Chain of custody form, 21 West Street, Nov 2001

NYC 9/11 Public Portal Document FEB-28-2002 THU 1108 AM CLOSINGS 0 ROSE FAX NO. 212 210 6724 P. 18/42

' K JLC: ENVIRONMENTAL WNSUL IAN 1S, INC. • 200 Park Avenue South, Suite 1001, New York, Now York 10003 Phone:(212)420-8119 Fax:(212)420-6092 Project Na: 01-2089004 Rose At<sor..iates Inc. ELtP Lab Code: 11029 Analyte: FIBERS NIO3H and r{IHA Lab Code: 100273 Date I~ocoivcd: 1tr12512001 ~uv M9tilson Ave. 6th Floor Nnw Y0r}r, NY 10016 NVLAP Lab Code: 101653 Date Analyzed: 10/25/2001 eatth# 0110A824 SUMMARY OF ANALYTICAL RESULTS Site: 21 West Sfre t, New York, NY

8AMPt.E # C01I.L CTED DESCRIPTiON I LOCATION TIME(min) VOLUME(!) FIB/FIELD RESULTS(ficc) Yf 145M

Q19 Ambient! 6th Floor! Apt. 6M1 At the North Section 120 1846 31100 rQ.QQ14.OD 2h.ck Lobar of the Living Room A&2

0,g0 , Ambient! 6th Floor! Hallway Between Apt. SE end 120 1846 3/100 <0A01CLOD 24*.Qclobar 6F A 0323

021 Ambient/ 3rd Floor! Apt. 3F At the North Section 120 1846 41100 0.0171 <LOD 24.Oetolaer of the Living Room A 9324

02? Arnljietitl 3rd FluLmI Hallway at the Entrance Of 120 1846 3/100 -10.001 WLQ, . ,'14-0ctober the Laundry Room

623 Ambient! Lobby! At the Entrance to the Clock 120 1846 21100 <0.001 'LOO 24.0dober Room A 9326

024 Ambient! Lobby! At the Entrance to the Mail Room 120 1846 3/100 <O.OQ LO 24-0clobor A 0:27

• Samf►t2,Analyslk._by: <LOtD = Loss than limit of detection which Is 5.5 Fibers/ 100 Fields VOtD1 - H.C.P. ( High Concentration of Particles► • r f'osiUvo Phase Contrrist Microscopy (PCM) VOID2 = Overloaded r't br jrl{f t}LSggxptg )?rcaparafion pit,i Mniv : A l samplea analyzed In acc ordant:tr with the NIOSH 7400 Method using "A" Counting Rules. issue 2, August 1994 6rgtfUnikltt~tlt~lY: ~~p, ~w. 1.l»A` ~•-~ La bor acOirec tto • t#ym flea f~CM Model Bt-2 with Wait0n A ocket t Gratcule (bourn field diameter~. Laboratory birc~ctor

Report Date: November 8, 2001 JLC is resaon,ible for only tl'io libel counts wlt lii trio limitations of the method described as NiOE117400. Among other limitations, this metho gives nniy nn Ind r:x of rilrtu,rna fibers and provides only an estimate of asbestos concentration. My and all claims arising out of JiLC's analyal: these sarnples are limited In recovery to the cost of analyzing samples. JLC accepts no other liability and the chant agrees to seek no costs b+ th6 above. Pege4of5

NYC-WTC 000094610