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• Moisture content and density testing on drive samples and Shelby tube <br />samples from the exploratory borings. The Shelby tube samples were <br />combined to form a composite bulk sample. <br />Classification testing including Atterberg limits and gradation on several <br />samples of the refuse and the native soil and bedrock; <br />Moisture-density relationship (ASTM D 698) and three direct shear tests <br />were performed on the composite sample. Two direct shear tests were <br />performed on liner samples of the refuse. <br />The refuse contained significant percentages of gravel particles which cannot <br />be included in conventional test samples. Direct shear tests of the composte <br />sample were limited to particles smaller than 3/8 inches. To better simulate the full- <br />sized sample, the plus 3/8-inch materials were screened from the composite samples <br />to be tested and replaced with #4 sieve to -3/8-inch material. <br />A standard Proctor moisture-density test (ASTM D 698, AASHTO T 99) was <br />• performed on the composite sample with the + 3/4 inch particles excluded. The <br />results of specific gravRy testing from a previous investigation (Reference 5) were <br />used to mathematically correct for the larger sized pieces (ASTM D 4718) to estimate <br />the maximum dry density. <br />D(ISTING RDA CONDfIIONS <br />Project History <br />The general location of the revised Refuse Disposal Area is shown on Fig. 1. <br />The RDA is located wkhin anarrow-necked valley north of Highway 12. We <br />understand stripping and initial drain construction began in 1983, with initial refuse <br />placement in 1984. At the time of the current field investigation (November of 1994) <br />l J <br />.4" <br />