Document VG48xvGym8ZkXnnNNL2ZLZ7jw

FILE NAME: Abex (ABX) DATE: 1960 Oct 21 DOC#: ABX123 DOCUMENT DESCRIPTION: Liberty Mutual Insurance Co. Report - American Brake Shoe Company, American Brakeblok Division - Survey of Asbestos & Lead KAZ 001153 I AA3RICAB BRAKE SHOE CCWPAHT AMERICAN SHAKE BLOK DIVISION WINCHESTER, VIRGINIA SURVEY OF ASBESTOS ASD LEAD submitted by S.T. VAGUER INDUSTRIAL HYGIENIST OCTOESB 21, I960 LIBERTY MUTUAL INSURANCE COMPANY SPNY 007347 KHALL01154 KAZ 001154 AMERICAN BRAKE SHOE COMPANY AMERICAN BRAKE BLOK DIVISION WINCHESTER, VIRGINIA SURVEY OF ASBESTOS AND LEAD On September 20 ana 21, i9 6 0 , air sanpllng was conducted to evaluate the changes In the dust exposures since the last survey In June 1959. The teniptrattire 3nxing the survey overagfed V75 degrees F vlth rather high humid lty and the plant was "open". Production was slightly below normal. 1. Isiproved ventilation for Wet Compounding operations reduced the aver age asbestos duat level from 1.0 to 2 .U million particles per cubic foot. This value Is veil belov the hygienic standard of 5 Billion partlcleB per cubic foot. 2. Excellent control of the lead dust exposure baa been achieved st "Dry Compound" weighing. Lead concentrations were reduced from a.33 to 0.01 . milligrams per cubic meter. 3. The health baiard from lead dust during Preforming is still veil con trolled. I*. The Allis Chalmers Pulverator (hog) may eventually produce a signifi cant exposure to lead because of the leaks at the Roto Clone. We would like to thank Kr. C. B. Mallory, Works Manager, and Hr. W. H. Baker, Personnel Manager, for the active. Interest and cooperation that vaa shown to us during this survey. SW:na Industrial Hygienist Loss Prevention Dept. - LIBERTY MUTUAL INSURANCE COMPANY SPNY 007348 KHALL01155 KAZ 001155 DISCUSSIOH Completion .of the recommendation submitted as the result of the June 1959 survey has achieved excellent control of airborne asbestos and lead. As indicated by the data sheets, the environmental exposure to dust is well below the established hygienic standards, - MBT.COMPOUXD- Throughout the entire cycle of asbestos-handling, the dust level was constantly' below-the .safe,-llmit ofv5 million particles.^.This,reduction was accomplished through improved, ventilation and tbe_ results of.,air sampling confirm this improvement, ' * th " . *> V ** . C` ,30325283^ x The expoau/a from lead dust is* now negligibls since the operation was changed and exhaust ventilation improved. The lead concentration during the entire work cycle was 0.01 milligrams. This is far below the established safe limit of 0.2 milligrams of lead per cubic meter. . Improved ventilation at the mixer reduced the dust level from 0.18 to 0,002 milligrams of lead. As a result, a borderline health hatard no longer crisis. BLOK FIWISHIKQ With continued operation, the Allis Chalmers Pulverator (hog) may produce a slight borderline health .hatard. A-concentration of 0.08 milligrams of lead . was encountered'after six minutes of operation. The hog Itself wan adequately 'exhausted but the Roto Clone oollector leaked at doora and panels.' Improved gasket material should eliminate this condition. The charge in the exhaust hood on the automatic: burr and chamfer machine reduced the dust level from 0,06 to 0,01 mil.llgr.ama .per cubic meter. .GEHERAL CCMKEXT5 The. Torit Duet Collector at automatic 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. MUTUAI! jlhiSURAWCMCOMPANY SP N Y 007349 J KAZ KHALL01156 001156 RECOMMEHDATIONS 1, Housekeeping In the urea 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 Pulrerator (hog) should be replaced because visible dust was cooing from the collector luring operation of the hog. LIBERTY MUTUAL INSURANCE COMPANY S P N Y 007350 KHALL01157 XAZ 001157 DATA. AIRBORNE ASBESTOS DUST Hygienic Standard: 5 Billion particles per cubic foot of'air (KPPCf). ` Method of Collecting: Willson pimp with iapingers and collected at a rate . of 5 liters per minute in distilled water. Method of Analysis: The samples were counted microscopically by the light field technique using a Spencer.Bright Line'Haemocytometer Counting Ceil. - Sample # 1 2 3 4 5 Date 8/20 9/20 9/20 9/20 9/20 Tine Department - Location I960 MPPCF 4:35 PM 45 min. Wet Compounding Breathing tone 1.6 during weigh up. 4:35 PM Wet Compounding General room at 0.8 45 min. weigh up area. 5:23 PH 45 min. Wet Compounding Breathing tone at 2.7 No.l hopper to ' Lancaster. (gasket leak) 5:23 PH Wet Compounding Breathing tone 4.6 45 min. at Ko. 2 Hopper to Lancaster. 7:00 PM 38 min. Wet Compounding General room at .1.7 floor lerel at ' No.l Lancaster. 1959 Mppcr 4.8 -- 6.0 1 3 .1 6 9/20 7:00 PM 38 Min. Wet Compounding General room at 3.1 3.? * floor level at No, 2 Lancaster. LIBERTY MUTUAL INSURANCE COMPANY SP N Y 007351 k HALL01158 KAZ 001158 DAIA . A7BBG3NE LEAD Hygienic Standard: 0.2 at.LH5Tf.36 lead per cubic meter of air (HgPb/Cu.K) Method of Collecting: Willson, pur.p, Filter paper collecting cone, collected at a rate ol 26 liters per minute. Method of Analysis: Dlthlrone and read on Beckman Spectrophotometer. Sample Mo. 1 2 ' Date 9/21 9/21 Time Department 10:00 AM Dry 30 min. >Compound 10:30 AH Dry 1*0 min. Compound Location I960 MgPb/CuM Breathing tone 0,01 at velgb scale. Breathing tone 0.01 during entire veigh cycle and' vithdraving from bins. 1959 MgFb/CuM **-33 3 9/21 1:U5 PH Blok Breathing tone at 0.08 6 trio. Finishing Allis Chalmers Pulverator (hog) L 9/21 2-.U5 IH Blok Breathing tone at 0.01 0.06 30 sin. Finishing automatic burr and chamfer. Exhaust Improved. 5 9/21 2:23 PM Pry Breathing tone at 0.002 0.18 30 min. Ccatpound mixed drop. Ex haust Improved. 6 9/21 3:05 PM Preforming Breathing tone 0.02 O.03 30 min. at press Bo.26 7 9/21 3:35 PM Preforming Breathing tone 0.02 0,0* 35 min. at press Ho.30 -LIBERTY MUTUAL INSURANCE COMPANY SPNY 007352 KAZ K H A U - 0 - n 59 001159