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-14- <br />APPENDIX <br />FIELD INVESTIGATION AND <br />LABORATORY TESTING <br />FIELD INVESTIGATION <br />Subsurface conditions below and immediately adjacent to the initial waste <br />rock pi]e were investigated by drilling, sampling, and logging three geotechni- <br />cal borings which extended into bedrock. The boring locations are shown on Plate <br />1. The borings were angered using four-inch diameter continuous-flight augers. <br />°Undisturbed" samples were taken at five to ten foot intervals using a <br />California sampler at locations indicated on the boring logs. Monitoring wells <br />consisting of 2}" class 200 PVC were installed in borings 2 and 3, upslope and <br />downslope of the waste rock pile respectively. Details of the construction of <br />the monitoring wells are shown on Plate 2. <br />The drilling program was supervised by an experienced GEO-HYDRO <br />_ engineer/hydrologist, who classified the sails encountered by visual and <br />textural examination in the field and maintained a complete log of each boring. <br />These field classifications were supplemented by subsequent office inspection <br />and laboratory classification. <br />The nomenclature used to describe the various soil types is described on <br />Plate A-1, Unified Soil Classification. The key to the logs of borings is shown <br />on Plate A-2, and the logs of borings are presented as Plates A-3a through A-5b. <br />Field permeability tests (falling head tests) were performed in the two <br />shallow borings (Borings lA and 1B) as well as in the two monitoring wells <br />(Borings 2 and 3). The locations of these borings are indicated on Plates 1 and <br />2. The results of these tests are summarized below. <br />aEaNVnvo cowsnnrw. iwc. <br />