EPA work plan review, 133-135 and 21-23 buildings, August 2005

NYC 9/11 Public Portal Document

Part II- Environmental Community Monitoring Plan 133-135 Greenwich & 21-23 Thames Streets Airtek Project 05-0701 — Rev I August 11, 2005

The following QA/QC documentation must be met for all samples:

• Sample documentation (location, date and time of collection, etc.); • Chain of Custody; • Initial and continuing calibration; • Sampling design approach; • Determination and documentation of detection limits; • Analyte(s) identification; • Analyte(s) quantification; • QC and Performance Evaluation samples.

3.1 Chain of Custody

All samples must be transferred without exception to the appropriate analysis station under chain of custody. Standard Chain of Custody must be used for this purpose.

3.2 Sample Shipment

Samples are to be treated in an appropriate and suitable manner for delivery to the analytical laboratory. All packaging and labels shall comply with Federal Department of Transportation regulations as provided in 49 CFR 171-178. Specific requirements for sample shipment are outlined in the QAPP.

3.3 Quality Assurance Manual Methods for PM,. These are measures Airtek staff take to ensure the quality of data from manual PM 10 samplers. The same procedures may be used for TSP and lead samplers when monitoring for those. Because of US EPA requirements, a different set of procedures is used for PM2.5. A manual PM monitoring system consists of a sampling system at the site, an analysis system at a central location and a transportation system to get the sample filters from one to the other.

The sampling system consists of a sampler (one or more at each site) and a human sample collection staff who loads new (unexposed) filters into the sampler, sets it to sample the filter for 24 hours (normally midnight to midnight) on a specified day, and retrieves the exposed filter afterward. The gravimetric analysis system consists of a laboratory balance and a human analyst trained to operate it. The weighing should take place in controlled temperature and humidity. Before being weighed, both unexposed and exposed filters must be conditioned for at least 24 hours in this environment.

The unexposed and exposed sample filters are transported in their cartridges to reduce the chance of contamination. • Traceability of standards: o flow: orifices certified against a NIST-traceable displacement meter o pressure drop: manometers certified NI ST-traceable annually

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