Client Name; TRC Environmental Corporation
Phase Contrast Microscopy (PCM) Fiber Results
35052-0000-00007; New York City Law Department; 100 Church Street/ Ambient
Flow Air Fiber Fibers
SciLab Client Rate Duration Filtered Density Cone.
Fields Fibers TWA
Sample # Sample # / Location Collected (liters/min.) (min.) (liters) (Fibers/mm^ ) (Fibers/cc)
01 GS-3/12/02-ASB-0353 3/12/02 5 240 1200 100 2 2.55 < 0.002
Rm 3-234
02 GS-3/12/02-ASB-0354 3/12/02 5 240 1200 100 1 1.27 < 0.002
Rm 3-182
.03 GS-3/12/02-ASB-0355 3/12/02 5 240 1200 100 3 3.82 < 0.002
Rm 3-184
04 GS-3/12/O2-ASB-O356 3/12/02 5 300 1500 100 2 2.55 < 0.002
Rm 3-110
05 GS-3/12/02-ASB-0357 3/12/02 0 0 0 100 0.5 0.64
Field Blank Footnotes: /
06 GS-3/12/O2-ASB-O358 3/12/02 0 0 0 100 0.5 0.64
Field Blank Footnotes: /
Reporting Notes:
(1) Fibers/cc cannotcalculated for samples (or blanks) with no air volume.
Analyzed by: Devin Ahyee cPflC*** ,; Date Analyzed: 3/14/02
Samples analyzed by NIOSH 7400(A) Method, Issue #2, 8/15/94: Limit of Detections; 5.5 fibers per 100 fields or 7 fibers/mml: This report relates ONLY to the sample analysis expressed as fibers/sq mm of filter area: ND=No fibers observed; NA= Not
Analyzed; Walton-Bcckett graticle 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=0.405, Interlab Sr=0.45, New York samples (NYSDOH ELAP Lab # 11480): National Institute of Standards and Technology
Accreditation requirements mandate that this report must not be reproduced except in full without the approval of the laboratory. AIHA # 102843.
o
o
I
o
on
on
on
NYC-WTC_000174341
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000174341Source: NYC Law Department, mirrored locally