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NYC-WTC_000197613

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NYC 9/11 Public Portal Document 610-921-9667 p. 16 Rpr 11 62 03:47p PSC

F’SC INDUSTRIAL HYGIENE • EPWNVLAP101262-0 • AIHA ACCREDITATION NO. 100439 ■NCDENR599 ENVIRONMENTAL TESTING • NY COtXNElAC 10903 * PA DEP 06-363 ■NJDEPPAtQO • CT DPH PH-C23a

ANALYTICAL SERVICES Analytical Results for ATC Associates WorkOrder: R02040275 Client Reference; 19125-0246 Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) ;■ (mg/m’) ; (ppm) (“g)

Client ID; Dusll ATC-0402-STY Lab ID: -01A Date Sampled: 4/2/02 Matrix: Filter AirVol.(L): 1440 Total Particulate Matter <50.0 <0.00347 ~ 50 NO500 04/09/2002 TEN

(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 (LOD). —: Information not available or not applicable. Back sections were checked and showed no significant breakthrough.

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CITy_2IMCl0 0_0 03 0 4632 0

NYC-WTC_000197613

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NYC-WTC_000197613Source: NYC Law Department, mirrored locally

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PSC Analytical Services results for dust samples collected at P.S. 89M on February 27, 2002.

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