Document 7OB3RmEyadRk1gYeN06Jb2jgV
PLAINTIFF'S EXHIBIT
USX-237
D. . Willier
W. T. Donahue
N'cvoi.vner 11, 1973
N. W. Landry, 3W
/ A. R. MarkVuw*0/ *
P. L. Larle, R i D ^ File (2)
A19-9012
LU*j'l C0<RUm
* -'C^
YOUR LETTER, 11/5/73
An extensive survey has been conducted on small tools with regard to dust control ao used in tha fabrication of tha following Asbestos' containing productsi
TRANSITS Pipo Products FLLaBOARD Type Products mariwite Products
A3beatos Panels TRAHSITOP Type Aca Panels - Asbestos Cement Extrusions Dry Wall Joint Cements
Contacts wera made with tile following companies either through tha marketing manager or the salo3 tnanayor with regard to dust control on their small tools, and in all cases, except one, tha
only dust control equipment was on their small belt sanders \
Millers Falls Tools
Greenfield, Massachusetts Mr. Shaw, Tool Gen.-Mgr.
Rockwell Manufacturing Company Pittsburgh, Pennsylvania
Mr. II, Williams, Prod. Mqr, Mr. Callahan, Sales Managar
Milwaukee T00I3
Brookfield, Wisconsin Hr. Dick Randet, V. P.
for Marketing
ilr, Robert Youngquist Mr. James Baasenor
Robert Bosch Corporation Droadviaw, Illinois Mr. E. Cheshire, V. P.
Mr. Don Smith, Mat'l Gales Mgr.
Skil Corporation Cnicago, Illinois
Mr. william Foote, Markoting Mgr.
Black & Decker
Baltimore, Maryland Mr, Bennett, Sales Mr. Dick Campbell,
Marketing Hr. Don Ellison,
Engineering
Pilot Manufacturing Company Torrance, California Mr. J. Rawlins, President
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D. E. Uillier
- i-
Hovoirber 14, 1973
In addition to the above, the following companies in ex haust systems for valding and sand blasting vara contacted.
Theoo companies rr.aka suction systems but none ara'attached to toolsi
Pullman Ind. Vac. Cioar.ar -lobart Manufacturing Company
Malden, Maseach'-sects
Troy, Chio
Hr. ilouu
Hr. Jock Force
Empire Abrasive Equip. Corp. Philadelphia, Pennsylvania
I, also, have contacted Symons Corporation in Desplaines, Illinois, vho make a vacuum grindor for joints in concrete walls, and Kett Manufacturing Company of Cincinnati who have a fiber glass sheet saw with a dust collector but is only usable for matarial up to about cne-half inch thick. The Symons*, joint grinder uses a Carbide tool and mills the rough joints in concrete.
Dr. Paul Larle ha3 been working on this project for some tiro and has some imported equipment from England for dust control on a b ( O saw and for a portablo drill. In addition, he has put a vacuum pick-up on a large portablo "Skil" type saw for test purposes.
Based on his toata to date and the tests conducted by the Asbestos Research Council in England, we find the following:
CUTTING OPERATIONS
Without Exhaust
"'
uYiwT hand, portablo power and radial type saw3 without dust
extraction gives dust counts from 20 to 200 fibers per cc,
depending on equipment type used and product being cut.
_
With E?diauat"
Using hand, portable power and radial bench caws with efficient dust extraction gives dust contents as low a3 below S fibers
per cc, depending on equipment type used and product being cut. This requires a good high-vacuun typo exhausting equipment.
With Exhaust and Wet Cutting Using a good exnaust system and wet cutting, it appears less than 2 fibers per cc fiber count is obtainable. However, vet cutting is banned in California and has possible shock hazards.
o, e. uuaier
.04 24.1991
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DRILLING OPERATIONS
Without ZxhaujDrfiling operations cor.cr:*.': ru-h ieza dust without oxhausts and probably run mainly losa cian 5 cc for most operations.
Withhxhaust Drilling with efficient exhaust nysterns should readily meet tho less than 2 fiber per cc count under dry conditions without any water sprays.
SAliDINC, OPERATIONS Many portable power senders arc available with dust collectors, however, very little sanding is done in tho field.
The only operations requiring dry Handing in any voluite is in gypoun ur/ wall applications, mainly in .the Eastern U, S,, as in tho Western 0. S. a textured spray finish is popular which requires minimum sanding.
In sanding dry wall joints, tho usual sanding is manual, using sand paper and a block, however, tho now joint cements which are ready-mixed require much less sanding. In many cases, just a touching off of high spots is required. Thero is a great labor turnover in this industry so total exposure is probably minimized.
We are continuing to work on this problem and have additional equipment to investigate.
It is highly possible that we might have to recommend part3 from various manufacturers and then interest some manufacturer in assembling a complete unit to our specification.
Our survey work is almost complete and we are putting together soma of our recommendations on equipment to solve those dust problems generated by uso of small tools.
William T. Donahue