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NYC-WTC_000226853

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NYC 9/11 Public Portal Document Feb 19 02 11:42a PSC Analytical Services 6109219667 p.5 PSC ANALYTICAL SERVICES Analyte Client ID: S1 ATC-0131-89M Total Particulate Matter INDUSTRIAL HYGIENE •EPANVLAP 101262-0 •AIHA ACCREDITATION NO. 100439 • NC DENR 599 Analytical Results for ATC Associates WorkOrder: R02020122 Client Reference: 19125-0297 Concentration (ug) Lab ID: -01A (mg/m") (ppm) Date Sampled: 1/31/02 0.0490 ENVIRONMENTAL TESTING •NY DOHNELAC 1D903 •NJ DEP 77020 • PA DEF 06-353 •CT DPK PH-0238 Limit of Detection (ug) Test Method Date Analyzed IAnalyst Matrix: Filter N0500 Air Vol.(L): 1020 02/11/2002 ADM Silica (Quartz Total) Ist floor hal'way cutside efateria-nor Client ID: S2 ATC-0131-89M Total Particulate Matter 0.0137 - 50 10 AIRBORNE SILICA 02/11/2002 ADM Lab ID: -02A <50.0 Date Sampled: 1/31/02 <0.0490 - <0.00980 - 50 Matrix: Filter NO500 Air Vol.(L): 1020 02/11/2002 ADM Silica (Quartz Total) <10.0 Iit floor hallwny outside cateteris - south Client ID: S3 ATC-0131-89M Lab ID: -03A Tolal Particulate Matter <50.0 AIRBORNE SILICA 02/11/2002 ADM Date Sampled: 1/31/02 <0.0490 Silica (Quartz Total) Cafetevia Client ID: S4 ATC-0131-89M Total Particulate Matter <10.0 <0.00980 - 50 10 Matrix: Filter NO500 AIRBORNE SILICA Air Vol.(L): 1020 02/11/2002 ADM 02/11/2002 ADM Lab ID: -04A <50.0 Date Sampled: 1/31/02 <D.0490 - Matrix: Filter N0500 Air Vol.(L): 1020 02/11/2002 ADM Silica (Quartz Total) Gymnaslam Client ID: S5 ATC-0131-89M Total Particulate Matter <10.0 <0.00980 50 10 AIRBORNE SILICA 02/11/2002 ADM Lab ID: -OSA <50.0 Date Sampled: 1/31/02 <0.0490 Matrix: Filter N0500 Air Vol.(L): 1020 02/11/2002 • ADM Silica (Quartz Total) Anditorium Client ID: S6 ATC-0131-89M Fotal Particulate Matter <10.0 <0.00980 - - 50 10 AIRBORNE SILICA 02/11/2002 ADM Lab ID: -06A <50.0 Date Sampled: 1/31/02 <0.0490 Matrix: Filter NO500 Air Vol.(L): 1020 02/11/2002 ADM Silica (Quartz Total) RoaM 326-north 13.0 0.0127 - 50 10 AIRBORNE SILICA 02/91/2002 ADM Page T of2 NYC-WTC_000226853 CITY_21MC100_000623955

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NYC-WTC_000226853Source: NYC Law Department, mirrored locally

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