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f <br />2 August 11, 1986 <br />Dust Analysis <br />Figure 1 shows the uncoated mineral wool. Figure 2 shows that the mineral wool <br />is encapsulated with the removal encauiant. The analysis of the microphoto- <br />graphs shows that -the removal encapsulant effectively coats the fiber. Although <br />no measurements were taken, it is highly likely because of the amount of coating <br />on the fiber, that the coated fiber would lose its aerodynamic properties. <br />Asbestos Wetting <br />The photomicrographs in Figures 3 and 4 show that the BWE 5000 removal encap- <br />sulant wets both types of asbestos fibers. When both types of asbestos fibers <br />were placed in contact with the removal encapsulant,'the wetting occurred almost <br />instantaneously. <br />The results of the evaluation of BWE 5 show it'to be an outstanding material <br />for wetting and encapsulation of asbestos fibers. <br />It has been a pleasure working with you on this phase of the program. When you <br />are aready to do the additional work we have discussed, please contact me. <br />Very truly yours, <br />William Mirick <br />Polymer Science and <br />Technology Section <br />W14 : me <br />Enclosure <br />