2014-12-10_HYDROLOGY - M1977208 - Laserfiche WebLink

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RECEIVED �C 10 2014 ZCC-MCX DIVISION OF RECLAMATION December 9,2014 MINING AND SAFETY (DR � 61 Nf�� Mr.Michael Cunningham Via FEDEX Environmental Protection Specialist TRK 7721 41o9 6247 L� Division of Reclamation,Mining and Safety 1313 Sherman Street, Room 215 Denver,Colorado 80203 ve Re: CEMEX Lyons Mine Permit M-1977-208 Technical Revision No.12,Revised Groundwater Monitoring Plan Third Quarter 2014 Monitoring Data-Updated Dear Mr.Cunningham: This letter transmits the surface water and groundwater data associated with the sampling of cement kiln dust disposal area(C-Pit).This report,which is an updated version of the October 22,2014 submittal,includes data from the C-Pit ponded water and related groundwater monitoring for the third quarter of 2014,covering the reporting period July 1, 2014 to September 30,2014.Table 1 presents data for the last four quarters. For the third quarter compliance monitoring,water samples were collected on August 25,2014 from CEM-oo1 and CEM 004 groundwater monitoring wells,and from the C-Pit ponded water. Inspection of the CEM 005 well on the same day indicated that it did not produce any water. The samples collected from C-Pit ponded water and groundwater wells were analyzed for pH,chloride,sulfate,total dissolved solids,selenium,and thallium.The reported pH data is based on the pH analysis performed at the time of collection(Table 1). In addition,a Stiff Diagram of the groundwater cation/anion data from CEM 004 compared to 9o% of the average cation/anion concentration in C-Pit is provided in Figure 1 for reference. CAIAverage O� CAKW%Anrage 82512014 CEM 004 Calcium Bicarbonate (as CaCO3) Magnesium Carbonate Potassium 4 1 Chloride Sodium Sulfate 00 00 40 20 0 20 40 00 80-ql. CEM 001 n25R014 Figure 1:Third quarter cation/anion data for CEM-o04 compared to the TR-12 C-Pit Monitoring and Trigger Parameters.