PURPOSE: This rule specifies equipment, operating procedures and training requirements for the reduction of volatile organic compound emissions from solvent metal cleaning operations in the St. Louis metropolitan area.

1. (1) Application.

   1. (A) This rule shall apply throughout the city of St. Louis and St. Charles, St. Louis, Jefferson and Franklin Counties.
   2. (B) This rule shall apply to all installations that emit volatile organic compounds (VOCs) from solvent metal cleaning or degreasing operations.
   3. (C) This rule applies to all processes which use cold cleaners, open-top vapor degreasers or conveyorized degreasers, using nonaqueous solvents to clean and remove soils from metal surfaces.

2. (2) Definitions.

   1. (A) Airless cleaning system—A degreasing machine that is automatically operated and seals at a differential pressure of 25 torr (25.0 millimeters of Mercury (mmHg) (0.475 pounds per square inch (psi)) or less, prior to the introduction of solvent vapor into the cleaning chamber and maintains differential pressure under vacuum during all cleaning and drying cycles.
   2. (B) Air-tight cleaning system—A degreasing machine that is automatically operated and seals at a differential pressure no greater than 0.5 pounds per square inch gauge (psig) during all cleaning and drying cycles.
   3. (C) Aqueous solvent—Any solvent consisting of sixty percent (60%) or more by volume water with a flashpoint greater than ninetythree degrees Celsius (93°C) (one hundred ninety-nine point four degrees Fahrenheit (199.4°F)) and is miscible with water.
   4. (D) Electronic components—All portions of an electronic assembly, including, but not limited to, circuit board assemblies, printed wire assemblies, printed circuit boards, soldered joints, ground wires, bus bars, and associated electronic component manufacturing equipment such as screens and filters.
   5. (E) Freeboard area—The air space in a batch-load cold cleaner that extends from the liquid surface to the top of the tank.

   6. (F) Freeboard height—

      1. 1. The distance from the top of the sol-

vent to the top of the tank for batch-loaded cold cleaners;

1. 2. The distance from the air-vapor inter-

face to the top of the tank for open-top vapor degreasers; or

1. 3. The distance from either the air-sol-

vent or air-vapor interface to the top of the tank for conveyorized degreasers.

1. (G) Freeboard ratio—The freeboard height divided by the smaller of either the inside length or inside width of the degreaser.

2. (H) Medical device—An instrument, apparatus, implement, machine, contrivance, implant, in vitro reagent or other similar article, including any component or accessory that meets one (1) of the following conditions:

   1. 1. It is intended for use in the diagnosis

of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease; 10 CSR 10-5

1. 2. It is intended to affect the structure or

any function of the body; or

1. 3. It is defined in the National

Formulary or the United States Pharmacopoeia, or any supplement to them.

1. (I) Soils—Includes, but is not limited to, unwanted grease, wax, grit, ash, dirt, oil, primers, paint, specialty coatings, adhesives, sealers, resins and deadeners.
2. (J) Definitions of certain terms specified in this rule, other than those specified in this rule section, may be found in 10 CSR 10- 6.020.

1. (3) General Provisions.

   1. (A) No person shall cause or allow solvent metal cleaning or degreasing operations—

      1. 1. Without adhering to operating proce-

dures as contained in this rule and to recommendations by the equipment manufacturer;

1. 2. Without the minimum operator and

supervisor training as specified in this rule; and

1. 3. Unless the equipment conforms to the

specifications listed in this rule.

1. (B) Equipment Specifications.

   1. 1. Cold cleaners.

      1. A. After September 30, 1998—

         1. (I) No owner or operator shall

allow the operation of any cold cleaner using a cold cleaning solvent with a vapor pressure greater than 2.0 millimeters of Mercury (mmHg) (0.038 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) unless the cold cleaner is used for carburetor cleaning;

1. (II) No supplier of cold cleaning

solvents shall sell or offer for sale any cold cleaning solvent with a vapor pressure greater than 2.0 mmHg (0.038 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) for use within the city of St. Louis and St. Charles, St. Louis, Jefferson and Franklin Counties, unless the cold cleaning solvent is used for carburetor cleaning;

1. (III) No owner or operator shall

allow the operation of any cold cleaner using a cold cleaning solvent for the purpose of carburetor cleaning with a vapor pressure greater than 7.0 mmHg (0.133 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)); and

1. (IV) No supplier of cold cleaning

solvents shall sell or offer for sale any cold cleaning solvent for the purpose of carburetor cleaning with a vapor pressure greater than 7.0 mmHg (0.133 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) for use within the city of St. Louis and St. Charles, St. Louis, Jefferson and Franklin Counties.

1. B. After April 1, 2001—

   1. (I) No owner or operator shall

operate or allow the operation of any cold cleaner using a cold cleaning solvent with a vapor pressure greater than 1.0 mmHg (0.019 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) unless the cold cleaner is used for carburetor cleaning;

1. (II) No supplier of cold cleaning

solvents shall sell or offer for sale any cold cleaning solvent with a vapor pressure greater than 1.0 mmHg (0.019 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) for use within the city of St. Louis and St. Charles, St. Louis, Jefferson and Franklin Counties, unless the cold cleaning solvent is used for carburetor cleaning;

1. (III) No owner or operator shall

allow the operation of any cold cleaner using a cold cleaning solvent for the purpose of carburetor cleaning with a vapor pressure greater than 5.0 mmHg (0.095 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)); and

1. (IV) No supplier of cold cleaning

solvents shall sell or offer for sale any cold cleaning solvent for the purpose of carburetor cleaning with a vapor pressure greater than 5.0 mmHg (0.095 psi) at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)) for use within the city of St. Louis and St. Charles, St. Louis, Jefferson and Franklin Counties.

1. C. Each cold cleaner shall have a

cover which will prevent the escape of solvent vapors from the solvent bath while in the closed position or an enclosed reservoir which will limit the escape of solvent vapors from the solvent bath whenever parts are not being processed in the cleaner.

1. D. Exemptions.

   1. (I) Sales of cold cleaning solvents

in quantities of five (5) gallons or less shall be exempt from the requirements of parts (3)(B)1.A.(II), (3)(B)1.A.(IV), (3)(B)1.B.(II) and (3)(B)1.B.(IV) of this rule.

1. (II) The cleaning of electronic com-

ponents shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule.

1. (III) Solvent cleaning operations

which meet the emission control requirements of 10 CSR 10-5.295, 10 CSR 10- 5.330, 10 CSR 10-5.340 or 10 CSR 10-5.442 shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule.

1. (IV) Cold cleaners using aqueous

solvents shall be exempt from the requirements of parts (3)(B)1.A.(I), (3)(B)1.A.(III), (3)(B)1.B.(I) and (3)(B)1.B.(III) of this rule.

1. (V) Cold cleaners using solvents

regulated under any federal National Emission Standard for Hazardous Air Pollutants shall be exempt from the requirements of parts (3)(B)1.A.(I), (3)(B)1.A.(III), (3)(B)1.B.(I) and (3)(B)1.B.(III) of this rule.

1. (VI) Any cold cleaner with a liquid

surface area of one (1) square foot or less or a maximum capacity of one (1) gallon or less shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule.

1. (VII) The cleaning of medical and

optical devices shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule. (VIII) Air-tight or airless cleaning systems shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule if the following requirements are met:

1. (a) The equipment is operated in

accordance with the manufacturer’s specifications and operated with a door or other pressure sealing apparatus that is in place during all cleaning and drying cycles;

1. (b) All waste solvents are stored

in properly identified and sealed containers, and managed in compliance with the Missouri Hazardous Waste Management Commission rules for reference codified at 10 CSR 25, as applicable. All associated pressure relief devices shall not allow liquid solvents to drain out;

1. (c) Spills during solvent transfer

shall be wiped up immediately and managed in compliance with the Missouri Hazardous Waste Commission rules for reference codified at 10 CSR 25, as applicable, and the used wipe rags shall be stored in closed containers; and

1. (d) A differential pressure gauge

shall be installed to indicate the sealed chamber pressure.

1. (IX) Janitorial and institutional

cleaning shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule.

1. (X) Spray gun cleaning. Each

owner or operator of a manufacturing and/or rework operation shall clean spray guns used in the application of (and not limited to) primers, paint, specialty coatings, adhesives, sealers, resins and deadeners utilizing one (1) or more of the following techniques:

1. (a) Enclosed system spray gun

cleaning shall consist of forcing solvent through the gun. Spray gun cleaning machines used to clean spray guns with the exception of remote open top spray gun cleaning machines shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule. Spray guns and nozzles only may be cleaned in remote closed top spray gun cleaning machines containing solvent-based materials capable of cleaning, provided the removable clean and spent solvent containers (not to exceed thirty (30) gallons in size) are kept tightly closed or covered at all times except when being accessed or maintained. All remote spray gun cleaning machines shall be operated within the manufacturers specifications. All remote closed top spray gun cleaning machines shall not be operated unless the cover is closed and shall be closed or covered when not in use;

1. (b) Nonatomized cleaning shall

be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule. Spray guns shall be cleaned by placing cleaning solvent in the pressure pot and forcing it through the gun with the atomizing cap in place. No atomizing air is to be used. The cleaning solvent from the spray gun shall be directed into (and not limited to) a pail, bucket, drum, or other waste container that is closed when not in use;

1. (c) Disassembled spray gun

cleaning shall be exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule. Spray guns shall be cleaned by disassembling and cleaning the components by hand in a cold cleaner, which shall remain closed at all times except when in use. Alternatively, the components shall be soaked in a cold cleaner, which shall remain closed during the soaking period and when not inserting or removing components;

1. (d) Atomizing cleaning shall be

exempt from the requirements of parts (3)(B)1.A.(I) and (3)(B)1.B.(I) of this rule. Spray guns shall be cleaned by forcing the cleaning solvent through the gun and directing the resulting atomized spray into a waste container that is fitted with a device designed to capture the atomized cleaning solvent emissions; and

1. (e) Cleaning of the nozzle tips of

automated spray equipment systems, except for robotic systems that can be programmed to spray into a closed container, shall be exempt from the requirements of part (3)(B)1.D.(X).

1. E. An owner or operator of a cold

cleaner may use an alternate method for reducing cold cleaning emissions if the owner or operator shows the level of emission control is equivalent to or greater than the requirements of parts (3)(B)1.A.(I), (3)(B)1.A.(III), (3)(B)1.B.(I) and (3)(B)1.B.(III) of this rule. This alternate method must be approved by the director.

1. F. When one (1) or more of the fol-

lowing conditions exist, the design of the cover shall be such that it can be easily operated with one (1) hand such that minimal disturbing of the solvent vapors in the tank occurs. (For covers larger than ten (10) square feet, this shall be accomplished by either mechanical assistance such as spring Specific to the St. Louis Metropolitan Area

loading or counter weighing or by power systems):

1. (I) The solvent vapor pressure is

greater than 0.3 psi measured at thirty-seven point eight degrees Celsius (37.8°C) (one hundred degrees Fahrenheit (100°F)), such as in mineral spirits;

1. (II) The solvent is agitated; or
2. (III) The solvent is heated.
3. G. Each cold cleaner shall have a

drainage facility which will be internal so that parts are enclosed under the cover while draining.

1. H. If an internal drainage facility can-

not fit into the cleaning system and the solvent vapor pressure is less than 0.6 psi measured at thirty-seven point eight degrees Celsius (37.8°C) (one hundred degrees Fahrenheit (100°F)), then the cold cleaner shall have an external drainage facility which provides for the solvent to drain back into the solvent bath.

1. I. Solvent sprays, if used, shall be a

solid fluid stream (not a fine, atomized or shower-type spray) and at a pressure which does not cause splashing above or beyond the freeboard.

1. J. A permanent conspicuous label

summarizing the operating procedures shall be affixed to the equipment.

1. K. Any cold cleaner which uses a sol-

vent that has a solvent vapor pressure greater than 0.6 psi measured at thirty-seven point eight degrees Celsius (37.8°C) (one hundred degrees Fahrenheit (100°F)) or heated above forty-eight point nine degrees Celsius (48.9°C) (one hundred twenty degrees Fahrenheit (120°F)) must use one (1) of the following control devices:

1. (I) A freeboard ratio of at least

0.75;

1. (II) Water cover (solvent must be

insoluble in and heavier than water); or

1. (III) Other control systems with a

mass balance demonstrated overall VOC emissions reduction efficiency greater than or equal to sixty-five percent (65%). These control systems must receive approval from the director prior to their use.

1. 2. Open-top vapor degreasers.

   1. A. Each open-top vapor degreaser

shall have a cover which will prevent the escape of solvent vapors from the degreaser while in the closed position and shall be designed to open and close easily with one (1) hand such that minimal disturbing of the solvent vapors in the tank occurs. For covers larger than ten (10) square feet, easy cover use shall be accomplished by either mechanical assistance, such as spring loading or counter weighing or by power systems.

1. B. Each open-top vapor degreaser

shall be equipped with a vapor level safety thermostat with a manual reset which shuts off the heating source when the vapor level rises above the cooling or condensing coil, or an equivalent safety device approved by the director.

1. C. Each open-top vapor degreaser

with an air/vapor interface over ten and threefourths (10 3/4) square feet shall be equipped with at least one (1) of the following control devices:

1. (I) A freeboard ratio of at least

0.75;

1. (II) A refrigerated chiller;
2. (III) An enclosed design (the cover

or door opens only when the dry part actually is entering or exiting the degreaser);

1. (IV) A carbon adsorption system

with ventilation of at least fifty (50) cubic feet per minute per square foot of air vapor area when the cover is open and exhausting less than twenty-five parts per million (25 ppm) of solvent by volume averaged over one (1) complete adsorption cycle as measured using the reference method specified at 10 CSR 10- 6.030(14)(A); or

1. (V) A control system with a mass

balance demonstrated overall VOC emissions reduction efficiency greater than or equal to sixty-five percent (65%) and prior approval by the director.

1. D. A permanent conspicuous label

summarizing the operating procedures shall be affixed to the equipment.

1. E. Exemption. Open-top vapor

degreasers using solvents regulated under any federal National Emission Standard for Hazardous Air Pollutants shall be exempt from the requirements of parts (3)(B)1.A.(I), (3)(B)1.A.(III), (3)(B)1.B.(I) and (3)(B)1.B.(III) of this rule.

1. 3. Conveyorized degreasers.

   1. A. Each conveyorized degreaser shall

have a drying tunnel or rotating (tumbling) basket or other means demonstrated to have equal to or better control which shall be used to prevent cleaned parts from carrying out solvent liquid or vapor.

1. B. Each conveyorized degreaser shall

have the following safety switches or equivalent safety devices approved by the director which operate if the machine malfunctions:

1. (I) A vapor level safety thermostat

with manual reset which shuts off the heating source when the vapor level rises just above the cooling or condensing coil; and

1. (II) A spray safety switch, which

shuts off the spray pump if the vapor level in the spray chamber drops four inches (4"), for conveyorized degreasers utilizing a spray chamber.

1. C. Entrances and exits shall silhouette

workloads so that the average clearance between parts and the edge of the degreaser opening is less than four inches (4") or less 10 CSR 10-5

than ten percent (10%) of the width of the opening.

1. D. Covers shall be provided for clos-

ing off the entrance and exit during hours when the degreaser is not being used.

1. E. A permanent, conspicuous label

summarizing the operating procedures shall be affixed to the equipment.

1. F. If the air/vapor interface is larger

than twenty-one and one-half (21 1/2) square feet, one (1) major control device shall be required. This device shall be one (1) of the following:

1. (I) A refrigerated chiller;
2. (II) Carbon adsorption system with

ventilation of at least fifty (50) cubic feet per minute per square foot of the total entrance and exit areas (when downtime covers are open) and exhausting less than twenty-five (25) ppm of solvent by volume averaged over one (1) complete adsorption cycle as measured using the reference method specified at 10 CSR 10-6.030(14)(A); or

1. (III) A control system with a mass

balance demonstrated overall VOC emissions reduction efficiency greater than or equal to sixty-five percent (65%) and prior approval by the director.

1. (C) Operating Procedures.

   1. 1. Cold cleaners.

      1. A. Cold cleaner covers shall be closed

whenever parts are not being handled in the cleaners or the solvent must drain into an enclosed reservoir except when performing maintenance or collecting solvent samples.

1. B. Cleaned parts shall be drained in

the freeboard area for at least fifteen (15) seconds or until dripping ceases, whichever is longer.

1. C. Whenever a cold cleaner fails to

perform within the operating parameters established for it by this rule, the unit shall be shut down immediately and shall remain shut down until the operator or trained service personnel are able to restore operation within the established parameters.

1. D. Solvent leaks shall be repaired

immediately or the degreaser shall be shut down until the leaks are repaired by the operator or trained service personnel.

1. E. Any waste material removed from

a cold cleaner shall be disposed of by one (1) of the following methods and in accordance with the Missouri Hazardous Waste Management Commission rules for reference codified at 10 CSR 10-25, as applicable:

1. (I) Reduction of the waste material

to less than twenty percent (20%) VOC solvent by distillation and proper disposal of the still bottom waste; or

1. (II) Stored in closed containers for

transfer to—

1. (a) A contract reclamation ser-

vice; or

1. (b) A disposal facility approved

by the director.

1. F. Waste solvent shall be stored in

covered containers only.

1. 2. Open-top vapor degreasers.

   1. A. The cover shall be kept closed at

all times except when processing workloads through the degreaser except when performing maintenance or collecting solvent samples.

1. B. Solvent carry-out shall be mini-

mized in the following ways:

1. (I) Parts shall be racked, if practi-

cal, to allow full drainage;

1. (II) Parts shall be moved in and out

of the degreaser at less than eleven feet (11') per minute;

1. (III) Workload shall remain in the

vapor zone at least thirty (30) seconds or until condensation ceases;

1. (IV) Pools of solvent shall be

removed from cleaned parts before removing parts from the degreaser freeboard area; and

1. (V) Cleaned parts shall be allowed

to dry within the degreaser freeboard area for at least fifteen (15) seconds or until visually dry, whichever is longer.

1. C. Porous or absorbent materials such

as cloth, leather, wood or rope shall not be degreased.

1. D. If workloads occupy more than

half of the degreaser’s open-top area, rate of entry and removal shall not exceed five feet (5') per minute.

1. E. Spray shall never extend above

vapor level.

1. F. Whenever an open-top vapor

degreaser fails to perform within the operating parameters established for it by this rule, the unit shall be shut down until the operator or trained service personnel are able to restore operation within the established parameters.

1. G. Solvent leaks shall be repaired

immediately or the degreaser shall be shut down until the leaks are repaired by the operator or trained service personnel.

1. H. Ventilation exhaust shall not

exceed sixty-five (65) cubic feet per minute per square foot of degreaser open area unless proof is submitted that it is necessary to meet Occupational Safety and Health Administration (OSHA) requirements. Fans shall not be used near the degreaser opening.

1. I. Water shall not be visually

detectable in solvent exiting the water separator.

1. J. Any waste material removed from

an open-top vapor degreaser shall be disposed of by one (1) of the following methods or equivalent and in accordance with the Missouri Hazardous Waste Management Commission rules for reference codified at 10 CSR 10-25, as applicable:

1. (I) Reduction of the waste material

to less than twenty percent (20%) VOC solvent by distillation and proper disposal of the still bottom waste; or

1. (II) Stored in closed containers for

transfer to—

1. (a) A contract reclamation ser-

vice; or

1. (b) A disposal facility approved

by the director.

1. K. Waste solvent shall be stored in

closed containers only.

1. 3. Conveyorized degreasers.

   1. A. Ventilation exhaust shall not

exceed sixty-five (65) cubic feet per minute per square foot of degreaser opening unless proof is submitted that it is necessary to meet OSHA requirements. Fans shall not be used near the degreaser opening.

1. B. Solvent carry-out shall be mini-

mized in the following ways:

1. (I) Parts shall be racked, if practi-

cal, to allow full drainage; and

1. (II) Vertical conveyor speed shall

be maintained at less than eleven feet (11') per minute.

1. C. Whenever a conveyorized degreas-

er fails to perform within the operating parameters established for it by this rule, the unit shall be shut down immediately and shall remain shut down until the operator or trained service personnel are able to restore operation within the established parameters.

1. D. Solvent leaks shall be repaired

immediately or the degreaser shall be shut down until the leaks are repaired by the operator or trained service personnel.

1. E. Water shall not be visually

detectable in solvent exiting the water separator.

1. F. Covers shall be placed over

entrances and exits immediately after conveyor and exhaust are shut down and removed just before they are started up.

1. G. Waste solvent shall be stored in

closed containers only.

1. H. Any waste material removed from

a conveyorized degreaser shall be disposed of by one (1) of the following methods or equivalent and in accordance with the Missouri Hazardous Waste Management Commission rules for reference codified at 10 CSR 10-25, as applicable:

1. (I) Reduction of the waste material

to less than twenty percent (20%) VOC solvent by distillation and proper disposal of the still bottom waste; or

1. (II) Stored in closed containers for

transfer to—

1. (a) A contract reclamation ser-

vice; or

1. (b) A disposal facility approved

by the director.

1. (D) Operator and Supervisor Training.

   1. 1. Only persons trained in at least the

operational and equipment requirements specified in this rule for their particular solvent metal cleaning process shall be permitted to operate the equipment.

1. 2. The supervisor of any person who

operates a solvent metal cleaning process shall receive equal or greater operational training than the operator.

1. 3. Refresher training shall be given to all

solvent metal cleaning equipment operators at least once each twelve (12) months.

1. 4. Training records shall be maintained

per subsections (4)(D) and (4)(E) of this rule.

1. 5. Operator and supervisor personnel

training and record keeping is exempt for spray gun cleaning operations that are regulated by 10 CSR 10-5.295 Control of Emissions From Aerospace Manufacturing and Rework. (4) Reporting and Record Keeping.

1. (A) The owner or operator of a solvent metal cleaning or degreasing operation shall keep monthly records of solvent types and amounts purchased and solvent consumed. These records shall include all types and amounts of solvents containing waste material transferred either to a contract reclamation service or to a disposal facility and all amounts distilled on the premises. The records also shall include maintenance and repair logs for both the degreaser and any associated control equipment. The director may require additional record keeping if necessary to adequately demonstrate compliance with this rule.

2. (B) After September 30, 1998, all persons subject to the requirements of parts (3)(B)1.A.(I), (3)(B)1.A.(III), (3)(B)1.B.(I), (3)(B)1.B.(III) shall maintain records which include for each purchase of cold cleaning solvent:

   1. 1. The name and address of the solvent

supplier;

1. 2. The date of purchase;
2. 3. The type of solvent; and
3. 4. The vapor pressure of the solvent in

mmHg at twenty degrees Celsius (20°C) (sixty-eight degrees Fahrenheit (68°F)).

1. (C) After September 30, 1998, all persons subject to the requirements of parts (3)(B)1.A.(II), (3)(B)1.A.(IV), (3)(B)1.B.(II), (3)(B)1.B.(IV) shall maintain records which include for each sale of cold cleaning solvent:

   1. 1. The name and address of the solvent

purchaser;

1. 2. The date of sale;
2. 3. The type of solvent;
3. 4. The unit volume of solvent;
4. 5. The total volume of solvent; and
5. 6. The vapor pressure of the solvent

measured in mmHg at twenty degrees Celsius Specific to the St. Louis Metropolitan Area

(20°C) (sixty-eight degrees Fahrenheit (68°F)).

1. (D) A record shall be kept of solvent metal cleaning training for each employee except per paragraph (3)(D)5.
2. (E) All records required under subsections (4)(A), (4)(B), (4)(C) and (4)(D) of this rule shall be retained for five (5) years and shall be made available to the director upon request.

1. (5) Test Methods. (Not applicable)

AUTHORITY: section 643.050, RSMo 2000.* Original rule filed Nov. 14, 1978, effective June 11, 1979. Amended: Filed Oct. 4, 1988, effective March 11, 1989. Emergency amendment filed Sept. 2, 1997, effective Jan. 1, 1998, expired June 30, 1998. Amended: Filed Sept. 22, 1997, effective May 30, 1998. Amended: Filed Sept. 13, 2001, effective May 30, 2002. *Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993, 1995.