Earl Warren

“ The risk is 'very great' and even exists outside the plant because the lead dust and lead fumes which are prevalent in the plant attach themselves to the skin, clothing and hair of the employees. Even the families of battery workers may be placed in some danger if lead particles are brought home in the workers' clothing or shoes. Sulphuric acid in the plant is also a hazard. It is irritating to the skin and can cause severe burns. When the acid contacts clothing, it causes disintegration or rapid deterioration. ”

“ The petitioners own and operate a plant where they are engaged in manufacturing automotive-type wet storage batteries which they sell in interstate commerce. All of the production employees, such as those with whom we are here concerned, customarily work with or near the various chemicals used in the plant. These include lead metal, lead oxide, lead sulphate, lead peroxide, and sulphuric acid. ”

“ Lead and its compounds are toxic to human beings. Regular exposure to atmosphere containing 1.5 milligrams or more of lead per 10 cubic meters is regarded by the medical profession as hazardous and involving the possibility of lead intoxication or lead poisoning. ”

“ In the manufacturing process, some of the materials go through various changes and give off dangerous fumes. Some are spilled or dropped, and thus become a part of the dust in the air. In general, the chemicals permeate the entire plant and everything and everyone in it. ”

“ In battery plants, such as this one, it is 'almost impossible,' it was testified, to keep lead concentration in the air 'within absolutely safe limits,' and in petitioners' plant 'lead oxide was on the floor and in the air and on the plates which employees handled.' Abnormal concentrations of lead were discovered in the bodies of some of petitioners' employees, and petitioners' insurance doctor recommended that such employees be segregated from their customary duties. The primary ways in which lead poisoning is contracted are by inhalation and ingestion ”

“ Accordingly, in order to make their plant as safe a place as is possible under the circumstances and thereby increase the efficiency of its operation, petitioners have equipped it with shower facilities and a locker room with separate lockers for work and street clothing. Also, they furnish without charge old but clean work clothes which the employees wear. The cost of providing their own work clothing would be prohibitive for the employees, since the acid causes such rapid deterioration that the clothes sometimes last only a few days. ”