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SECTION 1 <br />INTRODUCTION AND SAMPLING OBJECTIVES <br />The Colorado Division of Minerals and Geology (DMG) developed conditions to the mine <br />permit for the GCC Rio Grande, Inc. Red Rock Plant and Limestone Mine. Condition #1 calls <br />for groundwater sampling of the St. Charles River alluvium, Dakota sandstone aquifer, and, if <br />encountered, Codell sandstone aquifer for a minimum of five quarters prior to the start of <br />mining. This Groundwater Sampling Plan (Sampling Plan), intended to meet the requirements of <br />Condition #1, was developed by GCC Rio Grande, Inc. in coordination with outside technical <br />consultants. Brown and Caldwell (or other DMG- approved consultant) will implement the <br />Sampling Plan. The Sampling Plan describes groundwater sampling and analysis procedures for <br />obtaining chemical data to define the baseline groundwater conditions of potentially affected <br />aquifers. <br />P•\ Data\ GEN\ F- S-P -T\ 22421 \ Permitting \Stipulation Response \Groundwater Sampling Plan \Condition 1 Groundwater Sampling Plan 3_24_03.doc <br />1 <br />