Chain of custody form, 21 West Street, Nov 2001

NYC 9/11 Public Portal Document

JLC ENVIRONMENTAL CONSULTANTS, INC. 200 Park Avenue South, Suite 1001, New York, New York 10003 Phone: (212) 420-8119 Fax: (212) 420-6092 Project No.: 01-2089002 Rose Associates Inc. ELAP Lab Code: 11029 Analyte: FIBERS 200 Madison Ave. 5th Floor NIOSH and AIHA Lab Code: 100273 Date Received: 10/15/01 New York, NY 10016 NVLAP Lab Code: 101953 Date Analyzed: 10/16/01 Batch #: 011OA741 SUMMARY OF ANALYTICAL RESULTS Site: 21 West Street, New York, NY

SAMPLE # COLLECTED DESCRIPTION I LOCATION TIME(min) VOLUME(1) FIB/FIELD RESULTS(f/cc) LAB #

007 Ambient/ 15th Floor/ Corridor/ At the North 90 1385 5/100 0.002 12-October Section of the Corridor A 7519

008 Ambient/ 15th Floor/ At the South Section of the 90 1385 6/100 0.002 12-October Corridor A 7520

009 Ambient/ 10th Floor/ At the North Section of the 90 1385 7/100 0.002 12-October Hallway A 7521

010 Ambient/ 10th Floor/ At the South Section of the 90 1385 6/100 0.002 12-October Hallway A 7522

011 Ambient/ 9th Floor! At the North Section of the 90 1385 6/100 0.002 12-October Hallway A 7523

012 Ambient/ 9th Floor/ At the South Section of the 90 1385 5!100 0.002 12-October Hallway A 7524

Sample Analysis by: <LOD = Less than limit of detection which is 5.5 Fibers/ 100 Fields Positive Phase Contrast Microscopy (PCM) VOID1 = H.C.P. ( High Concentration of Particles) VOID2 = Overloaded Method of Sample Preparation and Analysis: All samples analyzed in accordance with the NIOSH 7400 Method using "A" Counting Rules. Issue 2, August 1994 Instrumentation: C" , )27afh y, `~, Olympus PCM Model BH-2 with Walton-Beckett Graticule (100um field diameter). am ac Iwa a L aboratory Director

Report Date: October 16, 2001 JLC is responsible for only the fiber counts within the limitations of the method described as NIOSH 7400. Among other limitations, this meth gives only an index of airborne fibers and provides only an estimate of asbestos concentration. Any and all claims arising out of JLC's analysi these samples are limited in recovery to the cost of analyzing samples. JLC accepts no other liability and the client agrees to seek no costs b the above. Page 2 of 5

NYC-WTC 000094658