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Maria Talvitie <br />?pte?nber 3a, X009 <br />Pale 2 <br />annually on alarriity Dxaw and west Lateral Ditch and annually on Tuttle Draw. <br />Monthly field parameters are collected at all five lacatians? Flow vaxiability in both <br />calamity Draw and Tuttle Draw axe largely influenced by ixrigatian from. about mid- <br />April to Enid-Dctaber. ?s stated by 'F in their revision application based ors data <br />collected franc the mine site, TD varies mare with respect to flaw than anything else. It <br />is reasonable to assume that potential impacts from mining would be best characterized <br />by sampling during nanMirrigatian season. Further, a determination of the probable <br />hydrolagac Consequences of the coal mining activity an e permit and add scent areas <br />with respect to hydralog?c regime ?s zequired under all seasonal cond?tlans. The <br />hydrologic ronitoring plan is developed based in part on the probable hydrologic <br />consequences. Therefore, the Division believes that sampling only once per year would <br />not provide adequate analyses of potential mining impacts clad would not adequately <br />characterize seasonal variations. <br />The D?vis?an w?11 require ?wFC to do semi-annual full suite laboratory analysis and semi^ <br />annual field analyses per the parameters listed an Table 2.04.72 for all five approved <br />surface water sites The scrupling should be conducted ante during the irrigation season <br />and once again in the non?irrigation season ever?r year. This will provide carne relief <br />from the monthly field monitoring as requested by wF?, but more importantly wi11 <br />provide a reasonable and consistent approach to the surface monitoring program. Please <br />revise and update the pertinent sections 2.04.7 in the permit appl?cat?on package <br />including Table 2.04.7- l . <br />Let me knave if you have questions or require additional inforatlan. <br />C; dandy Brawn