§ 1-42 Monitoring Requirements.
RCNY § 1-42
Monitoring requirements and procedures for other than post-abatement clearance air monitoring are as follows: (a) The sampling zone for air samples shall be representative of the building occupants' breathing zone. However, at no time shall the sampling cassette be placed less than 4 feet from the ground. Air samplers shall be placed so that they are not influenced by unusual air circulation patterns or by the configuration of the space or by each other. Air sampling cassettes shall be mounted upon commercially-available aluminum tripods and shall not be placed within two feet of walls or obstructions such as the corners of rooms or furniture.
(b)If possible, ambient samplers should be placed about 6 feet above the ground surface in reasonable proximity to the building and away from obstructions and drafts that may unduly affect airflow. For outdoor samples, if access to electricity and concerns about security dictate a rooftop site, locations near vents and other structures on the roof which would unduly affect airflow shall be avoided.
(c)Samples shall have a chain of custody record. The project air sampling log required pursuant to 15 RCNY § 1-37(f) does not satisfy the chain of custody requirement.
(d)In accordance with the above criteria, area samples (see 15 RCNY § 1-41) shall conform to the following schedule: Area Samples for Analysis byMinimum Volume Flow Rate PCM 25 mm5605 to 15 liters/min. TEM 25 mm5601 to 10 liters/min. TEM 37 mm1,2501 to 10 liters/min.
(e)For small projects including tent procedures, sampling shall start with the installation of the containment and shall run concurrently with the procedure. (Amended City Record 8/21/2019, eff. 9/20/2019)
