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RTT'~+natir ~o <br />COMMERCIAL TESTING LABORATORIES <br />`l <br />i ~•, A OIVISIC]N pF CTL!THOMPSON, ING• " <br />June 7, 1994 <br />Golder Associates, inc. <br />200 Union Boulevard, Suite 500 <br />Lakewood, Colorado 80228 <br />Attention <br />Subject: <br />Dear Mr. Kidd: <br />Mr. David Kidd <br />Granite No. 2 <br />Physical Properies <br />CTL Job No. 9157 <br />This report presents results of abrasion and slake durability tests performed on a sample <br />of material labeled "Granite No. 2". The sample was delivered to our laboratory on May 26, 1994. <br />Tests were perionned in general conformance with applicable ASTM test methods. Results <br />are as follows: <br />Sample I.D. Grading Weioht Before, g Weight After, g % Loss <br />Granite No. 2 2 10,003 5,236 47.7 <br />ASTM D 4644. Slake Durability Index of Shates and Similar Weak Rocks <br />Samole LD. Durability Index Tvoe of Failure <br />Granite No. 2 97.6 Retained pieces remained <br />virtually unchanged <br />If you have any questions regarding this report, please feel free to call. <br />Very truly yours, <br />COMMERCIAL TESTING LABORATORIES <br />~~r~~ ~. <br />e rey L. Groom, P.E. <br />Associate Engineer <br />JLG:jIg <br />22 LIPAN 5Tr'7-EET pErJVER, COLORA~7^ 80223 303 / ©25-3207 <br />