( 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: 08/20/13)

AVAQMD Rule 1124 1124-1 Aerospace Assembly and Component Manufacturing Operations 

## RULE 1124

Aerospace Assembly and Component Manufacturing Operations

(A) General

(1) Purpose

(a) To reduce Volatile Organic Compounds (VOC) emis sions from aerospace assembly and component manufacturing operations.

(2) Applicability

(a) This rule applies to any operation associated w ith manufacturing and assembling products for Aircraft and Space Vehicles . The affected industries include commercial and military Aircraft , satellite, space shuttle and rocket manufacturers and their subcontractors.

(b) This rule also applies to maskant applicators, Aircraft refinishers, Aircraft Fastener Manufacturers, Aircraft operators, and Air craft maintenance and service facilities.


### (B) Definitions

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

(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 as an insulative barrier, protecting adjacent components from the heat or ope n flame.

(2) Adhesion Promoter Coating – A Coating that is u sed to promote wetting and forms a chemical bond with a subsequently applied S ealant or other elastomer.

(3) Adhesive – Any substance that is used to bond o ne surface to another surface by attachment.

(4) Adhesive Bonding Primer – A Primer applied in a thin film to Aerospace Components for the purpose of corrosion inhibition and increased adhesive bond strength by attachment.1124-2 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (5) Aerosol Coating Product – A pressurized Coating product containing pigments or resins that is dispensed by means of a propellant, and is packaged in a disposable can for hand-held application.

(6) Aerospace Component – The raw material, partial or completed fabricated part, assembly of parts, or completed unit of any Aircraf t or Space Vehicle and includes integral equipment such as models, mock-up s, prototypes, molds, jigs, tooling, hardware jackets, and test coupons.

(7) Aerospace Material – Any Coating, Primer, Adhes ive, Sealant, maskant, lubricant, Stripper or hand-wipe cleaning or clean- up solvent used during the manufacturing, assembly, refinishing, maintenance o r service of an Aerospace Component.

(8) Air Brush Operations – Application of Aerospace Material with equipment operating at air pressure between 25 psi and 116 ps i and an air volume of 0.7 cfm and 1.75, respectively.

(9) Aircraft – Any machine designed to travel throu gh the air, without leaving the earth's atmosphere, whether heavier or lighter than air, including airplanes, balloons, dirigibles, helicopters, and missiles.

(10) Air Pollution Control Officer (APCO) – The per son appointed to the position of Air Pollution Control Officer of the District pursu ant to the provisions of California Health & Safety Code §40750 and his or h er designee

. (11) Antichafe Coating – A Coating applied to areas of moving Aerospace Components which may rub during normal operation.

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

(13) Barrier Coating – A Coating applied in a thin film to Fasteners to inhibit dissimilar metal corrosion and to prevent galling.

(14) Bearing Coating – A Coating applied to an anti friction bearing, a bearing housing, or the area adjacent to such bearing in order to fa cilitate bearing function or to protect be material from excessive wear. A materia l shall not be classified as a Bearing Coating if it can also be classified as a D ry Lubricative Material or a Solid-Film Lubricant.

(15) Bonding Maskant – A temporary Coating used to protect selected areas of aerospace parts from strong acid or alkaline soluti ons during processing for bonding.AVAQMD Rule 1124 1124-3

Aerospace Assembly and Component Manufacturing Operations (16) Caulking and Smoothing Compound – Semi-solid m aterials which are applied by Hand Application Methods and are used to aerodynami cally smooth exterior vehicle surfaces or fill cavities such as bolt hole accesses. A material shall not be classified as a Caulking and Smoothing Compound if it can also be classified 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.

(18) Chemical Milling – The removal of metal by che mical action of acids or alkalis.

(19) Chemical Milling Maskant – A Coating applied d irectly to aluminum components to protect surface areas when Chemical Milling the component 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 u sed with a Type II Etchant. This definition does not include Bonding Maskants, Critical Use and Line Sealant Maskants, and Seal Coat Maskants. Additionally, ma skants 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 Seal er, and Seal Coat) are not included. Maskants that are defined as Specialty C oatings are not included in this definition.

(20) Chemical Processing Maskant – A Coating applie d directly to an Aerospace Component to protect surface areas when anodizing, aging, bonding, plating, etching, and/or performing other chemical surface o perations on the component.

(21) Clear Topcoat – A Topcoat that contains no vis ible pigments and is uniformly 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 func tional solid film, or the solid film itself.

(23) Coating Application Equipment – Equipment used for applying Coating to a substrate. Coating Application Equipment includes Coating distribution lines, Coating hoses, pressure-pots, spray guns, and hand- application equipment, such as hand-rollers, brushes, daubers, spatulas, and tr owels.

(24) Commercial Exterior Aerodynamic Structure Prim er – A Primer used on aerodynamic components and structures that protrude from the fuselage, such as wings and attached components, control surfaces, ho rizontal stabilizers, vertical fins, wing-to-body fairings, antennae, and landing gear and doors, for the purpose of extended corrosion protection and enhanced adhes ion.

(25) Commercial Interior Adhesive – Materials used in the bonding of passenger cabin interior components. These components must meet th e Federal Aviation Administration ( FAA) fireworthiness requirements.1124-4 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (26) Compatible Substrate Primer – Either compatibl e epoxy Primer or Adhesive Primer. Compatible epoxy Primer is a Primer that i s compatible with the filled elastomeric Coating and is epoxy based. The Compat ible Substrate Primer is an epoxypolyamide Primer used to promote adhesion of e lastomeric Coatings such as Impact-Resistant Coatings. Adhesive Primer is a Coating that (1) inhibits corrosion and serves as a Primer applied to bare me tal surfaces or prior to Adhesive application, or (2), is applied to surface s that can be expected to contain fuel. Fuel-Tank Coatings are excluded from this ca tegory.
(27) Conformal Coating – A Coating applied to elect rical conductors and circuit boards to protect them against electrical discharge damage and/or corrosion.

(28) Corrosion Prevention Compound System – A Coati ng system that provides corrosion protection by displacing water and penetr ating mating surfaces, forming a protective barrier between the metal surface and moisture. Coatings 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 use d in anodizing, plating, Chemical Milling and processing of magnesium, titan ium, or high-strength steel, high-precision aluminum Chemical Milling of deep cu ts, and aluminum Chemical Milling of complex shapes. Materials used for repa irs or to bridge gaps left by scribing operations (i.e., line sealer) are also in cluded 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 cryogenic temperatures (-275oF and below).

(31) Cryoprotective Coating – A Coating that insula tes cryogenic or subcooled surfaces to limit propellant boil-off, maintain str uctural integrity of metallic structures during ascent or re-entry, and prevent i ce formation.

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

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

(34) Dry Lubricative Material – Coatings consisting of lauric acid, cetyl alcohol, waxes or other non-cross linked or resin bound mate rials which act as a dry lubricant or protective coat.

(35) Electric- or Radiation-Effect Coatings – Inclu de electrically conductive Coatings and Radiation-Effect Coatings and Coating systems t he uses of which may include prevention of radar detection.AVAQMD Rule 1124 1124-5

Aerospace Assembly and Component Manufacturing Operations (36) Electronic Wire Coating – The outer electrical insulation 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, aircra ft radomes, and helicopter blades to disperse static energy or reduce electrom agnetic interference.

(38) Elevated-Temperature Skydrol-Resistant Commerc ial Primer – Primer applied primarily to commercial Aircraft (or commercial Air craft adapted for military use) that must withstand immersion in phosphate est er (PE) hydraulic fluid (Skydrol 500b or equivalent) at the elevated temper ature of 150°F for 1,000 hours.

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

(40) Exempt Compounds – A compound identified as ex empt in 40 CFR 51.100(s).

(41) Facility – Any permit unit, group of permit un its, 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 Indus trial Classification manual; and is located on a single parcel of land or on contigu ous property within the District; and which is owned or operated by the same person o r 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 objects or parts.

(43) Fastener Manufacturer – A Facility that coats Aircraft Fasteners, such as pins, collars, bolts, nuts, and rivets, with Solid-Film L ubricants for distribution to other Facilities.

(44) Fire-Resistant (Interior) Coating

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

(b) For military Aircraft, Fire-Resistant Interior Coatings are used on parts that are subject to the flammability requirements o f MIL-STD-1630A and MIL-A-87721.

(c) For space applications, Fire-Resistant Interior Coatings are used on parts that are subject to the flammability requirements o f SE-R-0006 and SSP 30233.1124-6 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (45) Flexible Primer – A Primer that meets flexibil ity requirements such as those needed for Adhesive Bond Primed Fastener heads or o n surfaces expected to contain fuel. The flexible Coating is required bec ause it provides a compatible, flexible substrate over bonded sheet rubber and rub ber-type Coatings as well as a flexible bridge between the Fasteners, skin, and sk in-to-skin joints on outer Aircraft skins. This flexible bridge allows more T opcoat flexibility around Fasteners and decreases the chance of the Topcoat c racking around the Fasteners. The result is better corrosion resistance.

(46) Flight-Test Coating – A Coating applied to an Aircraft prior to flight testing to protect the Aircraft from corrosion and to provide required marking during flight test evaluation.

(47) Fuel-Tank Adhesive – An Adhesive used to bond components exposed to fuel that must be compatible with Fuel-Tank Coatings

. (48) Fuel-Tank Coating, General – A Coating applied to a fuel tank of an Aircraft to protect it from corrosion and/or bacterial growth.

(49) Fuel-Tank Coating, Rapid Cure – A Fuel-Tank Co ating with shortened curing times and decreased sensitivity to low humidity dur ing the curing process.

(50) Hand Application Method – The application of A erospace Materials by manually held, non-mechanically operated equipment. Such eq uipment includes paint brushes, hand rollers, caulking guns, trowels, spat ulas, syringe daubers, rags, and
sponges.
(51) High-Temperature Coating – A Coating that must withstand temperatures of more than 350oF.

(52) High-Volume, Low-Pressure (HVLP) Spray – An Ae rospace Materials application system which is operated with air press ure of between 0.1 and 10 pounds per square inch gauge (psig).

(53) Impact-Resistant Coating – A flexible Coating that protects Aerospace Components, such as Aircraft landing gear, and land ing 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 an d generally 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 chemical reaction. Lacquers are resoluble in their original solvent.AVAQMD Rule 1124 1124-7

Aerospace Assembly and Component Manufacturing Operations (57) Low-Solids Adhesive Coating, Primer or Sealant - An Adhesive Coating, Primer or Sealant which has less than one pound of solids per gallon of material. Such solids are the non-volatiles remaining after a samp le is heated at 230oF (110oC) for one hour.

(58) Low-Solids Corrosion Resistant Primer – A corr osion resistant polyurethane compatible Primer with enhanced adhesion and rain e rosion resistance which contains no more than 45 percent (45%) solids, by w eight, as applied.

(59) Metallized Epoxy Coating – A Coating that cont ains relatively large quantities of flake pigmentation for appearance and/or added prot ection.

(60) Mold Release Coating – A Coating applied to th e surface of a mold to prevent the molded component from sticking to the mold as it is removed.

(61) Non-Structural Adhesive – An Adhesive that bon ds non-load-carrying Aircraft components in non-critical applications and is not covered in any other specialty Adhesive categories.

(62) Optical Anti-Reflection Coating – A Coating wi th a low reflectance in the infrared and visible wavelength range and is used f or anti-reflection on or near optical and laser hardware.

(63) 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.
(64) Phosphate Ester Resistant Ink – A Coating that is used for surface identification or marking which inhibits phosphate ester fluid cor rosion.

(65) Photolithographic Maskant – A Coating applied by Photoresist Operation(s) directly to printed circuit boards, and ceramic and similar substrates to protect surface areas from Chemical Milling or Chemical Pro cessing.

(66) Photoresist Operation – A process for the appl ication or development of photoresist masking solution on a substrate, includ ing preparation, soft bake, develop, hard bake, and stripping, and can be gener ally subdivided as follows:

(a) Negative Photoresist Operation is a process whe re the maskant hardens when exposed to light and the unhardened maskant is stripped, exposing the substrate surface for Chemical Milling or Chemi cal Processing.

(b) Positive Photoresist Operation is a process whe re the maskant softens when exposed to light and the softened maskant is s tripped, exposing the substrate surface for Chemical Milling or Chemical Processing.1124-8 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (67) Pre-Bonding Etchant – An acid or basic substan ce that is used to 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.

(68) Pretreatment Coating – A Coating which contain s no more than 12 percent (12%) solids, by weight and at least 0.5 percent (0.5%) a cid by weight, to provide surface etching and is applied directly to metal su rfaces to provide corrosion resistance, adhesion, and ease of stripping.

(69) Primer – A Coating applied directly to an Aero space Component for purposes of corrosion prevention, protection from the environme nt, functional fluid resistance and/or adhesion of subsequent Coatings, Adhesives, or Sealants.

(70) Primer Compatible with Rain Erosion-Resistant Coating – A Primer to which Rain Erosion-Resistant Coating is applied.

(71) Rain Erosion-Resistant Coating – A Coating tha t protects leading edges, flaps, stabilizers, and engine inlet lips against erosion caused by rain impact during flight.

(72) Repair Coating – A Coating used to recoat port ions of a product which has sustained mechanical damage to the Coating followin g normal painting operations.

(73) Rework – The inspection, repair, and reconditi oning of Aerospace Components subject to this rule.

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

(75) Rocket Motor Nozzle Coating – A catalyzed epox y Coating system used in elevated temperature applications on rocket motor n ozzles.

(76) Rollable, Brushable or Extrudable Sealant – A single or multi-component polymeric material used to seal many types of joint s, gaps, removable panels, and windows where moderate movement is expected. Such material may be applied by rolling brushing extruding or daubing.

(77) 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.

(78) Scale Inhibitor Coating – A Coating that is ap plied to the surface of a part prior to thermal processing to inhibit the formation of tena cious scale.

(79) Screen Print Ink – An ink used in screen print ing processes during fabrication of decorative laminates and decals.AVAQMD Rule 1124 1124-9

Aerospace Assembly and Component Manufacturing Operations (80) Sealant – Viscous semisolid materials that fil l voids in order to seal out water, fuel, and other liquids and solids, and in some cas es, air movement.

(81) Seal Coat Maskant – An overcoat applied over a maskant to improve abrasion and chemical resistance during production operations.

(82) Silicone Insulation Material – An insulating m aterial applied to exterior metal surfaces for protection from high temperatures caus ed by atmospheric friction or engine exhaust. These materials differ from Ablati ve Coatings in that they are not “sacrificial.”

(83) Solid-Film Lubricant – A very thin Coating con sisting of a binder system containing as its chief pigment material one or mor e of the following: molybdenum disulfide, graphite, polytetrafluoroethy lene (PTFE), or other solids that act as a dry lubricant between faying surfaces

. (84) South Coast Air Quality Management District (S CAQMD) – The air quality district created pursuant to Division 26, Part 3, C hapter 5.5 of the California Health & Safety Code (commencing with §40400).

(85) Space Vehicle – A vehicle designed to travel b eyond the earth's atmosphere.

(86) Specialized Function Coating – A Coating that fulfills extremely specific engineering requirements that are limited in applic ation and are characterized by low volume usage. This category excludes Coatings covered in other Specialty Coating categories.

(87) Specialty Coating – A Coating that, even thoug h it meets the definition of a Primer, Topcoat, or self-priming Topcoat, has addit ional performance criteria beyond those of Primers, Topcoats, and self-priming Topcoats for specific applications. These performance criteria may inclu de, but are not limited to, temperature or fire resistance, substrate compatibi lity, antireflection, temporary protection or marking, sealing, adhesively joining substrates, or enhanced corrosion protection.

(88) Stencil Coating – An ink or Coating that is ro lled, sprayed with an airbrush or touch-up gun, or brushed while using a template to add identifying letters and or numbers to Aerospace Components.

(89) Stripper – A volatile liquid applied to remove cured Aerospace Material or their residues.

(90) Structural Adhesive – Autoclavable – An Adhesi ve used to bond load-carrying Aircraft components and is cured by heat and pressu re in an autoclave.

(91) Structural Adhesive, High Temperature – Autocl avable – An Adhesive used to bond load-carrying Aircraft Components which is cur ed by heat and pressure in an autoclave, and can withstand service temperature s above 450 ° F (232 ° C).1124-10 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (92) Structural Adhesive – Non-Autoclavable – An Ad hesive cured under ambient conditions and is used to bond load-carrying Aircra ft components or other critical functions, such as nonstructural bonding in the pro ximity of engines.

(93) Temporary Protective Coating – A Coating appli ed to an Aerospace Component to protect it from mechanical and environmental dam age during manufacturing.

(94) Thermal Control Coating – A Coating formulated with specific thermal conductive or radiative properties to permit temper ature control of the substrate.

(95) Topcoat – A Coating applied over a Primer or o ther Coating on an aerospace vehicle or component for purposes such as appearanc e, identification, camouflage, or protection. Topcoats that are defin ed as Specialty Coatings are not included in this definition.

(96) Touch-Up Operation – The application of Aerosp ace Materials by brush, air brush, detail HVLP spray equipment outside of a per mitted paint enclosure to repair minor surface damage and imperfections after the main Coating process.

(97) 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 per centage.
(98) Type I Etchant – A Chemical Milling etchant th at contains varying amounts of dissolved sulfur and does not contain amines.

(99) Type II Etchant – A Chemical Milling etchant t hat is a strong sodium hydroxide solution containing amines.

(100) Unicoat – A Coating which is applied directly to an Aerospace Component for purposes of corrosion protection, environmental pro tection, and functional fluid resistance that is not subsequently Topcoated.

(101) United States Environmental Protection Agency (USEPA) – The United States Environmental Protection Agency, the Administrator of the USEPA and his or her authorized representative.

(102) Volatile Organic Compound (VOC) – Any volatil e compound containing the element carbon, excluding methane, carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates, ammonium car bonate, and Exempt Compounds as listed in 40 CFR 51.100(s).

(103) Wet Fastener Installation Coating – A Primer or Sealant applied by dipping, brushing, or daubing to Fasteners that are installe d before the Coating is cured.

(104) Wing Coating – A corrosion-resistant Coating that is resilient enough to withstand the flexing of the wings.AVAQMD Rule 1124 1124-11

Aerospace Assembly and Component Manufacturing Operations 

### (C) Requirements

(1) VOC Content of Coatings

(a) A person shall not apply to Aerospace Component s any Aerospace Materials, including any VOC-containing materials a dded to the original Aerospace Materials supplied by the manufacturer, w hich contain VOC in excess of the limits specified below:

SPECIALTY COATING VOC LIMITS Grams Per Liter of Coating Less Water and Less Exem pt Compounds
AEROSPACE MATERIALS VOC Limit

PRIMERS -- General 350 Adhesive Bonding Primers -- Commercial Aircraft 250 Military Aircraft 805 Commercial Exterior Aerodynamic Structure Primer 650 Compatible Substrate Primer 780 Cryogenic Flexible Primer 645 Elevated-Temperature Skydrol-Resistant Commercial P rimer 740
Flexible Primer 640
Low-Solids Corrosion Resistant Primer 350 Primer Compatible with Rain Erosion-Resistant Coati ng 850

COATINGS -- Ablative Coating 600 Adhesion Promoter Coating 850 Antichafe Coating 420 Bearing Coating 620 Chemical Agent-Resistant Coating 550 Conformal Coating 750 Cryoprotective Coating 600 Electric- or Radiation-Effect Coating 800 Electrostatic Discharge and Electromagnetic Interfe rence (EMI) Coating 800 Fire-Resistant (Interior) Coating -- Civilian 650 Military 800 Space 800 Flight-Test Coating -- Used on Missiles or Single Use Aircraft 420
All Other 840 Fuel-Tank Coating -- General 420 Rapid Cure 7201124-12 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations High-Temperature Coating 850 Impact-Resistant Coating 420 Intermediate Release Coating 750 Lacquer Coating 830 Metallized Epoxy Coating 700 Mold Release Coatings 780 Optical Anti-Reflection Coating 700 Part Marking Coating 850 Pretreatment Coating 780 Rain Erosion-Resistant Coating 800 Rocket Motor Nozzle Coating 660 Scale Inhibitor Coating 880 Space-Vehicle Coatings, Other: does not include Ele ctric Discharge and EMI Protection Coating or Fire-Resistant (Interior) Coating 1000 Specialized Function Coating 890 Temporary Protective Coating 250 Thermal Control Coating 800 Topcoat -- Clear 520 Epoxy Polyamide 660
Other 420 Unicoat Coating 420 Wet Fastener Installation Coating 675 Wing Coating 750 Wire Coatings Electronic Wire Coating 420 Anti-Wicking 420 Pre-Bonding Etchant 420 Phosphate Ester Resistant Ink 925

ADHESIVES -- Commercial Interior Adhesive 760 Cyanoacrylate Adhesive 1020
Fuel-Tank Adhesive 620
Non-Structural Adhesive 250 Rocket Motor Bonding Adhesive 890
Rubber-Based Adhesive 850 Space Vehicle Adhesive 800
Structural Adhesive -- Autoclavable 50 High Temperature - Autoclavable 650
Non-Autoclavable 850

SEALANTS -- Rollable, Brushable or Extrudable Sealant 280
Fastener Sealant 675AVAQMD Rule 1124 1124-13

Aerospace Assembly and Component Manufacturing Operations

Other 600

MASKANTS -- Bonding Maskant 1230
Critical Use and Line Sealer Maskant 750 Chemical Milling Maskant 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* Photolithographic Maskant 850
Seal Coat Maskant 1230

LUBRICANTS -- Fastener Installation Lubricant (applied at time of Aircraft/component assembly) -- Solid-Film Lubricant 880 Dry Lubricative Material 675 Fastener Lubricative Coating (applied at time of Fa stener Manufacture) --
Solid-Film Lubricant 250 Dry Lubricative Material 120 Barrier Coating 420 Non-Fastener Lubricative Coatings (applied at time of non-Fastener Manufacture) -- Solid-Film Lubricant 880 Dry Lubricative Materials 675

OTHER -- Caulking and Smoothing Compound 850 Corrosion Prevention Compound System 710 Insulation Covering 740
Screen Print Ink 840
Silicone Insulation Material 850
(b) Documents shall be provided to the APCO demonst rating that the Unicoat is being used in lieu of the application of a Prime r and Topcoat, and the applicant must receive written approval for the use of the Unicoat specifying the conditions of application from the A PCO.

(c) For Low-Solids Adhesives, Coatings, Primers or Sealants, the appropriate limits in subparagraph (C)(1)(a) shall be expressed in grams of VOC per liter 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:1124-14 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (i) The VOC composite partial pressure is 45 mm Hg or less at a temperature of 20 ° C (68 ° F); or (ii) The material contains 200 grams or less of VOC per liter of material.

(b) A person shall not use Stripper on Aerospace Co mponents 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 ° C (68 ° F).

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

(3) Equipment Cleaning Operations

Cleaning of Coating Application Equipment shall com ply with provisions of Rule 1171 – Solvent Cleaning Operations

. (4) Storage of VOC-Containing Materials

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 n on-absorbent, non-leaking containers which shall be kept closed at all times except during extraction or introduction of material for mixing, use or storage

. (5) Transfer Efficiency

No person or Facility shall apply Aerospace Materia l unless it is applied with properly operating equipment or controlled, accordi ng to operating procedure specified by the equipment manufacturer or the APCO , and by the use of one of the following methods:

(a) Electrostatic application;

(b) Flow coater;

(c) Roll coater;

(d) Dip coater;

(e) High-Volume, Low-Pressure (HVLP) Spray;

(f) Hand Application Methods;

(g) Such other alternative application methods as a re demonstrated to the APCO, using District-approved procedures, to be cap able of achieving at least an equivalent Transfer Efficiency to method ( C)(5)(e) and for which written approval of the APCO has been obtained; orAVAQMD Rule 1124 1124-15

Aerospace Assembly and Component Manufacturing Operations

(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 equipment provided that the VOC emissions from such operations and/or mater ials 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 reducing the output of the air pollution control device to less than 50 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 generate d by the sources of emissions.

(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 Materials to be applied to any Aircraft Component subject to the pr ovisions of this rule that does not meet the limits and requirements of t his rule, or of an Alternative Emission Control Plan (AECP) approved p ursuant 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 pu rsuant 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 District shall, on January 1 and July 1 of each year, submit a status report describing the1124-16 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations progress toward the development of Aerospace Materi als which satisfy future compliance dates. These reports shall conta in, 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 compli ance dates is achieved and a status report is submitted documenting such, no further status reports need be submitted.


### (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 Material shall be determined by using the following formulas as applicable:

(i) For Aerospace Materials not containing reactive diluents, grams of VOC per liter of Coating, less water and less Exemp t Compounds shall be determined as follows:

   ⁄ = − −
  −  − 

Where:    ⁄ = 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 Exempt Compounds, in grams. V m = Volume of material, in liters. V w = Volume of water, in liters. V es = Volume of Exempt Compounds, in liters.

(ii) For Aerospace Materials that contain reactive diluents, grams of VOC per liter of coating, less water and less Exemp t Compounds shall be determined as follows:AVAQMD Rule 1124 1124-17

Aerospace Assembly and Component Manufacturing Operations    ⁄ = − −
  −  − 

Where:    ⁄ = Grams of VOC per liter of Coating, less Water and

less Exempt Compounds. W s = Weight of volatile compounds evolved during

curing and analysis, in grams. W w = Weight of water evolved during curing and

analysis, in grams. W es = Weight of Exempt Compounds 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 Exempt Compounds 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:

   ⁄ = − −

 
Where:    ⁄ = Grams of VOC per liter of Coating W s = Weight of volatile compounds, in grams. W w = Weight of water, in grams. W es = Weight of Exempt Compounds, in grams. V m = Volume of material, in liters.

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

  =  

  ×  

 +  + ∑ 

    



Where: W i = Weight of the “i”th VOC compound, in grams. W w = Weight of water, in grams. W e = Weight of Exempt Compound, in grams. MW i = Molecular weight of the “i”th VOC compound, in

grams per gram-mole. MW e = Molecular weight of Exempt Compound, 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,1124-18 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations 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 Solids of Surface Coatings, Code of Federal Regulat ions Title 40, Part 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 Me thod 24. b. The exempt solvent content shall be determined u sing SCAQMD Test Methods 302-91 (Distillation of Solvent s 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; (ii) SCAQMD Test Methods 302, 303, and 304 (SCAQMD “Laboratory Methods of Analysis for Enforcement Sam ples” manual).

(b) The following classes of compounds listed below will be analyzed as Exempt Compounds for compliance with subdivision (C ), only at such time as manufacturers specify which individual comp ounds are used in the Coating formulations and identify the test methods, which, prior to such analysis, have been approved by the USEPA and the S CAQMD, that can be used to quantify the amounts of each Exempt Comp ound.

(i) Cyclic, branched, or linear, completely fluorin ated alkanes; cyclic, branched, or linear, completely fluorinated ethers with no unsaturations; cyclic, branched, or linear, complet ely fluorinated tertiary amines with no unsaturations; and sulfur-c ontaining perfluorocarbons with no unsaturations and with sul fur 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 G aseous NonMethane Emissions, February 1991) or SCAQMD Test Me thod 25.3 (Clean-Fueled Combustion Sources, March 2000). Emi ssions determined to exceed any limits established by this rule throu gh the use of either of the above-referenced test methods shall constitute a violation of this rule.AVAQMD Rule 1124 1124-19

Aerospace Assembly and Component Manufacturing Operations

(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 Re sources Board, and the SCAQMD.

(c) The Transfer Efficiency of alternative Coating application methods shall be determined in accordance with the SCAQMD method “Spray Equipment Transfer Efficiency Test Procedure for Eq uipment User, May 24, 1989.”

(d) The identity and quantity of components in solv ents shall be determined in accordance with SCAQMD test method 308-91 (Quantita tion of Compounds by Gas Chromatography, February 1993) con tained in the SCAQMD “Laboratory Methods of Analysis for Enforcem ent Samples” manual. The VOC composite partial pressure is calc ulated using the equation in paragraph (E)(1)(c).

(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 requi rement of this rule established by any one of the specified test method s or set of test methods 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 APC O.


### (F) Administrative Requirements

(1) Rule 442 Applicability

(a) Any Aerospace Material or Facility which is exe mpt from all or a portion of this rule, shall comply with the provisions of R ule 442 – Usage of Solvents

. 

### (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 suc h formulations applied annually at a Facility is less than 200 gallons.

(2) The provisions of subdivision (C) of this rule shall not apply to a Facility which uses a total of less than three (3) gallons of VOC- containing Aerospace Materials on each and every day of operation.1124-20 AVAQMD Rule 1124 Aerospace Assembly and Component Manufacturing Operations (3) The provisions of paragraphs (C)(1) and (C)(5) of this rule shall not apply to incidental corrosion maintenance Repair Coating ope rations at military Facilities, provided that the Coating use at any maintenance re pair location within the Facility does not exceed 1.5 gallons per day, and t he total Coating usage for such operations at the Facility does not exceed five (5) gallons per day.

(4) The provisions of subparagraph (C)(2)(a) shall not apply to Space Vehicle 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 Stencil Coatings provided that the Touch-up Operati ons and Stencil Coatings do not exceed 25 sq. ft. per Aircraft.

(7) The provisions of paragraph (C)(1) shall not ap ply to the recoating of assembled Aircraft at Rework facilities if original Coating f ormulations are used.

(8) The provisions of paragraph (C)(1) shall not ap ply to Adhesives with separate formulations that are used in volumes of less than ten (10) gallons per year.

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

(10) The provisions of paragraph (C)(2) of this rul e do not apply to the surface cleaning of solar cells, fluid systems, avionic equ ipment, and laser optics.

(11) The provisions of subdivision (D)(1) and (C)(5 ) shall not be applied to the application of materials that contain less than 20 grams per liter of VOC per liter of material.

(12) The provisions of paragraph (C)(5) shall not a pply to the use of materials dispensed from airbrush operations provided that th e paint reservoir on the air brush is eight (8) ounces or less and that the tota l amount of Coating used for Air Brush Operations at the Facility does not exceed fi ve (5) gallons per year.

(13) The provisions of this rule shall not apply to Aerosol Coating Products.

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