NYC-WTC_000202627

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS L7\S CROUP #: 5650

LoO Sample No. 6Q7Q8 Filter Type MCE 25 mm Op.aracor Client Spi. Mo. 9-16 Filter Area 285 mm-2 Instrument I.D. SMLOC^ Grid I.D. O' Lf if Disk No. Screen Maqniticacion L6,400X (GO) Arsa 0 . Q1124 mnr2 Commencs Acc. Volcage 30 kv No. GO to be Analyzed 4 147 Struct. Corspd. co ~C 3/mm^2.)

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

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Photo No. (from 1 in 5 aa lestos- [denLify ail atructurei uamg EOS Check diffraction for ibeaLoa tare all unrepeated apectra containinf samples) Grid ■eeeptjn^;|____ atructurea UP to im (l«l 4) <50% undiaaolveoinianovertapped ar foidea Struct. = > 0.8um * > 8:1 Aspect Ratio <iOX partieulata eovaraca aSOX coveragd Totals. Na Net Obacrved (EDS apeetrum or diffraction pattern) at least 20 unfolded or overlapped frid iquarea PoaiUve dlfTracUon pattern properUaa conformina <8% holea or opaque areas F B C M > Sum U laboratory IdenUfteaUon criteria observed.

!55iiS« -UnuMd pardon of niter -avoided portion Chrysotile I I of (110) and (130} reneeUons. or niter For ampbiboies: O.SSnm layer Une repeat, and apprea. (Smm Vido) 3.3 ratio of non-twinned layer line apol spaclac to Amphibole layer Uns repeat distance (0.83nin). EOS spectrum eonforminc to laboratory identification criteria observed. AMPHIBOLES Ambiguous Sincle Fiber (1-3 InteraceUona = 1-3 fiberai Amosite Qs Qundla (>3 nberi <1 fiber diameter apart) C- duater (>3 intersecUonv) zarnm niter Crocidolite Non-asbeatos ------- 1 StBppiOf Ruiea: I--------- - Anthophyllite «= U.tri. NSO= No SUuctum OalacUd [ >d0 i/G-O. or la lit 4 3.0. 1

a/22/fla Tremolite Actinolite Non—Identified U\DATA\P1UVAT8\H]KSC\CADIlVSHa

CITY_21MC100_003274234

NYC-WTC_000202640