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I EXHIBIT DPP-249
E. I. du Pont de Nemours Company
Wilmington, Delaware 19328
CC: G.J. Stopps,M
J.L. Parsons, Eng J. P.. Allen, Engi
II 'La:.
ENGINEERING OERARTMENT
July 11, 1965
ADRIAN LINCH MEDICAL SECTION CHATTERS WORKS
DUST CONTROL PROGRAM
We are enclosing a copy of the results from the airborne dust sample
made at Construction Division site locations during the month of
June, 1965. Also included are the procedures used for the evaluation
of airborne dust samples performed by Mr. Felix Stein and Dr. Morton Corn
of the University of Pittsburgh, Graduate School of Public Health.
.
In evaluating the site locations whose quantitative analysis indicated
particle counts in excess of 1 MP/CF, v;e found the primary cause to be drafts produced from open doors and windows. The provided exhaust systems vrere not functioning in full potential due to the drafts
blowing the small particles away from pick-up point and making them
airborne. Other producers of airborne particles were in the handling of calcium silicate block material from shipping carton through fabrication process. In isolated instances, hand sa\*s contributed a percentage of the airborne particles.
The Old Hickory Construction Mono Spray sample dated 6/13/65 substantiates the need for improving spray applying equipment of asbestos fibrous
materials. The 6/14/65 sample was taken of the employee opening Mono insulation material bags and changing spray machine.
We anticipate this information will be of interest to you and if we can be of any further service, please contact the writer.
CONSTRUCTION DIVISION
15*.)
K. E. Keuper Division Safety Supt
KEX/dlm Enclosures
RECEIVED
JUL 15 1SS3
HASKELL LAE.
BETTER THINGS FOR BETTER LIVING . . . THROUGH CHEMISTRY
DUP 0901039
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