Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

7 ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP p S702 - 3'25;01 Operator Filter Type MCE 25 mm

I Lab Sample No. 62226 Filter Area 385 mm2 Client Spl. No. 12 Disk No. Grid I.D. Instrument I.D. EM 10 CRX 0.01124 mm"2 Comments (GO) Area Screen Magnification 16,400X 4.721 Struct. Corsnd. to 70 s/mm ..i. sr kV No. GO to be Analyzed 6

EDS Structure type Length I.D. of Structure Nor,/ (Nonasb. GO. Structure 3 5um Chr s. Amphibole Nonasb. Ambig./ND Elements

I No Coord. G ' No. F B C M <~5 um

s yi — :—

I I

I E '_________ I I 'J

I CRoto no. lirum . ... containing samples) ---- ------- - u _.'. t...w. ...ln. E03 Grid acceptance: Check diffraction for asbestos structures LL to "/ua mm t... +i Store all unrepaatnd spect r a

undiaslatee tar, overlapped e or folds Total Struct. = ) O.5um & > 5:1 Aspect Ratio <10%% <10% particulate coverage >50% coveragesquares or overlapped grid diffraction pattern) at least 20 unfolded N= Not Observed (gOS spectrum or <SS oles or opaque areas properties conforming ~= Positive diffraction pattern Unused portion to laboratory Identification criteria observed. of filter Chrysotile 0.'73am sped for strew ing For chrfsotthe. lies repeat. strnklns Avoided portion 0.53nm epees{ for the leper of filler of (110) and (loo) rensotiens. biter (2mm side) per smpblboler. 0.= layer lips repeat. and approx. Paraeey.a Amphibole spacing to 3.5 ratio of non-twinned layer liras spot ssa=U1.a layer line .past distance (6.53nm). Ambiguous ,/= fills s trum conforming to laboratory p~PHIBOLES 1 Identification criteria observed. Amoaite I F= Single Fiber (1-3 latanaatioos = 1-3 flbsn) 26mm (lilac Non —asbestos diameter apart) Crocidolite I B= Bundle (>3 fibers (1 fi ber Anthophyllite C= Muster (>3 intersections) ste pping gala.: M= Matrix >eo s/G.0. or in let 4 G. Tremolite ice Non—Identified ,m l NYC-WTC 000104104