Document qVdNq9DNZnN6w9pynpjJ2G8M

Source * Material * Date collected * Inspection made by Method of collection: Required: Magnus Metal Division of national Lead Company, 1029 Vest Seventh Street. Cincinnati, Ohio - Fumes and dust collected from the atmosphere of the plant 1-16-59 Mr. L. J Schafer and Mr* D W Yeager, The Kettering Laboratory for Dr. M. Zavon, Bureau of Industrial Health, Cincinnati Health Department Electrostatic precipitator Determination of the concentration of lead in the air The Plant During the past year, mechanized equipment for production pouring has been installed in this plant. A roller conveyor transports the molds to a central ventilated pouring station and then to a ventilated shake-out station vhere castings are removed from the molds The recovered molding sand is then conveyed to an exhausted mixer, and the reconditioned sand is returned to the molding machines. Most of the production is carried out on the mechanized equipment, but molds prepared by one machine, vhlch has not yet been adapted to the mechanized production line, vere being poured in the open. Except for the use of the mechanized production line, the plant vas being operated in the same manner as it vas at the time of our last visit. Results Table #1 records the concentrations of lead found at a number of locations vithln the plant. Kt ? 0005331 XAgnus Metal Divieion national Lead Company 2. Discussion The day of this visit vas unusually cold, and consequently all vindovs and doors were kept closed. Since there vas no ventilation in the roof or ceiling, the density of the fume appeared to Increase as the vork progressed during the day. The results of our tests shov that the levels of concentration of lead in the atmosphere exceeded those considered satisfactory for this type of operation. While the ventilation of the mechanized production line collects a considerable portion of the lead fume produced in the pouring activities, the fumes and dust produced by other uncontrolled activities accumulate and build up the concentration to levels vhich are hazardous. Recommendations 1. Steel covers should be provided for the ladles to prevent escape of fume. If practical, covered ladles of the commercial type should be employed. A more positive control of fume from this source is provided by an exhaust hood vhich can be fastened to the bars of the electrified monorail crane used to transport the ladles to the pouring stations A flexible tube, connected to a fan mounted on the trolley, can then be used to discharge the fume tovard the oelling* 2. Flanges or short curtain vails should be installed about the suction opening of the pouring station on the mechanized production line. The flanges or vails vlll restrict the suction and force the air to pass over the flask into the opening. K f 0005332 3. The housekeeping vithin the plant should he Improved* The dust vhleh accumulates on floors and equipment should he removed periodically so that traffic and vibrations do not redisperse dusts into the atmosphere* 4. The general ventilation of the plant should he improved hy the strategic location of a number of roof or ceiling fans* 5* The areas in vhleh. scrap is being handled should be ventilated. Bust produced in these areas contaminate other ares and should be controlled by providing proper local exhaust at locations vhere dust is most likely to he produced. From The Kettering Laboratory in the Department of Preventive Medicine and Industrial health College of Medicine, University of Cincinnati Cincinnati Ohio March 5# 1959 KF 0005333 Concentrations of Lead in the Air at a Number of Locations in the Plant of the Magnus Metal Division of the National Le Analysis Number Description Date Start of Sampling 59A-601 Breathing sone - while #4 Schwartz furnace was being charged with scrap* 1-16-59 10 t oo a.m 59A-602 Breathing zone - while molds were being poured at pouring station 1-16-59 10*12 a.m 59A-603 Breathing zone - at the Schwartz furnace, while two ladles were being filled with molten metal* 1-16-59 10*30 a.m 59A-604 General air - in the aisle 10 feet behind the ventilated pouring station. 1-16-59 10 *50 a*m 59A-605 Breathing zone - at the scales while scrap was being weighed for remelt. 1-16-59 11*10 a.m 59A-606 Breathing zone - while a reelaiming kettle was being filled with babbit metal* 1-16-59 11*10 a*m 59A-60T Breathing zone - while metal was being poured in the unvented pouring area . 1-16-59 11*28 a.m 59A-608 Breathing zone - while metal was being poured in the unvented pouring area* 1-16-59 11*40 a.m 59A-609 General atmosphere - in center of foundry approximately 1-16-59 12*00 N 100 feet from the furnace area* 59A-610 Breathing zone - while metal was being poured in the finishing room* 1-16-59 1*40 p*m* 59Ai"6ll Breathing zone - at the broaching machine in the finishing room. 1-16-59 1*55 p.m* Note t Respirators were worn by all men at the above operations except in the fini Kettering Laboratory Eden and Bethevda Avenues - Cinti. 19,Ohio 4-13-195$ 12 *H* For: Analysis of Fames end Dust Samples Collected from Atmosphere of Metal Foundry of Magnus Metal Division of national Dead Company for the Determination of the Concentration of Dead in the Air $133.00 Kettering Laboratory Robert A. Kehoe, K.D KE 0005335 Director -gnus Metal Division of National Lead Company, Cin< Analysis 4 Number 56A-2175 5A-2176 56A-2 177 Description Between #1 and #2 Pouring Bays on casting floor while follow ing metal pourer during cast ing operation. In main aisle near ''sand filler." General area of finishing roomj molten babbit metal being handled. Date i+-- J4.-9 -5 6 Millions of Particles per Cubic Foot of Air nn&ti, Ohio - tL - Start of Sampling 9 sIi.6 A.M. Duration of Sampling in Minutes k5 Pb Mg./M8 MPPCF# 1.98 10:00 A.M. 10:05 A.M. 5.5 5-75 O.Oij. 0 .0 7 2.0 i / ' `^orceV vV U V. '' ^terial: *s,- Dn.ates Collected: V\is'; Inspection made by; Magnus Metal Divison of National Lead Company, 1029 West Seventh Street, Cincinnati, Ohio Fumes and dust collected from atmosphere of metal fou Dr. M. Zavon, Bureau of Industrial Health, Cincinnati Department, Mr . J. Cholak and Mr. L. J. Schafer, Kett K 0005337 Method of Collection; Electrostatic Precipitator (2*5 cfm.) Required: Determination of the concentration of lead in the air Anklysis Number 56A-2029 56A-2093 Results Description At #1+ melt out furnace, while pouring babbit (8 8 ^ lead) into molds and while dipping out furnaces. At Magnus station # 3 . In charging aisle of the Schwartz furnace area (brass). Date l4.-lj.-5 6 ij.-ij. -5 6 Start of Sampling 2:12 P.M. 2:20 P.M. Duration of Sampling in Minutes 4-75 3.0 5A-209i|. 56A-2095 At Magnus station #3 on pouring side of Schwartz furnace while filling one pot (brass). At scales while loading and weighing scrap journals for remelting. ij.-ij.-5 6 ij.-ij. -5 6 2:2? P.M. 2:lj.O P.M. 2 .5 5.0 56A-20 96 At shake out in journal area. No metal pouring, sand being handled. ij.-lj. -5 6 2:1+5 P.M. 45 56A-217ii- Between #1 and #2 Pouring Bays on casting floor. Before pouring. ij.-9 . 5 6 9 :1+0 A.M. 4*5