NYC-WTC_000197657

NYC 9/11 Public Portal Document OlU-OtLl - OOO /

F’SCZ INDUSTRIAL HYGIENE •EPAW7LAP1D1262-0 • AiHA ACCREDITATION NO. 100439 •NCOENR 598 ENVIRONMENTAL TESTING •NY DOLWMELAC 10303 •PA OEP06-353 •NJ OEP PA02O • CT DPH PH-0238

ANALYTICAL SERVICES Analytical Results for ATC Associates WorkOrder: RO2050241 Client Reference: 19125-0246, Metals

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) ■ (mg/m") ; (ppm) (ug)

Client ID: ATC-0501-STY-M5 , Lab ID: -05A Date Sampled: 5/1/2002 Matrix: Filter Air Vol.(L): NA Aluminum <1.00 1 N7300 MCE 05/15/2002 AJB Cadmium <0.200 0.2 N7300 MCE 05/15/2002 AJB ~ Chromium 0.302 0.2 N7300 MCE 05/15/2002 AJB Cobalt <0.100 0.1 N7300 MCE 05/15/2002 AJB Copper <0.200 0.2 N7300 MCE 05/15/2002 AJB iron <2.00 2 N7300 MCE 05/15/2002 AJB Lead 0.322 0.3 N7300 MCE 05/15/2002 AJB Magnesium <1.30 1.3 N7300 MCE 05/15/2002 AJB Manganese <0.300 0.3 N730O MCE 05/15/2002 AJB Molybdenum <1.00 1 N7300 MCE 05/15/2002 AJB Nickel <0.200 0.2 N7300 MCE 05/15/2002 AJB Zinc <0.500 0.5 N7300 MCE 05/15/2002 AJB

(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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NYC-WTC_000197659