NYC 9/11 Public Portal Document
SciLa #: 202031845 of 1
Client Name: TRC Environmental Corporation
Phase Contrast Microscopy (PCM) Fiber Results
35052-0000-00007; New York City Law Department; 100 Church Street, OSHA
Flow Air Fiber Fibers
SciLab Client Date Rate Duration Filtered Density Cone.
Fields Fibers TWA
Sample # Sample # / Location Collected (Hters/min.) (min.) (liters) (Fibers/mm^ ) (Fibers/cc)
01 GS-3/7/02-STEL-0330 3/7/02 2 30 60 100 4 5.10 < 0.045
Ceasar Rodriguez
02 GS-3/7/02-STEL-0331 3/7/02 2 30 60 100 3 3.82 < 0.045
Fabien Peneyra
03. GS-3/7/02-STEL-0332 3/7/02 0 0 0 100 0.5 0.64
Blank Footnotes: I
04 GS-3/7/02-STEL-0333 3/7/02 0 0 0 100 0.5 0.64
Blank Footnotes: /
Reporting Notes:
(1) Fibers/cc cannot bo.calcui^d fon s Aiples (or blanks) with no air volume.
Analyzed by; Marvin Brothers y yvA OaA Date Analyzed: 3/8/02
Samples analyzed by NIOSH 7400(A) Method, Issue #2, 8/15/94: Limit of Detection= 5.5 fibers per 100 fields or 7 fibers/mm2: 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 graticle field area = 0.00785 mm2: 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 fiber/cc standard: Estimated relative standard deviation: Intralab Sr=0.4O5. Interlab Sr=0.45, New York samples (NYSDGH 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. AIEA # 102843.
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NYC-WTC_000174431
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000174431Source: NYC Law Department, mirrored locally