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TABLE 15-9 <br />Surface Water Monitoring Frequencies <br />Yoast Mine <br />Site Name Discharge Water Quality (A) <br />YSSF3 (upper Sage Creek) Triannual Triannual <br />YSS2 (lower Sage Creek) Triannual Triannual <br />YSGF5 (upper Grassy Creek) Triannual Triannual <br />YSG5 (lower Grassy Creek) Triannual(B) Triannual(B) <br />NPDES Sites See Page 25 <br />S ra inQs <br />YSSPGI (Annand Draw) Annual Annual <br />YSSPG2 (below 011a) Annual Annual <br />YSSPG3 (above 012, south) Annual Annual <br />YSSPG4 (above 012, north) Annual Annual <br />Water Quality Triannual = Water samples will be analyzed according to the surface water parameter list as <br />given in Table 15-5 during snowmelt runoff (April), post-runoff (May or June), and baseflow (September). <br />Water Quality Annual = Water samples will be analyzed according to the surface water parameter list as <br />given in Table 15-5 (May thru July) <br />(A)If flow is less than 5 gallons per minute, then only field parameters will be measured. <br />(B)For site YSG5, triannual discharge measurements and water quality samples (total dissolved solids) will <br />take place during May, July, and September. <br />* Indicates a deletion in text. <br />\J <br />TR-34 <br />24 <br />Revised 04/07