NYC-WTC_000188682

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAH CROUP : /01

Lab Sample No. Fl leer Type MCE 2 5 mrr Operac: Ciienc Spl. No. £ Filcer Area 385 mm"2 Instrument I.D. EM 10 CRX Grid :.D. Disk No. Screen Magrxificacion 16,400X IGO! Area 0.01124 mm'^2 Comments Aco. Voltage 8C kV No. GO to be Analyzed 4 147 Struct■ Corspd. bo 70 s/mm^2.)

Length I.D. of Structure EDS GO. Structure structure Type (Nonasb. No. Coord. No. >0.5 um F B C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

7

Store all unrcpeated spectra--^ —Photo No. (from 1 in 5 aabeatos — Identify all structures using EDS Check diffraction for asbestos containing samples) Gnd acceptance:! structures up to 70a.Zt^n (let 4) <S0X undiasolved filter, overlapped or folded Struct. = > D.5um & > 5:1 Aspect Ratio <10% parUculate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion For chryBoUla; O.TOnm spacing for (020) raflecUDna. of niter Chrysotile 0.53nnn spacing for the layer line repeat, streaking ‘Avoided portion of (110) and (130) reflections. of niter Por smphibales: Q.53nm layer line repeat, and approx. PorUen of flltor (2mni wide) 3.3 ratio of non-t«tnned layer line spot spacing to subject to Amphibole layer Une repeat distance (Q.SSnm). examination

/= EDS spectrum conforming to laboratory identification criteria observed, AMPHIBOLES Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers] Amosite B= Bundle (>3 fibers <1 fiber diameter apart] SSmni filter Crocidolite Non—asbestos

□ C= Cluster (>3 intersections] [ Stopping Rules: I Us Matrix F Anthophyllite NSD= No Structures Detected | >50 b /C.O. or in let 4 C.O. Tremolite Actinolite Non —Identified L'\DATA\PWVATr\MIKEC\CADD\?'EM3 9/22/98

CITY_21MC100_003082474

NYC-WTC_000188682