Section 20-764. SOLVENT CLEANING – COLD CLEANING

 

764.1This section applies to all cold cleaning machines that process metal parts and contain more than one liter (1 L) of VOC. The provisions of this section shall not apply if the owner and operator of the cold cleaning machine demonstrates, and the District approves in writing, that compliance with this section will result in unsafe operating conditions.  

 

764.2 Immersion cold cleaning machines shall have a freeboard ratio of seventy-five one hundredths (0.75) or greater, unless the machines are equipped with covers that are kept closed except when parts are being placed into or are being removed from the machine.

 

764.3 Immersion cold cleaning machines and remote reservoir cold cleaning machines shall:

 

(a) Have a permanent, conspicuous label summarizing the operating requirements in § 764.4; and

 

(b) Be equipped with a cover that shall be closed at all times except during cleaning of parts or the addition or removal of solvent. For remote reservoir cold cleaning machines that drain directly into the solvent storage reservoir, a perforated drain with a diameter of not more than six inches (6 in.) shall constitute an acceptable cover.

 

764.4 Cold cleaning machines shall be operated in accordance with the following procedures:

 

(a) Waste solvent shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but does not allow liquid solvent to drain from the container;

 

(b) Cleaned parts shall be drained at least fifteen (15) seconds or until dripping ceases, whichever is longer;

 

(1) Parts having cavities or blind holes shall be tipped or rotated while the part is draining; and

 

(2) During the draining, tipping or rotating, the parts shall be positioned so that solvent drains directly back to the cold cleaning machine;

 

(c) Flushing of parts using a flexible hose or other flushing device shall be performed only within the freeboard area of the cold cleaning machine. The solvent spray shall be a solid fluid stream, not an atomized or shower spray, at a pressure that does not exceed ten pounds (10 lb.) per square inch gauge (psig);

 

(d) The owner or operator shall ensure that when the cover is open, the cold cleaning machine is not exposed to drafts greater than forty meters (40 m.) per minute (one hundred thirty-two feet (132 ft.) per minute), as measured between one meter (1 m.) and two meters (2 m.) (three and three tenths feet (3.3 ft.) and six and six tenths feet (6.6 ft.) upwind, and at the same elevation as the tank lip;

 

(e) Sponges, fabric, wood, leather, paper products, and other absorbent materials shall not be cleaned in the cold cleaning machine;

 

(f) When a pump-agitated solvent bath is used, the agitator shall be operated to produce a rolling motion of the solvent with no observable splashing of the solvent against the tank walls or the parts being cleaned. Air-agitated solvent baths may not be used;

 

(g) Spills during solvent transfer and use of the cold cleaning machine shall be cleaned up immediately, and the wipe rags or other absorbent materials shall be immediately stored in covered containers for disposal or recycling;

 

(h) Work area fans shall be located and positioned so that they do not blow across the opening of the degreaser unit; and

 

(i) The owner or operator shall ensure that the solvent level does not exceed the fill line.

 

764.5 Any solvent for use in a cold cleaning machine shall not have a vapor pressure of one millimeter of mercury (1.0 mm. Hg) or greater, measured at twenty degrees Celsius (20o C) or sixty-eight degrees Fahrenheit (68° F) containing VOCs; 

764.6 A person who sells or offers for sale any solvent containing VOCs for use in a cold cleaning machine shall provide the following written information to the purchaser:

 

(a) The name and address of the solvent supplier;

 

(b) The type of solvent, including the product or vendor identification number; and

 

(c) The vapor pressure of the solvent, measured in millimeters of mercury (mm Hg) at twenty degrees Celsius (20o C) or sixty-eight degrees Fahrenheit (68° F); and

 

764.7 A person who operates a cold cleaning machine shall maintain for not less than two (2) years and shall provide to the Department, on request, the information specified in § 764.6. An invoice, bill of sale, certificate that corresponds to a number of sales, Material Safety Data Sheet (MSDS), or other appropriate documentation acceptable to the Department may be used to comply with this section.

 

authority

The Director of the District Department of the Environment (DDOE or Department), pursuant to the authority set forth in sections 5 and 6(b) of the District of Columbia Air Pollution Control Act of 1984, as amended, effective March 15, 1985 (D.C. Law 5-165 (DCAPC); D.C. Official Code §§ 8-101.05 and 8-101.06(b)(2008 Repl.)), section 107(4) of the District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code § 8-151.07(4)(2008 Repl.)), Mayor's Order 98-44, dated April 10, 1998, and Mayor’s Order 2006-61, dated June 14, 2006.

source

Notice of Final Rulemaking published at 58 DCR 11286, 11372 (December 30, 2011).