Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part III - Air › Chapter 21 - Control of Emission of Organic Compounds › Subchapter C - Solvent Degreasers › Section III-2125 - Solvent Degreasers

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				  Open Top Vapor Degreasers
1. No person shall
				  operate or maintain a system utilizing a volatile organic compound for the open
				  top vapor cleaning of objects without a cover that can be opened and closed
				  easily without disturbing the vapor zone.
2. No person shall operate or maintain a
				  system using a volatile organic compound for the open top vapor cleaning of
				  objects without complying with the following operating procedures.
a. The cover shall be closed at all times
				  except when processing work loads through the degreaser.
b. Parts shall be positioned so that maximum
				  drainage is obtained.
c. Parts
				  shall be moved in and out of the degreaser at less than 11 feet per minute (3.3
				  meters per minute).
d. The work
				  load shall be degreased in the vapor zone at least 30 seconds or until
				  condensation ceases.
e. Any pools
				  of solvent on the cleaned parts shall be removed by tipping the part before
				  withdrawing the part.
f. Parts
				  shall be allowed to dry within the degreaser for at least 15 seconds or until
				  visually dry.
g. Porous or
				  absorbent materials such as cloth, leather, wood or rope shall not be
				  degreased.
h. Work loads shall not
				  occupy more than half of the degreaser open top area.
i. Solvent shall not be sprayed above the
				  vapor level.
j. Solvent leaks shall
				  be repaired immediately or the degreaser shall be shut down.
k. Waste solvent shall not be disposed of or
				  transferred to another party such that greater than 20 percent of the waste (by
				  weight) will evaporate into the atmosphere.
l. Exhaust ventilation shall not exceed 65
				  cubic feet per minute (CFM) per square foot (ft2)
				  (20 cubic meters per minute per square meter) of degreaser open area, unless
				  necessary to meet OSHA requirements or unless a carbon adsorption system is
				  installed as a major control device. Ventilation fans shall not be used near
				  the degreaser opening.
m. Water
				  shall not be visibly detectable in solvent exiting the water
				  separator.
3. No person
				  shall operate or maintain a system utilizing a volatile organic compound for
				  the open top vapor cleaning of objects without the following safety switches:
a. the following control devices which will
				  automatically shut off sump heat:
i. a
				  condenser flow sensor and thermostat which will detect if the condenser coolant
				  is not circulating or if the condenser coolant temperature exceeds the solvent
				  manufacturer's recommendations;
ii.
				  a solvent level sensor which will detect if the solvent level drops below
				  acceptable design limits;
iii. a
				  vapor level sensor which will detect if the vapor level rises above acceptable
				  design limits;
b. a
				  spray safety switch which will shut off the spray pump if the vapor level drops
				  more than 4 inches (10 cm) to prevent spraying above the vapor level;
c. one of the following controls:
i. the degreaser shall have a freeboard that
				  provides a ratio (the distance from the top of the vapor level to the top edge
				  of the degreasing tank divided by the degreaser width) equal to or greater than
				  0.75, and, if the degreaser opening is greater than 10
				  ft2 (1 m2), a powered
				  cover;
ii. the degreaser shall have
				  a properly sized refrigerated chiller capable of achieving an 85 percent
				  reduction in solvent emissions;
iii. the degreaser shall be of an enclosed
				  design where the cover or door opens only when the dry part is actually
				  entering or exiting the degreaser;
iv. the degreaser shall be equipped with a
				  carbon adsorption system with ventilation equal to or greater than 50
				  cfm/ft2 (15 m3/min per
				  m2) of air/vapor area (when the cover is open) and
				  exhausting less than 25 ppm of solvent by volume averaged over one complete
				  adsorption cycle;
d. a
				  permanent conspicuous label summarizing the operating procedures.