Air quality analysis report, 22 River Terrace, Sep 2001

NYC 9/11 Public Portal Document

SciLab Job #: 201092773 Page 4 of 4 Client Name: GCI Environmental Advisory, Inc. Phase Contrast Microscopy (PCM) Fiber Results N01-B4086; Rockrose Development Corp.; 22 River Terrace, NYC/ Amended 9/27/01 Flow Air Fiber Fibers SciLah Client Date Rate Duration Filtered Density 2 Fields Fibers Cone. TWA Sample # Sample # I Location Collected (liters/min.) (min.) (liters) (Fibers/mm ) (Fibers/cc)

46 22-9/22-46 9/22/2001 15 62 930 100 4 5.10 < 0.003 l Room Kitchen (CAS) 47 22-9/22-47 9/22/2001 15 61 915 100 9 11.46 0.005 ;Room Kitchen (CAS) 48 22-9/22-48 9/22/2001 15 60 900 100 3 3.82 <0.003 P I I ;Room Kitchen (CAS) 49 22-9/22-49 9/22/2001 15 60 900 100 6 7.64 0.003 Room Kitchen (CAS) 50 22-9/22-50 9/22/2001 15 60 900 100 10 12.74 0.005 Room Kitchen (CAS) Reporting Notes: (1) Fibrsicc cannot he ca uTatcd6r cul ples (or blanks) with no air volume. —_ µ u .J Al ;:\ictorSlopi Date \:cr _J_'OOl

Samples analyzed by NIOSHT 74ItA, Alethad, Issue #2, 8!15;94; Limit of Dectection- 5.5 fibers per 100 fields or 7 fibers/mm2; This report relates ONLY to the sample analysis expressed as fiberstsq mm of filter area; ND = no fibers observed; NA = not analyzed; Walton-Beckett gradicule 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=O.405, Interlab Sr~.45, New York samples (NYSDOH ELAP Lab 8 11480); National Institute of Standards and Technology x ..,.r..C....:.... _......:.......................J..r...6..r .:,:.....,.,-..,........... 6~ .........l.......1 ....,...... :.. G.I I ...b6.,..• r6., ......~.....,i ..f a... 1..1..,«....... A iv n H 11190 A 9

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