NYC-WTC_000232037

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, 20lh Floor Date Received: 12/17/2004 New York, NY 10006 Date Analyzed: 12/17/2004 Collected By: Rotimi Adeola Job Location: 130 Liberty Street Collected: 12/15/2004 6:38 Lab ID: 0013507-005 Matrix: AIR Field ID: 27639-11 Location: Washington Street/

Parameter Start End Flow Volume Result Units MDL MCL Flag Barium 6:49 6:48 4 5756 <0.026 |rg/m3 0.026 500 Beryllium 6:49 6:48 4 5756 <0.017 Hg/m3 0.017 1.0 Cadmium 6:49 6:48 4 5756 <0.017 Ug/m3 0.017 2.5 Chromium 6:49 6:48 4 5756 <0.103 |rg/m3 0.103 500 Copper 6:49 6:48 4 5756 <0.175 |rg/m3 0.175 500 Lead 6:49 6:48 4 5756 <0.094 |rg/m3 0.094 30 Manganese 6:49 6:48 4 5756 <0.026 Pg/in3 0.026 1000 Nickel 6:49 6:48 4 5756 <0.060 |rg/m3 0.060 500 Zinc 6:49 6:48 4 5756 0.096 Hg/m3 0.068 2500

Lab ID: 0013507-006 Matrix: AIR Field ID: 27639-B Location: Field Blank

Parameter Start End Flow Volume Result Units MDL MCE 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 ng 0.60 500 Copper 0 0 <1.0 ug 1.0 500 Lead 0 0 <0.55 ug 0.55 30 Manganese 0 0 <0.15 ug 0.15 1000 Nickel 0 0 <0.35 ug 0.35 500 Zinc 0 0 <0.40 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_DEP_WORBY_CANNATA_SUBP_000071682

NYC-WTC_000232039