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RECLINE® <br /> ZZCC-MC-x OCT 0 2 zozo <br /> Buildinga better future DMSIQNOFRECLAMATION <br /> MINING AND SAFETY <br /> September 30, zozo <br /> Ms.Amy Eschberger Via FEDEX <br /> Division of Reclamation, Mining and Safety TRK #7716 778o 9925 <br /> Environmental Protection Specialist <br /> 1313 Sherman Street, Room 23.5 <br /> Denver, Colorado 80203 <br /> Re: CEMEX Lyons Mine Permit M-3-977-208 <br /> Technical Revision No. iz, Revised Groundwater Monitoring Plan <br /> Third Quarter zozo Monitoring Data <br /> Dear Ms. Eschberger: <br /> This letter transmits the surface water and groundwater data associated with the sampling of the <br /> cement kiln dust disposal area (C-Pit). This report includes data from the C-Pit ponded water and <br /> related groundwater monitoring for the third quarter of zozo, covering the reporting period from July <br /> 1, zozo to September 30, zozo. Table i presents data for the last four quarters. <br /> Groundwater samples were collected on August 25, zozo from the CEM-ooi and CEM-004 <br /> groundwater monitoring wells and from the C-Pit ponded water. The inspection of groundwater <br /> monitoring well CEM-oo5 on August 25, zozo indicated that there was not enough water volume to <br /> collect a representative sample. <br /> The samples collected from C-Pit ponded water and the groundwater monitoring wells were analyzed <br /> for pH, chloride, sulfate,total dissolved solids, selenium, and thallium.The reported pH data are based <br /> on the pH analyses performed at the time of sample collection in the field (Table 3.). The measured pH <br /> at groundwater monitoring well CEM-004 and analytical results for chloride, sulfate,total dissolved <br /> solids(TDS), selenium and thallium from the August 25, zozo groundwater sample were within the <br /> target levels prescribed by TR-iz, as shown in Table i. <br /> Page 1 of 2 <br />