PCM fiber results lab report, Aug 1997

NYC 9/11 Public Portal Document

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Ciient Maine. ipplied Technology Services, Inc. Phase Contrast Microscopy (PCM) Fiber Results A97195; FH 2nd Floor Lab Flow . Air Fiber Fibers Client Date pie # Sample # / Location Collected Rate Filtered Fields Fibers Density Cone. TWA (liters./!n!n.) (liters) (Fibers/nun ) (FibersZee) 25082797-01 8/27/97 0 0 0 100 0.5 0.64 Blank Footno/es: / 25082797-02 8/27/97 0 0 0 100 0.5 0.64 Blank Footnotes: / 25082797 03 5 390 1950 NA Study Hall in Tent# I. IWA Footnotes: 2 25082797 04 8/27/97 5 390 1950 NA By Handicap Bathroom, OWA Footnotes: 2 25082797-05 5 390 1950 NA Nonh Side in Tent #2. IWA Footnntes: 2 25082797 06 SI27/91 5 390 1950 NA Study Hall, OWA Footnotes: 2 25082797-07 8/27/97 5 390 1950 100 20 25.48 0.005 Al Remote Dccoti, OWA porting Notes: :) Fibers/oc cannot be calculated for samples (or blanks) with no air volume. . '.) Analyst was unable Io quantify Ober concenhilion becalise of overloading of particulate material on the Oller. Analyzed by: Fred Corirossi_____ = Date Analyzed: 8/27/97 ELAP # 11480. Samples analyzed by NlOSll VdOOfAiMBTHOD, Issue #2. 8/15/94: Limit of Detection = 5.5 libers per 100 Fields or 7 Fibers / mm2; This report relates ONLY to the sample analysis exptessei as fibers/sq mm of filler area; ND = no fibers observed; NA = Not Analyzed; Walton - Beckett gratiicule field area 0.00785 mm2; Duration in minutes; TWA = 8Hi TWA calculation assumes zero exposure for remainder of 8 hour period not sampled; Upper 95% Confidence IJinit (Employer's Compliance Test) - Calculated as a one sided UCL to determine 95% certainty of compliance wilfi the 0.01 fiber/oc standard; Estimated relative standard deviation; Iniralab Sr = 0.270, Inter lab Sr = 0.450. Phase Conlrasl Microscope; Olympus, Model Cll-2.

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NYC-WTC_000186281