Document EdVRQv8bo7kek576b1G9qJpGn

Page 2 Inorganic Ingredients The only noticable difference of the inorganic ingredients is the wet volume of the asbestos fiber. While all data is well within the specified limits of 140-260 cc, 1978/1979 fiber displays a wet volume 10 to 20 cc lower than the 1976 fiber. 2. Physical Properties Gogan Hardness & Specific Gravity Data for the 1976 thru 1979 period does not indicate any significant trend. The only detectable trend Is an approximate 3 gogan point increase over the three year period. With an allowable hardness range of 15-41 gogan. Acetone Extract The average 1978 extract is .76 percentage points higher than the 1976 material. The average 1979 extract is .06 percentage points higher than 1976. The specification for acetone extraction is 4.0% Max. The acetone extract of the 1976 vintage being reported as 1.94% is rather on the low side as compared to a recent study of acetone extraction for this material. The results of this study indicate the material having a typical value of 2.64% with a 3 sigma limit showing a low of 1.50% and a high reading of 3.78%. 3. Processing A review of our Procedure Change System (PCN) reveals that no changes have been made nor requested throughout the period in question. SCI 02477