PCM fiber results lab report, Sept 1997

NYC 9/11 Public Portal Document

f t iiciLaO Job .. J9-97 - 615 9 Client Name: Applied Technology SeiYices, Inc, Phase Contrast Microscopy (PCM) Fiber Results A97195; DURINGS p'®'* Duration Air Fiber Fibers L'iLab Client Date Filtered Fielils Fibers Density Colic. TWA ,mp!e # Saiiipic # / Locouon Colicci&d (lilers/min.) '***“•' (Fibers/mm '' ) (Fibers/cc) (liters) 01 29 092297 01 9/22/97 5 430 2150 100 5 6.37 < 0.001 DUR- 1st Fl Clean Room Decon 02 29 092297 02 9/22/97 5 430 2150 100 4 5.10 < 0.001 DUR- 1 st Fl N/E Comer by Tenl OWA 03 29 092297 03 9/22/97 5 430 2150 100 10 12.74 0.002 DUR- Isl El N/Side by Tent OWA 34 29 092297 04 9/22/97 5 430 2150 100 9 I 1.46 0.002 DUR- Isl FI N/West Comer by Tent OWA f)5 29 092297 05 9/22/97 5 430 2150 100 5 6.37 < 0.001 DUR- Isl Fl W/Sideby Tenl OWA 36 29 092297 06 9/22/97 0 0 0 100 0.5 0.64 Blank Fuutiicles: / )7 29 092297 07 9/22/97 0 0 0 100 0.5 0.64 Blank Foolnotes: / Reporting Notes: (1) Rbers/cc cannot be calculated for'MmplesT^)j&ai4s9 wiljr no air volume. Analyzed by; Marvin Brothers ft Oale Artalyzed; Samples analyzed by NIOSH 7400(A) METHOD, Issue W2, 8/15/94; Limit of Detection = 5..5 fibers per 100 fields or 7 fibers / nim2; This report relates ONLY Io the sample analysis expressed as Rbers/sq mm of filler area; ND = no fibers observed; NA = Not Analyzed; Walton - Beckett gradicule field area 0.00785 mm2; Duration io minutes; TWA = 8Hr TWA calculation assumes zero exposure for remainder of 8 hour period not sampled; Upper 95% Confidence Limit (Employer's Compliance Test) - Calculated as a one sided UCL to detenninc 95% certainly of compliance with the 0.01 fiber/cc standard; Estimated relative standard deviation: Intralab Sr = 0,270, Interlab Sr = 0.450.

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NYC-WTC_000186283