Document wreDN2oVexr7jZwRMgKD92gVJ

. . . f\ CJp * ' . fv A*' c** -- -:-------------- MOUNT SINAI S C HOOL OF MEDI CI NE '^` oj To: City ihuvirsiiy oj Sav York "\ " c. ..S F I F T H AV S. VUE A N D l O O T H S T R E E T * N 5 V Y O K k', S.Y. 10029 : V 'v iriirtci:!iffComnu!\ily /.ffi/iCi*/ I.' Assistant Co,--.:ir.sior.or Harold Hot.or New Yor!: City Department of Air Rosourcos j ! ivijcor . ' ( . 1/ a w *. w* Donr Ctommiss ior.er Home r: I 'have completed a preliminary examination of the materials forwarded to our laboratory for minornlopical a n a l y s i s T h e results are as follows; (1) Hhxnmi nation of the- rubber ballo-as indicates that a fino vhito i po-vb;r coats their interior! This*. powder lias boon removed,in part wator and the inorganic residues examined by moans of electron microscopy( both transmission microscopy and electron di ftraction) . Tho powder is made up of iibrous talc, that is talc made of both piety truo talc and associated amphibolo asbestos fibers*. Tho amphibolo type is primarily trcmolltc, with some scattered authophyllito. In or.o ease chrysotilo asbestos was also detected as boin,T present. Tao amount of these latter two asbestos miauraIs is extremely small. (See enclosod KM plates). (-0 K\r.:\i nation o'f ,'tho two bo<1y p o w o r talcs indicates that they both co:;:air, .-....onatn of fibrous r:inornls . examination by li/ht micros copy and x-ray diffraction indicates that tromolito and some nntho- phyliito asbestos makeup the fibrous co.npone 1 >lln L O i. :njes as c.itoirar.cd by li/rnt microscopy .1 :> -.e/eer.t .Kxcmlr.s tlon of those samples by co a r..icro-.cwpy ir.ui cat os many of the fibers, exist In t.ho si r.o ran ;o . -------------- . j r , - -- ; . !\ !I .- ' 4a ' . rv ^ ,r^ _ ___;, _____* ; _________ . _______ ________ , /\P ~ ^ r ' } V M O U N T S I S A1 S C H O O L O F M ED l CI NE 0/ 7 7: G `y ilnivirsliy oj ,\V;r York f =J PTH AVSN' UC A N D I OOT H S T R i H T - N S V Y O U ' , N.V, 10,0 2 9 : *' ; " Y, f\iriinc>:!sfComr*untly?'<cO>Ztu( May 10, 1971 Assistant; Corn:.::ssior.or iLarold Homer Ncv Yarn City Department of Air Kosourcos 51 j\;>tor Place X X./- 1 / ... , X -n 10CO 3 / Dear Commi ionor Rmer: I have completed a preliminary examination of the materials forwarded to OUJ laboratory for minerale~ical a n a l y s i s T h e results are as follows: (1) Zxami nation of the rubber ballons indicates that o fiuo vuito i1 powder coats thoir interior. This,, powder has been removed,in part,w;:h water and the inorganic residuos examined by means of electron microscopy( both transmission, microscopy and electron diffraction). The pov/cer is made up of fibrous talc, that is talc .made of both platy truo talc and associated amphibolo asbestos fibers.. The ampb.iboio type is primarily trcmolltc, with some scattered anthophyllito. In. or.o case chrysotilo asbestos was also dot ected as bei DT P re: min 0 raIs is ext rome C O Tea :\ination of ;the Lv*< Cor.t-'iiu n...ountn 0 f '-3 copy and x-ray diffraction indicates that tromolito and some nntho- piwllite a too makeup the fibrous com pon or.cs . Tin.' amount of P--e;-en: tr. us as co to m i n e d by li;p\t microscopy r- - fr. -. .1 :o DM merger,t .Ilxamir.a tion of those samples by 0 i * r o . i microscopy i n d e n t os many of th.e fibers, exist In the ~ ------- --- -------------- '' > :>u 1t a re p re 1 m tr.ary in natu ro and taa t rrar.tod to delineate whether 02- not a U- V. i ' ^C.v.V- .-- ,, I . ..... r;- MOUNT SIX A i S C H O O L OF MEDI CI NE cjTn: Q `y Llttivsrsity ojSiaYtrk P I P T H AVB. N' U E A N D I 0 0T H S T R f S T ' N G V Y O i T N. V, i 0 1 9 ,v_x- /1 V M I have completed a preliminary examination o the materials orwardod our laboratory or minoralo~ical a n a l y s i s .'The results aro as ollows; (1} Examination of the rubber ballons indicates that a i:io vhito i poxLor coats, thoir interior. This,, powder has boon, removed.in {. par: jWitii water and the inorganic rcsiduos examined by moans oi elect\x ja microscopy( both transmission microscopy and electron diffraction). The po-.vder is made up ol iibrous talc, that is talc made oi both platy traio talc and associated nmphibolo asbestos iioers., The anphibolo typo is primarily trenolite, with some scattered a u t h o p h y l l i t o . la or.o case chrysotilo asbestos was also detected as boir. present. T hu amount of these latter tv/o asbestos minoraIs is extremely small. (See enclosed EM plates). (-0 -'-ami natica of 'tho rmo body n o w d r tal ex indicatori that they both cu::: air. a.-Punta of fibre.::; minerai:.;. Ex ami nati or\ by li^ht micron- copy and x-rny diffraction indicatea that tremolito and some nntho phylito a cb,-;.; ::,nhec.p th fibromi compone;: cs . Vivo amena l ol e.-ea ; ,^a >Ie s as ce terni ned by li;;nt microscopy . . o . Ex cu r.a tio a o i thoso san pie s by *j.-'-so.: microscopy ir.ucatos many of the liber s .ox Is t In t.!:o ~d ntcr.-n sino r.M;-;o. --------------------------------------------------- . * > ( > "0 ^ * J; .. . V I' C. v.V MOUNT SINAI S C H O O L OF MEDI CI NE oj To:City Uiiivsrsiiy P J F T H A V 2 N U E A N D J 0 07 H S T R E E T * N u V Y O R K , N. Y, 10,0 2 9 IXfxirit.'trKl <?f Co>r,nufnty f'.irJet&s I 1; May 10, 1971 Assistant Co.-ami isior.or Harold R o n o r New Yorh Cj.t.y Department of A i r Resources 51 Astor ?!a c o *'Cw * V l A ( .vu<-,v., V* Oa vi V4v ATOo Wr n 'O? ./ / Dear (tommiestoner Homer: I "h;h *o completed a preliminary examination of the materials forwarded our nbo ratory for ainoralogical a n a l y s i s .'The results are as follows: CD Henri nation of the rubber ballons-indicates that a fine whito powder cents thoir interior^ This,, powder has boon removed,in part,with water and the inorganic residues examined by means of elcct'cca mic r o s c o p y ( bora transmission, microscopy and oloctron diffraction). The p o w d e r is made up of fibrous tnlc, that is talc mad.} of both platy troio talc and associated amphibolo asbestos fibers.. The amph.ibolo type is primarily tremolite, with some scattered authophyllito. In ono ease chrysotilo asbestos was also detected as being present. The amount of these latter two asbestos minerals is extremely s m a l l . (See enclosed DM plates). CO i.*xam; nation of 'the t w o bo d v r>owd~>r ta I cs indicates that they both contain n...onntn of fibrous m i n e r a l s . Examination by light m i c r o s copy r*nh x-ray diffraction indicates that tremolite and some antho phyllito a `due; t o o maheup the fibrous c o m p o n e n t s , 'flu: amounL of - presen r tn tr.eso samples as c;elornnod by 11 gnt microscopy '**" ' frr-, b ro DP percent .hx cm ir.a lion of th o so snmpl c s by el -uroa r..icroc-py ir.uicatos many of tiic fibars .ox 1st in t.ho ~o fs:r 1. i . > , f i *! r ro pre 1iv,1r.ary in nature and tha 11 r;:.1 1 or.: o r e warranted to delineate whether or not a with, these m a t e r i a l s . It is of interest to note that r v 1 1o s l.') ;r: ;y s t a a..card ex i.:r.t; (Marca , 1971,sen enclose . *X - v. *, : n.s snon-.: ne o'>'r. >*v;>-red until tao proslorn. is A 4 l.A \\\