NYC-WTC_000208957

NYC 9/11 Public Portal Document

Jun 10 02 02:0Sp flirtek Environmental YeB-87“20B2 17;4i> iik.iu.i'fli ir tY unti^ Eorp 12121768-0759 p. 1 □ ' regulhr basis, and retain these records in the lahbi atcry, in number for Um Cu peak and be censin that readings are aecwdaace with the tahefttory’s quality assurance Mejram. within aJO eV. 20.2 Accord calibntiftkS in a leg book along will dates of 20.4.2 CoDeci a sundart EDXA of crocidolite asbestos cuibretlon ud the attached backup documentation (NIST SRM >W<). 20,} A calibration tut for the iestnuneni is u fo l»S 20.4.11 The elemental analysis of the crocidoliw most ■ 20.3.1 TSM: resolve ihc Na peak. 20.3.1.1 Check the alignment and the systems p) sraban, 20.4.3 Collect a sandard EDXA of chrysotile asbestos. Refer in the TEM martuQciurcr's operational bm tu«l for 20A.}, I The eitrosvrtal analysis of chrysotilt Djusi resoNe I deuiled instrunioes. both Si and Mg ao a tingle chr^tik fiber. f 20.}. 14 Calibrate the caititra length of the TEM in eiee- 204 Ultrasonic bath cafibration shall be performed as iron diffraction [KOJ operating mode before £D pa iteras of Coliows unknown samples aft obtetved. Canen length eu be men. 204.1 Flu the bath water » a level equal to the height of sured by using a carbon roared grid en which e thiii filai of susptMioft io Che gUs sample cdBulAer that will be used for sold has been spuneed ft ewapofatod. A thin flint < fjoW is the dun analysis. Operate Ute bach unta me water reechss th* evaporated on the speci»en TEM grid to Obtain a ine-aws equilibnum temperature. £D paiuras superimposed with a ring pattern from i m poly. 20.3.2 Place lOO mL of water (at approximattiy 20*C) in cn'aiilline soW Sim, In pra«i«. ii is 4esinbl» lo piimiie latJiher 21W-mL glass ample container, and record its Uis thickneis of the gold film so that only one or two sharp tirtperiturs. Hags are obau&ed co the superimposM SO pansrjt Thick 20.3.3 Place the ample conuiner la the water in the goid lams will tend to mask weak diffiracrion spots frwn the uloMoaic both (with ibe power turned off). After 40 s. fibrous particlei Since the unJuiowa d-spacings । if aos rciMve the glass container and record its temperature. interest in asbestos analysis ars those which Ue close t to the 2Q.3.4 Place lOO cnL of water (at iDproxitBatety 20*0 in '.ransaitced beam, multiple geld rings frtxn thick B Ims are another 2CK}fliL glass sample coniaiaer. and record its unnecessary. Alwroaiively. s gold soadart speeiaet can be KDiperaoire. used (0 oboia an average camera eonsradt calculated for that 20.3.3 Place the second sample container into the water in particular iasirumeni and an then be used for EQ ititems the ultrasonic hath (with cho power turned on). After €0 s, of unknowns taken during the cnrrospoitding period. remove the glass rontainer and record its lemxraiaie. 30.2.1,3 Ferferra mxgflifieatioft calibratioa st th* luftts- 20.5.5 Calculate the rate of deceaclaQ into the »ni screen. This oUi^tion ouut be performed » the sample coatslwr using the foUewiog formula: magnificatioa used Ssr structure counting. Calibration is «-a.lS3x<x#M2C±) perfctmed with a grating replica (7.47) (for «uube^ one [2) coouini-Tg «least 2150 Sots/nimX when;

j i (a) Mine a field of view on the aueaeaeeBt serwin. The . 4.185 -loules/ai, (ieldof view mun be measurable ft previously iiuerib|Mwich a scale ft coneentric circle (all JOJe should be metric). - (5) Frequeacy of eaHbraiiQn will depend on the icrvice A " enftsy deposidoa, waxtVmt. « lemperaMre rise with (he uluwnic bath not oper- «ta8,*C, hisury of the porteular raieroacops. h Si umperawra ri.ie wih the attrasoaic bath operating. (c) Cbedc Che calibroQon after any maioteAaace of Die X, microecope dot involves adjusemesc of die power supply to t Eime b SKCBris. 60 s (204.3 awl 20.S.J). ! the lens or the high voitagt ryen or the ffi«e|utea3 pacific heat of the tiquid in the glass sample i disassembly of the electron optieal coluein (apart fiom coouiBef, 1.0 cal/g, »ad Itlament exchange). a - density of ths liquid io the glass sample coniairiw. (cf) The laaiyst must ensure that the gnung rtj ika is i.O gfett?. placed as the jam* distaoK ftoffi th* cbjectivc Ims «s the 204.7 Aegtst Che openiutg caadiiiom of the hath so that specimen. . the calc of energy depcsiaoa is in die ocge of 0.08 w 0.12 (e) For iaitrorncpa that iacorpente a Aicetlinc tflaog MW/nP, as defined ay this procadtne. specimen stage. aS soecunens and the grating replia n us be placed at the eueeairie poatian. 2}, FncKiaaaadBiu. 20.3.1.4 The sinalltst *5poi size of the TEM misi be 2I.t Prrtixiors—The preeiaon of the pfocadfteb this test eheeked. method la bong decernuned wiag round robin data hom 1 (a) At the crossaver poiat, piMtograph the spot a: e at a parudjstaag labenCories, screen tJWgfliflcanos of 13 000 to 2O0COX. Ao tx osute 21.2 ^for—Sines mere is aO accepted rrftrMue raotsriat time of 1 »is uSaoUy idetjusua. stiitahltr fcir dexerxaining the bixs of the procedure ;n this test (4) The measaiad spot sia lauK be leas than or ea»al w atdhpd, bias has not been hetermined (see Specifiaaon 250 sm. Ci 3670). 20.4 SDJCL 20.4.2 The resolution ami calihration of the EDXa iUors J~Round rohm fta is utsder devckpnteai rod *111 be veriBeA fteseelad m * meinrk lepan. 2X4.1,1 CoBeci a. staodard £DXA Co peek fren lie Cu 32, Xcywftda 20.4.1.2 Compare the X-ray eBW(!y *«»a tApmsel L . 22.1 wbetos. raiefOvacuuouBX sealed dun: TEM

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