Document GmQJV7o4mYGmw5k72dZa0R9bv

w T- Research and Bepteabcr 17, 1966 Osntsr File: F. L. Fundsaek Fiber Analysis Prograa - 8tatus Report JM RESEARCH RCCCJVEO PINDSVCr. SEP |?1968 Asbestos Fiber la Dwr Sararad breads of baar ara being examined for tbalr asbestos flbar eoetaat. Tbs eaeples vara all purchased oa the open Market and rapraaant a croaa section of the various filtration techniques currently need by tba braving industry. The techniques can be awarlzed aa follows: A. Diatoalta precoat and diatoaiita body feed. B. Fibrous* precoat and dlatonlte body feed. C. Fibrous pulp** filters. D. MiUlpore neabrene filters. Vihreva"precoats can be either dlatoolte-ashestoe, a.g. J-M FZBSB-IXO or asbestos-cellulose. Fibrous pulp filters are pads of cellulose and asbestos usually prepared at tba brewery. They are used without body feed. At various stages la the brewing process, different filtration techniques are used. The brands of beer which are being analysed along with the filtration techniques used (letters refer to list Above). Brand Filtration techniques Budwalaer Scheldt's Bsingold Bxtra Dry Barragansett Bchlitx (regular) Bchlits Draft Balers Old Bobeelan Flels Larger Fiela Draft C only AB AB A B AB A B D A only A only T tD '* 3 All of these samples have been filtered, ashed, rubbed out, and under the al.c>.rwn aicroecope. The qjtntl >*> wi /a counting of tbs aaepics is underway and should be collated in the next few weeks. Visual exaalaatlca of the electron nlcroscope plates shows tb fibers in egg seeplea. Those aaaplaa whlgfl fVS been filtered tteegl asbestos contain fiber In relatively high quantities, probably greater than the highest of the nunlelpal water aaeples studied. Behlll PLAINTIFF'S EXHIBIT JM-1991 F. L. Pundsack 2 ptlkbM 17, 1968 uler, la particular, irnii to contain lerma amount of flbor. 9m amount aad ilu of tbo flbor, la such that It can bo observed by optical micro* copy. von tbooo braada vbleb bavo boon flltorod through Mllllporo filter abov tbo presence of seme flbor. Our analysis toebalboa uaoa a 0.8 mlarom Mllllporo, whereas, a 1.2 aleroa filter la cosmonly used to filter tbo bottled "draft" beera. This confine oor laboratory reeulta whieh showed that a 0.8 wicrrn the largest pore also which will effsetlvely remove all of the fiber. the Budwolaar sample was analyaod prior to tbla more complete atody. Zt a* found to contain 2.5 mlcrogrems of flbor per gallon. Thla figure la about 1000 times greater than the amount reported by tbo Brltlab, In tbo atudy pub11abed In lature Magazine. Fiber In Water 8yatena All of tbo data concerning the fiber content of municipal water ayatema baa' been reported previously. In addition, a report baa been laaued covering the details of the fiber analysis method. Aa an adjust to tbo municipal wter system study, a program la now underway to determine both the procieion and accuracy of the method used for quantitative fiber estimation. This study will Include the effects of sample preparation and operator Judgement. The TBAKSITB Pipe test loop le now operating satisfactorily. Three sms* eesslve rune have been aada using water with a pH of 5*7 and aero hardness. After about b00,000 gallons of water passed through the test pipe, It wes necessary to terminate the runs because the sample filter was completely loaded with "debris" from the pipe. All the water entering the pipe le filtered through a 0.8 micron Milllpore filter. Microscopic analysis of the material collected on the sample filter re vealed primarily asbestos fiber and silica. There was no evidence of cement gel. A more detailed quantitative analysis of tbass runs is now underway. cc: 8. Spell I. M. Fenner