NYC-WTC_000221461

NYC 9/11 Public Portal Document ooo r r- “

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING • EPA/NVLAP 101262-0 •IWDOHINELAC10903 •NJDEP PAt)20 • AIHA ACCREDITATION NO. 100439 •PA CEP 08-353 •CT DFHPW323B •NCDENR599

ANALYTICAL SERVICES Analytical Results for ATC Associates WorkOrder: R02040881 Client Reference: 19125-0297, Metals

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) • (mg/m’) i (ppm) (ug)

Client ID: ATC-04I8-89M-M5 Lab ID; -OSA Date Sampled: 4/18/02 Matrix: Filter Air Vol.(L); NA Aluminum <1.00 1 N7300 MCE 04/30/2002 AJ8 Cadmium <0.200 0.2 N7300 MCE 04/30/2002 AJB Chromium 0.435 0.2 N7300 MCE 04/30/2002 AJB Cobalt <0.100 0.1 N7300 MCE 04/30/2002 AJB Copper <0.200 0.2 N7300 MCE 04/30/2002 AJB Iron <2.00 2 N7300 MCE 04/30/2002 AJB Lead <0.300 0.3 N7300 MCE 04/30/2002 AJB Magnesium <1.30 1.3 N7300 MCE 04/30/2002 AJB Manganese <0.300 0.3 N7300 MCE 04/30/2002 AJB Molybdenum <1.00 1 N7300 MCE 04/30/2002 /VB Nickel <0.200 0.2 N7300 MCE 04/30/2002 /VJB Zinc <0.500 0.5 N7300 MCE 04/30/2002 AJB

Client ID: ATC 041S--89M-M6 Lab ID; -06A Date Sampled: 4/18/02 Matrix: Filter Air Vol.(L): NA Aluminum <1.00 1 N7300 MCE 04/30/2002 AJB Cadmium <0.200 0.2 N7300 MCE 04/30/2002 AJB Chromium 0.551 0.2 N7300 MCE 04/30/2002 /\JB Cobalt <0.100 0.1 N7300 MCE 04/30/2002 /\JB Copper <0.200 0.2 N7300 MCE 04/30/2002 AJB Iron <2.00 2 N7300 MCE 04/30/2002 AJB Lead <0.300 0.3 N73O0 MCE 04/30/2002 AJB Magnesium <1.30 1.3 N7300 MCE 04/30/2002 AJB Manganese <0.300 0.3 N7300 MCE 04/30/2002 /VIB Molybdenum <1.00 1 N7300 MCE 04/30/2002 /LJB Nickel <0.200 0.2 N7300 MCE 04/30/2002 AJB Zinc <0.500 0.5 N7300 MCE 04/30/2002 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_000221463