Document 9aObMZO8wE4nXygggyrEBY36

PLAINTIFF'S EXHIBIT Rick Magargal n Chem. Lab Blue Bell 2126 Will II CertainTeed Corporation Pipe and Plastics Group oiaemrrioN: CAL CHANGE ORDER APPLICABLE TOf A/C Standard Purchasing Specification Spec. 501 bAti or issue: t.c.o. no.i PAOE NO.: January 19, 1984 8 1 Pulverized Silica Purpose: To bring the surface area of silica requirement more In line with our current cement surface area. A comparable surface area Is desirable since the reaction rate between cement and silica and the product quality produced therefrom are Influenced more by surface area than by purity. Effective Oate: Date of Issue. Disposition of Superseded Pages: Dispose of page 3 of April 25, 1973 Issue and replace with new Issue. PREPAREDLY: 02- APPROVED.BY: MFO. . 7" * J mj a ALU I.E. .jf: .1' CTD012393 OTHERS