PCM fiber results lab report, NYC Law Department, Mar 2002

NYC 9/11 Public Portal Document

Sc e ob #: 202031112 Client Name: TRC Environmental Corporation 1 of 1 “

Phase Contrast Microscopy (PCM) Fiber Results 35052-0000-00007; New York City Law Department; 100 Church Street / OSHA Flow Air Fiber Fibers SciLab Client Rate Duration Filtered Density Cone. Fields Fibers TWA Sample # Sample # / Location Collected (liters/min.) (min.) (liters) (Fibers/mm^ ) (Fibers/cc)

01 GS-3/1/02-OSHA-0310 3/1/02 2 300 600 100 1 1.27 <0.004 Jose Ramon 02 GS-3/1/02-OSHA-0311 3/1/02 2 300 600 100 2.5 3.18 <0.004 Wilfredo Ramirez 03 GS-3/1/02-OSHA-0312 3/1/02 2 330 660 100 4 5.10 < 0.004 Jose Ramon 04 GS-3/1/02-OSHA-0313 3/1/02 2 330 660 100 1 1.27 < 0.004 Wilfredo Ramirez 05 GS-3/1/02-OSHA-B1 3/1/02 0 0 0 100 0.5 0.64 Blank Footnotes: 1 06 GS-3/1/02-OSHA-B2 3/1/02 0 0 0 100 0.5 0.64 Blank Footnotes: 1 Reporting Notes: (1) Fibers/cc cannot be Wjtluio-air volume. Analyzed by: Anthony Hinton . Ite Analyzed: 3/1/02 Samples analyzed by NIOSH ?! V J/1B/J4; Limit of Deteclion= 5.5 fibers per 100 fields or 7 fibers/rnm2: This report relates ONLY to the sample analysis expressed as fibers/sq mm of filter area: ND=No fibers observed; NA= Not Analyzed; Walton-Beckett graticli field area = 0.00781 mji|2; TWA = 8 Hr TWA calculation assumes zero exposure for remainder of 8 hr period not sampled; Upper 95% Confidence limit (Employers Compliance Test)- Calculated as a one sided UCL to determine 95% certainty of compliance with the 0.01 Aiber/ceSundard; Estimated relative standard deviation; Intralab SifO.405, Interlab Sr=0.45, New York samples (NYSDOH ELAP Lab # 11480): National Institute of Standards and Technology Accreditation requirements mandate that this report mtwtnotb^produced except in full without the approval of the laboratoiy. AIHA # 102843.

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