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• <br />3.3.4 Site Ground Water <br />3.3.4.1 Introduction <br />Hydrogeological field studies, including the establishment of a <br />groundwater monitoring system of the NCEC Permit Area, began in <br />late 1981 and have continued through 1989. These studies have <br />included spring and seep surveys, alluvial, colluvial, and bedrock <br />groundwater monitoring, water quality and quantity analyses, <br />aquifer testing and geologic mapping. The results of these studies <br />and the conclusions based on these results are presented in this <br />section. <br />This section includes all data and analyses originally used to <br />establish baseline conditions for a much larger permit area than <br />what is contemplated in this Permit Revision. However, for the <br />purpose of historical consistency, all previous information is <br />included in this document, but in an updated format where possible. <br />• An historical account of the monitoring system as it has evolved <br />with this project is provided to clarify its present status and <br />future requirements. <br />3.3.4.2 Groundwater Monitoring System <br />The groundwater monitoring system has evolved over the past few <br />years in response to an evolving mine plan. The system was <br />originally started in 1981 to establish baseline conditions for all <br />water-bearing units within three drainages, South Canyon, Alkali <br />Creek, and the Colorado River, and the disposal area proposed in <br />the March, 1984 permit. In 1984, the monitoring system consisted <br />of up to 19 wells (Table 3.3-2) and three springs; monitoring <br />locations are shown on Figure 3.3-6. The "as-built" diagrams of <br />bedrock monitoring wells and a typical shallow monitoring well are <br />provided in Appendix 3.3-3. Drilling, completion, sampling, and <br />testing techniques used are discussed in Appendices 3.3-4 and 3.3- <br />• 5. <br />liCBC - Coal Ridge #1 3-21 AeC/1145/900301 <br />