Environmental testing memo, BMCC, Dec 2001

NYC 9/11 Public Portal Document

or background levels of airborne lead, chromium, arsenic and iron concentrations. All samples indicated levels below the NIOSH or ACGIH limits established for airborne concentrations of these metals. Refer to the attached American Analytical Laboratories analysis for results presented in Appendix D.

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. Samples for volatile organic compounds were collected with a MINIRAE 2000, direct reading photoionization detector on December 15~". Samples were collected within the North Building, the South Building and the 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 within the areas sampled. Please refer to Table 3 for measured results. The analytical results of VOC testing are presented in Table 3 below.

Table 3 VOCAir SamplinR Sample No. Location VOC ppm V-01 7th Floor North Room 779 0.0 V-02 6` Floor North Hallway by Room 635 0.0 V-03 5th Floor North Hallway by Room 513 0.0 V-04 4th Floor North Room 416 0.0 V-05 3 Floor North Elevator Lobby #1 0.0 V-06 2° Floor North Room 212 0.0 V-07 Basement North Hallway by Room 102 0.0 V-08 Outside West Loading Dock 0.0 V-09 7th Floor South Stairs #4 0.0 V-10 6th Floor South Room 631 0.0 V-11 5th Floor South Room 500-505 LRC 0.0 V-12 4`h Floor South Room 400 Library 0.0 V-13 3` Floor South Hallway by Room 368 0.0 V-14 21 Floor South Cyber Cafe II 0.0 V-15 Basement South Room 172 0.0 V-16 Outside Harrison Street by North Stairs 0.0 V-17 Trailer 111 0.0 V-18 Trailer 109 0.0 V-19 Trailer 107 0.0 V-20 Outside Trailer 107 0.0 V-21 Trailer 105 0.0 V-22 [Trailer 103 0.0 V-23 Trailer 101 0.0 V-24 Trailer Harrison Street East 0.0 V-25 Trailer Harrison Street West 0.0

NYC-WTC 000106408