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FILE NAME Brakes BRK DATE 1960 Oct 21 DOC BRK178 DOCUMENT DESCRIPTION Unpublished Report - Survey of Asbestos and Lead AMERICAN BRAKE BLOK WINCHESTER VIRGI: WINCHESTER WINCHESTER WINCHESTER . cf . C OF ASPESTOS AID LEAD | a oe en,2 LOSS PREVENTION DEPARTMENT KAZ - 001153 AMERICAN BRAKE SHOE COMPANY AMERICAN BRAKE BLOK DIVISION WINCHESTER VIRGINIA SURVEY OF ASBESTOS AND LEAD SUBMITTBEY D~ S.T. WAGNER INDUSTRIAL HYGIENIST OCTOBER 21 1960 , LIBERTY MUTUAL INSURANCE COMPANY SPNY 007347 KAZ KHALL01154 001154 AMERICAN BRAKE SHOE COMPANY AMERICAN BRAKE BLOK DIVISION WINCHESTER VIRGINIA SURVEY OF ASBESTOS AND LEAD On September 20 and 21 1960 changes in the dust exposures temperature during the survey ity and the plant was open air sampling vas conducted to evaluate the since the last survey in June 1959. The averaged 75 degrees F with rather high humid- Production was slightly below normal " CONCLUSIONS 1. Improved ventilation for Wet Compounding operations reduced the average asbestos dust level from 7.0 to 2.4 million particles per cubic foot This value is well below the hygienic standard of 5 million particles per cubic foot Excellent control of Compound weighing milligrams per cubic the lead dust exposure has been achieved at Dry Lead concentrations were reduced from 4.33 to 0.01. meter 3. The health hazard from lead dust during Preforming is still vell con- trolled 40 The Allis Chalmers Pulverstor hog may eventually produce a signifi- cant exposure to lead because of the leaks at the Roto Clone We would like to thank Hr C. B. Mallory Works Manager and Mr. W. B. Baker Personel Manager for the active interest and cooperation that shown to us during this survey was STW : Hamer Industrial Hygienist Loss Prevention Dept. LIBERTY MUTUAL INSURANCE COMPANY SPNY 007348 KAZ KHALL01155 001155 DISCUSSION Completion has the of the recommendation submitted as the result of the June 1959 survey achieved excellent control of airborne asbestos and lead As indicated by data sheets the enviromental exposure to dust is well below the established , hygienic standards HST COMPOUND- Throughout the entire cycle of asbestos handling the dust level was constantly bel theosaw fe limit of million parti Thic s rl edue ctis on was accomplished through improved ventilation and the results air sampling te confirm - this vee , : improvement . . w Bas th. * . omy COMPOUND COMPOUND W and a DRY COMPOUND t- 7 yw . . kr swe? ,t bee, a exposure The exposure from lead dust is now negligible since the operation was changed and local exhaust ventilation improved The lead concentration during the entire work cycle was milligrams This is far below the established safe limit of . 0.2 milligrams of lead per cubic meter level from Improved ventilation at the mixer reduced the dust 0.18 to 0.002 milligrams of lead As result a borderline health hazard no longer exists BLOK FINISHING With continued operation the Allis Chalmers Pulverator hog may produce a health hazard alight borderline concentration of 0.08 milligrams of load . was six mimates of operation The hog itself was adequataly encountered after exhausted but the Roto Clone collector leaked at doors and panels Improved gasket material should eliminate this condition The change in the exhaust hood on the automatic burr and chamfer machine reduced the dust level from 0.06 to 0,01 milligrapmesr cubic meter . GENERAL COMMENTS The Torit Dust Collector at mitomatic Strip Finishing has been exhausted directly out of the department This will prevent contamination of the work area should the filter tear or leak ; LIBERTY_ MUTHAU INSURINA SURANCEM N COCMPEANMY > Me SPNY 007349 KAZ KHALL01156 001156 RECOMMENDATIONS 1 Housekeeping in the area of the weigh scale at Wet Compounding should be improved to remove floor spillage and accumulations of asbestos ' 2. The gaskets on the Roto Clone on the Allis Chalmers Pulverator hog should be replaced because visible dust was coming from the collector during operation of the hog LIBERTY MUTUAL INSURANCE COMPANY . SPNY 007350 KHALL01157 KAZ 001157 DATA AIRBORNE ASBESTOS DUST Rygienic Standard 5 million particles per cubic foot of air MPPCF Method of Collecting Willson pump with impingers and collected at a rate of 5 liters per minute in distilled water Method of Analysis The samples were counted microscopically by the light Bright field technique using a Spencer Counting Cell Line Haemocytometer . Date 8/20 9/20 9/20 9/20 fel 8 ae 4:35 45 4:m35inPM PM 4:35 min Department Location Wet Compounding Breathing zone during weigh up 1960 MPPCF , 1.6 Wet Compounding General room at weigh up area 0.8 * Wet Compounding Breathing zone at ~ No.l hopper to Lancaster gasket leak 2.7 Wet Compounding Breathing zone at No. 2 Hopper to Lancaster 4.6 1959 MPPCF 4.8 -- 6.0 -- 9/20 Wet Compounding General room at Door level at No.1 Lancaster .1.7 13.1 9/20 Wet Compounding General room at floor level at No. 2 Lancaster 3.1 3.7 LIBERTY MUTUAL INSURANCE COMPANY SPNY 007351 KAZ KHALL01158 001158 DATA AIRBORNE LEAD Hygienic Standard 0.2 milligress lead per cubic meter of air MgFb Cu.M Method of Collecting Willson rump Filter paper collecting cone at a rate of 26 liters per minute collected Method of Analysis Dithizone and read on Beckman Spectrophotometer Sample No. 1 Date Time Department 9/21 10:00 AM 30 min Dry ' Compound Location Breathing tone at veigh scale 1960 1959 Cum = MgPb CuM 0.01 . 4.33 4.33 2 9/21 10:30 AM Dry Breathing zone 0.01 --- 40 min Compound during entire weigh cycle and withdrawing from bins 3 9/21 1:45 PM Blok Breathing zone at 0.08 wee 6 min Finishing Allis Chalmers Pulverator hog 4 5 9/21 2:45 PM 30 min 9/21 2:28 PM 30 min Blok Finishing Breathing zone at 0.01 automatic burr and chamfer Exhaust improved Dry Compound Breathing zone at mixed drop Exhaust improved 0.002 0.06 0.18 6 9/21 3:05 PM Preforming Breathing Lone 0.02 30 min - at press No.28 7 9/21 3:35 PM Preforming Breathing zone 0.02 ~ 35 min at press No.30 0.03 0.09 LIBERTY MUTUAL INSURANCE COMPANY SPNY 007352 KAZ 001159