Document ZBorG9EE5yGDr9JgjQapVQm6L

FILE NAME: Union Carbide (UC) DATE: 1964 Oct 21 DOC#: UC106 DOCUMENT DESCRIPTION: Internal Report - Findings of Visit to King City Mine & Dust Evaluation INTERNAL. C O R R E S P O N D E N C E UNION CA RBID E CORPORATION 270 PARK AVENUE, TprftfORK l^ ^ O R K To (Ntn) Comp a n y location Copy to Mr. J. A. Kiddle Nuclear Division King City, California o. October 21, 1S64 Aftiwnnng Uflor d<xt* Toxicology Mr. K. W, Lentz Mr, C. E,. Brown Dr, C. U, Dernehl Dr. K. S. Lane Dear Mr. Riddle: Sub} cl The following is the report of the findings of my vlsio to King City, October 8-9, 1984. 'D ISTR IB U TIO N z r . i................ Wt A. Uddfe 81 -- . Ci Ci Uff"""'-- f) ", tia c o 0. 3 tris foreman t g j fto.OSK Mine The mine was visited and proposed pattern of operations discussed with Mr. Cohan. Air samples_were not collected because the only work in progress at the time was maintenance at the grizzly. The rather heavy layer of fine loose^material in the stockpile area was noted and it was felt thau this was a potential source of air-borne dust that should not be over looked. Mr. Cohan felt that the loose material could be _ removed and'that the travel area for loaders could be wet cown often enough to keep the dust concentrations ^low. bi> 2a S , , agreed that these procedures should be considered as socinoarcj for work at the.site. --Miil--l The procedures for dust evaluation were reviewed^ with Mr. Kamens, and particular attention was given to problems of microscooic examination of the very small dust particles involved. It was noted that the microscope eyepiece a^-i not allow for proper seating of the eyepiece micrometer, anil it was shown that with an adequate eyepiece dust counting would be much easier and much more reliable. It was recommended that another eyepiece be procured. Information on eyepieces will be forwarded later. Dust and other are given Location samples were parts of the below. collected in the mill at pellet_bagging cycle tha t were in operation, bindings Air-borne Dust Million of Partlcles/cubic foot Alongside operator at bagger. (Bagging pellets),Area being . d-o b*4 vacuum cleaned at the same time. UCC 004969 Mr. J. A. Riddle - 2- October 21, 19 6 4 Location fcont'd) Srea in general during vJS2ftl0n r mic.ropulveriser." bagging, and vacuum cleaning. At bag conveyor discharge during bagging. 6 Walkways,around Simplicity vibrating screen and bin discharge. Platform above mix tanks. Air-borne lust Millions of Particleg/quhin 17.3 2.3 2.4 2.3 2.2 2.2 3.5 the S ^ m o S ^ r S c i i a ^ r generally ithiA need for r^B r e c o m m e n d ^ h a t ^ h e ^ r a c t l e i l r t0 rJate ljl operation, I presence of even IrrSii 2f w arin6 respirators in the This is necessary because of vis;5'^ e dust be continued Tor a safe work envlronmenifa i i \ Very l0W concentrations allowed material in w h i c h t h l n a r t i ^ f We are dealinS with a y Particles are exceptional^ small aabestor;`01SoLStS ey 9Ne2w1 )V o L ar:a0Sde`i */ n r . TM . on ' ohose present were Academy of Sciences. /imon~ S ath ? U areat Brit a m 9 S t 1 SM<-SrA ' r t try/ r"" the lnlte in which asbestos is rodurort ??h yUrica and other countries of rep resen tativ es orP e T ; v,ere a nunber health departments. * ' Puolic health Service and state to a a S #lSSS S S S S | a S e s ? o s " U0? ^ BXperi" " obtained concern for hazard! of h ^ f i n A h i ? S ? f f S?d the S o w i n g so by the increasing c o n ~ i r f i ^ m m ^eria1' but even more small particles (less In view .ofthe tone ^ sfven t0 the role T very I micron m length and diamete-) that we are exercising i S ^ dSCUSBlonB' 1 belleve the cale ` exercising in our operations is definitely S t i f l e d . PV/M/en Yours very truly, t e c c: Paul W. McDaniel Industrial Hygiene Engineer UCC 004970