2012-08-29_REPORT - M2002004 - Laserfiche WebLink

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GCC is maintaining the temporary berm on the south side of the quarry and has extended the existing plant diversion ditch on the east side to prevent the inflow of stormwater from areas outside of Mining Years 1 through 5. 2. Revision No AM -1. On September 27, 2011, DRMS approved a permit amendment to remove 217 acres of the plant site from the current post- mining land use of Range Land and to reduce the financial warranty from the current $5,065,081 to $1,313,475. 3. Technical Revision No. 2. On March 16, 2012 DRMS approved a request for a technical revision addressing the following changes: • Increase annual limestone production tonnage; • Increase annual overburden stripping tonnage; • Increase the number of acres undergoing active quarrying; • Replace the hours of operation requirements for quarrying and overburden activities with a restriction on daily production tonnages; • Increase the amount ofthe reclamation bond to account for additional acreage requiring reclamation; and • Change the name of the facility to "Pueblo Cement Plant and Limestone Quarry." To complete this Technical Revision, GCC has amended its Escrow Agreement to increase the reclamation bond from $1,313,475 to $1,861,000. 4. Ground Water Monitoring. Five ground water monitoring wells have been installed pursuant to the Mining Permit. These wells are identified as MWOO1A, MW002, MW003, MW004 and MW005. MWOO1A, which was completed in the Codell Sandstone, and MW005, which is a shallow well installed near the St. Charles River, have been determined to be dry and have never produced enough water to sample. In a letter dated December 8, 2009, DRMS established numeric protection levels (NPL) for total dissolved solids, sulfate, Radium -226 and Radium -228. According to the letter GCC is to continue semi - annual sampling and analysis of the ground water monitoring wells and to submit an annual report of the results. GCC submitted its annual report for Calendar Year 2011 on February 16, 2012. The TDS results from Monitoring Wells MW -003 and MW -004 obtained during the October 2011 sampling event exceeded the NPLs established by DRMS. As a result, in letter dated February 24, 2012, DRMS required that GCC resume quarterly groundwater monitoring for TDS. GCC obtained First Quarter samples for TDS and the required semi - annual samples for sulfate, Radium -226 and Radium -228 on March 20, 2012. GCC reported the sample 2