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.: 01-2089003 Rose Associates Inc. ELAP Lab Code: 11029 Analyte: FIBERS 200 Madison Ave. 5th Floor NIOSH and AIHA Lab Code: 100273 Date Received: 10/19/2001 New York, NY 10016 NVLAP Lab Code: 101953 Date Analyzed: 10/19/2001 Batch#: 011OA792 SUMMARY OF ANALYTICAL RESULTS Site: 21 West Street, New York, NY

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

007 Ambient/ 20th Floor/ Apt. 20B/ At the North 120 1846 2/100 <0.001<LOD l5-Outu1,er ectlon of the Living A 8048

008 Ambient/ 20th Floor/ Hallway Between Apt. 20 G 120 1846 4/100 0.001<LOD 18-October and 20 H A 8049

009 Ambient/ 18th Floor/ Apt. 18E/ At the North 120 1846 3/100 <0.001<LOD 18-October Section of the Living Room A 8050

010 Ambient/ 18th Floor/ Hallway/ Between Apt. 181 120 1846 4/100 0.001<LOD 18-October and 18J A 8051

011 Ambient/ 14th Floor/Apt.14G1 At the North 120 1846 5/100 0.001<LOD 18-October Section of the Living Room A 8052

012 Ambient/ 14th Floor! Hallway Between Apt. 14H 120 1846 121100 <0.003 18-October and 14J A 8053

Sample Analysis by: <LOD = Less than limit of detection which is 5.5 Fibers/ 100 Fields VOID1 = H.C.P. ( High Concentration of Particles) Positive Phase Contrast Microscopy (PCM) 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: ua acnniwa a Olympus PCM Model BH-2 with Walton-Beckett Graticule (100um field diameter). Laboratory Director Report Date: October 23, 2001 JLC Is responsible for only the fiber counts within the limitations of the method described as NIOSH 7400. Among other limitations, this method gives only an Index of airborne fibers and provides only an estimate of asbestos concentration. Any and all claims arising out of JLC's analysis of 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 beyond the above. Page 2 of 5

NYC-WTC 000094643