Sec. 56-4.12. Unsatisfactory clearance air sample results

If the regulated abatement work area clearance air sampling results are unacceptable, the following requirements apply:

(a) If the results of the inside work area group of air samples are unsatisfactory, recleaning of regulated abatement work area surfaces using wet methods, followed by another drying time period and then collection and analysis of an additional full set (both inside and outside work area samples) of clearance air samples is required (see section 56-9.2 of this Part).

(b) If only the results of the outside work area group of air samples is unsatisfactory, clean-up of surfaces outside of the regulated abatement work area using HEPA-vacuums and wet-cleaning methods shall be performed prior to collection and analysis of an additional group of outside work area clearance air samples as required by section 56-9.2 of this Part.

(c) This recleaning/clean-up and sampling process shall be repeated until satisfactory clearance air sampling results have been achieved for all asbestos project non-exempt regulated abatement work areas throughout the entire work site.

Table 2

ASBESTOS PROJECT AIR SAMPLING REQUIREMENTS

Air Sampling Requirements by Asbestos Project & Regulated Abatement Work Area Size	Phase I B Background Air Sampling	Phase II A Work Area Preparation Air Sampling	Phase II B Asbestos Handling Air Sampling	Phase II C Final Cleaning & Clearance Air Sampling
LARGE ASBESTOS PROJECT OR LARGE SIZE REGULATED ABATEMENT WORK AREA	Required	Required	Required	Required
Minimum Samples	5 Inside Regulated	1 per decontamination extrance/exit		5 Inside Regulated
Required	Abatement Work	1 per negative air exhaust		Abatement Work
	Area & 5 Outside	or per bank of 5 exhausts		Area & 5 Outside
	Regulated	2 at critical barriers		Regulated
	Abatement Work	1 outside the		Abatement Work
	Area in Building/Structure	building/structure		Area in Building/Structure
SMALL ASBESTOS PROJECT OR SMALL SIZE REGULATED ABATEMENT WORK AREA	Required	Not Required		Required
Minimum Samples Required	3 Inside Regulated Abatement Work Area & 3 Outside Regulated Abatement Work Area in Building/Structure	0		3 Inside Regulated Abatement Work Area & 3 Outside Regulated Abatement Work Area in Building/Structure
MINOR ASBESTOS PROJECT OR MINOR SIZE REGULATED ABATEMENT WORK AREA	Not Required	Not Required		Required3,4
Minimum Samples Required	0	0		1 Inside Regulated Abatement Work Area & 1 Outside Regulated Abatement Work Area

Notes:

For sample location and total number required, see Subparts 56-6 through 56-9 of this Part.

1 sample outside the building/structure if entire building/structure is regulated abatement work area.

Required on glove bag failure or loss of integrity, or tent failure or loss of integrity.

Required for an Incidental Disturbance Project or if minor size regulated abatement work area is part of small or large asbestos project.

Required for all OSHA Class I and Class II Friable ACM asbestos projects.

During IIC final cleaning stage, air sampling as per Phase IIB is required.

One additional inside sample shall be required for every 5,000 sq. ft. above 25,000 sq. ft. of floor space within the regulated abatement work area.