NYC-WTC_000208957

9/11 Public Portal Document

Jun 10 OS Q2;Q4p res-3V-2002 IV-'ll "Vri.'.ri.'F--—nt., coep p-5 0 5755

aoaiamiMilon before taking cassaies into a dean prepay. /xFAROXtMATj rice arsa. ! 10.2 Perform sample preparation in a dean facility that ) ; *5 0£OS£E / ANCLE has a jcpanie work area froia both the bulk and air sample 1" TO 1-1/2' OR 25 MU TO j?MM i!: 1 / / ■ prepararioa areas. 10.3 Initial specimen preparation shall take place in a clean HEPa filieteti negative pressure hood to avoid any 1 i poodhie caniaminatioa of the laboratory or perjcauei. or sM. ■- rusiNC aiiuCTEfi I both, by th* potentially large number of asbestos struciures in an asfaetos-eontaining dust sample. CwiTtness of the preparaiioji arw hoodj is measured by the curauUuve Ui process blank eoBcentrarions (see Section 11), 10.4 Ah sample pfsparation neps 10-4.1 through 10-4.6 FIG. 1 EsMtpM oi Tuomg HocO* Shan take place in the dust preparatioo area inside a H£?A --------------- — — ------------- — ‘ - '

. .... ' •-•2,.’^ 10,4.1 Hemove the upper plug from the samjile cassette ample area of IQO cn= is y«uua^ ui^there is w vist^e i^j^ce approiimsiely lO ml. SClUtiOC of a duet or particulaia maner remaming. Perform a minirot^a ^f p«riclt>ftce «ww and rtagMt alrahol into of wo Orthago««l passes on the arfaee witl^ a mtrnmu® of - nun of sunph^ u^- ,*vaid scraping ar abrsdiog wi nozzle was left aoashed 10 the eassene, ibco nanave the plug wri^ bong sampled (Do oot simple my debrt ar dim iatreduee the Mit«/Bi«boi solucoa foto the enmne tamale greawethw 1 utm in d«in«ff(^4.-X)Sraalleijor through the tubing, and fhex remove the tuhiog. if it Is larger areas can be sampled, if needed. For example, setae vtsibiy clean. surfaces of io^ may ha« a smailer arw IM 4-. ,5 4^ jhe uppe plug or foe sample cap and Less dusty ivrfacss may mquw vacuuming of larger atjaa- ,41^ yje dust suspi.-nsio» by hand for 3 s. Unlike air Jamplei to ofto cas«io with <*« ap of to easKtu Mid pour to wiU sot be a problea. Ae defisKJ in 12.5, only dust skaU be staptaaoa through 3 1.0 by LO mtn opening screen (7.46) - u 1.. iuw a procleaAcd 200 mL gJaa spedtnca bottle (7^). All S.S Al to erwl of »mpk roL'enncn. invert to cass^ » Sample cotaaiaed in foe ceacoe shall be that to oo^e tabs Saos up before tomag off ths j»fo through foe screes lam to speamen bottle wifo a foe pump. Tbs neito » foeo sealed wih a cassene rac-j^ug coutafoine to 50/50 solutioa of panicle- and xht c»s$ene/ao«k upcd er appropriaxcly packaged » free wauf and alcohol, (tepee fob procedure two adduioDal prsveat sepAftiioo ef the aczzJe aod cuaene jssemhJjf. A times fora total of three wafoags. Nen. rime the nozzle two socoad option b ihc removal of ch« atnzie flora the cassiiie. or forte times Ihmugh foe semen iam to. speriinen bonis iheit p!«s&na of the cassinc ind shipmem or the nocsls with foe 50/Sd mixture of wa«r and alcohol Tyjitcilly. foe piug^ at both ends) aaled in a sepaiete eloenbie stfStic total amount of foe Sd/SO toixture used in foe rinse is SO u bag. A thitd optian is pi^tsg (he wazie inside the cosene 75 mL Discard the 1.0 by 1.0 mm scracn and bring foe for shipacoL The nozzle is always nvsd and rinsed bemuse volume of solution in fosspeaneo bottle up to foe ICO mt a sisaifleaat perarntage of the dua drawn from » Vihtly mark 00 to ride of to bottle with panieie-froe .water only. loaded asrfiace may adhere to the inside va&iu of the lui isg. 10.4.4 Adjust foe pH of the suepeasion to 3 to 4 using t 8.9 Check that aU samples are ricarry hWed, than ai! dust 10.0 a solntiaa of iCfJc sod. Um pH paper for testing sampha^ iafofmaiiion sheets art eorapieced. and that all Filter to suspension wititin 24 h to avoid proWetns associ­ pmioint infonnauon has been esciosed in iccordance with ated with boctarial and ftLogai growiK labonioiy quality control praetiees, before troAsfer o' the 10.4.5 Um eifoer a diiipMabte gJastic fUtfaticn unsi or a samr^Jos to (he laboratory, laeiude an unused easKuq and slars fiJuring unit (7.14) for Sltntiott of aiicuou of to nozzle as a field biaok. tiASpenaon, The abtUcy of aa imliwdual nitration uuii to a. 10 Wipe off the exterior surfiee of the cassenes with dupossble *« »we& (hefty wipes) prior to pacicaeiae for product a valform tolribuiion may be tested by to shiptneni, I lUtnaiiOD qf a colored particulate suspension such as diluted India ink [suspenaon of carbon black). 9. Suople Shipowtt 10.4.5.1 If a dSsposabls pUsK fijimnoa unit is used, ihen unwrap a &«» dispostbio plastic filler foand unii (other 25 9.1 Ship dust MUI pies • w , aiuilyucai ■ iabotatoryj .. -I® ® or47a«nd>4tn«MM-3 tod reasoveibsiape arouftdto ham of sealed coouiaer. but wparaie from any bulk or au «: jpl^ (ypngi, Rswove foe funnel and dimaad foe top filler The caamtus rawn be tightly sealed and pack^ in 4 ra iierial supplied with foe a.pparSEtus, retaining the eoarxe fres of Shers or dust W miftimize foe pottoBal for cosfiaml- polypropylene suppen pad m rfsm. AsmaiWe foe unit with uatioa. Plastic “bubble jack" is probably the moa anpro- foe adapter and a propedy sized neoprene stopper, and priate material for thu purpose. anteb foe funnel to foe lOOO ml side-ann vacuum Qask <7.15). Place a S.O pare size MCE (bucking filter) on to 10. Sample Pwparatwa support pad. Wet it wifo a fow mL of pinfoto-fm water and 10.1 Under a oegsiivs flow H5?A Hood (7.5), carefully plflceto UICE(7,!6)or?Cfibcr(20Jt2uinporesizej(7,17) iMft.wipe Che «z?«iw of the casscaa w remove any posable on too of foe baekiog filler. Apply a vMuum (7.36). ensuring ( 4

NYC-WTC_OOO2O896O CI ._lHeluu_un249602