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Grassy Creek Alluvial Well SGAL70 are provided in this AHR on Table 7. • <br />Data from Well SGAL70 may be found in the Peabody Sage Creek Mine AHR, <br />Appendix C. No exceedances of those standards were observed the sample <br />collected from this well this year. <br />The ground water standards for Sage Creek Alluvial Well YSAL3 are <br />provided in this AHR on Table 8. Data from Well YSAL3 may be found in <br />Appendix C of this AHR. No exceedances of those standards were observed <br />on the sample collected from this well this year. <br />Ground Water Summa <br />TDS trends are decreasing at four wells and increasing at five wells. <br />CDPHE agricultural ground water standards for pH were exceeded at one <br />monitoring well. In the area surrounding Yoast, ground water is not <br />being pumped for irrigation or livestock watering purposes, nor has the <br />CDPHE classified any aquifer in this region for any use. The above <br />discussion is provided only to serve as a comparative basis to judge <br />ground water quality. <br />In the Probable Hydrological Consequences (PHC, Tab 17, Attachment 17-5) <br />section of the Yoast Mine PAP, predictions were made as to the expected <br />TDS increases to be observed at various monitoring wells. The following <br />table outlines these predictions along with this year's observed average <br />values (annual average for bedrock wells, May-September average for <br />alluvial wells). <br />Well Predicted TDS values (mg/1) This years average TDS (m /1) <br />YOV30 3201 2020 <br />YW30 2570 3580* <br />YWC33 2721 810 <br />YAAL14 2036 2850* <br />YGAL16 1296 1480* <br />YSALl 798 880* <br />YSAL3 798 1130* <br />* indicates value above prediction <br />6