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

019 Ambient/ 5th Floor/ In Room 5N/ At the Bedroom 90 1385 6/100 0.002 12-October Section Beside the Window A 7531

020 Ambient/ 5th Floor/ Corridor/ At the North Section 90 1385 4/100 0.001 12-October of the Corridor A 7532

021 Ambient/ In the Lobby/ Next to the Mailroom 90 1385 3/100 0.001 12-October A 7533

022 Ambient/ In the Lobby/ Next to the Gym 90 1385 4/100 0.001 12-October A 7534

023 Ambient/ At the North Section of the PH Corridor 90 1385 5/100 0.002 12-October A 7535

024 Ambient/ At the South Section of the PH Room D 90 1385 4/100 0.001 12-October A 7536

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: — ~V, p1otJ J,, A-'\. '\. Olympus PCM Model BH-2 with Walton-Beckett Graticule (100um field diameter). L a am aC iwa a Laboratory 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 4 of 5

NYC-WTC 000094660