---
kind: "section"
citation: "40 C.F.R. § 61.152"
title: "40"
number: "61.152"
heading: "Air-cleaning."
url: "https://uscodex.org/cfr/40/61.152"
---

# §61.152. Air-cleaning.

- (a) The owner or operator who uses air cleaning, as specified in §§ [61.142(a)](/cfr/40/61.142.md?p=a), [61.144(b)(2)](/cfr/40/61.144.md?p=b-2), [61.145(c)(3)(i)(B)(1)](/cfr/40/61.145.md?p=c-3-i-B-1), [61.145(c)(4)(ii)](/cfr/40/61.145.md?p=c-4-ii), [61.145(c)(11)(i)](/cfr/40/61.145.md?p=c-11-i), [61.146(b)(2)](/cfr/40/61.146.md?p=b-2), [61.147(b)(2)](/cfr/40/61.147.md?p=b-2), [61.149(b)](/cfr/40/61.149.md?p=b), [61.149(c)(1)(ii)](/cfr/40/61.149.md?p=c-1-ii), [61.150(a)(1)(ii)](/cfr/40/61.150.md?p=a-1-ii), [61.150(a)(2)(ii)](/cfr/40/61.150.md?p=a-2-ii), and [61.155(e)](/cfr/40/61.155.md?p=e) shall:
  - (1) Use fabric filter collection devices, except as noted in [paragraph (b)](#b) of this section, doing all of the following:
    - (i) Ensuring that the airflow permeability, as determined by ASTM Method D737-75, does not exceed 9 m 3/min/m 2 (30 ft 3/min/ft 2) for woven fabrics or 11 3/min/m 2(35 ft 3/min/ft 2) for felted fabrics, except that 12 m 3/min/m 2 (40 ft 3min/ft 2) for woven and 14 m 3/min/m 2 (45 ft 3min/ft 2) for felted fabrics is allowed for filtering air from asbestos ore dryers; and
    - (ii) Ensuring that felted fabric weighs at least 475 grams per square meter (14 ounces per square yard) and is at least 1.6 millimeters (one-sixteenth inch) thick throughout; and
    - (iii) **Avoiding the use of synthetic fabrics that contain fill yarn other than that which is spun.**
  - (2) **Properly install, use, operate, and maintain all air-cleaning equipment authorized by this section.** Bypass devices may be used only during upset or emergency conditions and then only for so long as it takes to shut down the operation generating the particulate asbestos material.
  - (3) For fabric filter collection devices installed after January 10, 1989, provide for easy inspection for faulty bags.
- (b) **There are the following exceptions to paragraph (a)(1)—**
  - (1) After January 10, 1989, if the use of fabric creates a fire or explosion hazard, or the Administrator determines that a fabric filter is not feasible, the Administrator may authorize as a substitute the use of wet collectors designed to operate with a unit contacting energy of at least 9.95 kilopascals (40 inches water gage pressure).
  - (2) Use a HEPA filter that is certified to be at least 99.97 percent efficient for 0.3 micron particles.
  - (3) The Administrator may authorize the use of filtering equipment other than described in paragraphs [(a)(1)](#a-1) and [(b)(1)](#b-1) and [(2)](#b-2) of this section if the owner or operator demonstrates to the Administrator's satisfaction that it is equivalent to the described equipment in filtering particulate asbestos material.

## Notes

### Amendments

[49 FR 13661, Apr. 5, 1984; 49 FR 25453, June 21, 1984, as amended at 51 FR 8199, Mar. 10, 1986. Redesignated and amended at 55 FR 48430, Nov. 20, 1990]

### Authority

Authority: 42 U.S.C. 7401, 7412, 7414, 7416, 7601.

### Source

Source: 49 FR 13661, Apr. 5, 1984, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 38 FR 8826, Apr. 6, 1973, unless otherwise noted.

### Amendments

[49 FR 13661, Apr. 5, 1984; 49 FR 25453, June 21, 1984, as amended at 51 FR 8199, Mar. 10, 1986. Redesignated and amended at 55 FR 48430, Nov. 20, 1990]