Document Z42OGZyDwnmdGZeL9djgz0a1J

1 what is called a crevice tool. Page 2112 2 All it is is sort of like your vacuum 3 cleaner. It has a little device that has a narrow end 4 to get down in real small places. 5 Q Is this what is known as a wet method? 6 A This is an alternative method that some 7 people use, and it is a wet method that you use either 8 a solvent or water with a surfactant in it, soap, to 9 try to wash it down. 10 This is not considered as a factor. First 11 of all, it is not as effective in sort of holding the 12 dust down as an enclosure, but when you use this wet 13 method, after the material dries, even when it may be 14 wet to start with, when it dries, it is still dust. 15 MR. IGNATOWSKI: Hold it there, Mr. 16 Shellenberger, please. 17 Q Dr. Dement, so far we have talked about and 18 you have shown us examples of wet methods. 19 Is that the very same type of procedure that 20 Merewether discussed back in 1930? 21 A Yes. It can reduce dust, but it is not as