Air quality analysis report, 22 River Terrace, Sep 2001

NYC 9/11 Public Portal Document

SciLab Job #: 201092833 Page I of "1 Client Name: GCI Environmental Advisory, Inc. Phase Contrast Microscopy (PCM) Fiber Results NOI-B-4086; Rockrose Development Corp.; 22 River Terrace, NYC / CLEARANCE Flow Air Fiber Fibers SciLab Client Date Rate Duration Filtered Fields Fibers Density Cone. TWA Sample # Sample #1Location Collected {literstmin.) {min.} (liters) (Fibers/mm 2 } (Fibers/cc) 01 22-9/22/01-63 9/22/01 15 60 900 100 4 5.10 < 0.003 Room: Bathroom / CAS 02 22- 9/22/01- 64 9/22101 15 60 900 100 3 3.82 < 0.003 Zoom: Bathroom/CAS 03 22-9/22/01-65 9/22/01 15 60 900 100 3 3.82 <0.003 Room: Bathroom / CAS 04 22-9/22/01-66 9/22/01 15 60 900 loo 3 3.82 < 0.003 ;Room: Kitchen / CAS 05 22-9/22/01-67 9122/01 15 60 900 100 5 6.37 <0.003 ~ oom: Kitchen / CAS 06 P11 -Poom: Kitchen 22-9/22/01-68 / CAS 9122101 15 60 900 100 3 3.82 < 0.003

07 22-9/22/01-69 9/22/01 I5 60 900 100 3 3.82 < 0.003 Room: Kitchen / CAS 08 22- 9/22/01- 70 9/22101 15 60 900 100 4 5.10 < 0.003 ;Room: Kitchen / CAS 09 22-9/22/01-71 9/22/01 15 60 900 100 5 6.37 < 0.003 !Room: Living Room / CAS 10 22- 9/22/01- 72 9/22/01 15 60 900 100 6 7.64 0.003 ;;Room: Living Room / CAS -.-.- Reporting Notes: c op c v V- Date Analyzed: 9/23/01

Samples analyzed he N I(O5t 1741/A) Method, 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 fibers/sq into of fi tter area; ND= no fibers observed; NA - not analyzed; Walton-I:cck t, ,', adi~ ule field area 0.00785 mm2; TWA =8 I-Ir TWA ealcutadon assumes zero exposure for remainder of 8 hr period not sampled; Upper 95 %b Confidence limit (Employers Compliance Test)- Calculated as a one sided UCL to determine 95% certainty of compliance with the 0.01 fiber/ee standard; Estimated relative standard deviation: lntratab Sr=0.405, IntedabSr=0.45, New York samples (NYSDOII FLAP Lab # 11480); National Institute of Standards and Technology

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