Air quality analysis report, 22 River Terrace, Sep 2001

NYC 9/11 Public Portal Document

SciLab Job #: 201092732 Page 2 of " 2 Client Name: GCI Environmental Advisory, Inc. Phase Contrast Microscopy (PCM) Fiber Results NO1-B4O86; Rockrose Development Corp.; 22 River Terrace, NYC /CLEARANCE Flow Air Fiber Fibers SciLab Client Date Rate Duration Filtered Density 2 Cone. Fields Fibers TWA Sample # Sample # / Location Collected (liters/ruin.) } {min.) (liters) (Fiberslmm ) (Fibers/cc)

16 -9121-38 9/21/01 15 60 900 100 3 3.82 <0003 Apt l ;Room /CAS 17 1-9121-39 9/21/01 15 60 900 100 2 2.55 < 0.003 Apt: VCAS •• 18 -9/21-40 9/21/01 15 60 900 100 4.5 5.73 < 0.003 Apt; I I I /CAS 9 ?-9/21-41 9/21/01 15 60 900 100 2 2.55 < 0.003 Apt l ACAS 20 -9/21-42 9/21/01 15 60 900 100 3 3.82 < 0.003 Apt! Zoom /CAS Reporting Notes: ~I ... — 7 p Analyzed fret Ttt}anaficntchak fT'-~_ _ _j 6 ; Date

Samples analyzed by NIOSH 74;) ;. . . Method, Issue C. o 15/94; Limit of DectCcttoii= > i f ibex r jar 10o fields ur 7 filx rr?mm2; This report relates ONLY to the sartpte analysis expressed as fiberslsq mm of filter area; ND = no fibers observed; NA = not analyzed; Walton-Beckett gradieuh a:ld area if ( r5 otmC; TWA =S Hr 1'VA caiculat i m ,t _unit: rer esposttre for remainder of 8 hrperiod not sampled. Frper 001 Confidence limit (Employers Compliance Test)- Calculated as aone sided UCL to determine 959 certainty of eompliuree aith the 0.01 'Thence standard; Estimated relative standard deviation: IntraL ib Sr=0.405, lnterlab Sr=o.45, New torksamples C Y.fDOH ELAP Lab # 11480); National Institute of Standards andTeehnology

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