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LJ <br />STEEPEN ROBERTSON AND KiRS7EN <br /> <br /> M1tE~~tORANDUM <br />I, <br /> TO: Rob Dorey <br /> FROM: Kent Peter <br /> DATE: October 26, 1992 <br />' <br /> RE: Report of Test Results for San Luis Tailings Densities <br />' (SRK Project No. 14715) <br />This report summarizes test results for surficial beach density values obtained during the period <br />of October l through October Z, 1992. <br />' Mr. Glenn Guyer's field and laboratory test procedure report is attached. In general, l3 density <br />tests were performed in the upper impoundment, and 4 density tests were obtained in the lower <br />impoundment. Due to the very soft conditions of the lower impoundment, we were not able to <br />obtain the number of tests as originally planned. <br />The approximate test locations are presented on Figure 1. In six locations, mode than one test <br />' was performed, such as location No. 3, where tests were taken at Q to 5 inches, 4 to 8 inches, <br />and 8 to 12 inches. The types of density tests performed aze shown in the righthand column of <br />Table 1, testing summary. <br />Of the l3 tests performed within the upper impoundment, an average dry density of 85.4 pcf <br />was calculated. The range of density values to obtain the average were from 79.7 pcf to 93.5 <br />pct. The average moisture content was 20.7 percent. As shown on Table 1, density values in <br />general increased with depth, <br />' Within the lower impoundment, the average calculated dry density was 85.5 pcf with a range <br />of 81.4 pcf to 90.6 pcf. The average moisture content of these tests was 22.1 percent. <br />IJ <br />1 <br /> <br />' HKP/bl <br /> <br /> <br />