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Asbestos air fiber results, 100 Church Street ambient, Feb 2002

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TRC Environmental Corporation lab report detailing PCM microscopy fiber analysis for ambient air samples at 100 Church Street.

NYC-WTC_000174387
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NYC 9/11 Public Portal Document

Sei b#: 202023410 P 1 of 1 Client Name: TRC Environmental Corporation Phase Contrast Microscopy (PCM) Fiber Results 35052-0000-00007; New York City Law Department; 100 Church Street, AMBIENT Flow Air Fiber Fibers SciLab Client Rate Duration Density Cone. Filtered pigUs Fibers TWA Sample # Sample # / Location Collected (liters/min.) (min.) (Fibers/mm^ ) (Fibers/cc) (liters) 01 GS-2/22/02-ASB-0683 2/22/02 5 270 1350 100 4 5.10 < 0.002 6th Floor, East Side Hallway 02 GS-2/22/02-ASB-0684 2/22/02 5 270 1350 100 4 5.10 < 0.002 6th Floor, East Side Hallway 03 GS-2/22/02-ASB-0685 2/22/02 0 0 0 100 0.5 0.64 Blank Footnotes: / 04 GS-2/22/02-ASB-0686 2/22/02 0 0 0 100 0.5 0.64 Blank Footnotes: / Reporting Notes: (1) Fibers/cc cannot be calculated fw IpSTsixmjn^^th no air volume. Analyzed by: Tatyana Grimchak : Date Analyzed: 2/23/02 Saijipies analyzed by NIOSH 7400(A) NJeihoA^ 8/15/94: Limit of Detections 5.5 fibers per 100 fields or 7 fibers/nim2: This report relates ONLY to the sample analysis expressed as fibers/sq mm of filter area: ND=No fibers observed: NA=Nct Analyzed; Walton-Beckett graticle field area = 0.00785 mmd: TWA = 8 Hr TWA calculation assumes zero exposure for remainder of 3 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 fiber/cc standard: Estimated relative standard deviation: Intralab Sr=0.405, Interlab Sr=0.45, New York samples (NYSDOH ELAP Lab # 11480): National Institute of Standards and Technology Accreditation requirements mandate that this report must not be reproduced except in full without the approval of the laboratory. AIHA # 102843.

NYC-WTC_000174387

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NYC-WTC_000174387Source: NYC Law Department, mirrored locally

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