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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 three wells and increasing at six wells. <br />CDPHE agricultural ground water standards were exceeded for pH only at <br />one well, YWCU33. 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 <br />Predicted TDS values (mg/1) <br />This year's average TDS (mg/1) <br />YOV30 <br />3201 <br />2590 <br />YW30 <br />2570 <br />7535* <br />YWC33 <br />2721 <br />792 <br />YWCU33 <br />844 <br />YWU30 <br />723 <br />YAAL14 <br />2036 <br />3425* <br />YGAL16 <br />1296 <br />1645* <br />YSAL1 <br />798 <br />1810* <br />YSAL3 <br />798 <br />1135* <br />* indicates value above prediction <br />At Annand Draw alluvial well YAAL14, the average TDS value observed this <br />year was 3425 mg/l. This value exceeds the predicted value of 2036 mg/l. <br />