Document jgMw4E692pjXyadJqz7OVo5O2

Indualrlal HvaUni Diae.l AurukIi lOfal hatardt. Spray. and mint from hlgh-fls.h.point solv.nta can airily iinlta in lb* air. Sum. mar tamparaturae boo.tad by heat-producing industrial oparaitsna can'braad asrioua firaa. Daaplta all warningi, numerous plant! still uaa gatalina a* a cleaning fluid or degraarar. Caaolina ia meant to burn in an angina. U baa no other lagltimate uaa. Flrsfighters who may b* called on to use vaporising liquid lira aatingulahart laarn that carbon tetrachloride, chiorobromomathana, and methyl bromid* are toaic at room lamperaturaa and conaiderably more toalc in the beat of a tire. Solvent*, particularly haloganatad solvents tueb a* carbon tetra chloride, trichloroethylene, and tb* Froon*, need not burn to decompose. High temperature will break them down. Inert arc welding (hellarc), using argon, produeaa enough radiation to break down trichloroethylene vapors into phosgene and hydrochloric acid fumes. When this bappens.workers get sick and equipment corrodes, Cacopt under carefully controlled conditions chlorinatsd solvents should not be stored in vessels mad* of active mauls such as aluminum or magnesium. Failure to follow ibis rule caused a plant explosion which took the lives of 10 firs- men and injured 37 otlwaa- The degree to which solvents affect insulation and parte of electrical systems depends upon the matwltle. Bines-there aie'tiumlrude-ofeotvcwta mv*ha mandat. those can be no single precaution which wobld apply in allca.ee. To make sure a plant uses solvent. . safely re,qul)r*s` qtudy. . ` .. , . .. Ia ' MISCELLANEOUS .. . 7 794 Tmtmflht Method* for Ugndty Wastes* J. F*. Spade, wmr 4* Seweae Work> 109. U0Ti> (Mar. 1964). Method* of treatment for laundry wiitti art described ti chemical precipitation, And filter#, and high rata trleUing filter#*. Emphasis la made on the laereaaing uae of dta. tomaeeoua earth filter* Reeulte obtained in the removal of BOO (biological oxygen demand) ajid detergents (measured by AB3 determination) from two commercial type plant* are en couraging, but beet results ere limited to puma operating at a maximum of 40*000 gai,/day .w Public Health Eng. Abets.