COLUSA COUNTY AIR POLLUTION CONTROL DISTRICT
REGULATION II - PROHIBITIONS
RULE 2.25 - ORGANIC SOLVENT DEGREASING OPERATIONS
(amended 1/23/96)
a. PURPOSE
To control volatile organic compound emissions from solvent cleaning and degreasing operations to levels consistent
with reasonably available control technology (RACT).
b. APPLICABILITY
This rule shall apply to all volatile organic compound solvent cleaning and degreasing operations.
c. EXEMPTIONS
d. DEFINITIONS
The top of the solvent-vapor layer, and the air touching this layer.
B. Vapor Solvent Cleaner: The Surface area of the top of the solvent vapor-air interface.
C. Conveyorized Solvent Cleaner:
B. Batch-loaded Vapor Solvent Cleaner: The vertical distance from the top of the solvent vapor-air interface to the top of the solvent cleaner.
C. Conveyorized Solvent Cleaner:
B. The combined plane geometric surface area(s) displaced by the submerged workload, if no basket is used.
e. STANDARDS
A. All cleaners shall be equipped with the following:
B. Remote Reservoir Cold Cleaners shall be equipped with all of the following:
C. Cold Cleaners:
a. Cold cleaners using only low volatility solvents which are not agitated, shall operate with a freeboard height not less than 6 inches.
b. Cold cleaners (including remote reservoir cold cleaners) using solvents which are agitated, heated above 50C (120F) or volatile solvents, shall operate with a freeboard ratio equal to or greater than 0.75.
c. A water cover may be used as an acceptable control method to meet the freeboard requirements, if the solvent is insoluble in water and has a specific gravity greater than 1.
D. Batch-loaded Vapor Cleaners shall be equipped with the following:
E. Conveyorized Cold Cleaners shall be equipped with the following:
F. Conveyorized Vapor Cleaners shall be equipped with the following:
A. All Cleaners
a. A commercial waste solvent reclamation service licensed by the State of California.
b. At a facility that is federally or state licensed to treat, store or dispose of such waste.
c. Recycling in conformance with Section 25143.2 of the California Health and Safety Code.
A. Rack workload for drainage.
B. Limit the vertical speed of a powered hoist, if one is used, to not more than 3.3 meters per minute (11 ft/min).
C. Retain the workload below the air-vapor interface until condensation ceases, as applicable.
D. For manual operation, from the solvent cleaner until visually dry and all dripping ceases. This requirement does not apply to emulsion cleaner workload that is rinsed with water within the cleaner immediately after cleaning.
B. Batch-loaded and Conveyorized Vapor Cleaners. In addition to the requirements in Section e.3.A., the operating requirements below shall apply:
a. When starting the cleaner, the cooling system shall be turned on before, or simultaneously with, the sump heater.
b. When shutting down the cleaner, the sump heater shall be turned off before, or simultaneously with, the cooling system.
A. Initial Boiling Point of Solvent. The initial boiling point of the solvent shall be determined by ASTM D1078-93.
B. Capture Efficiency. Capture efficiency shall be determined by the appropriate method described in the Code of Federal Regulations, 40 CFR 52.741, Appendix B.
C. Control Efficiency. EPA Method 25 shall be used to determine control efficiency, in combination with the appropriate method in the reference mentioned in 6.b.
D. Volumetric Flowrate. Volumetric Flowrate shall be determined by EPA Methods 2, 2A, 2C and 2D.
E. Exempt Compounds. Determination of exempt compounds, shall be performed in accordance with ASTM D4457-85 (Solvents and coatings) and be consistent with the provisions set forth in the Code of Federal Regulations (FR, Vol. 56, No. 52, March 18, 1991).
F. Volatile Organic Compounds. For the purposes of this determination, the content of VOCs in solvents shall
be determined by the appropriate procedures contained in EPA Method 24.
A. Solvent Records. The following records shall be retained for the previous 24 month period and be available at the time of a district inspection: