NYC-WTC_000220455

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.: 01-2089004 Rose Associates Inc. ELAP Lab Code: 11029 Analyte: FIBERS 200 Madison Ave. Sth Floor NIOSH and AIHA Lab Code: 100273 Date Received: 10/25/2001 New York, NY 10016 NVLAP Lab Code: 101953 Date Analyzed: 10/25/2001 Batch#; 0110A824 SUMMARY OF ANALYTICAL RESULTS Site: 21 West Street, New York, NY

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

013 Ambient/11th Floor/ Apt. 11C/ At the North 120 1846 6/100 0.002 24-October Section of the Living Room A 8316

014 Ambient/11th Floor/ Hallway Between Apt. 11H 120 1846 4/100 0.001 <LOD 24-Ootober and 11J A 8317

015 Ambient/ 9th Floor/ Apt. 9N/ At the North Section 120 1846 3/100 <0.001 <LOD 24-October of the Living Room A 8318

016 Ambient/ 9th Floor/ Hallway Between Apt. 9H and 120 1846 4/100 O.OOKLOD 24-October 9J A 8319

017 Ambient/ 8th Floor/ Apt. 8E/ At the North Section 120 1846 3/100 <0.001 <LOD 24-October of the Living Room A 8320

018 Ambient/ 8th Floor/ Hallway Between Apt. 8H and 120 1846 4/100 O.OOKLOD 24-October 8J A 8321

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. Olympus PCM Model BH-2 with Walton-Beckett Graticule (100um field diameter). Laboratory Director Report Date: November 8, 2001 JLC is responsible for only the fiber counts within the limitations of the method described as NIOSH 7400. Among other limitations, this metho 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 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 3 of 5

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NYC-WTC_000220457