Document wD1EBjGEJv6Rdaz1Mk9922Xwo

ICK3UKE&! FDR KSCORD Sit lee B. Grant, >l.D. *A5X: November 5> i?65 SUBJECT: Medical Staff Visit t& Fort Allegany, ^November 2-3, 156^ 1, This plant was the first Pittsburgh Coming plant to be estab lished, and it was built in 253? to produce glass block, The present plant manager's father was one of the founders of the eorpany and eventually rose to he a vise president. An expansion of the plant was made in 1542 at vbieh time the foam glass operation was added* In 1555, fabricating of the fear, glass was added; in 1561, the polyurethane line was added. The last to he added was unihestos Just a year ago. in 1564. Nhtnthe glass block line is running, it runs on a 2b hour, seven day a week basis; hwtever, the derrArt for glass block has been such that it shuts down four to six months every year. This time it has been down since March of this year. Foam glass is a 24 hour, seven day a week operation. Fabricating and pclyurethane is a one shift, five day operation and unibestoa is a two shift, five day operation. During the off season for glass block, they hare a glass decorating activity that provides the only work in that area. This operation taxes two men and is a 24 hour, seven day a week operation. 2. iti the polyurethane operation, a prepolyw containing about 20$ pclyall resin and 60$ TDI which is made up by the Chase Chemical Canary, is placed in the foam machine storage tank. The other foam machine storage tank is filled with a previx which is a pclyall resin and silicones, a catalyst and a Freon type material which provides the levan and the bread. The prepolyrvr comes in 55 gallon drums and is pumped via an enclosed system into the storage tank and the polyall resin of the pretdx is brought in on tank car loads end is run from a large storage tank to the foam machine storage tank where about a five gallon can of all other Ingredients are mixed in. The * prjsux and six are brought together on an incline and in about a minute and a half they expand to their full thictacss loag which is about ^ to 3 feet high and about five feet wide. This is an enclosed operation which appears to be well ventilated. At the bottom of the incline, the loaf is cut into desired lengths and allowed to stand in storage for a few days until It is complete2y cured following at which time it is cut by the hot wire method into appropriate thicknesses and shapes. This was started as a pilot plant operation about four years ago and was really because of lack of demand for the product did not proceed beyond a pilot plant operation. Fred DeVries was hired from Simonis where he had been their plant manager at Benton Harbor, Michigan, about a year ago with the promise that he would be the plant manager of a new poly urethane foam plant, but it appears ns** with the on site nix capability feting developed by F?0 and others that this pre-forned foam has little future promise. An industrial hyciene survey by the Industrial Hygiene Foundation in 1561 of this operation shoved no significant TDI exposure. WV-11061 Port Allegany nodical stair nit glass tube iff forwed which iff broken vp end tfcea carbon added and the carbon and the glass iff milled to a tery fin* powdery fern, This powder batch toatarial is placed is a stainless steel enclosed can which is sent through* cellul&tlsg furnaces and then the raised foaa glass brick is nunoeed /Torn the can* the stripping operation, placed in a cooling lehr from which it foes through a finishing operation and is either packed -for shipment or placed on a pallet and sect over to the foam glass roof manufacturer where a number of these blocks are placed tofather and asbestos paper is adhered to then end this material is used easily for flat root coverings* 6. The fabricating department iff another department that uses the *kUfinished product of foaa glass* It shapes this foam glass into various types of coverings for pipes, large chemical retorch, etc. There is also a 0.0. Acoustic manufacturing operation using again the saus foam glass* kere, tbe foam glass is first put in a high compression pressure vessel, the pressure raised very rspidly which causes a rupture of all the shells within the foaa glass and the foam glass Is shaped to the proper site for its future use and pressed between nailboards which puncture hundreds and hundreds of holes through each side about an Inch deep* This material is then painted at a spray painting operation. This paint is baked on the material that is ready for installation as a sound retardant. ?, Although tarry Griffith, the plant manager, was bom and raised {no mere tape) t i% SJ 00003  V h I# t *, * * > eeftfMMWlAl?* 9 KNtrfTLVANI* fMViHWMMewfAJ. M*P*C*I eccu**rtw*b *iAk* *Alf *IC **#*** v*t . ** Q> n**0HAi auwmatoa* mencnv* tawinurwr t> f*IAf A yrtKTjgj 4i g mhb7 4"(***! NHptury |KMnUn e^wipnrat. si-WMl jwit UTl ft* MUJWtt F<**ATJON> U*rr aampMbMMn peUttulMM *v mfiifck <m iSm u^rrt /r*fiMtr *** ittifet a^HpauM. 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Ih *VpU h. tMWaiard aub a tr o ynmaf *ay arttiM* M Jrj**nri 4tfl, p larfVd* d * htM W' pirl-kt4, M hall W p iV*p-4 %*.M M<a. a aha h--a a Rlaa R^raaoar) v, fth*4* Mtlw* td Mtiv] vp ap C-MbK 4rl rapraM<^ < a yp tv thr V_v ^ , fa WU L, *n>ln4 n |iM nJ*a^ **V^p ii*4 t Ihr 4M> a*a<P*fV * 4. .| 4v4xm WiKf-at a< tV Jn brU ft tW Ufct wapfbw ahnU Vn-4r hi M<IW U rttv pnVf m rp|Hf rW> -ntthft# . m` r* t ARTKNT or ZM'BlCi#2ZtXL RESOURCES Occupational Health *96 South Hain Street Haedrille, Pennsylvania 1633' June 17, 1971 Pittsburgh Coming Corporation Port AHaganyy Pennsylvania 16731 Attentions J, Richard Hurray Manager, Personnel Service* Oantlenent s &i Hay 20, 1971* Hr. J. L. Voodrine, Industrial hygienist, discussed with you dust and toluene dl-isocyanate (TUI) levels detaminea fro* air samples collected previously and reinspected areas where asbestos materials are handled, Aa reported, no TDX vapor was detected In the air in Building he. 6* The dust levels determined in Building Ho, 6 are listed in the attached Table. The threehold licit value for duet containing asbeetos is 5 edllion particles per cubic loot of air, based on exposure for an 6-hour working day. This is cur rently a provision of Article 112, "Regulations Establishing Threshold Units in Places of Ewpioyaent"* however, a reduction of this value hes been proposed and la expected to be adopted. In view of the above and infcreistion indicating no significant change in operations since our latest sample* were collected in Sapta&ber of 1970, the following recoaneadetioas are nsdet 1, Continue the periodic mdleal chest x-rey exssdnstion prograa for employees exposed to dust, Exaoination* of workers ex posed to asbestos dust should be aade once every two years, If you utilise a 11 x 17 Inch chest x-ray end annually if you utilise a 70 bo chest x-ray, i Report the nsae and eddress of the physician in charge of tie K *-r*y prograa axad the results of eheat x-ray exatBinstiona to * N this office. 2, Reduce workers1 asbestos dust exposure* to safe levels. Ms nay be effected byi SJ 00106 - r*' I Pittsburgh Coming cerporgiico Port Allegany, PonnayXvanjU l?34 -2- jyj* 17f 3.97X A* Instituting and maintaining a good housekeeping progm, oapeelall/ t the feeding end fluffing machine# in the forsdng Department. B. Maintaining the exhaust ventilation duets and duet cel* lector* in good repair end operating tradition* Providing air-Ught seal* in the duets in the pressurised part oi the ventilation syste* in the feraing Department. Improving the ventilation control provided at the awing operation in the finishing Department through nore effec tive enclosure and Incresaed ventilating capacity* Z* Precltaning cut piee* befer* peekaging or provlds exhaust ventilation control* during packaging is the finishing Department* $ /fenforc* the use of reapiretora approved by the u. B. Bureau of / Hines for protection against toxic dusts until other affective xj controls are provided* Respirators should be maintained in 1 1 sccordanee with the provisions of Section 1, paragraph C of V Article 412. Pleas* not4 *7 this office vitsin 60 days of the steps taken to eosply vitfa t above recoeoendstiens. nelo**f for your information are copies of cur Hygienic Information Ouldes entitled *Asfc,.etoe"# "Personal Respiratory Protective bqulpeent" and "Toluene 2,4 Dii*ocyasiete"> and a copy of Article 02, as amended. \>i 1 J. H. V* Sureties &*f,tot\al Industrial hygienist HJSiJDBcUp enclosures SJ 00107 CCl*CXftfeAL7K OV PSWCTS-VWJ1A CEPAKTKE.T tf UMJlOiX&fTlL. KfiSCUHOsS OCCUPATIONAL HEALTH Stast Concentrations Pitieburgh Coming Corporation Pert Allegany* Penney5van!e location forming Depenoent Between feeder No. 2 Building Kashina No. 1 Building fca chine Concentrations* {oiliienz of particles per cubic foot of air) 1.? 2.2 hi 2.6 1.2 1.2 0.? o.a 0.5 ftemtrk* Worker's breathing zone, loading feeding machines, rezwiratnr worn Sem es above, clean out door on conveyor accidentally left Often General air Worker** breath!ng zone General air finishing &epertet By scrap grinder 2*8 2.9 6.0 4.1 4.6 1.4 5.2 ;*.3 6*4 2.9 `/v :i*3 :*.v 20 Worker's breathing zone, feed* ing material to intermediate t. Worker's breathing zone, renov ing end packing eateriai froa intermediate saw Worker's breathing zone, feed!; material to email saw Worker*a breathing zone, remov* iry tixA $i*eUtt material froa S*m1I r*w Worker' n **T**ure feeding and tr*iinferring. materiel cn large tew Wiper's ir**Uing zone, tranaferring and, packaging material rr< lar.e caw i*M?ral uivx only interne Ute iw in rt*er*ti tm Ctfiog l*c*tica' Shipping Eeps/taent Concentrations" {millions of panicles per cubic foot of *irj 1.3 3-7 it*m*rk9 Worker* brtsthing tom, oifhlne onO toiling boxa# - ii.tshold liait vsluC (717), $ aillion psrticle* per cubit foot of *ir, fcestfi on exposure for on Muwr wording city Survey fey* John Piorro V C. Goiter. Irtfustrill Hygienists w st.' </l tt> S3 00109 r * CD*o*<n*o.tv Of MKinvu Klii.rx pmVON l* KSI^ATIdKU. HEALTH ETCtlKC MF0MUTS* Ctrt&c *0. K tou**t u snrnun i>*cmnf: TtoM i,* MA***i?*Mt, * UH u I. * mp4 TOJ. K< lb* {HtOS*. ha ma>*' i I* *h p/. (!< *1 /o*m Ui*iU* AM rij'^1 rMlf'li (tiuu, TOi it a Ull vttk A fM'4mtUli( ' lb** U4U'UU| (. M'Paiitto 6.4 p*n per mllllto ft*'** * *x, I' it paJtiftla M tAlaaM, ufM to*fAtbifl*A, iratMi, Uirttanm, lk*aAM iM rtftfl tui. ha M'Uu ff**a? la 1.21 --* to* to;Ur* MW A# 4U*f t T6 mm. EHOItT.fT** UMJTt fwsiM>n #**** .<2 M* pat aadUJaM fA" HratMU.) rMim^tus i*r a ft>*U*u <TWU U towtft W m utn&AJ. MVtsatj timrW to TK J MMUtM. It ! la * irntoAl to tka f* AAA |U* 4*2/ II laf!*, t CAWP* IfftlARM U* fAttPa- MiaatiAAl trad. totolaH-- * TOi ta <*< M tto aWM-tafm limit m* UMtt IrrtUtlai ta iht *>, tai tiA ivaga m4 MtWiAU* kre%(UVt 2l b'AAffciM 9*4 ihfUmmtiim* ml >M to*pito}> W(*4wit may tor*m* **Mmato H TfilAto 1m**! ttpmttttt mi/ * tha tA*toi> ata.tto*. rcvt>mKt A. KtoAlAttmgf C^mplaM |*rate! *m***tA*UA*, MiN>*U rllk ftt--te aatf'ar siiMftf rttpirtttry rmtutmt ><M to (ran ufMin* It. PartMlt goapnwlam: J*flawlff a *<?4i*tto W m*P4apT ua aki<ttfitf, tap ifvin m f m*ii to a *** t**>l**tor? avAtitoB. . TirtlAi*- >*** allmr**4 ptrtm* Irmm ** ap*a, waft Ali rtotAit p*at {*iita aM aa*J * *au. *** Hi ftf>ptoA. nrwvftu cunram* MS*4*i* Atmaa^malt tmPMUrattAAa toto* (ka *A*rf*to*m UtoVt Wf M*Mr * 9* >(* A*4 vMtUAlaM A, t*AA f*t Ca>H| > f*>x lava* All mpt **Mm* A> mmr% A a pMm M aVfi* I*^aI paAaai p(UU4a C **!(VtnM lAM'Vtk to yamaap.TtH *ptt a M > |ma*aiM. fc. M^toAl 1 *."*** tiA>! *ft> ** Aftatpaa*A AMtlMAP (A* a HU Al W MafM)|Jit'lai arf AttaiwA, p*i hm\ a. ^tPAto* f W aa.A. Tbt PAapiaft-wl4 ft* **#* Kf to* U H .'* W Mia** Mt pat*. ti^ AfAtoAt (< * V* > ft* to ftftto*! Afttoatoa Mto f~*a.Ua fti|A Aapar a.aiaim. . U*t. UK > it imp am. im 'Z-5,7 SJ 00110 Hr, K* J Sttmiet 2 20 August 1971 the objective of the Corporatloa it to develop a suitable aubstltute for asbestos fibers w aoea aa po**lble#tnd every aflore Is being node to aocowpllsh this goal. Very truly youra. PITTSBURGH CGRKXHC CORBOSUXICN jna/w 0 sj oom Port Allegany Medical Staff Visit 2 3. Vnlbestos ia a trade name for an asbestos pipe materiel. That iteration consists of the following? scrap, asbestos which conns from the cutting operation where pipe lengths are cut, *BX and CX-11 which are asbestos of dtfferect fiber lengths, along with a diatoreaceous earth. All are Rilled together, mixed end laid down on a conveyer where they are`sprayed v&th sodium silicate which Is about t0% water and 20f silicate which acts as a binder for the asbestos fibers. Then, the asbestos is rolled to the desired site and a sizing operation which smooths the asbestos piping out is accomplished and then the asbestos pipe is dipped in a watery clay nix which provides a protective film for the pipe giving it a ssooth finish. These pipes are then placed in a drying furnace which is in three sections, the first of which is 250 degrees, the next 350 degrees ana the last is 150 degrees. It takes several hours for the pipe to go through this drying pro cedure* Following this, it is taken to the saw and out into various lengths and split down the middle. It may then either be packed into the boxes for shipment or it can be sent over to here a fiber glass yam or a roofing felt covering applied. 1. The batch department makes batch for both No. 1 tank which is the glass department and the No. 2 which is the foam glass department/ the basic ingredients of both glass arc similar. (Mapleton ? } sand is used, Bacberton soda ash e:d a low-grade borax material called rascrite and one available cullst or scrap as it is called when Its foaa glass, reethylene cyanide which is an alkalizing agent end limestone ere thertngredieats. The batch house is a three shift operation sithough the No. 2 tank has a lb-hour storage facility, the No. 1 tank has only a very limited one to three hours' storage facility. The lev&ning agent is added to the foaa glass and this consists of sodium nitrate, sodium s&lfateand floorospar with a total amount of about a five gallon can of the material. The glass brick line is very such like the optical glass line only on a much larger scale in that the glass coses out of a floorbeartb end runs down into a bowl where it is pressed into the desired shape. Then, the edges of two of the glasses are heated to Belting temperature and joined together to forre the glass brick which is then put into an annealing lehr, Jrpm the annealing lehr, it can either be sent directly through a prime coat and then a vinyl coat spray painting operation which forms the bond coat or the expansion coat between the ceramic brick, etc., and the glass. The prime coat is a hydrolyzed ethyl silicate with a snail amount of hydrochloric acid, end the vinyl scat is vinyl resin and an alcohol base. If the glass block is to go to the decorating department, it isn't given the paint eoat but is sent back to there end painted with the appropriate bright colored paint which is a high lead pigment paint which runs between 12 and 56% lead oxide. This is done in a spray paint booth which is adequately ventilated. The painted blocks are then air dried and this paint tends to flake off until it is run through a high temperature firing which uses the paint material into the glass and it is cooled in a lehr* 5. The foam glass Is then Bade in a tank with a capacity of about 63 tons per day; it has been producing 60 tons per day for some period of time. This glass production is very much like in the SedaiU operation. The SJ 00002