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NYC-WTC_000209826

Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000209826–000209834
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NYC 9/11 Public Portal Document

AMBIENT GROUP, INC. 10 MORRIS AVENUE GLEN COVE, NY 11542

DUST CHARACTERIZATION LABORATORY DATA REPORT

PROJECT ID: 211379 DATE COLLECTED; 10/14/01 CLIENT: BOSTON PROPERTIES DATE RECEIVED: 10/14/01 LOCATION: 90 CHURCH STREET, 12TH FLOOR DATE ANALYZED: 10/14/01 TECHNICIAN; PETER SCHORK

FIELD ID SAMPLE PERCENT OF LABORATORY ID DESCRIPTION CONSTITUENTS SAMPLE •* ' II' 12-A9 FIBER GLASS 25.0% DB2860 LOCATION #9-SLIDE CEMENT DUST 5.0% GRAVEL ROAD DUST 25.0% CARBON PARTICLES 10.0% . DECAYED ORGANIC MATTER 35.0% TOTAL 100.0%

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O m Signed for Ambient Group Inc. by,

o J] ro TAREK FATA

> z z ND « None Detected, NA > Not Analyzed, There are two (2) types of dust sample submined for analysis Settled ■ Samples submitted on tape/bulk. Airborne • Samples submitted > in Air-O-Cell Cassettes. All results disclosed in this report relate only to the items tested. No reproduction of ail or any portion of this report shall occur without written approval of Ambient Group Inc. Unless otherwise directed by the Client, Ambient Group (nc. will retain the samples listed in this report for five (5) days, after which time they may be disposed of in accordance with applicable regulations. c DO

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NYC-WTC_000209834

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NYC-WTC_000209834Source: NYC Law Department, mirrored locally

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