Document o9d6q7jje55REOd85nY5jo8YD

Inter Company correspondence rile Cede O.ii* Te^Heme A Department ____ June 30, 1977________ Omtion Puni/Oflic* " CIMS NunMi Stamping & Trenton s, r. PnriorsPlant-Manager--------------------------- Assembly.. . ..Chemical Prem--Name A Department Division Piani/OM'Ct Employee 4 Chrysler D. P. Glazier_____ Industrial Hygiene____ ___ Indus.Relat. _ Center _ ... 453.-C. CiMS Number 417-05-1 During April and May 1977, the writer conducted the OSHA required semi-annual asbestos survey at the Trenton Chemical Plant. The results of this study are listed on the attached data sheets opposite the corresponding job or area location. The air samples identified with an asterisk on the data sheets were collected concurrently and immediately adjacent to air samples collected by representatives of the Michigan Department of Public Health (MIOSHA). Note that only air sample (29) is in excess of the two fiber per cubic centimeter Permissible Exposure Limit. Industrial Hygiene recommends that "pad only" inspection operations be equipped with local exhaust ventilation. We feel that a downdraft system similar to the OEM grinder inspection ventilation would be feasible at the "pad only" inspection work stations. Personal protective equipment in the form of approved dust respirators is now required at the "pad only" inspection operations during the time period necessary to install the necessary engineering controls, CFR 1910.1001 (d) . In regard to employee notifi cation, CFR 1910.1001 (i)(3). Industrial Hygiene does not believe that any notification of excessive exposure is re quired because the affected individual (R. Smith 4414) was wearing an approved respirator at the time of this survey. Although air sample (24) was not in excess of the Permis sible Exposure Limit, it was of sufficient magnitude to generate a second MIOSHA evaluation on May 25, 1977, i.e., air sample (28). The elevated airborne asbestos levels observed on April 12, 1977 at the Mvr oven aluminum gasket inspection and packing operation may have been partially caused by pedestal fans dispersing asbestos dust into the aluminum gasket inspection area from the adjacent Tennant sweeper dump station. Industrial Hygiene recommends that the Tennant sweeper dump station be relocated in a less congested area of the plant. If relocation of the dump station does not reduce the airborne asbestos levels at the Myr oven pack ing and aluminum gasket inspection work station, additional controls such as local exhaust ventilation will have to be evaluated. S. C. Enders June 30, 1977 Page 2 Re: SEMt-ANNUAL ASBESTOS SURVEY Please be advised that OSHA Regulations, CFR 1910.100 (f)(2)(ii), require additional monitoring at any new work stations where exposure to asbestos may reasonably hi foreseen to exceed the Permissible Exposure Limit. hm Attachments F. Andre D. Benson A. Burnett E. Harbour C. Hill C. Lancucki R. Lombard N. McCallum W. M. O'Brien G. A. Sattelmeier V\, . * D. P. Glazier Industrial Hygienist Data Sheet Trenton Chemical ASBESTOS June 1977 - Location OSHA PERMISSIBLE EXPOSURE LIMIT 1) * Personal air sample, 41 Bipel operator. Time-weighted average concentration Concentration (fibers, greater tMan five microns in length, per cubic centimeter of air) 2.0 1.7 2) Personal air sample, 42 Bipel operator 1.2 3) * Personal air sample, 43 Bipel operator, Time-weighted average concentration 1.1 4) Personal air sample, 44 Bipel operator 0.5 5) Personal air sample, 45 Bipel operator 0.3 6) * Personal air sample, 46 Bipel operator. Time-weighted average concentration 1.5 7) Personal air sample, 47 Bipel and 425 Hot press operator 1.3 8) Personal air sample, 48 Bipel and 427, 428 Hot press operator 1.8 9) General air sample. Bay F-6, directly adjacent to the 425 Hot press 0.3 10) General air sample. Bay F-4, directly adjacent to the 415 Hot press 0.7 11) Personal air sample, 41]. and 412 Hot press operator 1.6 12) Personal air, sample, 4-pack line. disc brake shoe inspection and packing 0.3 -2- Data Sheet Trenton Chemical ASBESTOS June 1977 Location OSHA PERMISSIBLE EXPOSURE LIMIT 13) General air sample. Bay D-5, directly adjacent to the welding exhaust fan in the maintenance crib Concentratlor fibers, greater tiian five microns m lenqth, per cubic centimeter of air) 2.0 0.2 14) General air sample Bay 4-9, directly underneath the screw conveyor 0.1 15) * Personal air sample, Barker Permafuse operator 0.6 16) Personal air sample, 41 proof test operator 0.3 17) Personal air sample, #2 proof test operator 0.3 18) Personal air sample, 43 proof test operator 0.6 19) Personal air sample, 41 proof test and flat finish inspector 0.5 20) Personal air sample, 43 proof test and flat finish inspector 0.7 21) Personal air sample, OEM grinder operator 0.2 22) * Personal air sample, inspection and packing on the OEM line. Time-weighted average concentration 0.3 23) General air sample, Hay A-7, approximately 12 feet west of the OEM grinder 1.0 24)* Personal air sample. Myr oven aluminum gasket inspection and packing. Time-weightod average concentration 1.9 -3- Data Sheet Trenton Chemical ASBESTOS June 1977 Location OSHA PERMISSIBLE EXPOSURE LIMIT 25)* Personal air sample, load and unload at #3 and #4 saw lines. Time-weighted average concentration Concentration (fibers, greater than five microns in length, per cubic centinw-tei of air) 2.0 0.3 26)* Personal air sample, load and unload at #3 and #4 saw lines. Time-weighted average concentration 0.5 27)* Personal air sample, aluminum gasket application at the K101 spray hood. Time-weighted average concentration 0.2 28) * Personal air sample, Myr oven aluminum gasket inspection and packing (see air sample 24) Time-weighted average concentration 0.9 29) Personal air sample, pad only inspection. Time-weighted average concentration - wearing 3M 8710 respirator 2.1 30) Personal air sample, pad only inspection. Time-weighted average concentration 0.9 CHEMICAL BUILDING 31) Personal air sample, loading 28 bags of Calidria resin grade Asbestos into the Day Blender 0.1 All determinations of airborne asbestos fiber concentrations were made by the Industrial Hygiene Laboratory using the membrane filter method at a magnification ^f 4 30X with phase contrast illumination.