SLOAPCD RULE 423 MOTOR VEH. & MOBILE EQUIP. COATING OPS.

LAST REVISED 06/22/93





RULE 423. MOTOR VEHICLE AND MOBILE EQUIPMENT COATING OPERATIONS

(Adopted 2/23/88; Revised 9/4/90; 11/19/91;

2/9/93; 6/22/93)

A. APPLICABILITY

The provisions of this Rule apply to any person who

supplies, sells, offers for sale, applies or specifies

the use of coatings for motor vehicles, mobile

equipment, and their parts or components.

B. DEFINITIONS

For the purposes of this Rule the following definitions

shall apply:

1. "Anti-Glare/Safety Coatings": A coating

formulated to eliminate glare for safety purposes

on interior surfaces of a vehicle and which shows

a reflectance of 25 or less on a 60 degree meter.

2. "APCO": Air Pollution Control Officer.

3. "Basecoat/Clearcoat System": A topcoat system

composed of a pigmented basecoat portion and two

transparent clearcoat portions.

Basecoat/clearcoat systems' ROG content shall be

calculated according to the following formula:

ROGbc + 2 ROGcc

ROG Tbc/cc = ------------------

3

Where:

ROG Tbc/cc = the average of the sum of the ROG

content as applied in the basecoat

(bc) and clearcoat (cc) system

ROGbc = the basecoat ROG content

2 ROGcc = two times the clearcoat ROG content

4. "Camouflage Coating": A coating used, principally by

the military, to conceal equipment from detection.

5. "Catalyst": A substance whose presence initiates the

reaction between chemical compounds.

6. "Coating": A liquid, liquefiable or mastic composition

which is converted to a solid protective, decorative, or

functional adherent film after application as a thin

layer.

7. "Color Match": The ability of a coating to blend into

an existing coating so that color difference is not

visible.

8. "Controlled Area": A limited spraying area commonly

used for noncontinuous "touch-up" operations, where

coating applications do not exceed nine (9) square feet

per vehicle.

9. "Electrophoretic Dip": A coating application method

where the coating is applied by dipping the component

into a coating bath and an electrical potential

difference exists between the component and the bath.

10. "Electrostatic Application": A sufficient charging

of atomized paint droplets to cause deposition

principally by electrostatic attraction. This

application shall be operated at a minimum of 60 KV

power.

11. "Exempt Organic Compounds": Any of the following

compounds: methane, carbon monoxide, carbon dioxide,

carbonic acid, metallic carbides or carbonates,

ammonium carbonate, 1,1,1-trichloroethane, methylene

chloride, trichlorofluoromethane (CFC-11),

dichlorodifluoromethane (CFC-12),

chlorodifluoromethane (HCFC-22), trifluoromethane

(HFC-23), 1,1,1-trichloro-2,2,2-trifluoroethane

(CFC-113), 1-chloro-1,1-difluoro-2-chloro-2,2-

difluoroethane (CFC-114), chloropentafluoroethane

(CFC-115), 2,2-dichloro-1,1,1-trifluoroethane

(HCFC-123), 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-

124), pentafluoroethane (HFC-125), 1,1,2,2-

tetrafluoroethane (HFC-134), 1,1,1,2-

tetrafluoroethane (HFC-134a), 1,1-dichloro-1-

fluoroethane (HCFC-141b), 1-chloro-1,1-difluoroethane

(HCFC-142b), 1,1,1-trifluoroethane (HFC-143a), 1,1-

difluoroethane (HFC-152a), and the following four

classes of perfluorocarbon (PFC) compounds:

a) cyclic, branched, or linear, completely fluorinated

alkanes,

b) cyclic, branched, or linear, completely fluorinated

ethers with no unsaturations,

c) cyclic, branched, or linear, completely fluorinated

tertiary amines with no unsaturations, and

d) saturated perfluorocarbons containing sulfur with

sulfur bonds only to carbon and fluorine.

Perfluorocarbon compounds shall be assumed to be absent

from a product or process unless a manufacturer or

facility operator identifies the specific individual

compounds and the amounts present in the product or

process and identifies a validated test method which can

be used to quantify the specific compounds.

12. "Extreme Performance Coating": Any coating used on

the surface of a Group II vehicle, mobile equipment

or their parts of components which during intended

use is exposed to extreme environmental conditions

during the device's principal use.

13. "Finishing": Any coating of incomplete vehicles,

their parts and components, or mobile equipment for

which the original coating was not applied at an

Original Equipment Manufacturing plant coating

assembly line.

14. "Grams of ROG per Liter of Coating Less Water and

Less Exempt Organic Compounds": The weight of ROG

per combined volume of ROG and coating solids,

calculated by the following equation:

Grams of ROG per Liter Ws - Ww - Wes

of Coating less Water = -------------

and Less Exempt Organic Vm - Vw - Ves

Where: Ws = Weight of volatile compounds (gram)

Ww = Weight of water (grams)

Wes = Weight of exempt organic compounds (grams)

Vm = Volume of coating material (liters)

Vw = Volume of water (liters)

Ves = Volume of exempt organic compounds liters)

15. "Group I Vehicles": These include motorized

vehicles, passenger cars, large/heavy duty truck cabs

and chassis, light and medium duty trucks, vans, and

motorcycles.

16. "Group II Vehicles/Equipment": These include public

transit buses and mobile equipment.

17. "Gun Washer": Electrically or pneumatically operated

system that is designed to clean spray application

equipment while enclosed. A gun washer may also be

considered a gun cleaning system that consists of

spraying solvent into an enclosed container using a

leak-free fitting.

18. "Hand Application Methods": The application of

coatings by nonmechanical hand-held equipment

including by not limited to paint brushes, hand

rollers, caulking guns, trowels, spatulas, syringe

daubers, rags, and sponges.

19. "High-Volume, Low-Pressure Application (HVLP)":

Spray equipment which uses a high volume of air

delivered at pressures between 0.1 and 10 psig and

which operates at a maximum fluid delivery pressure

of 100 psig.

20. "Lacquer": Any coating that dries primarily by

solvent evaporation and is resoluble in its original

solvent.

21. "Lacquer Spot/Panel Repair": The nonassembly line

process of repairing and restoring a portion of a

motor vehicle to predamaged condition using a lacquer

coating.

22. "Large Production/Utility Bodies": The production of

utility bodies at a rate greater than 20 vehicles per

day.

23. "Low Emission Spray Gun Cleaner": Any properly used

spray equipment clean-up device which has passive

solvent losses of no more than 0.6 grams per hour and

has active solvent losses of no more than 15 grams

per operating cycle, as defined by the test method

referenced in Subsection F.7.

24. "Metallic/Iridescent Topcoat": Any coating which

contains more than 5 g/l (0.042 lb/gal) of iridescent

particles composed of metal or metallic particles,

such as mica or silicon, as applied, where such

particles are visible in the dried film.

25. "Mobile Equipment": Any equipment which may be drawn

or is capable of being driven on a roadway,

including, but not limited to, truck bodies, truck

trailers, camper shells, mobile cranes, bulldozers,

construction and farm heavy equipment, concrete

mixers, street cleaners, golf carts, all terrain

vehicles, implements of husbandry, and hauling

equipment used inside and around airports, docks,

depots, and industrial and commercial plants,

excluding utility bodies.

26. "Motor Vehicle": A vehicle which is self-propelled

and which is physically capable of being driven on a

highway, as defined in Section 415 of the California

Vehicle Code.

27. "Paint Spray Booth": A controlled enclosure which

meets Uniform Fire Code standards, exhausts through

filters or other APCO-approved air pollution control

device and provides adequate ventilation, air

velocity, and safety features, as required by the

Code.

28. "Precoat": Any coating which is applied to bare

metal primarily to deactivate the metal surface for

corrosion resistance to a subsequent water-based

paint.

29. "Pretreatment Wash Primer": Any coating which

contains a minimum of 0.5% acid by weight, is

necessary to provide surface etching and is applied

directly to bare metal surfaces to provide corrosion

resistance and adhesion.

30. "Primer": Any coating applied prior to the

application of a topcoat for the purpose of corrosion

resistance and adhesion of the topcoat.

31. "Primer Sealer": Any coating applied prior to the

application of a topcoat for the purpose of corrosion

resistance, adhesion of the topcoat, color

uniformity, and to promote the ability of an

undercoat to resist penetration by the topcoat.

32. "Primer Surfacer": Any coating applied prior to the

application of a topcoat for the purpose of corrosion

resistance, adhesion of the topcoat, and which

promotes a uniform surface by filling in surface

imperfections.

33. "Reactive Organic Compound (ROG)": Any organic

compound containing at least one atom of carbon,

excluding exempt organic compounds. For the purposes

of this Rule ROG is equivalent to ROC and VOC.

34. "Reducer": Any volatile liquid used to reduce the

viscosity of the coating. This liquid may be

solvents, diluents or mixtures of both.

35. "Refinishing": Any coating of vehicles, their

exterior parts or components, or mobile equipment,

including partial body collision repairs, for the

purpose of protection or beautification and which is

subsequent to the original coating applied at an

Original Equipment Manufacturing (OEM) plant coating

assembly line.

36. "Repair": Recoating portions of a previously coated

vehicle wherein the coating has been damaged

following the normal painting operation.

37. "Small Production/Utility Bodies": The production of

utility bodies at a rate of 20 vehicles per day or

less.

38. "Specialty Coatings": Coatings which are necessary

due to unusual and uncommon job performance

requirements. These coatings include, but are not

limited to, adhesion promoters, uniform finish

blenders, elastomeric materials, gloss flatteners,

bright metal, and trim repair coatings.

39. "Spot Primering": Small area application of a primer

to prevent rust or fill surface irregularities prior

to the application of the main coating.

40. "Three Stage Coating System": A topcoat system

composed of a pigmented basecoat portion, a

semi-transparent midcoat portion, and two transparent

clearcoat portions. Three-stage coating systems' ROG

content shall be calculated according to the

following formula:



ROGbc + ROGmc + 2 ROGcc

ROG T3-stage = -----------------------

4

Where: ROG T3-stage = the average of the sum of

the ROG content as

applied in the basecoat

(bc), the midcoat (mc),

and the clearcoat (cc)

system

ROGbc = the basecoat ROG content

ROGmc = the midcoat ROG content

2 ROGcc = two times the clearcoat ROG content

41. "Topcoat": Any coating applied over a primer or an

original OEM finish for the purpose of protection or

appearance. For the purposes of this Rule, either a

basecoat/clearcoat system or 3-state coating system

shall be considered jointly as a topcoat.

42. "Touch-up": Coating operation incidental to the main

coating process necessary to cover minor

imperfections.

43. "Transfer Efficiency": The ratio of the weight of

coating solids which adhere to the object being

coated to the weight of coating solids used in the

application process, expressed as a percentage.

44. "Utility Body": A special purpose compartment or

unit that will be bolted, welded, or affixed onto an

existing cab and chassis. The compartment may serve

as storage for equipment or parts.

C. EXEMPTIONS

1. Any motor vehicle or mobile equipment coating operation

which only uses hand-held, nonrefillable aerosol cans,

18 ounces or less, shall be exempt from this Rule.

2. Any coating or cleaning operation subject to the

requirements of this Rule shall be exempt from the

requirements of Rule 411, Surface Coating of Metal Parts

and Products, and Rule 407, Organic Materials.

3. The following Subsections of this Rule shall not apply

to the painting of a Group I or Group II

vehicle/equipment by the resident of a one or two family

dwelling, if that resident is the registered owner of

the vehicle or equipment being painted: D.6. Transfer

Efficiency, D.9. Spray Booth, and E. Recordkeeping. The

operation shall not cause a public nuisance and shall be

in compliance with local fire protection agency

requirements.

4. Subsection D.9. of this Rule, Spray Booth, shall not

apply to repair, touch-up, or spot-primering operations

which do not exceed a total of nine square feet per

vehicle. All such operations shall be conducted in a

controlled area such that the potential for posing a

public nuisance including particulate overspray and

odors is not established.

5. Coating operations of Group II vehicles/equipment which

cannot be reasonably conducted in an available spray

booth due to the size and shape of the device may be

exempted from Subsection D.9. of this Rule, Spray Booth,

on a case-by-case basis with prior written approval of

the APCO.

D. REQUIREMENTS

1. Group I and II Vehicles/Equipment (color match

required). After the applicable effective date

indicated below, no person shall finish or refinish any

Group I vehicle, their parts and components, any Group

II vehicles and mobile equipment where color match is

required, or any small production/utility bodies where

color match is required, using any coating with an ROG

content in excess of the following limits, expressed as

grams of ROG per liter of coating applied, excluding

water and exempt organic compounds:

Limits

Grams of ROG per Liter of Applied Coating, Less Water

and Less Exempt Organic Compounds

Effective Dates

6/22/93 1/1/95

------- ------

g/L (lbs/gal) g/L (lbs/gal)

--- --------- --- ---------

Pretreatment Wash Primer 780 (6.5) 420 (3.5)

Precoat 780 (6.5) 420 (3.5)

Primer/Primer Surfacer 600 (5.0) 250 (2.1)

Primer Sealer 420 (3.5) 340 (2.8)

Topcoat 600 (5.0) 460 (3.8)

Metallic/Iridescent Topcoat 600 (5.0) 540 (4.5)

Specialty Coating 840 (7.0) 840 (7.0)

2. Group II Vehicles/Equipment (no color match required).

After the applicable effective date indicated below, no

person shall finish or refinish Group II vehicles and

equipment or their parts and components where color

match is not required, small production/utility bodies

where color match is not required, or large

production/utility bodies, using any coating with a ROG

content in excess of the following limits, expressed as

grams of ROG per liter of coating applied, excluding

water and exempt organic compounds:

Limits

Grams of ROG per Liter of Applied Coating, Less Water

and Less Exempt Organic Compounds

Effective Dates

11/19/92 1/1/95

-------- ------

g/L (lbs/gal) g/L (lbs/gal)

--- --------- --- ---------

Pretreatment Wash Primer 780 (6.5) 420 (3.5)

Precoat 780 (6.5) 420 (3.5)

Primer 340 (2.8) 250 (2.1)

Topcoat 420 (3.5) 340 (2.8)

Metallic/Iridescent Topcoat 420 (3.5) 420 (3.5)

Extreme Performance 750 (6.2) 420 (3.5)

Camouflage 420 (3.5) 420 (3.5)

Specialty Coating 840 (7.0) 840 (7.0)

3. Extreme Performance Coating Petition: Any person

seeking to use an extreme performance coating in any

coating operation shall comply with all of the

following requirements until 1/1/95, at which time

these conditions do not apply.

a. A petition shall be submitted to the APCO stating

the performance requirements, volume of coating to

be used, and ROG level that is attainable.

b. If the APCO grants approval, then that approval

shall be valid for one year. If applicable, such

petition shall be resubmitted by the applicant on an

annual basis.

4. Lacquer Spot/Panel Repair Limits: Effective November

19, 1992, until May 19, 1993, a person shall not

spot/panel repair Group I vehicles with existing

nitrocellulose or synthetic lacquer finishes using a

lacquer coatings in excess of the following limits,

expressed as grams of ROG per liter of coating applied,

excluding water and exempt organic compounds.

Limits

Grams of ROG per Liter of Applied Coating, Less Water

and Less Exempt Organic Compounds

g/L (lbs/gal)

--- ---------

Pretreatment Wash Primer 780 (6.5)

Precoat 780 (6.5)

Primer/Primer Surfacer 720 (6.0)

Primer Sealer 780 (6.5)

Topcoat 780 (6.5)

Effective May 19, 1993, a person shall not spot/panel

repair Group I vehicles with existing lacquer finishes

using any coating with an ROG content in excess of the

standards set forth in Subsection D.1.

5. Add-On Control Equipment Option: A person may comply

with the provisions of Subsection D. by using air

pollution control equipment provided that:

a. The emissions collection device shall capture at

least 90 percent, by weight, of all the organic

emissions from the source to the control equipment,

and

b. The abatement device shall reduce the organic

emissions by at least 95 percent, by weight, and

c. Written approval for such equipment is received from

the APCO prior to installation.

6. Transfer Efficiency: No person shall apply any coating

to any Group I or II vehicle or mobile equipment or

their exterior parts and components unless one of the

following methods is properly used and has been

demonstrated to have achieved a transfer efficiency of

at least 65%:

a. Hand application methods;

b. Electrophoretic Dip coating;

c. Electrostatic application;

d. High-Volume, Low-Pressure (HVLP) application; or

e. Any other coating application method which has been

demonstrated to the APCO to be capable of achieving

at least 65 percent transfer efficiency.

7. Surface Preparation and Cleanup Solvent: The

requirements of this Subsection shall apply to any

person using organic solvent for surface preparation

and cleanup.

a. Closed containers approved by the local fire marshal

shall be used for the storage or disposal of

solvent-containing cloth or paper used for surface

preparation and cleanup. Containers shall be

nonabsorbent.

b. All ROG containing materials, including but not

limited to, fresh or spent solvent, coatings, and

reducers, shall be kept in approved, closed

containers when not in use.

c. No person shall use organic compounds for spray

equipment cleanup unless:

1) An enclosed system, or other system that has

been demonstrated to be at least equivalent and

has been approved by the Air Pollution Control

Officer, is properly used for cleaning, and

2) The composite vapor pressure of organic

compounds used is less than 45 mm Hg at a

temperature of 20 degrees Celsius. Until July

1, 1993, this requirement (Subsection D.7.c.2)

shall not apply to any low emission spray gun

cleaner.

d. No person shall use ROG-containing materials which

have a ROG content of more than 200 grams per liter

of material for substrate surface preparation just

prior to coating. Higher ROG-containing materials

may be used for the removal of wax and grease, but

shall not exceed 744 g/L (6.2 lb ROG/gal) of

material.

8. Specialty Coatings: No person shall use any specialty

coating with a ROG content in excess of 840 g ROG/L of

coating applied (7.0 lbs/gal), excluding water and

exempt organic compounds. Use of all specialty

coatings, except antiglare/safety coatings, shall not

exceed 5.0 percent of all coatings applied, on a daily

basis, averaged over a 12 month period.

9. Spray Booth: No Group I or Group II motor

vehicle/equipment, parts, or components shall be

painted, in whole or in part, without using an approved

spray booth, except as noted in Subsection C.,

Exemptions. All spray booths must be approved by the

local fire marshal.

10. Prohibition of Specification: No person shall

solicit, require for use, or specify the application

of a coating on a Group I or II vehicle, mobile

equipment, or their parts or components if such use

or application results in a violation of the

provisions of this Rule. The prohibition of this

Section shall apply to all written or oral contracts

under the terms of which any coating which is

subject to the provisions of this Rule is to be

applied to any motor vehicle, mobile equipment, or

their parts and components at any physical location

within the District.

11. Prohibition of Sale: No person shall supply, offer

for sale, or sell within the District any coating,

except hand-held, nonrefillable aerosol cans of 18

ounces or less, if the application of such product

is prohibited, at the time of sale, by this Section.

Compliance with this prohibition shall be determined

by measuring the ROG content of each and every

component of a coating or coating system which has

been reduced using the manufacturer's recommended

type and maximum amount of reducer. The prohibition

of this Subsection shall apply to the wholesale or

retail sale of any coating that will be applied at

any physical location within the District and shall

not apply to any coating shipped outside of the

District for use outside of the District.

This requirement shall not apply to the sale or offer

of sale of any specially designated coating to any

person operating approved air pollution control

equipment that meets the requirements of Subsection D.5

if:

a. The coating container clearly states: "Use of this

coating is a violation of San Luis Obispo County

APCD Rule 423 unless the ROG emissions from this

coating are controlled by an APCO-approved ROG

add-on control device". Removal or defacing of this

statement constitutes a violation of the Rule; and

b. For each and every amount of this specially

designated coating sold, the seller shall maintain a

record identifying each buyer's name and address,

APCD permit number of the buyer's facility, and

amount of each coating sold. This record must be

kept for a minimum of two years and made available

to the District upon request.

12. Compliance Statement Requirement: The manufacturer

of coatings subject to this Rule shall include ROG

designations, as supplied, including coating

components, expressed in grams per liter or pounds

per gallon, excluding water and exempt organic

compounds, on labels or data sheets. This

designation shall include a statement of

manufacturer's recommendation regarding thinning,

reducing, or mixing with any other ROG containing

materials. This statement shall include a

designation of ROG on an as-applied basis, excluding

water and exempt solvent based on the manufacturer's

recommendations. Omission of this designation shall

constitute a violation of this Rule.

13. Coating Containing 1,1,1-Trichloroethane: No person

shall apply any coating to any motor vehicle, mobile

equipment, or their parts or components, if that

coating contains 1,1,1-trichloroethane.

E. RECORDKEEPING REQUIREMENTS

1. Any person subject to this Rule shall:

a. Maintain and have available during any District

inspection, a current list of coatings (including

specialty coatings) in-house that provides all of

the coating data necessary to evaluate compliance,

including the following information, as applicable:

1) The brand name of coating, catalyst and reducer

used, listed by part number

2) Mix ratio of components used.

3) ROG content of coating, as applied.

4) The coating category from Subsection D.1 or D.2,

Requirements, that corresponds to each coating

used.

5) Type of vehicle or equipment to which the

coating was applied.

b. Maintain records which show on a daily basis the

following information:

1) The brand name, part number, and coating

category of each coating used.

2) Coating and mix ratio (unit to unit) of

components in each coating used.

3) Quantity of each coating, catalyst, and reducer

(including each specialty coating) applied in

ounces or grams. This quantity need not include

toners that are added for color matching after

preparation of the initial weighed color batch.

2. Any person subject to the requirements of this Rule

shall have the manufacturer's specification sheets of

solvents used for substrate surface cleaning available

for review and shall maintain records which show on a

monthly basis, the following for each solvent:

a. Type.

b. ROG content of solvent, in grams per liter.

c. Volume of solvent used per day. If purchase records

are used to determine the amount of solvents used,

then records and manifests of the amounts of

solvents disposed of or sent to a recycler must also

be maintained and made available to the APCO upon

request.

3. Any person producing utility bodies must keep records

of the number of utility bodies coated each day.

4. All records shall be retained and available for

inspection by District personnel for the previous 24

month period.

F. TEST METHODS

1. Coating ROG content shall be determined using EPA

Method 24. The exempt organic compound content of

coatings or solvents shall be determined using ASTM

Method D4457-85.

2. The measurement of acid content of pretreatment wash

primers shall be done in accordance with ASTM Method D

1613-85 (modified).

3. The measurement of the metal and silicon content of

metallic/iridescent coatings shall be determined by

South Coast AQMD Method 311 contained in "Laboratory

Method of Analysis for Enforcement Samples, Rev 1991."

4. The collection and capture efficiency of organic

emissions, as specified in Subsections D.5,

Requirements, shall be measured as follows:

a. Capture efficiency shall be determined by the EPA

Guidelines for Developing Capture Efficiency

Protocols from the Federal Register, Part 55, FR

26865, June 29, 1990.

b. Measurement of vapor flow through pipes shall be

determined by EPA Method 2A.

c. Measurement of ROG vapor concentration shall be

determined by EPA Method 25A or EPA Method 25B.

5. Transfer Efficiency shall be determined by using a

method which shall:

a. Be modeled after the test method described in the

EPA document (EPA/600/2-88-26b) "Development of

Proposed Standard Test Method for Spray Painting

Transfer Efficiency."

b. Simulate the transfer efficiency achieved during the

actual operations.

c. Have received prior written approval by the APCO.

6. The composite vapor pressure of a blended solvent shall

be determined by quantifying the amount of each organic

compound in the blend using gas chromatographic

analysis (ASTM 2306-81) and by calculating the

composite vapor pressure of the solvent by summing the

partial pressures of each compound at 20 degrees

Celsius. For the purposes of this calculation, the

blend shall be assumed to be an ideal solution where

Raoult's Law applies.

7. The active and passive solvent losses from spray gun

cleaning systems shall be determined using South Coast

Air Quality Management District's "General Test Method

for Determining Solvent Losses from Spray Gun Cleaning

Systems" dated October 3, 1989. The test solvent for

this determination shall be any lacquer thinner with a

minimum vapor pressure of 105 mm Hg at 20 degrees

Celsius. The minimum test temperature shall be 15

degrees Celsius.

8. The reflectance of anti-glare safety coatings shall be

measured by ASTM Test Method D-523.

G. COMPLIANCE SCHEDULE

For the purpose of this Rule the following compliance

schedule shall apply:

1. All subsections of this Rule shall apply to any new

facility or source obtaining a District Permit to

Operate on or after November 19, 1991.

2. For all existing facilities which either use, specify,

or sell coatings within the District, all Subsections

of the Rule shall apply on November 19, 1992.

3. Subsection D.9., Spray Booth, shall apply to all

existing facilities and sources on November 19, 1991.