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(k) Results from Huffman Labs provided below show no acid or toxic producing materials would be encountered during the surface trenching process. Note: The only negative (-1) ABP from top soil sample is caused by decaying pine needles and related ground media. Attached is Illustration 3 that provides location and depth of samples taken for Huffman Labs test. Huffman Client S,% S,% S,% S,% S,% C,% AGP NP ABP Sample No. Sample No. HCI Insol HNO,insol total "sulfate" "pyritic" carbonate CaCO3g/kg CaCO3gifcg CaCO3g,kg 124915-01/133015-01 1 0.02 NA 0.04 0.02 NA <0.02 -0.6 0.0 -1 124915-02/133015-02 2 <0.01 NA 0.29 0.29 NA <0.02 0.0 0.0 0 124915-03/133015-03 3 <0.01 NA 0.20 0.20 NA <0.02 0.0 0.0 0 124915-04/133015-04 4 <0.01 NA 0.06 0.06 NA <0.021 0.0 0.0 0 124915-05/133015-05 5 <0.01 NA 0.05 0.05 NA <0.02 0.0 0.0 0 Samples were received as coarse ground material and splits were reground to nominal-200 mesh(<75 urn)prior to analysis. Analyses were performed in duplicate with averages reported. Sulfur forms were not analyzed(NA)at this time. Acid generation potential is calculated from initial analyses assuming all sulfur present is sulfide sulfur and contributes to AGP;this number could possibly be reduced by doing sulfur s peciation and subtracting sulfur that has already been - oxidized to sulfate and no longer able to contribute to the AGP. AGP Acid Generation Potential all potentials expressed in grams CaCO3 per kilogram soil NP Neutralization Potential grams per kilogram=tons per thousand tons=parts per thousand ABP Acid Base Potential negative sign denotes CaCO3 deficiency(potential acid excess) (1) Describe measures will be taken to minimize disturbance to the hydrologic balance, prevent off-site damage, and provide stable configuration. • This is a very small mining/trenching operation that is typical only 6 to 10 feet wide and will get refilled about every 30 ft so only a very limited amount of trench will be opened at any given time. Amount of trench opened at any given time is constrained by steel plate holders for waste rock. • Trench to be backfilled and reclaimed as described in other areas of mining plan plus lined with new top soil as required and replanted. Note: No top soil will be imported from other locations. • Best practice of methods including " and hydromulching of seed mixtures during back fill and road disturbances. See Illustration 2. • Replanting of disturbances as an ongoing process once an area has been refilled or road widening completed. Teton Drilling Inc. Dixie Mine-Clear Creek County,CO Updated Revisions—October 30,2018 Page I 5