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Arnold Groundwater Characterization <br />November 27, 2017 <br />land, as well as to the North Fork of the Gunnison River. Therefore, all property up -gradient of <br />Mr. Arnold's property drain into and feed his shallow domestic well (at a depth of only 25 feet), <br />his spring creek, ponds and ultimately the river. <br />Review of historical geologic maps and aerial photographs show that the area is underlain by a <br />shallow Cretaceous shale bedrock, which is an aquitard or impervious zone for the accumulation <br />and storage of surface water derived from snowmelt and rainwater. Any potential contaminants <br />that are exposed to the elements will be washed immediately into the perched aquifer and will <br />migrate with time down -gradient. This will potentially contaminate groundwater, surface water, <br />as well as soil, down -gradient from a point source for pollutants. <br />Common sense says there should be no businesses (of the type proposed) initiated in areas that <br />are sensitive to local water supplies and their adjacent communities and environments. It is my <br />professional opinion that the approval of this proposed project will cause a severe environmental <br />impact to the water resources of Delta County and the waters of the State of Colorado. Prior to <br />approval, a complete environmental impact study should be implemented at no cost to the State <br />or County by the proposed owner of such facility and presented to all parties interested for <br />comment. <br />There is no doubt that the State of Colorado would need to permit and approve such a facility. <br />Aside from a detailed SPCC plan, NPDES, and storm water discharge permits, any facility <br />would need to conduct a background groundwater sampling program prior to implementation of <br />the project. Subsequently, an extensive groundwater and surface water monitoring program <br />supported by quarterly sampling would satisfy portions of the proper requirements for the life of <br />the facility and an unknown period of time after closure. <br />Thank you for the opportunity to assist this project. If you have any questions, please contact me <br />either by phone or email. <br />Sincerely, <br />Peter A. Herrera, M.Sc.Geology, C.P.G. #11828, NV C.E.M. #1379, C.E.C.R. #5736 <br />Consulting Geologist and Environmental Manager <br />Attachments: Historic Groundwater/Domestic Water Laboratory Testing Data, Arnold Residence <br />Page 2 of 2 <br />