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NYC-WTC_000226986

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NYC 9/11 Public Portal Document

Jan 07 02 11:03a PSC Analytical Services BiDsaigss? p. 5

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING •EPA/NVLAP101262-D •NYDOHNELAC1D903 •NJ DEP77020 • AIHA ACCREDITATION NO. 10043S -PAOEP 06-353 •CT OPH PH.0238 •NC DENR 599

ANALYTICAL SERVICES Analytical Results for ATC Associates WorkOrder: RO 1120402 Client Reference: 19125-0246; Silica in Air

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) (mg/m’) ; (ppm) (ug) Client ID: ATC-1220-STY-S-] 1 Lab ID: -1 lA Date Sampled: 12/20/01 Matrix: Filter Air Vol.(L);816 Total Particulate Matter <100 <0.123 100 N0500 01/02/2002 ADM Silica (Quartz Total) <5 <0.00613 5 AIRBORNE SILICA 01/02/2002 ADM

Client ID: ATC-1220-STY-S-12 Lab ID: -12A Date Sampled: 12/20/01 Matrix: Filter Air Vol.(L); 816 Total Particulate Matter <100 <0.123 100 N0500 01/02/2002 ADM Silica (Quartz Total) <5 <0.00613 5 AIRBORNE SILICA 01/02/2002 ADM

Client ID: ATC-1220-STY.S-I3, Blank Lab ID: -13A Date Sampled: 12/20/01 Matrix: Filter Air Vol.(L): NA Total Particulate Matter <100 100 N0500 01/02/2002 ADM Silica (Quartz Total) <5 5 AIRBORNE SILICA 01/02/2002 ADM (a) Analysis indicates possible breakthrough; back section result is greater than % of the front section result.

General Notes: <. Less than the indicated limit of detection (LOD). Information not available or not applicable. Back sections were checked and showed no significant breakthrough.

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machine-extracted · confidence unavailable · Check page ↗

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