Document zo6nNjn9RqGQ5e5G9zoMpOrM0

y- . Memorandum Concerning. ^ SAMPLING PEOGKAM AT LOWS BROTHERS PLANT Dust Hazard The same points studied in l ^ O should he resampled * Quarters added since 19^0 should be Included: Approximately 25-IfO electrostatic air samples 10-20 oust samples. . The study should Include chemical analysis to determine the level of contamination due to lead or any other pigment of known hygienic Importance. The need for the study of any pigment other than lead should be. determined from the frequency with which such pigments'areused, -their nature, and the manner in which they are handled-. (I.e. wet or dry). Some Safe Levels . Cadmium 1.0 mg./lO m 3 Lead Zinc {oxide) 1*5 mg./lO m3 150 Big./lO-3 Mercury 1.0 mg./lO m 3 Silica and dust count studies should be included if the materials handled warrant such studies. The latter need be done only If the exposures are prolonged and frequent. Solvent Exposure The number of samples required to determine the solvent hazard cannot be accurately fixed. This study wrill require close cooperation between the plant and the testing crew. The number of samples and the general nature of the solvent must be determined K 0003793 beforehand on the basis of the manufacturing schedule so that the field crew can.be properly equipped to take the necessary samples. It may be possible to confine the sampling to the more toxic solvents. It probably will be necessary to make several trips to Dayton in order to cover all of the more toxic solvents. This will require exact,information concerning the solvent ;, formulae used. Generally, the following points should be studied. Lacquer- Plant : Solvent hazard during mixing, thinning, and filling. The dust exposure if present should be included. Varnish Plant Exposures arising in the kettle operations (possibly acrolein) should be studied as well as the solvent exposure occurring In 'mixing, 'filtering, "and. filling operations. , Pump and Storage Room - Solvent hazard depending upon the solvents stored. Paint Remover Department Exposure to benzol and chlorinated hydrocarbons 0003784 J . Cholak q-l8-I|.6 Sonto Solvents and. Other Compounds of. Hygienic Importance (0i her fimjy .Xlic) 'which Kay be I?s o d In Paints*.Varnishes, Enamels, and'iaant Tolerance (Approx,V Acetone aB*S& 500 mh./js5 100Q Aniline (organic pigment) po-nsino (or StoddciYiV & solvent)' rJ 20 500 2000 Aonso! ' 100 V 200 Butanol (K) , ' ' Carbon T e t r a c h l o r i d e : 50 " . 100 200 500, Ethyl Acetate ' . li.00 . xGuQ Methyl'.Alcohol' 200 . - 2001 C h l o r i n a t e d hydrocarbons from 100+ . -- ' . Ethyl Alcohol 1000 2000 Amyl Acetate 200 . 1000 Xylol ' ' 200 500 Acrolein (produced ira varnish making;) 0,5 *1 Naphtha (coal tar) 100-200 200-500 Turpentine . . 100 500 Tolerancedata front * a Cook, Ind. Med, 2^, 956 (15U5). K 0003795