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Analytical results for air samples at M894 school, April 2002

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Laboratory report page showing analytical results for air samples collected at the referenced school in late March or early April.

NYC-WTC_000175588
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NYC 9/11 Public Portal Document

Maa 08 02 12:a2p PSC SI 0-921-9BB7 P-

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING •EPAINVLAP1DI262-0 •NYDOHlNELAC 10303 •NJDEP PA020 •AIHAACCREDITATIDNNO. 1D0429 ’PADEP06-353 •C7 DFHPH-O23B •NCDENR599

analytical services Analytical Results for ATC Associates WorkOrder: R02041134 Client Reference: 19125-0290

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) (nig/m^) : (ppm) (ug)

Client ID: SI ATC-0426-M894 Lab ID: -01A Date Sampled: 4/26/02 Matrix: Filter Air Vol.(L): 1020 Total Particulate Matter <50.0 <0.0490 50 N0500 05/02/2002 ADM

Silica (Quartz Total) <5.00 , <0.00490 5 AIRBORNE SILICA 05/02/2002 ADM

Client ID: S2 ATC-0426-M894 LablD:-02A Date Sampled: 4/26/02 Matrix: Filter AirVol.(L); 1020 Total Particulate Matter <50.0 <0.0490 50 N05O0 05/02/2002 ADM

Silica (Quartz Total) <5.00 <0.00490 5 AIRBORNE SILICA 05/02/2002 ADM

Client ID: S3 ATC-0426-MS94 Lab ID: -03A Date Sampled: 4/26/02 Matrix: Filter Air Vol,(L): 1020

Total Particulate Mailer <50.0 <0.0490 50 N0500 05/02/2002 ADM

Silica (Quartz Total) <5.00 <0.00490 5 AIRBORNE SILICA 05/02/2D02 ADM

Client ID; S4 ATC-0426-M894 Lab ID: -04A Date Sampled: 4/26/02 Matrix: Filter Air VoI.(L); NA

Total Particulate Matter <50.0 50 N0500 05/02'2002 ADM

Silica (Quartz Total) <5.00 5 AIRBORNE SILICA 05/02/2002 ADM

(a) Analysis indicates possible breakthrough; back section result is greater than 0% of the front section result.

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

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CONFIDENTIAL, CITY_21MC100_003431784 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175588

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NYC-WTC_000175588Source: NYC Law Department, mirrored locally

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