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 Anatyte: 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 #: 0110A792 SUMMARY OF ANALYTICAL RESULTS Site: 21 West Street, New York, NY L

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

019. Ambient! 6th Floor/ Apt. 6M At the North Section 120 1846 4/100 0.001<LOD ot me Apt. A 8060

020 Ambient/ 6th Floor/ Hallway Between Apt. 6E and 120 1846 16/100 0.004 18-October 6F A 8061

021 Ambient/ 3rd Floor/ Apt. 3F/ At the North Section 120 1846 2/100 <0.001<LOD 18-October of the Living Room A 8062

022 Ambient/ 3rd Floor/ Hallway/ At the Entrance to 120 1846 3/100 <0.001<LOD 18-October the Laundry Room A 8063

023 Ambient/ Lobby/ At the Entrance to the Mail Room 120 1846 3/100 <0.001<LOD 18-October A 8064

024 Ambient/ Lobby/ At the Entrance to the Clock 120 1846 14/100 0.004 18-October Room A 8065

Sample Analysis by: <LOD = Less than limit of detection which Is 5.5 Fibers/ 100 Fields VOIDI = 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: ~~ ,. ~(\ a U am ac Iwa a Olympus PCM Model SH-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 4 of 5

NYC-WTC 000094645