15 RCNY § 1-41 Air Sampling Schedule.
§ 1-41 Air Sampling Schedule.
(a) At a minimum, air sampling shall be conducted in accordance with the following schedule:
Abatement Activity Pre-Abatement During Abatement Post-Abatement
Equal to or Greater than 10,000 ft.2 or 10,000 linear ft. of ACM per work area PCM PCM TEM
Less than 10,000 ft.2 or 10,000 linear ft. of ACM PCM PCM PCM
Large Asbestos Projects
1. Full Containment 10 5 10
2. Glovebag inside Tent 5 a 5 a 5 a
3. Exterior Foam and Vertical Surfaces – 5 c 5 d
4. Interior Foam 10 5 c 10 d
Small Asbestos Projects
1. Full Containment 6 3 6
2. Glovebag inside Tent 3 b 3 b 3 b
3. Tent 3 b 3 b 3 b
4. Exterior Foam and Vertical Surfaces – 3 c 3 d
5. Interior Foam 6 3 c 6 d
Minor Projects
1. Glovebag inside Tent – 1 1 d
2. Tent – 1 1 d
3. Exterior Foam and Vertical Surfaces – – 1 d
4. Interior Foam – 1 1 d
a if more than three (3) tents then two (2) samples required per enclosure.
b if more than three (3) tents then one (1) sample required per enclosure.
c samples shall be taken within the work area(s).
d area sampling is required only if:
– visible emissions are detected during the project;
– during-abatement area sampling results exceeded 0.01 f/cc or the pre-abatement area sampling result(s) for interior projects where applicable; or
– the work area to be reoccupied is an interior space at a school, healthcare, or daycare facility.
Note: TEM is acceptable wherever PCM is required. TEM is required in schools in accordance with AHERA regulations.
(b) Pre-Abatement. Prior to commencement of abatement activities, the number of samples specified below shall be taken during normal occupancy activities and circumstances at the work site. Samples shall be taken at the following locations:
(1) For large full-containment and interior foam method asbestos projects, a minimum of five samples inside and five samples outside the proposed work area.
(2) For small full-containment and interior foam method asbestos projects, a minimum of three samples inside and three outside the proposed work area.
(3) For large and small asbestos projects employing the glovebag procedure within a tent, a minimum of five and three samples, respectively, or two samples per enclosure if more than three enclosures.
(4) For small asbestos projects solely employing tent procedure, a minimum of three samples inside each proposed work area, or two samples per enclosure if more than three enclosures.
(5) For all exterior projects (foam or vertical surface), no pre-abatement sampling is required.
(c) During abatement. Frequency and duration of the air sampling during abatement shall be representative of the actual conditions during the abatement. Area sampling shall be conducted daily and continuously during a work shift. If more than one daily work shift is required to accomplish the work, area sampling shall be performed on each work shift. Area sampling is not required on days when there are no abatement activities. For project air samples collected during the abatement, the period of time permitted between completion of air sample collection and receipt of results on the job site shall not exceed 48 hours. The following minimum schedule of samples shall be required during the work shift.
(1) For large asbestos projects employing full containment, area air sampling shall be performed at the following locations:
(i) Two area samples outside the asbestos project work area in uncontaminated areas of the building, remote from the decontamination facilities.
(A) Primary location selection shall be within 10 feet of isolation barriers.
(B) Where negative ventilation exhaust ducting runs through uncontaminated building areas, one area sample will be required in these areas to monitor any potential fiber release.
(C) Where exhaust tubes have been grouped together in banks of up to five (5) tubes, with each tube exhausting separately and the bank of tubes terminating together at the same controlled area, one area air sample shall be taken.
(ii) One area sample within five feet of the uncontaminated entrance to each worker decontamination and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable; and
(iii) One area sample within 5 feet of the unobstructed exhaust from a negative pressure ventilation system exhausting indoors but not within a duct.
(iv) One area sample outside, but within 25 feet of, the building or structure, if the entire building or structure is the work area.
(2) For large asbestos projects involving interior foam method, area air sampling shall be performed at the following sampling locations:
(i) One area sample taken outside the work area within 10 feet of isolation barriers.
(ii) One area sample taken within five feet of the uncontaminated entrance to each worker decontamination and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample within 5 feet of the unobstructed exhaust from a negative pressure ventilation system exhausting indoors but not within a duct, if applicable.
(iv) Three area samples inside the work area, which must be representative of the work area. The air samplers must be placed separate and apart from one another and must not be grouped together.
(v) One area sample where the negative ventilation exhaust ducting runs through uncontaminated building areas, if applicable.
(3) For large asbestos projects involving exterior foam method or removal of ACM from vertical surfaces, a minimum of five continuous area samples shall be taken concurrently with the abatement for each work area using the following minimum requirements:
(i) Four area samples inside the work area and remote from the decontamination systems, which must be representative of the work area. The air samplers must be placed separate and apart from one another and shall not be grouped together.
(ii) One area sample within five feet of the uncontaminated entrance to each worker and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample outside the work area within 25 feet of the building or structure, if the entire building or structure is the work area.
(iv) One area sample inside the building or structure at the egress point to the work area, if applicable.
(4) For large asbestos projects employing the glovebag procedure within a tent, a minimum of five continuous air samples shall be taken concurrently with the abatement for each work area, unless there are more than three enclosures, in which case two area samples per enclosure are required.
(i) Four area samples taken outside the work area within ten feet of tent enclosure(s).
(ii) One area sample taken within five feet of the uncontaminated entrance to each worker and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample within five feet of the unobstructed exhaust from a negative pressure ventilation system exhausting indoors, but not within a duct, if applicable.
(iv) One area sample where negative ventilation exhaust ducting runs through uncontaminated building areas, if applicable.
(5) For small asbestos projects employing full containment, a minimum of three continuous area samples shall be taken concurrently with the abatement for each work area at the following locations:
(i) Two area samples taken outside the work area within ten feet of the isolation barriers.
(ii) One area sample within five feet of the uncontaminated entrance to each worker or waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample within five feet of the unobstructed exhaust from a negative pressure ventilation system exhausting indoors, but not within a duct, if applicable.
(iv) One area sample where negative ventilation exhaust ducting runs through an uncontaminated building area, if applicable.
(6) For small asbestos projects involving the use of foam method on the exterior of a building or the removal of ACM from exterior surfaces, a minimum of three continuous area samples shall be taken concurrently with the abatement for each work area at the following locations:
(i) Two area samples inside the work area and remote from the decontamination systems. Air samples inside the work area must be representative of the work area. The air samplers must be placed separate and apart from one another and shall not be grouped together.
(ii) One area sample within five feet of the uncontaminated entrance to each worker and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample inside the building or structure at the egress point to the work area, if applicable.
(7) For small asbestos projects using the tent procedure (with or without the use of glovebags), a minimum of three area samples shall be taken concurrently with the abatement for each work area unless there are more than two enclosures, in which case one sample per enclosure is required.
(i) Two area samples taken outside of the work area within ten feet of the tent.
(ii) One area sample within five feet of the uncontaminated entrance to each worker and waste decontamination system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample within five feet of the unobstructed exhaust from a negative pressure ventilation system exhausting indoors, but not within a duct, if applicable.
(iv) One area sample where negative ventilation exhaust ducting runs through uncontaminated building areas, if applicable.
(8) For small asbestos projects employing interior foam procedures, a minimum of three continuous area samples shall be taken concurrently with the abatement for each work area at the following locations:
(i) One area sample taken inside the work area.
(ii) One area sample taken within five feet of the uncontaminated entrance to each worker and waste decontamination enclosure system, or parallel worker and waste decontamination system, if applicable.
(iii) One area sample taken outside the work area within ten feet of the isolation barriers.
(iv) One area sample where negative ventilation exhaust ducting runs through uncontaminated building areas, if applicable.
(9) For minor projects employing glovebag or tent procedures, one area sample shall be taken outside the glovebag or tent, not more than five feet from the uncontaminated entrance to the glovebag or tent.
(d) Post-abatement. Post-abatement clearance air monitoring shall include at a minimum the number of area samples specified below, to be taken for each homogeneous work area.
(1) For small asbestos projects:
(i) involving full containment or interior foam method (if required by 15 RCNY § 1-41(a)), three area samples inside and three outside the work area;
(ii) involving tent procedure (with or without the use of glovebags), three area samples inside each work area or one area sample inside each tent if there are more than three tents;
(iii) involving exterior foam method or removal from vertical surfaces, three area samples inside the restricted area beneath and/or immediately adjacent to the work area, only if visible emissions were detected during the project, or abatement area samples exceeded 0.01 f/cc.
(2) For large asbestos projects:
(i) a minimum of five area samples inside and five outside the work area, for projects involving full containment or interior foam method (if required by 15 RCNY § 1-41(a)). In addition to the five sample minimum, one representative area sample must be collected both inside and outside the work area for every 5,000 square feet above 25,000 square feet of floor space when ACM has been abated.
(ii) a minimum of five area samples inside each tent enclosure where glovebag procedures are being used, or two area samples inside each tent where glovebag procedures are being used if there are more than three tents;
(iii) involving exterior foam method or removal from vertical surfaces, five area samples inside the restricted area beneath and/or immediately adjacent to the work area, only if visible emissions were detected during the project, or abatement area samples exceeded 0.01 f/cc.
(3) When TEM analysis is employed a minimum of 5 samples from outside the work area shall also be collected.
(4) For minor projects post-abatement clearance air monitoring is not required, unless visible emissions were detected outside the work area and/or levels exceeded 0.01 f/cc during abatement, or the project was conducted inside a school, daycare, or healthcare institution. In such cases, one area sample shall be taken.
(Amended City Record 12/7/2018, eff. 1/6/2019; amended City Record 4/28/2022, eff. 5/28/2022)