NYC-WTC_000232099

NYC 9/11 Public Portal Document

DRAFT sample for silica shall be collected in each apartment.

3. Wipe samples shall be collected before and after cleaning for lead, mercury, dioxin, and PAHs.

Prior to the cleaning activities, three wipe samples shall be collected for each of these parameters in each apartment. The sampling locations shall be a wall, a bare floor, and a counter or tabletop.

After cleaning activities, three wipe samples shall be collected for each of these parameters in each apartment. The sampling locations shall be a wall, a bare floor, and a counter or tabletop; preferably at the same location as the pre-cleaning samples.

4. The required sampling and analytical procedures are specified in Table 1.

Table 1: Sampling and Analytical Methods Parameter Description Sampling Methodology Analytical Method Lead Wipe samples HUD Appendix 13.1 EPA Method SW-846-6010B PAHs Wipe samples ASTM D6661-01 ASTM-6661-01 EPA SW-846-8270C_______ Dioxin Wipe samples ASTM 6661-01 ASTM 6661-01 EPA Method SW-846-8290 Fibrous Glass Air samples NIOSH 7400 NIOSH 7400, Counting Method “B” Crystalline Silica Air samples NIOSH 7500 NIOSH 7500 (XRD)_______ Mercury Wipe samples HUD Appendix 13.1 EPA Method SW-846 7471A

Asbestos Air Sample Collection and Analysis

1. All asbestos air samples collected during clean-up activities shall be analyzed via TEM. The method of analysis and sampling methodologies shall be in accordance with the applicable sections of Title 15, Chapter 1 of the Rules of the City of New York and AHERA.

2. A turnaround time of 24 hours is required for all samples.

3. Asbestos clearance air samples shall be analyzed in accordance with the NIOSH 7400 Method, and analyzed by PCM followed by TEM. The laboratory shall report a PCMe value of all fibers greater than 5 microns in length. Therefore, the lab shall report PCM, TEM and PCMe values for each sample.

Asbestos Air Monitoring

1. Ata minimum, five (5) TEM samples shall be collected per day during cleanup activities.

2. Samples shall be collected at isolation barriers outside the work area, the clean room of the worker/waste decontamination facility, and outside of the building.

3. Sample collection during clean up activities shall be in accordance with Title 15, Chapter 1 of the

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CITY_DEP_WORBY_CANNATA_SUBP_000083701

NYC-WTC_000232101