NYC-WTC_000231895

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: 12/21/2004 New York, NY 10006 Date Analyzed: 12/21/2004 Collected By: Rotimi Adeola Job Location: 130 Liberty Street Collected: 12/18/2004 6:21 Cu Pb Zn in Blank

Lab ID: 0013550-003 Matrix: AIR Field ID: 27654-9 Location: Greenwich Street

Parameter Start End Flow Volume Result Units MDL MCL Flag Barium 6:21 6:16 4 5740 0.052 |rg/m3 0.026 500 Beryllium 6:21 6:16 4 5740 <0.017 Hg/m3 0.017 1.0 Cadmium 6:21 6:16 4 5740 <0.017 irg/m3 0.017 2.5 Chromium 6:21 6:16 4 5740 <0.103 |rg/m3 0.103 500 Copper 6:21 6:16 4 5740 <0.175 |rg/m3 0.175 500 Lead 6:21 6:16 4 5740 <0.094 |rg/m3 0.094 30 Manganese 6:21 6:16 4 5740 <0.026 Pg/in3 0.020 1000 Nickel 6:21 6:16 4 5740 <0.060 |rg/m3 0.060 500 Zinc 6:21 6:16 4 5740 0.157 Rg/ni3 0.069 2500

Lab ID: 0013550-004 Matrix: AIR Field ID: 27654-10 Location: Liberty Street

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 6:30 6:23 4 5732 0.044 irg/m3 0.026 500 Beryllium 6:30 6:23 4 5732 <0.017 |rg/m3 0.017 1.0 Cadmium 6:30 6:23 4 5732 <0.017 |rg/m3 0.017 2.5 Chromium 6:30 6:23 4 5732 <0.103 |rg/m3 0.103 500 Copper 6:30 6:23 4 5732 0.174 Rg/in3 0.175 500 Lead 6:30 6:23 4 5732 <0.094 |rg/m3 0.094 30 Manganese 6:30 6:23 4 5732 <0.026 Hg/m3 0.026 1000 Nickel 6:30 6:23 4 5732 <0.060 irg/m3 0.060 500 Zinc 6:30 6:23 4 5732 0.087 |rg/m3 0.069 2500

MDL = Minimum Detection Limit Page 5 of 9 MCL = Maximum Contaminant Level > MCL = Exceeds Maximum Contaminant Level

CITY_DEP_WORBY_CANNATA_SUBP_000052939

NYC-WTC_000231899