Dlftalnn of induvlfUl fl/iline IT While mala) 18 Blue 10 Zina bate dta eeitlngi (a) Retlrelytta proceis (b) Helen only to itoel IU) ae rta bath U uied <e> Alio lead alleya (dj Sediiao nitrate bath

t 5-: * & Vcrked one nay rlc-COr'^itcaoTilfi^'^ b.e->` 'effects of, lead,' tcnld'^n;'tiii^-v;;| a- cessation of.

Store ia^ortastly# the wearing of contaminated shoes could lead to absolution of the liquid through the soles of the feet as through maf other unbroken skin surface

His lead operator D.

* ha^inf their electrocardiogram recorded on Lead I; the two active e l e c S S f T e ^ l S i ^ K ^ i f h t and ne* hrine iO 008 m e / S ini 1,6 ln^lf^rent .electrode midback.

Mesas., Asst, Coatralier, Ifettoeal lead &mp&W !

The other suggestions a re intended to rein fo rce what has been said in 1. above, o r to em phasize the fact that the decision in the m atter of the in crease in the lead content of m otor gasoline will not come easily .

These men are variously engaged in th tetraethyl lead and of most of the intermedi enter into the manufacture of tetraethyl lea fluids.

OPERATOR 17 SILICAS SHIPPING 17 SILICAS SHIPPING 17 SILICAS SHIPPING YJ ' y y N SILICA PRODUCTS PACKER N SILICA PRODUCTS SNIFFER N SILICA PRODUCTS PACKER 17 SILICAS SHIPPING 1 N LEAD PCKR, SILICA PROD 17 SILICAS SHIPPING t N AREA FMI.

Sufficient to form loe on IGV's (consider pressure drop on IGV's) Ice broke free and damaged blade tips on row 1A Damage exolted natural frequencies of two row 1A blades OD 3 zT| o o~i > ti 3 HZ 3Cf\ orl 23 fab BO GT120 SCENARIO FOR COMPRESSOR WRECK At 2:30 am on 20 Dao on* of tha axoltad bladaa fallad Vibration dropped from 5.5 mils to 1.5 mile No drop In performanoe At 5:30 am on 29 Deo the aeoond exolted blade failed Maohlne tripped on low control oil pressure rt 23 fab BO DO A 0 3 6 1 4 0 OONFTDFNTTAl GT120 SCENARIO FOR COMPRESSOR WRECK The blades failed Independently Both blades failed from the leading edge to the trailing edge Leading edge mode of failure was fatigue Trailing edge mode of failure was duotlle (le. torn off) Will not be able to atlok Westlnghouse with the bill D0O)' art 23 fob M GT71 PT BLADE FAILURE JUNE 1990 NO WARNING PRIOR TO FAILURE PT BLADES HAD 29161 FIRED HOURS, 77 ATTEMPTED STARTS AND 24 SS NOT ENOUGH EVIDENCE TO DETERMINE INITIAL FAILED BLADE STRESS RUPTURE DATA ON WRECKED BLADES WAS WITHIN SPECIFICATION #3 BEARING WAS DESTROYED.

Spartite Mixing Sealer im an excellent reinforcing vehicle w: used with outside semi-paste paints c*r Lead in Oil.

Manifolds must be of substantial construction and of a design and material suitable for the particular gas and service for which they are to be used Manifolds should be obtained from, and in stalled under the supervision of, a reliable manufacturer familiar with safe practices in construction and use of manifolds Portable manifolds connect a small number (usually not over five) of cylinders for direct supply to a consuming device The cylinders may be connected by individual leads to a single, common coupler block or individual cylinders may be connected to a common line with coupler tees attached to the cylinder valves A properly supported regulator serves the group of connected cylinders Stationary manifolds connect a larger num ber of cylinders for supply through piped distribution systems This type of manifold consists of a substantially supported stationary pipe header to which the cylinders are con nected by individual leads (Fig 34--1) One or more permanently mounted regulators serve to reduce and regulate the pressure of the gas flowing from the manifold Oxygen manifolds should be located away from highly flammable material, especially oil, grease, and the like They should not be located in acetylene generator rooms, or in close proximity to cylinders of combustible gases There should be a fire-resistant parti tion between an oxygen manifold and com bustible gas cylinders, unless the manifold and such cylinders are separated at least 50 ft Regulations of NFPA Standard No 51, Oxygen-Fuel Gas Systems for Welding, should be followed Distribution piping Distribution piping carrying oxygen from a manifold or other centralized supply should be of steel, wrought iron, brass, oi copper For pressures over 150 psi, extra-heavy pipe and fittings should be used For lower pres sures, standard weight pipe and fittings or seamless nonferrous gas tubing and fittings may be used All pipe and fittings for oxygen service lines should be examined before use, and, if necessary, tapped with a hammer to free them from dirt and scale They should, in every case, be washed out with a suitable non 952 flammable cleaner--hot water solutions of caustic soda and tnsodium phosphate are ef fective.

About one hundred leading manufacturers of soda fountain, luncheonette, food-service and commercial dishwashing equipment have to date received authority from the N.

His lead operator D.

ard, and severe injuries and deaths have oc curred from ignition of powdered magnesium m the clothing of workers who have done hand grinding on magnesium alloys Also, fires and dust explosions have occurred in ex haust systems carrying powdered magnesium from grinding operations Exhaust systems should go as directly as possible to a dust separator which will remove the magnesium powder and trap it under water without permitting it to get into the main exhaust system The wet powder from these dust collectors and tuming-chips that are wet with coolant should be removed from the plant as soon as they are taken from the collecting equipment Workers in magnesium-grinding operations should be provided with and required to wear flame-resistant clothing Massive pieces of magnesium in the form of castings or machined work are not a severe fire hazard because they are hard to ignite When once ignited, however, the metal in the massive forms will bum vigorously Malathion (O.O-dimethyl dithiophosphate of diethyl mercaptosuccmate) is one of the organic phosphate insecticides Like the others of its class, its principal toxic action on warm-blooded animals is its inhibition of acetylcholinesterase It seems to be one of the least toxic of this type of insecticide In halation of 5 ppm (56 mg/cu m) by dogs and guinea pigs produced no effects except tears and a slight decrease m the plasma cho linesterase activity Maleic anhydride is an irritant to the skin and mucous membranes, especially in the presence of moisture Maleic anhydride does not usually cause an immediate burning sensa tion upon contact with the skin, especially if the skin is dry If not removed by washing, it will cause reddening and, occasionally, blistering, if the exposure is prolonged and severe Maleic anhydride dust and vapors are exceedingly irritating and severe acute expo sures are not voluntarily tolerated Upon in halation of dust or vapors, coughing and sneezing, together with burning and irritation of the throat may occur The eyes are par ticularly sensitive to the dust and vapors Maleic anhydride is not a serious industrial hazard provided workers are adequately in structed and effectively supervised in the proper handling of the chemical Employees should be instructed to report any signs of irritation or burning of skm, eyes, or mucous membranes Because maleic anhydride is a combustible solid having a flash point of 215 F, care must be exercised in handling and storage to keep it away from flame or spades Dust and the vapors from the molten product are also flam mable Manganese is found in a wide variety of minerals The dioxide is its most common in organic compound and is used as a chemical intermediate, enamel additive, and drier The probability of contracting manganese poisoning is low, but the effects are severe-- total disablement may result from a few months' exposure to high concentrations This effect, however, is more likely to occur after prolonged and repeated exposures above 30 mg/cu m The main hazard is usually from the inhala tion of manganese dioxide, which may pro duce neurological lesions The symptoms are many and are similar to Parkinson's syndrome Symptoms include weakness, instability, dif ficulty in walking, immobility of facial ex pression, monotonous and intermittent speech, spasmodic laughter, and other grotesque signs Exposures to finely divided dusts of man ganese dioxide may produce pneumonitis Mercury and its compounds are not nearly so widely used as are lead compounds and consequently mercury poisoning is not so well known nor so often seen as is lead poisoning Mercury metal is a liquid at room tempera ture with a vapor pressure high enough to produce poisoning if a considerable area of the metal surface is exposed to air If mer cury gets into the cracks of a wood or hie floor or into the pores of a concrete floor, the contamination may become so great as to necessitate leplacement or sealing of the floor before the plant or laboratory can be safely used again Although it cannot be removed, mercury can be sealed into such floors by covering them completely with an asphalt mastic, preferably after the vapor pressure of the mercury has been reduced by flooding 1153