NYC-WTC_000209413

NYC 9/11 Public Portal Document

DMFTM 2. Post cleaning air samples for fibrous glass and silica shall be collected concurrently with the asbestos clearance air sampling procedures specified herein. Five samples for fibrous glass and one sample for silica shall be collected in each apartment.

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

A fter 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.

5. The detection limit for PAHs shall be no greater than 1 pgW.

6. Samples containing concentrations of specific congeneric analytes (PCDDs and PCDFs) considered within the scope of the dioxin sampling method that are greater than ten times the upper MCLs must be analyzed by a protocol designed for such concentration levels, e.g., Method 8280. Analytical results shall be reported using a 2,3,7,8-TCDD toxicity equivalence (TEQ). The TEQs shall be reported four ways. A TEQ which sets non-detects to zero (i.e., TEQ (ND=0), a TEQ which sets non-detects at 1/2 the detection limit (i.e., TEQ (ND=l/2), a TEQ Estimated Maximum Potential Concentration with non-detects set to zero (i.e., TEQ EMPC (ND=0), and a TEQ Estimated Maximum Potential Concentration with non-detects set to 1/2 the detection limit (i.e., TEQ EMPC (ND=l/2). Please see attachment 2 for the format and data to report for dioxin wipe samples.

Table 1: Sampling and Analytical Methods Parameter Description Sampling Analytical Method Maximum Methodology Turnaround Time Lead Wipe samples HUD Appendix 13.1 EPA Method SW-846-6010B 1 day PAHs Wipe samples ASTM D6661-01 ASTM-6661-01 14 days EPA SW-846-8270C_______ Dioxin Wipe samples ASTM 6661-01 ASTM 6661-01 14 days EPA Method SW-846-8290 Fibrous Air samples NIOSH 7400 NIOSH 7400, 3 days Glass Counting Method “B” Crystalline Air samples NIOSH 7500 NIOSH 7500 (XRD) 14 days Silica Asbestos Air samples Collection using Asbestos Fiber Analysis by 1 day NIOSH 7400 Transmission Electron Microscopy (TEM) Performed by EPA 40 CRF Part 763 Final Rule (AHERA) [see Attachment 1] and NIOSH 7400 (PCM)

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