NYC-WTC_000199337

NYC 9/11 Public Portal Document Sep 11 02 04:15p PEC eio-aai-see? p - 18

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING PSC <EPAJNVLAP101262-0 •NY DOH/NELAC 10903 •NJDEP PA020 •AIHA ACCREDITATION NO. 100439 • PA DEP 06-353 • CT DPH PH-0238 • NC DENR 599

Analytical Results for

ATC Associates WorkOrder: R02090192 Client Reference: 19125-0342

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ng) (mg/m’> (ppm) (ng)

Client fD; ATC-0904-42M-M5 Lab ID: -05A Date Sampled: 9/4/2002 Matrix: Filter Air Vol.(L): NA

Aluminum <1.00 1 N73O0 MCE 09/10/2002 AJB Cadmium <0.200 0.2 N7300 MCE 09/10/2002 AJB Chromium 0.344 0.2 N7300 MCE 09/10/2002 AJB Cobalt <0.100 0.1 N7300 MCE 09/10/2002 AJB Copper <0.200 0.2 N7300 MCE 09/10/2002 AJB Iron <2.00 2 N7300 MCE G9/10/2002 AJB I Lead <0.300 0.3 N7300 MCE 09/10/2002 AJB Magnesium <1.30 13 N7300 MCE 09/10/2002 AJB Manganese <0.300 0.3 N7300 MCE 09/10/2002 AJB Molybdenum <1.00 1 N7300 MCE 09/10/2002 AJB Nickel <0.200 0.2 N7300 MCE 09/10/2002 AJB Zinc <0.500 0.5 N7300 MCE 09/10/2002 AJB

(a) Analysis indicates possible breaklhrt ugh. back section result is greater than 0% of the from section result.

General Notes: <: Less than the indicated limit of detection (LOD). —: Information not available or not appi cable. Back sections were checked and showed no significant breakthrough.

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NYC-WTC_000199339