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

NYC 9/11 Public Portal Document

' =NVIRONMENTAL CONSULTAN i INC • 200E .., k Avenue South, Suite 1106, New York, New Y urk 10003 Phone: (212) 420-8119 Fax: (212) 420-6092 Project No.: 01-2214 WSA Management Analyte: Alrbom Particulate 100 Ring Road West ELAP Lab Code: 11029 Date Collected: 11/16/01 Garden City, NY 11530 NIOSH and AIHA Lab Code: 100273 Date Received: 11/16/01 NVLAP Lab Code: 101953 11/16/01 Date Analyzed:

Site: 80 John Street, New York, NY

Summary of Analytical Results SAMPLE # LOCATION I DESCRIPTION VOLUME PLOD " CONCENTRATION (mg / m3) (mg / m3 ) LAB #

1 Ambient/ 8th Floor/ Apartment; Pil South Section/ 120 0.58 1116-01 Bedroom Door (On West)

2 Ambient/ 8th Floor/ Apartment pii,North Section/ 120 0.42 1116-02 Living Room/ North West Door

3 Ambient/ 8th Floor/ Corridor/ North End of Corridor 120 0.92 1116-03 with North Wall

4 Ambient/ 8th Floor/ Corridor/ South End of Corridor 120 0.75 1116-04 with South Wall

5 Ambient/ 22nd Floor/ Apartment11Pi_._ _3outh Side 120 0.50 1116-05 Living Room! In the Middle of South Wall

6 Ambient/ 22nd Floor/ Apartment. P11 ;North East 120 0.08 1116-06 Room/ On West Side Near Doot-------"

7 FIELD BLANK <0.01/ Filter 1116-07

PLOD = Performance limit of detection, which Is 0.2 mg/ air volume (I). Sample Analysis by: Analytical Balance Method of Sample Preparation and Analysis All samples were prepared and analyzed in accordance with the National Institute of Occupational Safety and Health (NIOSH) Method 0500 02/15/84.

Instrumentation* Denver A-200DS, with resolution at 0.01 mg.

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

Page 1 of 2

NYC-WTC 000108663