Asbestos air and dust test results, BMCC, Feb 2002

NYC 9/11 Public Portal Document

PSI collected 5 representative air samples on January 11`h, 2002, one from each of four of the Trailers and one from a nearby outside area. Samples were collected and analyzed by NIOSH Method 0500 to determine ambient or background airborne total dust concentrations. Total dust concentrations ranged from 4.452 mg/m3 to 9.095 mg/m3 which are below the OSHA limit of 1$ mg/m3 and the ACGIH limit of 10 mg/m3. Analytical results are shown below in Table 5. Samples collected on January 11 have the suffix "0111" attached.

Table 5 Total Dust Air Sampling (January 11". 2002) Sample No. Location Total Dust TD-01/0111 Trailer # 110 9.095 m TD-02/0111 Trailer # 108 8.525 m TD-03/0111 Trailer # 106 4.452 m3 TD-04/0111 Trailer # 104 5.611 mg/m3 TD-05/0111 Outside Trailer # 101 — North side 5.631 m TD-FBL-1 Field Blank 1 Not detected

Volatile Organic Compounds (VOC) Measurement of total VOC's is used to determine general quality of air associated with the level of volatile organic compounds. 25 samples for volatile organic compounds were collected with a MINIRAE 2000, direct reading photoionization detector on January 11`h, 2002. Samples were collected within the North Building, the South Building and Trailers. Outside air background samples were also collected. The Indoor Air Quality Association (Standard IAQA #95-1) recommends levels be at or below 3.0 ppm for acceptable indoor air quality. The data indicated that total VOC's were not detected in 18 of the areas sampled. VOC's were detected in 7 of the samples, however at a concentration of 0.1 ppm the levels are below the IAQA guideline. Please refer to Table 6 for measured results.

Table 6 VOCAir Sampling Sample No. Location VOC ppm V-01 7th Floor North Room N733 0.0 V-02 6th Floor North Room N620 0.0 V-03 5th Floor North Room N505 0.0 V-04 4th Floor North Hallway by Escalator 0.0 V-05 3` Floor North Hallway by Room N320 0.0 V-06 2° Floor North Gymnasium 0.0 V-07 Basement North Lobby by Room N123 0.0 V-08 Outside South Harrison Street 0.0 V-09 7`h Floor South Hallway by Escalator 0.0 V-10 6th Floor South Room S632A 0.0 V-11 5t1 Floor South Room S508 0.0 V-12 4`h Floor South Room S400 Library 0.1 V-13 3 Floor South Conference Center 0.0 V-14 2nd Floor South Bathroom Lobby 0.0 V-15 Basement South Room S110 0.0 V-16 Outside North Harrison Street 0.0 V-17 Trailer 112 0.1 V-18 Trailer 110 0.1

NYC-WTC 000106388