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~I.AFARGE NORTH AMERICA Construction Materials The following problem identified in the February 2005 inspection report pertains to the Riechert property. The stated regulations, Rule 3.1.5, requires the operator to submit information regarding placement of inert fill material on the Site, and Rule 3.1.6 states in summary that disturbance to the hydrologic balance to the quality of water in the surface and groundwater systems shall be minimized both during mining and reclamation. The DMG is requiring Lafarge to address the following: • Address the requirements for Rule 3.1.5 for all f Il generated outside of the permit area to be used in reclamation. Response: Lafazge's inert fill agreement and master service agreements are attached. The agreements describe the procedures, indemnifications and requirements for all third parties prior to third parties being allowed to backfill or dump inert fill on the Reichert property. Lafarge further understands that prior to deposition of inert fill onto the Reichert property, Lafarge must be authorized by the DMG. A letter stating Lafarge's future intentions to backfill the property is attached for your review, and will not allow dumping from Lafazge sites or third party sites until authorization is granted by the DMG. • Clarify how the operator verifies on site that the material is clean and inert, and that wood and wood products are not bacl~lled into the pit. Response: The clean fill agreements are step 1 in assuring the only inert fill material is deposited on the site. Lafazge employees perform weekly inspections during times of deposition and work and grade the inert fill backfill piles. If during this time materials other than inert material is identified the materials identified as not meeting the inert criteria are segregated during the grading process. The third party who brought the material is notified to remove said materials. Lafarge will need to ensure that any concrete disposal must be hardened for at least 60 days, and describe the hardening and dumping procedures to ensure this requirement is met. Response: On February 3, 2005, following the inspection, concrete disposal from the ready mix trucks was no longer allowed on the Reichert property. On approximately February 15, 2005, Lafarge removed the pump, backfilled the sump and backfilled the remaining hole using onsite materials and a D9 dozer. Photographs are attached for your review. The only concrete allowed on-site will be concrete rubble from Lafarge sites and off site that meet the criteria of the clean fill agreements. LAFARGE WEST INC. -Lafarge Construction Materials 1800 N. Taft Hill Road Fort Collins, Colorado 80552 Office: 970-407-3600 Fax 970-407-3900