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: John Boadi Job Location: 130 Liberty Street Collected: 12/19/2004 6:16 Ba Pb Zn in lank

Lab ID: 0013551-003 Matrix: AIR Field ID: 27659-9 Location: Greenwich Street

Parameter Start End Flow Volume Result Units MDL MCL Flag Barium 6:16 6:16 4 5760 0.052 Rg/ni3 0.026 500 Beryllium 6:16 6:16 4 5760 <0.017 Hg/m3 0.017 1.0 Cadmium 6:16 6:16 4 5760 <0.017 Ug/m3 0.017 2.5 Chromium 6:16 6:16 4 5760 <0.103 Rg/ni3 0.103 500 Copper 6:16 6:16 4 5760 <0.175 |rg/m3 0.175 500 Lead 6:16 6:16 4 5760 <0.094 pg/m3 0.094 30 Manganese 6:16 6:16 4 5760 <0.026 Pg/in3 0.026 1000 Nickel 6:16 6:16 4 5760 <0.060 |rg/m3 0.060 500 Zinc 6:16 6:16 4 5760 <0.069 lig/m3 0.069 2500

Lab ID: 0013551-004 Matrix: AIR Field ID: 27659-10 Location: Liberty Street

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 6:23 6:26 4 5772 <0.026 Ug/mS 0.026 500 Beryllium 6:23 6:26 4 5772 <0.017 |rg/m3 0.017 1.0 Cadmium 6:23 6:26 4 5772 <0.017 |rg/m3 0.017 2.5 Chromium 6:23 6:26 4 5772 <0.103 pg/m3 0.103 500 Copper 6:23 6:26 4 5772 <0.175 Pg/in3 0.175 500 Lead 6:23 6:26 4 5772 <0.094 |rg/m3 0.094 30 Manganese 6:23 6:26 4 5772 <0.026 Hg/in3 0.026 1000 Nickel 6:23 6:26 4 5772 <0.060 Ug/m3 0.060 500 Zinc 6:23 6:26 4 5772 <0.069 |rg/m3 0.069 2500

MDL = Minimum Detection Limit Page 8 of 9 MCL = Maximum Contaminant Level > MCL = Exceeds Maximum Contaminant Level

CITY_DEP_WORBY_CANNATA_SUBP_000052942

NYC-WTC_000231902