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40� GCC <br /> Rio Grande <br /> Pueblo Plant <br /> November 19, 2018 <br /> Mr. Elliott Russell <br /> Environmental Protection Specialist <br /> Division of Reclamation and Mining Safety <br /> 1313 Sherman St. Room 215 <br /> Denver, CO 80203 <br /> Re: Pueblo Cement Plant and Limestone Quarry, DRMS Permit No. M-2002-004 <br /> Quarterly Groundwater Monitoring Report(MW006 and MW007) <br /> Dear Mr. Russell: <br /> Pursuant to TR-06 of the referenced permit, GCC conducted water sampling on its groundwater monitoring <br /> wells MW-006 and MW-007 on 09/26/2018 and 09/27/2018. <br /> Groundwater samples for well MW-006 could not be collected on 09126/2018, as only 1.25 casing volumes <br /> were purged before bailing the well dry.Following our sampling protocol, well MW-006 was retested three (03) <br /> hours and twenty four(24) hours after initial attempt, at which point GCC determined there was not enough <br /> volume for a representative groundwwater sample analysis. <br /> Groundwater monitoring well MW-007 was also bailed dry after 2.0 casing volumes were purged.Additional <br /> attempts were made three(03), six(06)and twenty four hours(24)after initial attempt, after which GCC <br /> determined there was not enough volume for a representative groundwater sample analysis. <br /> These results confirm low groundwater yield for groundwater wells"fed"by the unfractured Fort Hayes <br /> Limestone. <br /> Following TR-06 guidelines, GCC will continue to monitor wells MW-006 and MW-007 during this present <br /> Quarter(4th Quarter 2018). GCC will conduct monitoring during the month of December 2018. Results will be <br /> submitted within the applicable timeline should representative groundwater samples be collected. <br /> Should you have any questions/comments about this submission, please contact me at(719)647-6861 or <br /> eolivares gcc.com <br /> inc ly <br /> in Oliv es <br /> nvironme al Enfer <br /> GCC Rio Grande,Inc.• Pueblo Plant <br /> 3372 Lime Road•Pueblo,CO 81004 <br />