Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

Li ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP k: 5762 - :0/25/01 Filter Type MCE 25 mm Operator Lab Sample No, 62237

I Client Spl. No. 23 Instrument I.D. EM 10 CRX

Screen Magnification 16,400X Filter Area 3 5 mm2 Grid I.D.

(GO) Area 0.01124 mm2 3 , qg Disk No. Comments

( 4.721 Struct Corspd to 70 s/mm"2

I No. GO to be Analyzed 6 Acc. Voltage 80 kV

Structure Type Length I.D. of Structure N or t/ G0. I Structure 11n Cnn.rd. No. F A C M 5um Chrys.1 Amphibole Nonasb. Ambig./ND jElEemenLs

I I I I I I I Li JJ

Identify all structures using SOS Check diffraction for asbestos Photo No. (from I in 5 asbestos- 1 structures tie to 70u/11m (1st 4) containing aampicul .. Struct. = > 0.5um & > 5:1 Aspect Ratio cl(M pa rticu l t overlapped or folded <10% particulate coverage >50% coverage Tota unfolded or overlapped grid squares N. Not Observed (SOS spectrum or diffraction pattern) at least 20 ✓ <5% hales or opaque areas Positive diffraction pattern properties conforming portion to laboratory identification criteria observed. filter Chrysotile Per chrya;Ulr. a.730m ■singline for (020) reflections. portion a.53nm ■pacing for the layer repent. streaking r of (110) and (190) ranestions. lo Portion1of altar Amphibole For amphibole.: 0A3am layer Ilse repeal. and aPPraa• 3.5 ratio of non-tslned layer line spat epaalng to 'samlaWon layer line repeat distance (0.03nm~ EDS spectrum conforming to laboratory Ambiguous OLES IdenUfieaUon criteria observed. ite F. Single Fiber (1-3 Intersections = 1-3 fibers) B= Bundle (>3 fibers <1 fi ber diameter apart) 25mm filter olite Non —asbestos C= Cluster (>3 in tersections) 1 Ji 1 Stiles yllite M= Matrix >90 ■/c.a. or In lit 4 0.0. ; m" lite' te Non -Identified NSD= No Structures Detected Actinolite

NYC-WTC 000104114