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1 <br />T~_t Pitting <br />1 <br />1 <br /> <br />1 <br /> <br /> <br />1 <br />1 <br />1 <br /> <br /> <br />APPENDIX A <br />Field Investigation <br />As part of the geotechnical investigation, I S test pits (TP-I thru TP-I S) were excavated and logged <br />in the area of the mill expansion project. The test pit locations are shoHm on Drawing C-l. A summary of <br />the test pits excavated, purpose, and the corresponding facility area is provided on the accompanying table. <br />All test pits were excavated and logged by ITEC. Individual logs for each of the test pits were not made <br />available to MFG however, the information gathered from the test pits is included in Appendix B. <br />Tnttt.e A-1 <br />TEST PIT PURPOSE SU~tptAR\' <br />Test Pit Nos. Location Pur ose <br />TP-1 thru TP-10 Tailing Pond Topsoil depth, suitable random fill borrow, foundation <br /> characteristics, depth of bed rock. <br />TP-11 thru TP-14 Water Pond Topsoil depth, suitable random fill borrow, foundation <br /> characteristics. de th of bedrock. <br />The test pits were excavated using a rubber tired backhoe. The test pits were advanced to a <br />maximum depth of 12 feet or to practical refusal of the excavator. In many cases refusal occurred at a depth <br />of less than 5 feet. The test pits were excavated during the month of May, 1998. These test pits were located <br />and logged by ITEC. None of the materials encountered from the test pitting program were sampled for <br />laboratory testing. <br />Representative undisturbed hand-driven samples and large bulk samples of the materials present <br />during MFG's site visit were obtained for laboratory analysis. The sample locations are shown on Drawing <br />C-1. These select samples were delivered to Knight Piesold's geotechnical laboratory in Denver, Colorado. <br />A description of the laboratory testing program can be found in Appendix C. <br />' Field Manoi~ne <br />1 <br />1 <br />In conjunction with the test pitting, field mapping was completed as part of the site investigation to <br />assist with the future estimation of material quantities and determination of the existing foundation <br />conditions. The emphasis of the field mapping vas to identify the extent of outcropping rock, unsuitable <br />materials, and potential borrow areas. The results of the field mapping are shown on Drawing C-l. <br />' A-l <br />