Document MM3vVM4yX2deoapZd8kO6EREa

ft _ -S.*- C. Enderji 1 C.<'<"* "i" ___ D. P. Glazier _ Plan. ;.i..nager _ Indust rial Hygiene SoBlfCt: SEMI-ANNUAL ASBESTOS SURVEY Inter Compare correspondence Fii# Code ...... 0 VIVO* Stamping & Assembly Dan .June 23, 1976 P ,, , *, . Trenton Chemical 453-C3-00 In compliance with Section 1910. 'Ha. f), of the OS HA Rules am! Regulations, the writer conducted an investigation of employee exposure to wirborne asbestos dust at the Trenton Chemical Plant during 'he month of May. The individual results of this survey are listed opposite the corresponding job or area location on the attached data sheets. It should be noted that samples (2), (23). i 3A>. 145) and '51) were obtained concurrently and immediately adjacent to air samples c illected by Mr. C. Fedoronko of the Michigan Department of Public Health during tii MIOSHA investigation conducted on May 20, 21 and 2o, 1476. While none of the air samples obtained indicate employee exposure in excess of the current OSHA permissible exposure level, some problems do exist in regard to compliance with the July 1, 1976, two fiber'cc OSHA standard. The Bipel press operations have continued to produce significant employee exposure to airborne asbestos dust. Borderline control exists at the *1 ar.d *2 Bipel presses, but employees stationed at the *3. -4 and "5 Bipel presses were found to have ashes: is exposures 'which are in excess of the July 1, 1976 allowable limit, it is evident that administrative controls such as placards have failed to adequately control airborne asbestos dust levels at the Bipel press work stations. Industrial Hyciene believes that enclosure of tie in dividual Bipel dry mix trays and scales in an exhaust ventilated hood w luld provide adequate control of airborne asbestos dust at the Bipels. This or another technically feasible engineering control measure which would provide uncontaminated air to the individual Bipel press operator's breathing zone should be investigated by the aopropriate plant personnel and discussed with this department prior to installation. Mandatory personal protective equip ment in the form of approved air purifying respirators '.ill provide temporary OSHA compliance under h-ehn l-MO. *3a, id). < 1). > i) during the time period r.ccessarv to install the required engineering controls. The employees stationed at :r.f- east and west disc brake loading stations on the Conforming Matrix was'- er were found to have asbestos exposures of 4. 2 and 4. 1 fibers per cubic centimeter of air. It is our understanding that / 5. C. Enders II Re: Semi-Annual Asbestos Surv , 6-23-76 the slot grind line ' "defuzze r s" will become operational in the near future. The "defuzzer" consists of a rapidly rotating cylindrical brush located in an exhaust ventilated enclosure. The "defuzzer" cleaning operej1.; >n is intended to remove the loose asbestos fibers which adhere to the brake shoe after the slot grinding and Hat finishing operations. The planned removal of these loose asbestos fibers should significantly reduc the magnitude of asbestos exposure at the Conforming Matrix washer and else where wht-n these parts trust be inspected, loaded or assembled by hand. The Industrial Hygiene Department will have to re-evaluate employee exposure at theConforming Matrix washer after the "defuzze rs ' become operational. If exposures remain above the July 1, 1`Mb limit, approved air purifying respirators will become mandatory personal equipment for the employees stationed at the washer during the time period necessary to install the required engineering controls. Note that air samples (21), (25) and 44) are also in excess of the July 1, 1976 two fiber/cc CSHA permissible exposure limit. These air samples do not represent time weighted average concentrations because they were not collected over an eight hour period. For example, air sample (45) weigh-up, which is a tirre weighted average or TWA, is below the new OSHA limit, while air sample : 44) weigh-up, which is not aTWA, is in excess of the two fiber standard. It is, therefore, evident that eight hour samples will be required at the Myr oven inspection operation and at the Mopar line packing operation in order to more accurately determine the magnitude of employee exposure at those job locations. Haphazard handling of asbestos waste and loose disc brake pad material appears to be a continuing problem at this facility. Vacuum cleaning of asbestos waste materials is required in order to prevent excessive airborne levels and vacuum cleaning equipment is evident throughout the plant, yet most employees appear reluctant to use this equipment. Employees were observed using brooms, gloves, rags and hands to clean up asbestos waste on numerous occasions during the course of this survey. It is the responsi bility of the plant management to explain the rationale behind the use of the vacuum cleaning equipment and to enforce its usage in those areas where failure to do so will result in elevated airborne asbestos levels. D. P. CllAZIER Industrial Hygienist Attachment T. r'. Harbour J. A. Lardie E. R. Lombard N. McCallum K. C. Mitchell V.'. M. O'Brien G. A. Sattelmeier Data Shoot TRENTON CHEMICAL ASBES-'' May I * 76 Location Current OSHA Standard July 1, 1^7t> OSHA Standard Friction Products Bmidirg (1) Pe r s o na 1 air sample, * l Bipel operator (2) Personal air sample, I Bipel operator (time-weigh: ed averag e concentration) (3) Personal air sample, 11 and * 1 2 hot press operator (4) Personal air sample, si. Bipel operator (5) Personal air sample, *3 Bipel operator (time - weighted average concentration) (6) Personal air sample, F4NBipel operator including cleanup operations (7) Personal air sample, H 1 5 and if 16 hot press operator (8) General air sample, i mmediately adjacent to the if 1 7 hot press (7) General air sample, i immediately adjacent to the' 3 Bipel press (10) Personal air ^ample, "5 Bipel operator including cleanup operations Concent ra1. ion Fibers, create r than five microns in icneth, per cubic centimeter of air) =u 0 .1.0 1.6 1. 5 1.0 l. 8 3. 9 2. 0 l. 0 0. 7 0. 2 3. 1 Data Sheet - continued II 'll) Personal air sample, *i 1 and 22 hot press operator (12) ,(13) Personal air sample, o Bipel operator Personal air sample, 7 cipel operator ar.d *26 hot press operator (14) General air sample, im; nedi-at.-ly adjacent to the *26 hot press (15) Personal air sample, 2 7 and *28 hot press operator (16) Personal air sample. =8 Bipel operator (17) General air sample. : mmediately adjacent to the *22 hot press (18) Personal air sample, *17 and *2? hot press operator ( 1 ?) Personal air simple, o Bipel operator during cleanup operations only (20) Personal air sample. 1 'i ling and unloading disc brake shoes at the Myr oven aluminum gasket bonding operation (21) Personal air sample. ::.spe. tine and packing disc brake shoes after Myr oven bonding, in cluding cleanup operations (22) Personal air samp'. . . i ;.p grinder operator *152774, M-jpar li. (23) Personal air sarnpl.-. <*152774, Mopar lir.-, . t concentration) p trinder operator weighted average oneent ra! ;on o. a 0. < 0. 7 0. 7 0. 2 0. 2 0. 7 0, 7 1. 1 0. 5 2. o 0. 4 0. 1 Ill Concent ration 12-4) Personal air sample, Mopar line, proof testing on machine ? 152775 (25) Personal air sample, packing drum brakes into cardboard boxes on the Mopar line (26) Personal air sample, sealing replacement part boxes on the Mopar line (27) Personal air sample, grinding drum brake s^ocs at the belt sandor which is adjacent to the overhead ovens (28) General air sample, directly adjacent to the =2 overhead oven at breathing /.one level (29) Personal air sample, loading the #1 overhead oven (30) Personal air sample, -1 slot grinder inspector (31) Personal air sample, -2 proof test and slot grind operator < 32) Personal air san-.ole, *2 slot grinder inspector (33) Personal air sample, ?3 proof test and slot grind operator 34) Fersor.al air sample. 3 slo* grind inspector (35) Ger.cx-al air sample, five feet northeast of the *3 proof test op-:ration (36) Personal air sample, ? 1 OEM grinder operator itime-u mghted average concentration) l. 1 0. 4 0. 7 0. 5 0. 2 <. 0. 1 1. 7 l. 3 1.0 < 0. 1 0. 4 00 o 00 Data Sheet - continued Loeaf ion (37) (38) Personal air sample, packing drum brakes on the "2 OHM line Personal air sample, ? 1 and *2 saw line operator (39) Personal air sample, unloading drum brake linings after oven forming at the #1 and t*2 saw lines (40) Personal air sample, aluminum gasket application (41) (42) Personal air sample, loading disc brake shoes into the west side of the Conforming Mat rLx '.Vasher Personal air sample, loading disc brake shoes into the ea.-t side of the Conforming Matrix Washer (43) \ 4-t) Personal air sample, -veigh-un and - l skip hoist loading Personal air sample, weigh-un ar.d -Z skip h ii.-*. loading (45) Tv.-rsor.al air sample, weigh-up only i.ti me - weighted a\ e rage c onontration) (4n) Personal air sample, loading the "1 skip hoist (time-weighted average c oncent rat ion) (47) Personal air sample, unloading the *4 lodiqe (time-weighted average con< ent ration) (48) Personal air sample, unloading the *4 lodige mixer IV Coucenl vut on 0.7 1.2 0.2 0. 5 4. 1 4.2 1.0 2. 3 1.2 0. I 0. 3 0. 7 Sheet - continued Location (-P) (50) Persona! air -ample. Tennant sweeper i_ pernor Personal air sample, janitor, cleaning rest r >oms and skip hoi>t area Chemical Building (51) Personal air sample, loadinu' f 1 io Day blender with resin grade asbestos (52) Personal air sample, leading the Day blender with Union Carbide 244 resin grade asbestos (20 bags) (53) Personal air sample, loading she* 1 Readco blonder V Concent ration 0. 1 .2 0. * 0.-I 0.5 All determinations of airborne asb< sto< fiber concentrations were made by the Industrial Hygiene Laboratory using the OSHA dictated membrane filter method at a magnification of 4:9x with phase contrast illumination.