Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 20 - ENVIRONMENT
Chapter 20-7 - AIR QUALITY - VOLATILE ORGANIC COMPOUNDS AND HAZARDOUS AIR POLLUTANTS
Rule 20-767 - SOLVENT CLEANING - AIRLESS AND AIR-TIGHT CLEANING

D.C. Mun. Regs. tit. 20, r. 20-767

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Current through Register 71, No. 45, November 7, 2024
Rule 20-767 - SOLVENT CLEANING - AIRLESS AND AIR-TIGHT CLEANING
767.1

This section applies to airless cleaning machines and air-tight cleaning machines that process metal parts.

767.2

The operator of each machine shall maintain a log of solvent additions and deletions for each machine that includes the weight of solvent contained in activated carbon or other absorbent materials used to control emissions from the cleaning machine;

767.3

The operator of each machine shall demonstrate that the emissions from each machine, on a three (3) month rolling average, are equal to or less than the allowable limit determined by the use of Table I in this section or the following equation if the volume of the cleaning machine exceeds two and ninety-five one hundredths cubic meters (2.95 m.3):

EL = 330 (vol.)0.6

where:

EL = the three-month rolling average monthly emission limit (kilograms/month);

vol. = the cleaning capacity of machine (cubic meters);

Table I. Emission Limits for Cleaning Machines without a Solvent/Air Interface

Cleaning Capacity

(m.3)

3-Month rolling average monthly emission limit (kilograms/month)

Cleaning Capacity

(m.3)

3-Month rolling average monthly emission limit (kilograms/month)

Cleaning Capacity

(m.3)

3-Month rolling average monthly emission limit (kilograms/month)

0.00

0

1.00

330

2.00

500

0.05

55

1.05

340

2.05

508

0.10

83

1.10

349

2.10

515

0.15

106

1.15

359

2.15

522

0.20

126

1.20

368

2.20

530

0.25

144

1.25

377

2.25

537

0.30

160

1.30

386

2.30

544

0.35

176

1.35

395

2.35

551

0.40

190

1.40

404

2.40

558

0.45

204

1.45

412

2.45

565

0.50

218

1.50

421

2.50

572

0.55

231

1.55

429

2.55

579

0.60

243

1.60

438

2.60

585

0.65

255

1.65

446

2.65

592

0.70

266

1.70

454

2.70

599

0.75

278

1.75

462

2.75

605

0.80

289

1.80

470

2.80

612

0.85

299

1.85

477

2.85

619

0.90

310

1.90

485

2.90

625

0.95

320

1.95

493

2.95

632

767.4

The operator of each machine shall operate the machine in conformance with the manufacturer's instructions and good air pollution control practices;

767.5

The operator of each machine equipped with a solvent adsorber shall measure and record the concentration of solvent in the exhaust of the carbon adsorber weekly with a colorimetric detector tube designed to measure a concentration of one hundred parts per million (100 ppm) by volume of solvent to air at an accuracy of plus or minus twenty-five parts per million (25 ppm) by volume. This test shall be conducted while the solvent cleaning machine is in the working mode and is venting to the adsorber;

767.6

The operator of each machine equipped with a solvent adsorber shall maintain and operate the machine and adsorber system so that emissions from the adsorber exhaust do not exceed one hundred parts per million (100 ppm) by volume, measured while the solvent cleaning machine is in the working mode and is venting to the adsorber;

767.7

The machine shall be equipped with a permanent, conspicuous label summarizing the operating requirements in § 767.8;

767.8

Airless cleaning machines and air-tight cleaning machines shall be operated in accordance with the following procedures:

(a) Waste solvent, still bottoms, and sump bottoms 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) Parts shall be oriented so that the solvent drains freely from the parts:
(1) Cleaned parts shall be drained at least fifteen (15) seconds or until dripping ceases, whichever is longer; and
(2) Parts having cavities or blind holes shall be tipped or rotated while the part is draining;
(c) Parts baskets or parts shall not be removed from the in-line vapor cleaning machine until dripping has ceased;
(d) Sponges, fabric, wood, leather, paper products and other absorbent materials shall not be cleaned in the airless cleaning machines and air-tight cleaning machines;
(e) Spills during solvent transfer and use of the airless cleaning machines and air-tight cleaning machines shall be cleaned up immediately, and the wipe rags or other absorbent materials shall be immediately stored in covered containers for disposal or recycling;
(f) Work area fans shall be located and positioned so that they do not blow across the airless cleaning machine and air-tight cleaning machine;
(g) Spraying operations shall be done in the vapor zone or within a section of the machine that is not exposed to the ambient air; and
(h) Solvents shall be transferred using threaded or other leak proof couplings and the end of the pipe in the solvent sump shall be located beneath the liquid solvent surface when solvent is added to or drained from the airless cleaning machine and air-tight cleaning machine.

D.C. Mun. Regs. tit. 20, r. 20-767

Notice of Final Rulemaking published at 58 DCR 11286, 11381 (December 30, 2011)
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.