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Require- <br /> <br />Requirement Requirement <br /> <br />citation ment <br />complied <br />Comment <br /> with ? (yes <br /> / no) <br />K. Parameters <br />to be <br />analyzed in Exhibit 14 of <br /> <br />ground CDRMS mining yes All required parameters were analyzed. <br /> <br />water permit C-82-056 <br />samples <br />L. Restoration of <br />ground water Surface facilities and underground workings of the Foidel Creek Mine lie downhill from <br />recharge to CDRMS regulation <br />es the outcrop belt that rims the Twentymile Park Syncline. Ground water is recharged in <br />approximate <br />rox 4.05.11(3) y this outcrop belt. The mine has not disturbed the rocks in this outcrop belt and, <br />r <br />in rate consequently, does not diminish the amount of recharge. <br /> Compliance with the Basic Standards for ground water, as explained in item F, above, <br /> indicate the permittee is preventing adverse impacts to ground water quality outside the <br /> permit area. Monitoring data indicate the permittee is preventing impacts to water quantity <br /> outside the permit area. Previous years' hydrology reports indicated mining has dropped <br /> the potentiometric surface of the Wadge overburden by about 200 ft. in undermined areas <br /> (wells 93M001, 93M003, and FBR11AO), but not in areas beyond mining or the permit <br /> area (well 008-7758). Mining has not dropped the potentiometric surface of the <br />M. Prevention of Twentymile Sandstone outside the permit area in wells 91-M005 and FBR-11B. Between <br />adverse impacts <br />CDRMS regulation 2002 and 2005, the water level in the Twentymile Sandstone within the permit area in well <br />to ground water 4 <br />05 <br />11 yes FBR-2 dropped 55 ft. and TDS increased in 2005 by approximately 200 mg/l. These <br />systems outside . <br />. changes may have resulted from the well's proximity to the end of panel 16 RT and the <br />the permit area outcrop of the Twentymile sandstone. The Twentymile would not be a confined aquifer <br /> near the outcrop and, consequently, could have relatively wide water level fluctuations. <br /> Pumping for mine use of Trout Creek sandstone well 001-83-106 is probably the cause of <br /> a drop of few hundred feet in the potentiometric surface of the Trout Creek Sandstone at <br /> that well and at another Trout Creek Sandstone well, 001-83-107. These drops are <br /> probably only a local impact because the two wells are near the Trout Creek Sandstone's <br /> updip outrop belt; therefore, the impact would not be expected to extend beyond the <br /> permit area. <br />Page 5