NYC-WTC_000233668

NYC 9/11 Public Portal Document

AMBIENT GROUP, INC. 10 Morris Avenue, Glen Cove, NY 11542 Phone: (516) 671-2370 - Fax: (516) 609-8271 NY ELAP ID#10865

LMDC Air Metals Profile

Client: Lower Manhattan Development Corp. Job Number: 2043 Address: One Liberty Plaza, 20th Floor Date Received: 01/14/2005 New York, NY 10006 Date Analyzed: 01/14/2005 Collected By: Ike Onyenyili Job Location: 130 Liberty Street Collected: 01/12/2005 6:19 Zn in Blank

Lab ID: 0013890-003 Matrix: AIR Field ID: 25295-9 Location: Greenwich Street

Parameter Start End Blow Volume Result Units MDL MCL Flaa Barium 6:19 6:21 4 5768 0.052 9g''m3 0.026 500 Beryllium 6:19 6:21 4 5768 <0.017 9g/m3 0.017 1.0 Cadmium 6:19 6:21 4 5768 <0.017 Hg/m3 0.017 2.5 Chromium 6:19 6:21 4 5768 <0.105 pg/m3 0.105 500 Copper 6:19 6:21 4 5768 <0.175 pg/m3 0.175 500 Lead 6:19 6:21 4 5768 <0.017 9g/m3 0.017 30 Manganese 6:19 6:21 4 5768 <0.026 9g/m3 0.026 1000 Nickel 6:19 6:21 4 5768 <0.061 Hg/m3 0.061 500 Zinc 6:19 6:21 4 5768 <0.069 ng/ni3 0.069 2500

Lab ID: 0013890-004 Matrix: AIR Field ID: 25295-10 Location: Liberty Street

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 6:27 6:30 4 5772 0.052 pg/mj 0.026 500 Beryllium 6:27 6:30 4 5772 <0.017 Hg/m3 0.017 1.0 Cadmium 6:27 6:30 4 5772 <0.017 pg/m3 0.017 2.5 Chromium 6:27 6:30 4 5772 <0.103 Pg/m3 0.103 500 Copper 6:27 6:30 4 5772 <0.175 9g/m3 0.175 500 Lead 6:27 6:30 4 5772 <0.017 Pg/m3 0.017 30 Manganese 6:27 6:30 4 5772 <0.026 ng/in3 0.026 1000 Nickel 6:27 6:30 4 5772 <0.060 pg/m3 0.060 500 Zinc 6:27 6:30 4 5772 <0.069 9g/m3 0.069 2500

MDL = Minimum Detection Limit Page 2 of 3 MCL = Maximum Contaminant Level > MCL = Exceeds Maximum Contaminant Level

CITY_21MC100_0 07131061

NYC-WTC_000233669