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Banks and Gesso, LLC <br />Water Quality Control Division. In the small areas where such diversion is impractical, <br />other types of BMPs such as silt fences, will be utilized for sediment control. As part of <br />the Colorado Discharge Permit System (CDPS), the site will be visually monitored <br />weekly to ensure water quality. Water will be sampled monthly with monitoring reports <br />submitted to CDPHE quarterly. All dewatering and washing operations will be <br />appropriately permitted. <br />The active mine pit and settling ponds will provide the majority of the sediment control <br />for the Permit Area. Best Management Practices (BMPs) will be utilized to either divert <br />runoff into these facilities for treatment or to provide ultimate sediment control, where <br />necessary. Examples of BMPs that will be used to divert runoff either into the pit or <br />settling pond include berms or small ditches. <br />Groundwater <br />There are water wells located on the subject property and several off-site wells located <br />within 600 feet of affected areas. Most wells in the vicinity are for irrigation purposes. <br />The applicant/operator commits to following rules and regulations of the Office of the <br />State Engineer regarding wells within 600 feet of the mining operation. Several wells in <br />the vicinity have been identified and included in the engineering evaluation of <br />groundwater effects. No water quality issues at these wells are anticipated to result from <br />the operation. The groundwater surface may be depressed at some wells in the <br />immediate vicinity of the site. <br />The operator continues to study groundwater effects and will pursue appropriate <br />mitigation strategies if significant effects are identified through the course of study. <br />Effects on groundwater may be mitigated through augmentation and/or engineering <br />(e.g., slurry wall to limit/prevent the exposure of groundwater). <br />Sundance Sand and Gravel Resource 06015 <br />Lafarge West, Inc. 19 September 2006 <br />