NYC-WTC_000234534

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: 12/29/2004 New York, NY 10006 Date Analyzed: 12/29/2004 Collected By: John Boadi Job Location: 130 Liberty Street Collected: 12/27/2004 6:15 Pb Zn in Blank

Lab ID: 0013645-003 Matrix: AIR Field ID: 27698-9 Location: Greenwich Street

Parameter Start End Flow Volume Result Units MDL MCL Fla& Barium 6:15 6:24 3.5 5071.5 0.690 ng/m3 0.026 500 Beryllium 6:15 6:24 3.5 5071.5 <0.017 ng/m3 0.017 1.0 Cadmium 6:15 6:24 3.5 5071.5 <0.017 ng/m3 0.017 2.5 Chromium 6:15 6:24 3.5 5071.5 <0.103 ng/m3 0.103 500 Copper 6:15 6:24 3.5 5071.5 0.414 ng/m3 0.175 500 Lead 6:15 6:24 3.5 5071.5 <0.094 ng/m3 0.094 30 Manganese 6:15 6:24 3.5 5071.5 <0.026 ng/m3 0.026 1000 Nickel 6:15 6:24 3.5 5071.5 0.266 ng/m3 0.060 500 Zinc 6:15 6:24 3.5 5071.5 <0.069 ng/m3 0.069 2500

Lab ID: 0013645-004 Matrix: AIR Field ID: 27698-10 Location: Liberty Street

Parameter Start End Blow Volume Result Units MDL MCL Flaa Barium 6:22 6:32 3.5 5075 <0.026 Hg/m3 0.026 500 Beryllium 6:22 6:32 3.5 5075 <0.017 Hg/m3 0.017 1.0 Cadmium 6:32 3.5 5075 <0.017 ng/m3 0.017 2.5 Chromium 6:22 6:32 3.5 5075 <0.103 ng/m3 0.103 500 Copper 6:22 6:32 3.5 5075 <0.175 ng/m3 0.175 500 Lead 6:22 6:32 3.5 5075 <0.094 Hg/m3 0.094 30 Manganese 6:22 6:32 3.5 5075 <0.026 Hg/m3 0.026 1000 Nickel 6:22 6:32 3.5 5075 <0.060 ng/m3 0.060 500 Zinc 6:22 6:32 3.5 5075 <0.069 ng/m3 0.069 2500

MDL = Minimum Detection Limit Page 2 of 3 MCL = Maximum Contaminant Level > VICI = Exceeds Maximum Contaminant t,evel

CITY_21MC100_003216825

NYC-WTC_000234535