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Historic Properties Treatment Plan, Collom Mine, Colorado 30 <br />5.0 METHODS <br />5.1 PHASE I TESTING FIELD METHODS <br />The auger tests and 1 x 1 -m test units will be excavated at 10 -cm levels, with 0 -10 cm below <br />surface designated as Level 1, 10 -20 cm below surface designated as Level 2, etc. The entire <br />matrix of each level will be screened through 1/4 -inch wire mesh. (In some cases, auger probes <br />may be used in the base of 1 x 1 -m test units to allow for assessment of buried sediments). The <br />results of the excavation of each test unit or auger test will be detailed on an Excavation Level <br />Form or Auger Test Form. For the formal 1 x 1 -m test units, excavation in 10 -cm levels will <br />continue to a minimum of 20 cm below any level that contains cultural material. <br />Archaeological materials recovered from test units will be separated according to excavation <br />level and artifact type (e.g., bone, debitage, lithic tools) and recorded on a Test Unit Summary <br />form. Additional information recorded on this form will include a level -by -level description of <br />sediment types and changes, the presence or absence of charcoal and heat - altered rock, and other <br />details. Following termination of the test unit, a stratigraphic profile of two adjacent test unit <br />walls will be sketched, sediment descriptions will be recorded for each identified stratum, <br />photographs will be taken, and then the test unit will be backfilled. <br />If a feature (he,, hearth, stained basin) is encountered during the excavation of the test unit, it <br />will be exposed horizontally and recorded with a plan view map and photographs. The feature <br />will then be cross - sectioned, and a drawing of the resultant profile will be completed. Samples <br />for flotation and radiocarbon analyses will be collected from the fill. Feature data recorded in <br />the field will include type; form; shape in plan and both transverse and longitudinal cross <br />section; dimensions; volume; feature fill characteristics; number, weight, and types of fill rock; <br />presence or absence of charcoal and oxidation; associated artifacts; and associated faunal and <br />botanical remains. In addition, thermal features exposed on the surface will be excavated as part <br />of the Phase I testing. <br />47599 TRC Mariah Associates Inc. <br />