NYC-WTC_000234020

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: 01/20/2005 New York, NY 10006 Date Analyzed: 01/20/2005 Collected By: Rotimi Adeola Job Location: 130 Liberty Street Collected: 01/18/2005 6:47 Zn in Blank

Lab ID: 0013952-005 Matrix: AIR Field ID: 26322-24 Location: Washington Street/

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 6:47 6:37 4 5720 0.035 ng/mi 0.026 500 Beryllium 6:47 6:37 4 5720 <0.017 ng/in3 0.017 1.0 Cadmium 6:47 6:37 4 5720 <0.017 Hg/m3 0.017 2.5 Chromium 6:47 6:37 4 5720 <0.105 pg/m3 0.105 500 Copper 6:47 6:37 4 5720 <0.175 pg/m3 0.175 500 Lead 6:47 6:37 4 5720 0.070 ng/m3 0.017 30 Manganese 6:47 6:37 4 5720 <0.026 ng/m3 0.026 1000 Nickel 6:47 6:37 4 5720 <0.061 Hg/m3 0.061 500 Zinc 6:47 6:37 4 5720 <0.070 ng/ni3 0.069 2500

Lab ID: 0013952-006 Matrix: AIR Field ID: 26322-B Location: Field Blank

Parameter Start End Flow Volume Result Units MDL MCL Flaa Barium 0 0 <0.15 ug 0.15 500 Beryllium 0 0 <0.10 ug 0.10 1.0 Cadmium 0 0 <0.10 ug 0.10 2.5 Chromium 0 0 <0.60 ug 0.60 500 Copper 0 0 <1.0 ug 1.0 500 Lead 0 0 <0.10 ug 0.10 30 Manganese 0 0 <0.15 ug 0.15 1000 Nickel 0 0 <0.35 ug 0.35 500 Zinc 0 0 5.8 ug 0.40 2500

SIGNED FOR AMBIENT GROUP, INC. BY:

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

CITY_21MC100_003221244

NYC-WTC_000234022