NYC-WTC_000233521

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: 01/18/2005 New York, NY 10006 Date Analyzed: 01/18/2005 Collected By: Rotimi Adeola Job Location: 130 Liberty Street Collected: 01/15/2005 6:18 Zn in Blank

Lab ID: 0013917-001 Matrix: AIR Field ID: 26306-7 Location: Washington Street/

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 6:18 6:10 4 5728 0.052 ng''m3 0.026 500 Beryllium 6:18 6:10 4 5728 <0.017 ng/m3 0.017 1.0 Cadmium 6:18 6:10 4 5728 <0.017 Hg/m3 0.017 2.5 Chromium 6:18 6:10 4 5728 <0.104 pg/m3 0.104 500 Copper 6:18 6:10 4 5728 <0.174 pg/m3 0.174 500 Lead 6:18 6:10 4 5728 0.070 ng/m3 0.017 30 Manganese 6:18 6:10 4 5728 <0.026 ng/m3 0.026 1000 Nickel 6:18 6:10 4 5728 <0.061 Hg/m3 0.061 500 Zinc 6:18 6:10 4 5728 <0.069 ng/ni3 0.069 2500

Lab ID: 0013917-002 Matrix: AIR Field ID: 26306-8 Location: Albany Street/

Parameter Start End Blow Volume Result Units MDL MCL Flaa Barium 6:26 6:15 4 5716 0.061 pg/mj 0.026 500 Beryllium 6:26 6:15 4 5716 <0.017 Hg/m3 0.017 1.0 Cadmium 6:26 6:15 4 5716 <0.017 pg/m3 0.017 2.5 Chromium 6:26 6:15 4 5716 <0.103 Pg/m3 0.103 500 Copper 6:26 6:15 4 5716 <0.175 ng/m3 0.175 500 Lead 6:26 6:15 4 5716 0.035 Pg/m3 0.017 30 Manganese 6:26 6:15 4 5716 <0.026 ng/in3 0.026 1000 Nickel 6:26 6:15 4 5716 <0.060 pg/m3 0.060 500 Zinc 6:26 6:15 4 5716 <0.069 ng/m3 0.069 2500

MUL = Minimum Detection Limit Page 1 of 6 MCL = Maximum Contaminant Level > MCL = Exceeds Maximum Contaminant Level

CITY_21MC100_003221182

NYC-WTC_000233521