Asbestos / Lead Abatement Containment Take-Off
Containment poly sheeting, the negative-air machine count for the required air changes.
Example
You enter
- Containment length (ft) 20
- Containment width (ft) 15
- Containment height (ft) 9
- Air changes per hour 4
- One negative-air machine airflow (cfm) 1500
- Regulated debris to bag (cy) 3
- Floor layers 2
- Wall layers 1
You get
- Poly sheeting (incl. 10% laps) 1353 ft^2
- Required exhaust airflow 180 cfm
- Negative-air machines 1
- Regulated-waste bags 27
Checked against published worked examples from: EPA NESHAP 40 CFR 61 M / OSHA 1926.1101.
Details, formula, and sources
ScopeContainment poly sheeting, the negative-air machine count for the required air changes, and the regulated-waste bag count from the room dimensions.
Formula or tablepoly = (floor_sf x floor_layers + wall_sf x wall_layers) x 1.10; req_cfm = volume x ach / 60; nam_count = ceil(req_cfm / nam_cfm); waste_bags = ceil(debris_cy x 27 / (4.4 x 0.7)).
Source and editionEPA NESHAP 40 CFR 61 Subpart M (asbestos), EPA RRP 40 CFR 745 (lead), and OSHA 1926.1101 / 1926.62 by name; a containment take-off.
Free accessEPA NESHAP / RRP and OSHA 1926 are free federal regulations (epa.gov, osha.gov). The take-off geometry is public.
What governsEstimate. AHJ and licensed professional govern.
API field namesroom_len_ft, room_wid_ft, room_ht_ft, ach_target, nam_cfm, debris_cy, floor_layers, wall_layers, poly_sf, req_cfm, nam_count, waste_bags
- Defaults 4 ACH, 1,500 cfm per HEPA machine, a 33-gal bag (4.4 ft^3 brim-full) filled to 70%, 2 floor / 1 wall poly layers, 10% lapsasbestos abatement practice