NYC-WTC_000188648

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP 5691 - 10/15/01 Lab Sample No. 51073 Filter Type MCE 25 mm Ocerator Client Spl. No. NSHS-SIR- 1C'/14 - 05 Filter Area 385 mm' Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,4OCX IGO) Area 0.01124 mm'^2 Comments Acc. Voltage 80 kV No. GO io be Analysed i 3.147 Struct. Corspd. io 70 s/inm"2..)

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

2. H2-. 1 4

Photo No. (from 1 in S aabeatoa- Identify all atructurea uaing EDS Chee ( diffraction for asbeatoa Store all unrepeated apectra containing samples) Grid acceptance:! atructurea up to 70a/i'^n (lat 4) <50X undiaaolvea filter, overlapped or folded Struct- = > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holea or opaque areas F B C M > Sum to laboratory Identification criteria observed. •Unused portion For ehrysoUls: O.Tanm soacing for (020) reflecUona, or nitsr O.a3nm ipacing for th« layer line repeat, atreaking Chrysotile of (no) and (130) reflecUona. ilded portion or niter For amphiboles: O.S3nm layer line repeat, and approx. PorUon of niter (Zmm vlde) 3.fi ratio of non-twinnod layer line apet ipacing be aubjset to examknaUon Amphibole layer line repeat diaUnce (O.Mnro). v/s EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 interaecUana » 1-3 fibers} Amosite Bs Bundle (>3 fiben <1 fiber diameter apart) 25mm fUtar Crocidolite Non—asbestos Cs Cluster (>3 interaections) ------- i'* SUppinc Ruin: 1------- Anthophyllite Ms Matrix NSD= No Structures Detected >50 ./C-O- or In lot 4 G.O. Tremolite Actinolite Non-Identified L;\QATA\PRIVATE\M1KEC\CADD'^EM3 9/22/88

CITY_21MC100_003082210

NYC-WTC_000188648