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2001 Soil Sampling: Seneca Mine, Hayden Colorado <br />• Introduction <br />Seneca Mine, Hayden Colorado contracted with Intermountain Resource Inventories <br />Inc., James R. Irvine, CPSS ARCPACS #2404, principal investigator to conduct on <br />site soil sampling. Soil sampling was conducted to comply with Permit C-80-005. <br />This report outlines the procedures, results and conclusions obtained during <br />sampling and after sample results were returned from the laboratory. <br />Sampling Location <br />Two sites were sampled. The first site is located at Seneca II mine. The second site <br />is located at the Seneca II-W mine. The Seneca II site consisted of 10 soil sample <br />sites in the southern and western portion of the mine area. The Seneca II-W site <br />consists of 10 soil sample sites in the western and northern portion of the mine area. <br />Sample locations are shown in Appendix V, maps 1 and 2. <br />Sampling Procedures <br />For both sampling areas, sites were chosen at random within 25 acre blocks. <br />Sample sites are located on maps 1 and 2 (Appendix-V). In the field, the sample <br />sites were located using GPS and recorded. Sampling methodology was consistent <br />• at both sites and occurred August 31~ through Sept 2nd 2001 while vegetation was <br />still vital. <br />Soil- Once a site was located in the field, Seneca Mine personnel. excavated <br />sampling pits with a backhoe to a depth of 5 feet using a 2 foot wide bucket. <br />Exposed pits provided adequate room to determine topsoil horizons from upper spoil <br />horizons. Horizon delineation based on soil color, texture, consistence, coarse <br />fragment content, chemical reactivity, root penetration, and structure was recorded. <br />Photographs were taken of each sample pits soil profile with horizon depths <br />delineated for the photo. Horizons were labeled A indicating horizons developing in <br />replaced topsoil and B for soil developing in the replaced subsoil material. One-half <br />gallon samples were collected along with bulk density samples from each horizon in <br />the soil profile for laboratory analysis. Samples were collected using stainless steel <br />shovels and placed in sterile Tyvek• sample bags. Bags were label as to site <br />number, horizon and depth recorded in inches. Samples were sent to Colorado <br />State Universfty Soil, Water and Ptant Testing Laboratory, Fort Collins Colorado for <br />analysis The University conducted the following tests with soil analysis methods <br />listed in Appendix III Table-1. <br />Texture <br />Bulk Density <br />Lime Estimate <br />Calcium <br />• Magnesium <br />Sodium <br />Phosphorous <br />Page 4 of 10 <br />11 /09/01 <br />