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2002 Soil Sampling: Seneca Mine, Hayden Colorado <br />. Introduction <br />Seneca Mine, Hayden Colorado contracted with Intermountain Resource Inventories <br />Inc., Jeffery P. Hahn CPSS, principal investigator, to conduct on-site soil sampling. <br />Soil sampling was conducted to comply with Permit C-80-005. This report outlines <br />the procedures, results and conclusions obtained during sampling and after sample <br />results were returned from the laboratory. <br />Sampling Location <br />One site was sampled at the Seneca II mine. The site consisted of 10 soil sample <br />sites in the eastern central portion of the mine area. Sample locations are shown in <br />Appendix IV, map 1. <br />Sampling Procedures <br />Sites were chosen at random within 25-acre blocks. Sample sites are located on <br />map 1 (Appendix-IV). In the field, the sample sites were located using GPS and <br />recorded. Sampling methodology was consistent and occurred July 22 through July <br />23, 2002 while vegetation was 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 pit's 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 University Soil, Water and Plant Testing Laboratory, Fort Collins Colorado for <br />analysis. The University conducted the following tests: <br />Texture, Bulk Density, Lime Estimate, Calcium, Magnesium, Sodium, <br />Phosphorous, Nitrous Nitrogen, Potassium, Zinc, Iron, Manganese, Copper, <br />Sodium Adsorption Ratio, Organic Matter, pH, Electrical conductivity, Percent <br />Saturation <br />n <br />Page 1 Of 5 07/28/03 <br />