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Red Creek Quarry Baseline Water Investigation Table of Contents iv DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. List of Figures Figure 3-1. Generalized stratigraphic section of the Bear Creek and Red Creek sites ........................3-1 Figure 3-2. Groundwater Well Locations .................................................................................................3-4 Figure 3-3. Aquatic resources map of Red Creek quarry site ................................................................3-9 Figure 3-4. Surface water monitoring and observation locations ....................................................... 3-11 Figure 5-1. Transducer and barometric pressure readings ................................................................ 5-10 Figure 5-2. Transducer data calculated head and measured staff gauge head ............................... 5-11 Figure 5-3. Corrected transducer head and measured staff gauge head .......................................... 5-11 Figure 5-4. Flow rates from corrected transducer and staff gauge data ........................................... 5-12 Figure 6-1. Piper diagram of the groundwater well data ........................................................................6-2 Figure 6-2. Piper diagram of the surface water well data ......................................................................6-2 Figure 6-3. Piper diagram of all surface and groundwater well data ....................................................6-3 Figure 6-4. Stiff diagram of the surface and groundwater data (December 2022) .............................6-4 Figure 6-5. Stiff diagram of the surface and groundwater data (February and March 2023) .............6-5 Figure 6-6. Stiff diagram of the surface and groundwater data (May 2023) ........................................6-6 Figure 6-7. Stiff diagram of the surface and groundwater data (July 2023) ........................................6-7 Figure 6-8. Scatter plots of groundwater metals/metalloid concentrations ...................................... 6-10 Figure 6-9. Water Quality Control Division Surface Water Segmentation Designations ................... 6-12 Figure 6-10. Time trend plot of dissolved selenium for surface and groundwater ........................... 6-13 Figure 6-11. Time trend plot of dissolved sulfide for surface and groundwater ................................ 6-13 Figure 6-12. Red Creek flow data and daily precipitation totals from K1V6 weather station .......... 6-17 List of Photographs Photo 2-1. Surface water seep identified as SW SEEP ..........................................................................2-4 Photo 2-2. Unnamed seep within the Red Creek drainage ....................................................................2-4 Photo 2-3. Downstream most point of Red Creek with observed water ...............................................2-5 Photo 2-4. Upland area on the site looking north from the road ...........................................................2-5 Photo 3-1. Mineralized Fracture within the Red Creek Drainage ..........................................................3-2 Photo 3-2. Air rotary drilling operations for monitoring well installation ...............................................3-3 Photo 3-3. Surface water flume after installation ................................................................................ 3-12 Photo 3-4. Staff gauge inside the flume and port to standpipe .......................................................... 3-13 Photo 3-5. Plastic standpipe attached to the flume for transducer ................................................... 3-13