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Sample Site <br />Desi ation Sam le Site Location Pu ose <br />MW-001 ],440 feet west, and 200 feet north of Recently installed montoring well. This well <br /> the southeast Comex of Section 13 will be abandoned and MW-OOIA will be <br /> Township 22 South, Range 65 West. monitored instead to observe the existence <br /> Screened across the Codell of groundwater in the Codell sandstone. <br /> sandstone. <br />MW-OOlA 1,000 feet west, and 1,550 feet north Proposed monitoring well that will be <br /> of the southeast comer of Section 13 installed to replace MW-001, as MW-001 <br /> Township 22 South, Range 65 West may be disturbed during mining. If ground <br /> Screened across the Codell water is observed, the site will be sampled to <br /> sandstone. establish baseline groundwater conditions <br /> within the Codell sandstone a uifex. <br />MW-002 2,600 feet west and 3,000 feet north Proposed background/ambient well. The <br /> of the southeast corner of Section 12, site will be sampled to establish baseline <br /> Township 22 South, Range 65 West groundwater conditions within the St <br /> Screened moss the St. Charles River Charles River alluvial aquifer at the upstream <br /> alluvial a uifer. xo e boon <br />MW-003 1,800 feet west and 1,800 feet south Proposed motritorisrg well located <br /> of the northeast corner of Section downstream of the proposed thine <br /> 12, Township 22 South, Range 65 stormwater discharge to the St Charles <br /> West. Screened across the St. River. The site will provide background <br /> Charles River alluvial aquifer. measurements for future comparison to <br /> levels found at this site in the St. Charles <br /> River alluvial a uifex durin tninin . <br />MW-004 1,200 feet west and 400 feet south Proposed compliance well located <br /> of the northeast comer of Section downstream of the monitoring well (MW- <br /> 12, Township 22 South, Range 65 003). Activities between MW-003 and MW- <br /> West. Screened across the St. 004 will be under GCC Rio Grande Inc.'s <br /> Charles River alluvial aquifer. control. The site will be sampled to establish <br /> baseline groundwater conditions within the <br /> St Charles River alluvial aquifer at the <br /> downstream roe bound <br />3.2 Timing/Scheduling <br />$eginning the week of April 14, 2003, groundwater samples, field parameters, and groundwater <br />elevation measurements will be collected monthly until the anticipated start of mitring in September <br />2004. The anticipated sampling dates axe listed below in Table 3-3. Unexpected circumstances or <br />adverse weather/site conditions may require that a samp]ng date be rescheduled. The Sampling <br />Plan will be updated with changes and DMG will be informed of the change in sampling schedule. <br />Table 3-2, Monthly Groundwater Sampling Schedule <br /> Activi <br />2003 <br />A ril Be ' oundwater sam lin 4/17J03 <br />Ma Groundwater sam lin 5/22f03 <br />~m\cec+~F-sr-'nxxan~v<mdm~g\supuheon a~,ca,.e\c~~dw.n. s~r,r a ria~\eo~a;~„ i c~o~~~.a s~„Pwg eia~ 3 2a as.ao~ <br />