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(h) Operation Water Use: <br /> As necessary, Applicant will purchase water from the City of Greeley for dust suppression and <br /> other nonsubstantive industrial uses on the site.Applicant estimates that it may use <br /> approximately 3000 gallons of water per operating day for these purposes. <br /> (i) Groundwater/Surface Water Disturbance: <br /> Groundwater will not be exposed by the mining activities. The Applicant expects that there will <br /> be no impact to groundwater from the proposed operation as, based on the drilling records for the <br /> domestic water well located on the subject property (see Exhibit B, section(c)),the nearest depth <br /> to groundwater is approximately 170 feet, and the aquifer is isolated with an overlying aquiclude. <br /> In addition,the proposed operation will not result in any discharge into surface waters. <br /> Stormwater runoff from disturbed areas will drain into the gravel pit and will seep into the <br /> ground within 72 hours. The gravel pit floor will be graded as extraction occurs. Applicant plans <br /> to manage storm water by utilizing best management practices based on guidance from the <br /> Colorado Department of Transportation Erosion Control and Storm Water Quality Guide.' <br /> Sediment transport from storm water will be minimal. Management practices can be found in <br /> Exhibit C-2, Storm Water Management Plan. <br /> (j) Existing Water Rights: <br /> Existing water rights will not be affected by the proposed gravel pit. <br /> (k) Refuse and Acid or Toxic Materials: <br /> There are no known refuse, acid, or toxic-producing materials in the area of the proposed gravel <br /> pit. If they are encountered, operations will cease and the materials will be contained in <br /> accordance with applicable laws and regulations. <br /> (1) Measures to Minimize Disturbance to Hydrologic Balance, Off-Site Damage, and <br /> Provide for a Stable Configuration of the Reclaimed Area Consistent with the Proposed <br /> Future Land Use: <br /> Hydrologic Balance—The proposed operation impacts on the hydrologic balance will be <br /> minimal. Groundwater will not be encountered. <br /> Off-site Damage—The-boundaries of the site will be clearly marked to prevent off--site damage <br /> during the excavation activities. <br /> Stable Configuration—During mining, side slopes to the pit will be graded for stability and will <br /> be revegetated as needed to meet the reclamation plan. <br /> (m)On-Site Processing: <br /> https://www.codot.gov/programs/environmental/water-quality/documents/erosion-storm-quality. <br /> Oak Creek Consulting and Production Services,LLC Page 3of 4 <br /> Construction Materials Limited Impact(110(c))Operation Reclamation Permit Application Form <br />