Document vB8YXgqkGVvJ1RNQ7vVovy8y6

'Federal. Register;.I Vol...51,: No.-119; / Friday, June. 20. 1986 / Rules and Regulations. 22787, then.be removed from the bag end the glove . bag itself can be removed from the work area : to bedlaposed of properly (Figure C-1(D|). Top View r~ i i i Work Area i i. i i L_ ------ T" 1 11 11 II II 1 , V 1 1 . . 1 II Change Room- I I II II 'v 1 .i. 1 l ,Ma$t1 c:: curtain Mastic cur tain Side View Vacuua hose (2) Covering the floor .with plastic and sealing the plastic covering the floor to the plastic on the walls. (3) Sealing any penetrations such as pipes or electrical conduits with tape: and (4) Constructing a small change room (approximately. 3 feet square) made of 6-rhilthick polyethylene plastic supported by 2-' inch by 4-irich lumber, (the plastic should be attached to the lumber supports with staples or spray adhesive and tape). The change room shoyjd be contiguous to . the mini enclosure; and-is necessary to allow the worker to.vacuum off hl9*protect.ive coveralls and remove them before, leaying the work area: While ihside the enclosure, the workershouldwearTyvek1 disposable . coveralls andusethe appropriateHEPA \ filtered dual cartridge respiratory protection. The advantages of mini-enclosures are that , they limit the Spread of asbestos contamination, reduce the potential exposure of bystanders and other workefs-whoimay be working in adjacent.areas, and are-quick and easy to instalj.Thd disadvantage of rrilpienclosures is lhaUhey may be tod small to contain the equipment necessary (o create a . negative pressure within the enclosure;., however, the double layer of plastic sheeting will serve to restrict the release of asbestos . fibers to the area, outsidie the'enclpsure. Removal of EntircStructures Plastic curtain Plastic Curtain When pipes areinsulatedwith asbestos: containing materials, removal of the entire pipe may be more protective, easier, and r --TT . . , i : II I- i Work ll Change-. 1 i Area! " 11 Roo* ` i ll 1 i i ll ll r-'.*~ -r;.,; ,1 v-.- ll . I Cautlon l ., I, 1 ll . 1 Con tel nit 1 1 1 . ll 1 Asbestos! 1 1 ll 1 ll 1 ll ' -. 1 1 ; 11 -l.:-. II 1 II. :t-- .'.V. Vacuuahose more cost-effective than stripping the: asbestos insulation from the pipe. Before, such a pipe Is cui.-the asbestos-containing insulation must be;wrapped;with 6-mil / polyethylene plastic and securely sealed .with, duct tape or equivalent. Thiis plastic covering will prevent asbestos fibers frbm becoming , airborne as/a result of the vibration created : by the power saws used to cut the pipe. If: possible,, the pipes\sh(^ld be cui-aVlpcatipnfl that arenotlnsulatedtoavoiddisturbihg tHe... asbestos. If a pipe Lr;cdrnplete|y in8uiated . V with asbfc'stosTcbhtaining riidterials/small ... sections should be stripped using iHe;gt6vebag method describedabove-before the.pipe iscut at the'stripped sections. . ' Enclosure ........... -The decision to enclose rather than remove asbestos-containing materialfrom-an* area depends on the building owrVer's p'referencef i.e.. for removal 6r; containment; Owners Ftgure-Cr2. Schernotic of Mtnienclosure ; conslder,6uchTactpr8 asepsteffedtiicetiesb; 'the.physical configufation of the work area. .' . andtheambunt.pf^ : determining which abatemeht'nieth'dd'tp.use.- , If the owper chooses io/enclose the, ' structure rather than td 'rembye^the asbestos- . Mini-Enclosures - ] . // . ` enclosure should be constructed of irniil- - ; containingmaterialinsulatingit;^soli'drv. V* [h some'instances,'such as removal of * ' r thick (k>lyethyrMeVplBstic sheetihg and can " asbestosfrom a:smairv6ntilali6nsysiem or' be small;jenough,-to: restrict entry to the - ' from;as short.length of duct aglovebag may ^ - . asbestos work'area to'one worker.. not m either-larg^ enough br/of/tii'e proper7 For example;.a mini-enctosurecan be built1 shape fo enclose the work area. In such : iri a smairiitility closet when asbestos*, structure (airtight walls and ceiiihgsj must be . bullt around the asbestos coyered pipo or . . structure to prevent the release of asbestos-; , containing materials;into^the area Beyondlhe enclosure and to preyent disturbing these * ,cas^.a;m^n|renclosWe^ around containing duct c6yeringlis1o be removed; thearea-wheire small-scale^shortKiuraiion1 /The'enclosure!is constructed by;,:; asbeslosmaintenance or- renbyalionworkis. v.(lj Afnxing`.p!a8lic 8heeling to the walls to be peHormeS (Figure G^2).Such an . ", . with spray adhesive and tapef . . . 1 Mention of trade names or commercial products docs'not constitute endorsement of---recommendation for use. GLEASON-001035