Document bo9XyReeeNLgjQw47vyKJ236

REPORT OF A PRELIMINARY SURVEY OF THE BRASS FOUNDRY OF THE SCHAIBLE COMPANY CINCINNATI, OHIO From the Kettering Laboratory In the Department of Preventive Medicine and Industrial Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio H 0018570 Material* Source : Method of Collection! Date of Collection: Required: .\ Air Samples Brass Foundry of The Schaible Company, 2620 Cook Cincinnati, Ohio Electrostatic precipitator, MSA carbon monoxide November 13> 1952 Concentrations of lead, zinc and carbon monoxide dust counts Results Analysis Number 52A-7680 52A-768I 52A-7682 52A-7683 52A-7681+ (A) Location On charging platform between #8 and #9 furnaces Temperature Time of at Location Sampling' F 9:1+5 am 90 Between furnace platforms 9:55 am - On charging platform between #5 and #6 furnaces 9:1+5 am 100 While skimming (three 10:10 am ladles) - On charging platform of Roda furnace While casting on #1+ roller conveyor (up wind from fume) 10*00 am 10:20 am 120 73 Mgs . metal per cubic meter of air Lead Zinc 0,36 2.60 - 1.00 - 6.00 2.03 1.18 . O.72 11.80 9*90 6.10 Mill parti cubi of Analysis Number 52A-7684 (B) ?2A-7o85 ?2A-786 ?2A-7 87 )2A-7 88 32A-7689 52^-7690 )2A-7691 J2A -7711 I2A -7712 Location While casting on #4 roller conveyor (in path of fume from ladles) Time of Sampling 10525 am While casting on large 1015 am power mold conveyor At shake-out on #4 roller conveyor 10:35 am At shake-out between the two power mold conveyors 10;30 am* In area between mold 10;50 am ing machines #1 and#2 In area near molding 10:50 am machine #l6 In grinding room near 11:20 am drinking fountain In core cleaning area in core room Dust removed from pipes in core room near molding area 11:05 am Dust removed from rafter in center of casting area (a) Crystalline silica = 50^ Temperature at Location op 75 74 76 76 ** 71 80 - " Mgs . metal per cubic meter of air Lead Zinc 2.54 40.80 Mill parti cubi of 0*67 0.4l 0.40 6.45 3.70 5.54 0.31 O.065 0.145 0.100 0.63^ 0.62^ 2.13 0.26 0.88 O.75 2.59^(a) 6.29^(b) (b) Crystalline silica = 2 Analysis Number location Area in front of furnaces (pouring area) Time of Sampling 11:30 am Temperature at Loc 0 cd Mgs. metal per cubic meter of air Lead Zinc 3- - Millions of particles per cubic meter of air Carbon Monoxide (parts per million) 25 -b - Remarks 1. Dust counts yielded fewer than 5 million particles per cubic foot at the core making,shake-out, molding, and grinding operations which were investigated on November 11* No samples were collected in the "Wheelabrator1' area or in other areas where sands are processed for use, A situation involving 5 million particles per cubic foot of air is considered safe where dusts containing more than 75 per cent of free silica are being handled. 2. All concentrations of carbon monoxide determined during this cycle of operation were at or below the value of 100 p.p.m* considered satisfactory for regular Industrial exposure of 8 hours duration per day. 3* The concentrations of lead in the atmosphere at all stations except in the core room and near molding machine #16 equaled or exceeded the concentration of 0.15 mg. per cubic meter of air which is generally considered to be the maximum concentration which should be permitted in workrooms in which men are employed regularly for 8 hours daily. Except for samples 7689 7^9*-* and * 769T the concentrations of lead in the atmosphere exceeded the generally accepted safe level by factors varying from 2.1 to 17. The conditions with respect to lead exposure, therefore, are hazardous, if men are exposed to them over sufficiently prolonged periods of time. ij.. Only one result on zinc (sample B) exceeded the value of 15 mgs. per cubic meter of air which is generally accepted as satisfactory for industrial exposure, 5* The levels of lead or other contaminants found are repre sentative only of one dayfs operations. The conditions which prevail generally and regularly could be appraised only by -5repeated analyses of the atmosphere under a variety of operating conditions. Recommendations 1. An engineering survey should be made to determine the best means for reducing the concentrations of the toxic materials in the atmosphere to safe levels. Such a survey would involve additional air sampling and analysis to determine the nature of the air entering the building, within the building, and discharged from the building. By reducing the amount of lead in the air to a safe level, safe conditions with reference to other toxic fumes . and gases will also be provided. 2. Periodic determinations should be made of the levels of lead concentration in the urine and blood of all exposed persons. A medical program involving pre-employment and periodic exami nations should be tied in with this sampling program. Such a program also would involve considerations concerning the proper use and type of personal protective devices, the improvement of housekeeping, the provision of*an adequate locker room, wash room and eating room. Prom the Kettering Laboratory in the Department of Preventive Medicine and Industrial Health, College of Medicine, University of Cincinnati, Cincinnati, Ohio Work and report by: J, Cholak L. J. Schafer D, Yeager Date: December 1, 1952 Approved: Robert A. Kehce, M.D. Director