2016-04-22_INSPECTION - M1982121

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Bureau of land Management Colorado River Valley Field Office Minerals Inspection Report During earthwork operations in this area earlier this month,the dozer,with Justin inside,slid down the embankment and drainage.The dozer is now located at the base of the mill bench in the unnamed drainage (Photo 4).Justin was able to walk away. He plans to drive the dozer back up to the mill bench via a recently- constructed trail that climbs up to the southeastern portion of the mill bench. Deer were observed walking and browsing along the Middle Road during my visit to the operation (Photo 5). In the equipment yard west of the mill facility, I observed a parked loader,skid steer,excavator,and road grader, as well as various mine supplies. Duct work within this area is planned to be recycled.A portable diesel fuel tank was observed sitting on a pallet without secondary containment(Photo 6).The 2015 CRVFO RMP— Appendix K BMPs state: "MIN-7: Project materials which could be a hazard to public health,safety or resource value will be stored in appropriate secondary containment. No oil or lubricants will be drained onto the ground surface."Additionally, per BMP MIN-50: "Standard secondary containment shall hold 110%of the capacity of the largest single tank it contains and be impervious to any oil,glycol, produced water,or other toxic fluid for 72 hours. Earthen berms must be compacted and of fine material that will prevent seepage of any spill to surrounding area." The mill facility,which was authorized by BLM correspondence dated June 15,2009, contains a small lab on the western side and crushing,grinding,and bagging equipment on the eastern side within the large main portion of the building. I observed spilled lubricant with kitty litter on the floor of the main portion of the building(Photo 7).This area needs general housekeeping. Topsoil is stored on the far western side of the mill bench (Photo 8).This stockpile appeared to be approximately at a 2:1 slope and inadequate for future site reclamation.According to the stipulations included in BLM's approval of Amendment 1,dated July 21, 1989: "The stored topsoil will be graded to a slope of approximately 4:1 to prevent erosion and to facilitate seeding and establishment of grasses." A small patch of mullein was observed north of the topsoil storage area. CaIX hires EcoRx to provide weed management services.A Pesticide Use Plan (PUP) is in place with the BLM. On the east side of the production bench, I observed two fuel tanks on skids within secondary containment,an empty and unusable water tank,and an excavator.A portion of highwall on the eastern side was deemed unsafe by MSHA and CaIX was required to place a berm on the production bench to keep individuals out of the unsafe area. CaIX intends to expand the quarry towards the northeast in the future and address the safety hazard by scaling away the unsafe material. If the disturbance is projected to fall outside the permitted boundary,a Plan of Operations Modification will be required. On the western side and of the production bench,there is a material stockpile area and portable screening and sorting equipment. I also observed a poly water container in use near the screening equipment(Photo 9). After blasting,the rubblized material is pushed down from the mine benches to the production bench and then transported to the stockpile.The limestone material is transported from the stockpile to the portable equipment and screened and sorted. Fines are transported to the fines stockpile,which is located on the mill bench,east of the mill building(Photo 10).Screened and sorted material is transported via conveyer belt system and ejected onto the mill bench.This material is then transported via another conveyer belt system into the mill building for further crushing and grinding. Page 3 of 10