2020-08-05_REVISION - M1999058 - Laserfiche WebLink

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C. Downgradient#1 (DG 1) The first downgradient sample point is a mid-point on Yule Creek, approximately halfway between the point of release and where the release was observed daylighting. D. Downgradient#2 (DG 2) The second downgradient sample point is located on Yule Creek cross-gradient from the sump area where the release daylighted. E. Downgradient#3 (DG 3) The third downgradient sample point is located approximately 1 10 feet below the sump basin, within the discharge path where pooling occurred. DG 3 is currently a confluence point of the sump discharge path and Yule Creek. F. Downgradient#4 (DG 4) The fourth downgradient point is located on Yule Creek at a distance of approximately 408 feet from the sump basin. G. Downgradient#5 (DG 5) The furthest downgradient point is located on Yule Creek at a distance of approximately 790 feet from the sump basin. H. Confluence Point The confluence point is where Yule Creek and the Crystal River(including water features supplied by the Crystal River) meet. The sample point is located approximately 100-150 feet upstream from where Yule Creek discharges into a wetland area that is influenced by the Crystal River. It should be noted that DG 3 was established during a period of low flow. The actual confluence point of the discharge water from the sump basin and Yule Creek may change with the varying water levels, thereby requiring DG 3 to move as the sump basin to Yule Creek confluence point changes. IV. Sampling Schedule A. Winter Sample Schedule During the winter months when snow accumulations prevent personnel from safely accessing sample locations and where the underlying ground support or terrain cannot be determined, surface water sample collection will be limited to the following locations, access dependent: • UG 1 • DG 3 • DG 4 • Confluence 2