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G. llcEendry Project Analysis Highland Park Director-Plant Ingireering Corporation Hfg. Staff Russell Street Office / Dececber 18, 1956 / / siren, isebcts or project.bewuesi res bMxz.lisiks fabrication at ciclet^d/ e wish to advise that we hare ehecked into the safety aspects of the subject Project Request, and have discussed the industrial hygiene problems with Don Fowler. In our opinion, this Request provides for the aechanieal features, such as ventilation, sprinkler protection, and earbon dioxide systems that are required to sake a safe operaiion. The Industrial Hygiene Depart ment informs us that they have no objections to the installation. In general, the operations that will be performed in the proposed brake lining set-up are very similar to sxisting operations and hazards in the Cycleweld cement production. JvRiab ee: L. A. Churgay D. G. Fowler Lf U File Memo Plant: Eldon Avenue Axle Plant Subject: Exhaust Ventilation and Dust Concentrations - Depart ment 78, Brake Shoe Grinding Date: March 25, 1968 On March 25, 1968, the exhaust ventilation system of the brake shoe grinders in Department 78 was surveyed. Also, samples were collected to determine air-borne asbestos dust in the breathing zones of employees operating the grinders. The results obtained are listed on the attached data sheet. The duct velocities recorded at the time of the survey ranged from 7500 to 11,000 feet per minute. It was determined that the quantity of air exhausted at a belt sander provided with a duct 3% inches in diameter was 435 cubic feet per minute (cfm) and the quantities of air exhausted at three Excello Brake Shoe Grinders provided with ducts four inches in diameter ranged from 745 to 960 cfm. We were informed that the grinding wheel diameters as purchased are six inches and widths are either 2 3/4 or 3 i inches. The width of the belt for the belt sanders is six inches. It was observed that the wheels were well enclosed and indraft face velocities ranging between 2800 to 5800 feet per minute were measured at the brake shoe grinders. Air-borne dust concentrations obtained in the breathing zone of employ ees operating the brake shoe grinders ranged from 0.2 to 1.4 millions of particles per cubic foot of air. This indicates that the present exhaust ventilation system# provides adequate control of this air-borne contaminant. Information taken from the Centri-Spray Wet Dust Collector Serial No. AW 53861359A name plate indicates that the capacity of the collector is 10,000 cfm air and handles a volume of 1850 gallons of water. There are twelve machines in this location, four of which are belt sanders for repair only, and the remainder are production brake shoe grinders. At the time of this study the belt sanders were not utilized for any length of time. Also, only four operators were performing brake shoe grinding operations. LR: hm cc: N. A. Trombley L. Redmond Data Sheet Elc'on Avenue Axle Plant Exhaust Ventilation Location Duct Velocity Feet Per Minute Volume Cubic Feet Per Minute Department 78: Brake Shoe Grinders - Bay R-15 through Bay R-19; XLO Machine #550134, 4" diameter XLO Machine #550141, 4" diameter XLO Machine #550136, 4" diameter Repair Belt Sander, 3.25" diameter 9000 11,000 8500 7500 785 960 745 435 The above readings were obtained with Alnor Velometer, Type 3002. Dust Concentrations Location Threshold Limit value Department 78: XLO Machine #550134, XLO Machine #550135, Repeat sample XLO Machine #550136, Repeat sample XLO Machine #550141, breathing breathing breathing breathing zone zone zone zone sample sample sample samp le Millions of Particles Per Cubic Foot of Air 5.0 0.2 0.6 0.5 1.6 1.2 0.2 The above samples were collected with Mine Safety Appliances Company Midget Impinger Flasks and Pump. Total Weight of Dust Location Department 78: XLO Machine #550135 XLO Machine #550141 Milligrams Per Cubic Meter of Air 1.2 0.8 The above samples were collected with a Unico Model 30 Pump using glassfiber filters. t Hr. K. M. Hayes Manufacturing Mgr Chemical Div Mr. L. Redmond Indust. Hygiene Alfl-BOfiWB AS8SS7VS DVST SXHG&TMTim.^-DEPARTMENT-7ZQQ May 27, 1963 Trenton Snginf Highland Park As requested on May 22. 1963, samples were collected to determine the air-borne asbestos dust concentrations created by the sawing and forming of brake linings. The exhaust ventilation system was also checked at this time. j. The results obtained, which are listed on the attached sheet, indicated that the dust concentrations were at acceptable levels and that the exhaust ventilation system was functioning properly. LR:slh cc: B. J. Sauber, M.D R. H. Weidner Louis Bedmo Senior Industrial Hygienist pm jgflfigr ASfi-BQfifflE A8QSS.TPS CCKCmRATIOKS fkA'i ^ 3 iQCMtlflB Threshold limit val^e At #1 saving machine - removing brake shoes At #2 saving machine - removing brake shoes At both Bolling Machines Results in Millions of Particles Per Cubic Foot Pi .Air. ------------------------------ 5.0 0.4 0.3 1.0 The above samples were collected vith a Mine Safety Appliances Company's Midget Xmpinger. Location At #1 sawing machine At *2 sawing machine YflBtilMtiPa Results in Feet POT MiOUtfl----------- 500 - 1100 700 - 1200 The above measurements were made with an Alnor Velometer. Serial #2100. xaaa PLANT ANALYSIS FOR /) S>Q-~ DATE TAKEN BY Z <S . <r- -3 - i-'