Document dYLMNDEeNBVwaJDrYo1473EZ0

FILE NAME Kent KNT DATE 1952 Oct 29 DOC KNT007 DOCUMENT DESCRIPTION Memo RE H. & V. Specialties Company West Groton Mass Catober 29 1952 Pai From Sabject Sabject Persons Interviewed Date of visit Dr. Elkins Kr Barley and Mr. Comproni and Y Specialties Company Yest Groton Xass Kr 7. C. armon Employment Manager Mr. A. 0'Yalley Form October 27 1952 Accompanied by Inspector Edward J. Mechan of the Division of industrial Safety a visit was made to this plant to evaluate the dust hazard developed during the picking and carding of a cotton and asbestos , mixture The This end product is operation has to be used in been at this plant the facture of since June 1952 cigarette filters oo, Cotton in Lapped form is ressived in 36 pound rolls and are placed near the apron of the blanding shine 20 pound bag of processed asbestos is placed on the cover of the apron Tas ' bag is slit and the asbestos is fed by hand on to the cotton Imp being fed into the blender The xixture consists of 30 asbestos and 70 cotton After passing through the blender the discharge is inte a box truck The same material is fed through the machine again but is allowed to discharge directly into a storage bin or in some box truck as needed onto the floor This material is cases some of the material is fed rept into a and fed The blended Exterial is taken by hoist to the second through a cotton sarding chine At the take end the foar carded : sees: onto th Drorr css roa sha at whe Sli: . sot RS + - . Hee . ee we ST a P soe P bay . tebe . . sae yp fee The dustiest operation involves the feeding and dischar~ of the blanding machine One man usually operates this machine but is occasionally helped by one other employee There are a total of 9 man during three shifts for the complete operation The exployee at provided with the feed and at the discharge and of the blender are and were wearing unapproved Martindale type grase masks The blender is located within a physically _ *. separated room which is 35 ft long 12 ft wide and & ft 3 in high 1s,ere of There are two 6 ft by 7 ft entrances which are not provided with doars g is one window 5 ft by 2 ft 1 in The cylinder the blender le haat rentilated The bag collecters are located within the room and + ee 7 oe1. of re oe are enclosed The air is recirculated The speration the pinker- Lender os generate's considerable dust in the working atmosphere of this large fibers Liis- a room Leverer the majority of the particles are ro ee Py i att and are 101 ' . . oa - . b . . -e ry -2 believed to be pathologically significant If the respiratory protection is not worn the dust as irritation of the nose and threat There are 2 carding machines located on the second floor only one of which is being used for the asbestos cotton aixture The 5570 various vorker rolls etc. are covered Exhaust ventilated slot hoods are located at those points where the greatest amount of dus sz generated within the The room collector for this system consists area The sted six from thts of 2 cotton baga operation te Recirculated in evaluation was made of the dust concentration in the working atmosphere at the blending and carding machines The MSA Midget Lapinger Flasks were used and results are tabulated below Sample Za, 1 2 3 4 5 8 . Air Analysis Table Mina 10 zin 52 sec Location Operator's expose Results JEST ASBESTOS &COTIC Ullions Ullions of nexgiales rubla a 7en-oe feeding blender second run 10 min 30 200 material Operator's exposure discharge and of machine second run 8.5 10 min 50 sec. 10 min 37 sec 10 min 49 sec. 18 min 30 sec material Operator's exposure feeding _ blander first run material Operator's exposure discharge and of machine first run material General air side and front of Breaker card to General air take and and side of Finisher card 1 Maximum Allowable Camoentration 8.3 9.3 11.0 6.3 6146.9 3.3 66146.9 161446.96.9 8 15 dast in air is given as since there is only 30 we do in the evaluation 5 million particles per cubic foot asbestos in the xixture using the of air However same reasoning as of the maximum allowable concentration for the silica we arrive at 15 Therefore the the concentration of a figure of 15 million particles per cubic foot of above results indicate that if our assumption is valid the dust is not excessive As indicated above the anjority of the suspended dust is made wo of large fiber partiales and sould not be picked up by the Midget Lapinger Flasks The method of discharge of the materials from the pioka- _, blender and the rehandling of the blended material is not entirely ; a satisfactory and results in considerable dispersion of the dust In view b b above aonmitibus , following and and tima are being submitted . gd ' < ation of th machine should be provided with and required to wear approved Type & raspizntzs / " 2 o dust collectors should be enclosed and the air shoald be to the ontalde of the nlant, 3. Consideration should be given to a change in involving the pneumatically conveying of the material from the blanding operation to second floor storage bins operation picking make-cpair 4 Provision should de ande to permit the entrance of inte the Sarding Hoos, . ~~ 5 A Yun cpab f ' " fan prating at 17O rm 4 4 " Boom. suitable collector should be provided ' </^ 8nA . ' <" ' " for this unit prope " " tbtt 6. An industrial veoma aleaner should be used to reHOT " < h " oc ' rorhad '. ' " Thereshould be a regular elean-cp at frequent intervals. 7 ontrol rvgr ahould . Zach employee in this operation should be given a physical examination indinding indinding - ray of the chest The examination and ray should be repeated at , least anmally when when the It is requested that Inspector Keehan above recommendations have been completed notify this office oy id