NYC-WTC_000195949

NYC 9/11 Public Portal Document

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lieiil Name: Applied reclinolngy Services, Iiic.

Phase Contrast Microscopy (PCM) Fiber Results JobffA96267/30W EmployeetfAR/12 & 13 Flrs7DURINOS Flow Air Fiber Fibers Client Date Diirntioii Rate Filtered Fields Fibers Density Cone. IWA Suiiipie n / LoCiiiiuii Ciiiiectcii (iiiiii.) (liters/inin.) (liters) (Fibers/mm ) (Fibcis/cc)

AR-123096-13 I 2/30/96 15 40 600 100 29 36.94 0.02370 I)iii-l2NW-WC-lnsi(le AR-123096-14 I 2/30/96 15 40 600 100 31 39.49 0.02533 Dur-12SNW-WC-Oiilsi(lc orliiig Noles: I Fibeis/cc cannot be calculated (or sainp1e^(pr blanks) with no air vol nine. Analyzed by: Bince Lockwood L- r .Samples analyzed liy NIOSII 7400(A) MEI HOI), Issue «2, 8/15/94; PAT Lab K08939; NYSDOII EI.AP Lab #11480; Tills tepotl relates ONLY Io Ilie sample analysis expressed as ni,cis/si| mm of Eller aieii; ND = no Ebers observed; Walton - Beekell grailiciile Ecld area 0.00785 mm2; Dmalion In niiniiles; TWA = 81 Ir TWA, caicnialioii assumes zero exposure for temainder of 8 hour period not sampled; Csliiiialed Limit of Deleclion = 5.5 fibers / 100 fields or 7 Ebers / miii2; Eslimated relative slandard deviation: Iniralab Sr = 0.27, Inlerlab Sr = 0.45

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NYC-WTC_000195950