Environmental testing memo, BMCC, Dec 2001

NYC 9/11 Public Portal Document

Table 2Lead line Sampling Sample No. Location Results - Lead Concentration Pb-01 Field Blank prior <10.0 ug/wipe Pb-02 Floor - Hallway by Rm. N736 <10.0 u ft Pb-03 Floor-Rm. N635 North Center <10.0 u ft2 Pb-04 Floor-Hallway by Rm N501 <10.0 ug/ft2 Pb-05 Floor-Lobby by Rm N404 <10.0. u ft Pb-06 Floor-Across from Rm. N301 <10.0 u ft2 Pb-07 Floor-Passageway between N & S bldgs. <10.0 u ft2 Pb-08 Floor-Lobby by Rm N212 <10.0 u ft2 Pb-09 Floor-Gym by NW entrance <10.0 u ft Pb-10 Floor-2" Flr. Lobby NW entrance <10.0 u ft2 Pb-11 Floor-1' Flr. By West entrance <10.0 u ft2 Pb-12 Field Blank after <10.0 ug/wipe Pb-13 Field Blank prior <10.0 ug/wipe Pb-14 Floor-Hallway by Rm S736A <10.0 u ft Pb-15 Floor-Room S602 <10.0 u ft2 Pb-16 Floor 5th Flr. Escalator landing <10.0 u ft2 Pb-17 Floor 4th Flr. Entrance to Library <10.0 u ft2 Pb-18 Floor-Hallway by Rm. S368 <10.0 u ft2 Pb-19 Floor-Hallway by Rm. S206A <10.0 u ft2 Pb-20 Floor-2°d Flr. Cafeteria entrance <10.0 u ft Pb-21 Floor-Hallway by Rm S165 <10.0 u ft2 Pb-22 Field Blank after <10.0 ug/wipe

Air Sampling for Nuisance Dust & Silica PSI collected 2 representative air samples from each odd numbered floor of the North and South Buildings on December 20th, 2001. Samples were collected from common corridors, escalators, the Gymnasium and Theater 3. A total of 16 samples were collected and analyzed by National Institute for Occupational Safety and Health (NIOSH) Method 7500 to determine ambient or background airborne nuisance dust and respirable silica concentrations. Nuisance dust concentrations ranged from 0.0578 mg/m3 to 0.6778 mg/m3 which are below the Occupational Safety and Health Administration (OSHA) limit of 5 mg/m3 and the American Conference of Governmental Industrial Hygienists (ACGIH) limit of 3 mg/m3. Respirable silica was detected in two (2) samples and not detected in fourteen (14) samples. Concentrations in the two samples detected were 0.0213 mg/m3 and 0.0276 mg/m3, which are below the NIOSH limit of 0.05 mg/m3 and the ACGIH limit of 0.1 mg/m3. Refer to the attached laboratory analysis conducted by EMSL Laboratories for the analytical results presented in Appendix C.

Sampling for Airborne Metals Concern regarding the cutting and transport of WTC structural members adjacent to the College prompted investigation for potential airborne metals. Air samples were collected on December 15th from each floor in the North Building and South Building and from eight (8) Trailers. A total of 23 samples were collected and analyzed by NIOSH Method 7300 to determine ambient

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