Document NjKOdDvd07E37EvYL3eYLwNE

- ft jr T r*` ` * s*' f .V* i . I. DU PONT DC NEMOURS & COMPANY cha::::* s?.:3 cerjrsvcric:: uuarawr Tot covszxaio:; divxsicx X. E. JCt'PES divisio:: s.iyrrf svn.ii:Ti:c::T tcuvuss lur-otxc rvpif piecyt vii iv|cn cstts kij;w Dtr. Oocsti'ter 5, mt H. D, Eoyct - Uouvltf l t. Front i. V. TKATCS5X SAfsn j::c::25x, Subjtctt ?r.rrzc7ic:: "cr> irzvuno:: hiait?. 2a2.cj>s c c t Ptr your Truest, the folieving practice* ace followed; X) Keep the Shop cleea. Use a vacuus for clean up to avoid tclrrlr.j duet. (A built-in vacuus lyittn could be considered for any new Shops). Pay particular attention to lodges and purlins. 2) Us have our sachlrat in an isolated area to prevent creating a general she? berard. ' 3) Kaep as lo*..* a celling as practical and possible to reduce the cleaning prealett. 4) We art nenlcorinc for air borne dust hazards. (This it eorrron to this aita for ttsny cottlc r.iteriais).' ' However, a dust hnssrd rsnitoring system requires special instruments, te., as the asbestos study has pointed out. 5) Ve exercise caution in our field work; avoid congestion, vork on the up-vtnd side, Isolate jobs, etc. We do not need any power tools in the field since all possible fabrication and actual application Is done lr. the shop. 6) Pot.tr cools la the shop have exhausts directly connected under the cutting tables. These lead to a Cyclone Collector outside. Thus far, this has proven adequate; however, a wet systen or bag collector night be in order to prevent dust being "bietm through" the sysrea .polluting Che outside area.- This sort of "after filter" cants added If it proves necessary. Our systea is a 3 HP Torlt v20-sr:i. Torlt Cerp., St. Paul, tllnr.csoes, alias ehesa in various capacities. SIre will depend on the nurber of iwhiiws to be handled, t.'e exheust mintnun of 1500 C.F.". at 4033 r.P. Torlt hna a consulting service available; hovavtr, Plane Design eheehtd o out also. 070 DUP 0900736 x. c. xsurn f.\<3 2 . fiSSSUSSJlaJUtti 7) We hold tho tdtai dust count below the T.L.V.* for asbestos. In tho future, vo can forgot sampling for at sueh since tho count of any ont raterini obviously ctnna: exceed tho total. It should bo recognized, hou-ever, that air satpiinj bjsit to bt continual if you do sirs to sstablish and 'cet? defensive data. \ * Threshold Halt Value - Asbestos 3,003,CC3 ^articles per cu. ft. LVTiVuat Oop 0900737