80 JOHN STREET; Block: 68 Lot: 33 BIN: 1001115 19-25 Gold Street, 25-27 Platt Street

NYC 9/11 Public Portal Document

' JLC ENVIRONMENTAL CONSULTANTS, INC. York, New York 10003 200 Park Avenue South, Suite 1106, New Phone: (212) 420-8119 Fax: (212) 420-6092 Project No.: 01-2240 Analyte: Airborn Particulate WSA Management ELAP Lab Code: 11029 Date Collected: 12!13/01 100 Ring Road West NIOSH and AIHA Lab Code: 100273 Date Received: 12/13/01 Garden City, NY 11530 NVLAP Lab Code: 101953 Date Analyzed: 12/13/01

Site: 80 John Street, New York, NY

Summary of Analytical Results - Particulates (Dust) PLOD * CONCENTRATION VOLUME SAMPLE # LOCATION I DESCRIPTION (mg/m3) (mgfm 3 ) LAB #

120 1.108 East 08 Ambient/ 12th Floor/ Apartment pll ;North Room/ South Wall Near Door 224008

<0.01! mg/ Filter 09 FIELD BLANK 224009

<0.01/ mg/ Filter 10 FIELD BLANK 224010

is 0.2 mg/ air volume (I) " PLOD = Performance limit of detection, which Sample AnaIyi$bY Analytical Balance

Method of Sample Prrearation and Analysis Occupational Safety and Health (NIOSH) Method 0500 02/15/84. accordance with the National Institute of All samples were prepared and analyzed in

Instrumentation Denver A-2000S, with resolution at 0.01 mg.

Gulam Machhiwala Laboratory Director total Nuisance Dust is 5 mg/m3 OSHA Permissible Exposure Limit (PEL) for

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NYC-WTC 000108639