Analytical results for air samples, March 2002

NYC 9/11 Public Portal Document

Mar 11 02 OS:IBa PSC Hnalbtical Services eiO3219BG7 p-9

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING ■EPAINVLAP101262-0 •NY00H/NELAC1DSO3 ■NJ DEP PA02O ■ AIHA ACCREDITATION ND. 100439 •PADEP 06.353 • CT OPH PH-0238 •NO DENR599

ANALYTICAL SERVICES Analytical Results for ATC Associates WorkOrder: R02030045 Client Reference: 19125-0246

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

Client ID: M3 ATC-0227-STY Lab ID: -OSA Date Sampled; 2/27/02 Matrix: Filter Air Vol.(L): 960 Aluminum 1.55 0.00161 1 N7300 MCE 03/08/2002 TH Cadmium <0.200 <0.000208 0.2 N7300 MCE 03/08/2002 TH Chromium - 0.626 0.000652 0.2 N730O MCE 03/08/2002 TH Cobalt <0.100 <0.000104 0.1 N7300 MCE 03/08/2002 TH Copper <0.200 <0.000208 0.2 N7300 MCE 03/08/2002 TH Iron <2,00 <0.00208 2 N7300 MCE 03/08/2002 TH Magnesium <1.30 <0.00135 1.3 N7300 MCE 03/08/2002 TH Manganese <0.300 <0.000312 0.3 N7300 MCE 03/08/2002 TH Molybdenum <1.00 <0.00104 1 N7300 MCE 03/08/2002 TH Nickel <0.200 <0.000208 0.2 N7300 MCE 03/08/2002 TH Zinc <0.500 <0.000521 0.5 N7300 MCE 03/08/2002 TH

Client ID: M4 ATC-0227-STy Lab ID; -04A Date Sampled: 2/27/02 Matrix: Filter Air Vol.(L): NA Aluminum 1.63 1 N7300 MCE 03/08/2002 TH Cadmium <0.200 0.2 N7300 MCE 03/08/2002 TH Chromium 0.486 0.2 N7300 MCE 03/08/2002 TH Cobalt <0.100 0.1 N7300 MCE 03/08/2002 TH Copper <0.200 0.2 N7300 MCE 03/08/2002 TH Iron <2.00 2 N7300 MCE 03/06/2002 TH Magnesium <1.30 1.3 N7300 MCE 03/08/2002 TH Manganese <0.300 0.3 N7300 MCE 03/08/2002 TH Molybdenum <1.00 1 N7300 MCE 03/08/2002 TH Nickel <0.200 0.2 N7300 MCE 03/08/2002 TH Zinc <0.500 0.5 N730O MCE 03/08/2002 TH

(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.

Page 2 of 2

CONFIDENTIAL, CITY_21MC100_003429339 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175042