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<br />' sandstone, siltstone, shale and coal. The bedrock associated with <br />this particular project consists of the interbedded sandstones, <br />' siltstones, shales and coals of the Mesa Verde group. Colluvial and <br />residual soil cover in the vicinity of the site is naturally rela- <br />' tively thin, but in this particular case, much of this soil cover <br />has, in any event, been stripped away as the result of previous exca- <br />vations. <br />1 <br />FIELD INVESTIGATION: <br />The field investigation for this project consisted of an on- <br /> site visual inspection and reconnaissance of the refuse disposal area <br /> and the drilling of two test borings located as shown on the Test <br />' Boring Location Diagram. Test borings were advanced using a power- <br /> driven, continuous flight auger driven by a CME Series 55 drill ric. <br /> S <br />l i <br />ll <br />i <br />d <br />i h <br />il <br />i <br /> amp <br />es ca <br />typ <br />y were obta <br />ne <br />at 5-foot <br />n tervals <br />e so <br />n t <br /> profile or staggered as deemed necessary by our field representative <br />during drilling. Samples were obtained using the Standard Penetration <br />t Test, ASTM D-1586, using a split-barrel sampler. Bulk sampling <br />methods were also utilized. Results of Standard Penetration Tests <br />1 are shown on the dr~.l_ logs to the right of the sampling points. <br /> For example, a value of 15 blows/foot indicates that 15 hammer blows <br /> were required to achieve 12 inches penetration of the sampling spoon <br />' into the soil strata. In all cases, the Standard Penetration Test <br /> was performed using a hammer weighing 140 pounds which was dropped <br />t <br /> from a height of 30 inches for each blow. Field logs are available <br />' for inspection upon request to our office. <br />' 3 <br />~~ <br />