except during ext raction or introduction of material for mixing, use or storage.

(5) Transfer Efficiency

No person or Ff

acility shall apply Aerospace Material s unless it is applied with properly operating equipment or controlled, according to ope rating procedure specified by the equipment manufacturer or the APCO, and by the use of one of the following methods:

(a) Ee lectrostatic application; or
(b) Ff low coater; or
(c) Rr oll coater; or
(d) Dd ip coater; or
(e) Hh igh- Vv olume, Ll ow- Pp ressure (HVLP) Ss pray; or
(f) Hh and Aa pplication Mm ethods; or

(g) Ss uch other alternative application methods as are de monstrated to the APCO, using District-approved procedures, to be capable o f achieving at least equivalent Tt ransfer Ee fficiency to method (C)(5)(e) and for which written approval of the APCO has been obtained; or

(h) Approved air pollution control equipment under paragraph (C)(6).

(6) Control Equipment

Owners and/or operators may comply with provisions of paragraphs (C)(1), (C)(2), and (C)(5) by using approved air pollution control equi pment provided that the VOC emissions from such operations and/or materials are reduced in accordance with provisions of (a) and (b) below

. (a) The control device shall reduce emissions from an emission collection system by at least 95 percent (95%), by weight, or by redu cing the output of the air pollution control device to less than 50 PPM ppm calculated for carbon with no dilution.

(b) The owner/operator demonstrates that the system collects at least 90 percent (90%), by weight, of the emissions generated by the sources of emissions.AVAQMD Rule 1124 1124-21

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 (7) Prohibition of Solicitation of Violations

(a) A person shall not solicit or require any other person to use, in the District, any Aerospace Material or combination of Aerospace Mate rials to be applied to any Aa ircraft component subject to the provisions of this rule that does not meet the limits and requirements of this rule, or of an Alte rnative Emission Control Plan (AECP) approved pursuant to the provisions of (C)(8 ).

(b) The requirements of this paragraph shall apply to all written or oral agreements executed or entered into after April 3, 1987.

(8) Alternative Emission Control Plans

(a) An owner/operator may comply with the provision s of paragraph (C)(1) by means of an Alternative Emission Control Plan pursu ant to Rule 108 – Alternative Emission Control Plans

. 

### (D) Recordkeeping and Reporting Requirements

(1) Recordkeeping

(a) Records shall be maintained pursuant to the req uirements of Rule 109 – Recordkeeping for Volatile Organic Compound Emissio ns

. (2) Reporting

(a) Persons who perform qualification acceptance te sting on Aerospace Materials with a future compliance date for use in the Distri ct shall, on January 1 and July 1 of each year, submit a status report describing t he progress toward the development of Aerospace Materials which satisfy fu ture compliance dates. These reports shall contain, at a minimum:

(i) Manufacturer, product number, VOC content, and applicable coating category for each of the test candidates; (ii) Test expenditures for the period; (iii) Progress on candidates tested during this per iod ;. (iv) Approvals received for coatings which comply w ith future compliance dates ; and. (v) Volume of coatings used in each coating categor y for which there is a future compliance date.

(b) Facilities testing coatings in the same coating category may submit joint status reports. Once compliance with future compliance da tes is achieved and a status report is submitted documenting such, no further st atus reports need be submitted.1124-22 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 

### (E) Compliance Procedures and Test Methods

(1) Calculations

(a) For the purpose of determining compliance with VOC content limits specified in section (C), grams of VOC per liter of Aerospace Ma terial shall be determined by using the following formulas as applicable:

(i) For Aerospace Mm aterials not containing reactive diluents, grams of VOC per liter of coating, less water and less Ee xempt Cc ompounds shall be determined as follows:

   ⁄ = − −
  −  −  Grams of VOC per Liter of W s – W w – W es Coating, Less Water and Less = Exempt Compounds V m – V w - V es

Where: G_(VOC⁄LoC) = Grams of VOC per Liter of

Coating, Less Water and Less Exempt Compounds W s = Weight of volatile compounds in

grams. W w = Weight of water in grams. W es = Weight of Ee xempt Cc ompounds in

grams. V m = Volume of material in liters. V w = Volume of water in liters. V es = Volume of Ee xempt Cc ompounds

in liters.

(ii) For Aerospace s Materials that contain reactive diluents, grams of VOC per liter of coating, less water and less Ee xempt Cc ompounds shall be determined as follows:

Grams of VOC per Liter of W s – W w – W es Coating, Less Water and Less = Exempt Compounds V m – V w - V es

Where: W s = Weight of volatile compounds evolved

during curing and analysis, in grams.AVAQMD Rule 1124 1124-23

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 W w = Weight of water evolved during curing and analysis, in grams. W es = Weight of Ee xempt Cc ompounds evolved

during curing and analysis, in grams. V m = Volume of material prior to reaction, in

liters. V w = Volume of water evolved during curing

and analysis, in liters. V es = Volume of Ee xempt Cc ompounds evolved

during curing and analysis, in liters.

(b) Total grams of VOC per liter of Aerospace Mater ial shall be determined using the following formula:

Grams of VOC per Liter of W s – W w – W es Coating = V m

Where: W s = Weight of volatile compounds in grams. W w = Weight of water in grams. W es = Weight of Ee xempt Cc ompounds in grams. V m = Volume of material in liters.

(c) The VOC composite partial pressure shall be det ermined as follows:

  =  

  ×  

 +  + ∑ 

  ! "# !

"#

Wi

x VP i
n MW i PPc = Σ

i=1 W w W e n W i

+ + Σ MW w MW e i=1 MW i

Where: W i = Weight of the “i”th VOC compound, in grams. W w = Weight of water, in grams. W e = Weight of Ee xempt Cc ompound, in grams MW i = Molecular weight of the “i”th VOC compound, in1124-24 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 grams per gram-mole. MW e = Molecular weight of Ee xempt Cc ompound in grams per

gram-mole. PP c = VOC composite partial pressure at 20 ° C, in mm Hg. VP i = Vapor pressure of the “i”th VOC compound at 20 ° C, in

mm Hg.

(2) VOC Content of Aerospace Materials

(a) To determine the physical properties of an Aero space Material in order to perform the calculations in subsection (E)(1) , the following reference methods shall be used:

(i) EPA Reference Method 24 (Determination of Volat ile Matter Content, Water Content, Density Volume Solids, and Weight So lids of Surface Coatings, Code of Federal Regulations Title 40, Par t 60, Appendix A). a. Analysis done according to EPA Method 24 shall u tilize ASTM Method D-2369-95 (Standard Test Method for Volatile Content of Coatings) , referenced in EPA Method 24. [Complete title added to meet the enforceability requirement of CAA 110(a)(2)(A) per EPA’s “Little Blue Book” pursuant to USEPA comment 4/23/13.] b. The exempt solvent content shall be determined u sing SCAQMD Test Methods 302 -91 (Distillation of Solvents from Paints, Coatings and Inks, February 1993) and 303 -91 (Determination of Exempt Compounds, August 1996) (SCAQMD "Laboratory Methods of Analysis for Enforcement Samples" manual ) or; [Complete title added to meet the enforceability re quirement of CAA 110(a)(2)(A) per EPA’s “Little Blue Book” pursu ant to USEPA comment 4/23/13.] (ii) SCAQMD Test Methods 302, 303, and 304 (SCAQMD "Laboratory Methods of Analysis for Enforcement Samples" manual ).

(b) The following classes of compounds listed below will be analyzed as Ee xempt Cc ompounds for compliance with subdivision (C), only at such time as manufacturers specify which individual compounds ar e used in the coating formulations and identify the test methods, which, prior to such analysis, have been approved by the USEPA and the SCAQMD, that can be used to quantify the amounts of each Ee xempt Cc ompound.

(i) Cyclic, branched, or linear, completely fluorin ated alkanes; cyclic, branched, or linear, completely fluorinated ethers with no unsaturations; cyclic, branched, or linear, completely fluorinated tertiary amines withAVAQMD Rule 1124 1124-25

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 no unsaturations; and sulfur-containing perfluoroca rbons with no unsaturations and with sulfur bonds only to carbon and fluorine.

(3) Test Methods

(a) Efficiency of the control device shall be deter mined according to EPA Method 25, 25A, or SCAQMD Test Method 25.1 (Total Gaseous Non-Methane Emissions, February 1991) or SCAQMD Test Method 25.3 (Clean-Fueled Combustion Sources, March 2000) . Emissions determined to exceed any limits established by this rule through the use of either of the above-referenced test methods shall constitute a violation of this rule. [Complete title added to meet the enforceability requirement of CAA 110(a)(2)(A) per EPA’s “Little Blue Book” pursuant to USEPA comment 4/23/13.]

(b) The capture efficiency of the emissions collect ion system shall be determined by the USEPA method 204A-F and the most recent version of USEPA’s Guidelines for Determining Capture Efficiency or any other method approved by the USEPA, the California Air Resources Board, and the SCAQMD.

(c) The Tt ransfer Ee fficiency of alternative coating application method s shall be determined in accordance with the SCAQMD method "Sp ray Equipment Transfer Efficiency Test Procedure for Equipment Us er, May 24, 1989".

(d) The identity and quantity of components in solv ents shall be determined in accordance with SCAQMD test method 308 -91 (Quantitation of Compounds by Gas Chromatography , February 1993 ) contained in the SCAQMD "Laboratory Methods of Analysis for Enforcement Samples" manual . The VOC composite partial pressure is calculated using the equation i n paragraph (b)(63)(E)(1)(c)

. [Complete title added to meet the enforceability re quirement of CAA 110(a)(2)(A) per EPA’s “Little Blue Book” pursuant to USEPA comment 4/23/13. Cross reference corrected pursuant to USE PA comment 4/23/13.]

(e) Multiple Test Methods

(i) When more than one test method or set of test m ethods are 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 me thods shall constitute a violation of the rule.

(f) Any applicable alternative test method may be u sed so long as such method has been approved by USEPA, CARB and the APCO.1124-26 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 

### (F) Administrative Requirements

(1) Rule 442 Applicability

(a) Any Aerospace Material or Ff acility which is exempt from all or a portion of this rule, shall comply with the provisions of Rule 442 – Usage of Solvents

. [Title added pursuant to USEPA comment 4/23/13.]


### (G) Exemptions

(1) The provisions of paragraph (C)(1) of this rule shall not apply to Aerospace Materials with separate formulations that are used in volumes of less than 20 gallons per year provided that the total of all such formulations ap plied annually at a Ff acility is less than 200 gallons.

(2) The provisions of subdivision (C) of this rule shall not apply to a Ff acility which uses a total of less than three gallons of VOC-containing Aerospace Materials on each and every day of operation.

(3) The provisions of paragraphs (C)(1) and (C)(5) of this rule shall not apply to incidental corrosion maintenance Rr epair Cc oating operations at military Ff acilities, provided that the coating use at any maintenance repair location within the Ff acility does not exceed 1.5 gallons per day, and the total coating usage fo r such operations at the Ff acility does not exceed five (5) gallons per day.

(4) The provisions of subparagraph (C)(2)(a) shall not apply to Ss pace Vv ehicle manufacturing.

(5) The provisions of paragraph (C)(1) shall not ap ply to clear or translucent coatings applied on clear or transparent substrates.

(6) The provisions of paragraph (C)(5) shall not ap ply to Touch-up Operations and Ss tencil Cc oatings provided that the Touch-up Operations and Ss tencil Cc oatings do not exceed 25 sq. ft. per Aa ircraft. [This exemption further defines Touch-up Operations by defining the affected area.

(7) The provisions of paragraph (C)(1) shall not ap ply to the recoating of assembled Aa ircraft at Rr ework facilities if original coating formulations a re used.

(8) The provisions of paragraph (C)(1) shall not ap ply to Aa dhesives with separate formulations that are used in volumes of less than ten gallons per year.AVAQMD Rule 1124 1124-27

Aerospace Assembly and Component Manufacturing Operations D2: 06/26/13 (9) The provisions of paragraph (C)(5) shall not be applied to the application of materials marking coatings. [Exemption removed for consistency with CTG categor y of Part Marking Coating, pursuant to USEPA comment 4/23/13. ]

( 109 ) The provisions of subdivision (C) shall not apply to laboratories which apply Aerospace Materials to test specimens for purposes of researc h, development, quality control, and testing for production-related operations.

(11) The provisions of subdivision (C) shall not ap ply to the application of temporary marking coatings. [Exemption removed for consistency with CTG categor y of Part Marking Coating.]

( 1210 ) The provisions of paragraph (C)(2) of this rule d o not apply to the surface cleaning of solar cells, fluid systems, avionic equipment, and laser optics.

( 1311 ) The provisions of subdivision (D)(1) and (C)(5) s hall not be applied to the application of materials that contain less than 20 g/L of VOC p er liter of material.

( 1412 ) The provisions of paragraph (C)(5) shall not appl y to the use of materials dispensed from airbrush operations provided that the paint re servoir on the air brush is 8 oz or less and that the total amount of coating used for Aa ir Bb rush Oo perations at the Facility does not exceed five (5) gallons per year.

( 1513 ) The provisions of this rule shall not apply to Aa erosol Cc oating Pp roducts.

See SIP Table at http://www.avaqmd.ca.gov/Modules/S howDocument.aspx?documentid=921

[SIP: Submitted as amended 3/20/07 on _____; Subm itted as amended 12/13/96 on 8/1/97 and approved for SCAQMD area only 8/17/98, 63 FR 43884; Approved 5/6/96, 61 FR 20136, 40 CFR 52.220(c)(215)(I)(A)(5); Approved 1/24/85, 50 FR 33 38, 40 CFR 52.220(c)(154)(vii)(A); Approved 9/28/81, 46 FR 47451, 40 CFR 52.220(c)(58)(ii)(B)]