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NYC 9/11 Public Portal Document

(b) Dates of project air sample collection, per workshift or day of area air samples, with appropriate reference to the regulated abatement work area to which the air samples apply.

(c) Sample locations sketch, identifying all project air sample locations, per workshift or day of area air samples. If identical locations are utilized for each workshift or day of area samples collected throughout a sub-phase of the asbestos project (HA, IIB or IIC), only one sketch is required for all workshift or day of area samples collected for that specific sub-phase of the asbestos project.

(d) The identifying information for each area air sample collected.

(e) Sampling time and duration for each area air sample collected.

(f) Flow rate primary or secondary calibration device identification number, method of flow rate primary or secondary device calibration and date of last calibration, per workshift or day of area air samples.

(g) Flow rate of sampling pumps with pre and post calibration listed for each area air sample collected.

(h) Chain of custody for each workshift or day of area air samples.

56-4.6 Test Methods. The same methodology for project air sampling and for analysis of the air samples shall be used at all phases of an asbestos project that require area air sampling and analysis, with the possible exception of clearance air sampling. Phase Contrast Microscopy (PCM) shall be the minimum acceptable method of analysis. In lieu of PCM clearance air sampling and analysis, the building/structure owner may elect to utilize TEM air sampling and analysis to meet clearance air sampling requirements. If Transmission Electron Microscopy (TEM) is the selected method of analysis, the clearance criteria and sampling protocols of the Asbestos Hazard Emergency Response Act (AHERA) shall be used. If PCM air sample analysis results exceed the satisfactory clearance air criteria under this Part, then TEM analysis of the entire set of clearance air samples may be used, provided that a standard accepted laboratory analysis method is used that shall report each air sample result in fibers per cubic centimeter, for appropriate correlation to the original unsatisfactory PCM clearance air sample results and the established background levels, and provided that a report is submitted to the Commissioner for the entire set of clearance air sample PCM and TEM laboratory analyses.

56-4.7 Air Sampling Equipment.

(a) Sampling Equipment. Area air sampling shall be performed using GFCI protected pumps with associated tubing, supports and airflow measuring, metering or recording devices.

(b) Duration, Flow Rate and Calibration. Area air samples, except for background and clearance air samples, shall be collected and air samplers run for each entire

12 NYCRR56 Subpart 4, Page 36

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