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• (Page 2) MINE ID r>` OR PROSPECTING ID aX M-1987-064 INSPECTION DATE 05/30/01 INSPECTOR'S INITIALS RCO OBSERVATIONS This inspection was performed as part of the Division's monitoring of Construction Materials 112 permits. The operator was contacted about the inspection, and a time was arranged to meet at the site. The operator named on page one was present throughout the inspection. The required permit ID sign was posted at the entrance to the site. Permit boundary markers were observed along the fencelines on the west side of the processing area and along both river banks to the north. The markers along these banks must be maintained to ensure that gravel bar mining is carried out in the permit area and that any mining-related bank instability can be identified. The banks appeared stable. The west bank is largely riprapped and vegetated. The east bank has newer and more extensive riprap installed (including concrete slabs and placed concrete blocks 8' x 40" x 3' in size) which is not yet well vegetated. The east edge of the process yard is riprapped and bermed to control stormwater and process water runoff. The operator has not formally begun any reclamation yet, such as grading, topsoil placement or seeding. There is some limited grading involved with the streambank stabilization. The processing and stockpile area is approved for apost-mining land use of "commercial-industrial" which carries limited reclamation liability. It mainly involves removal of debris and contaminants, but no structural removal, topsoil placement or revegetation. A small area of bull thistle was observed near the fule storage tanks. The operator must ensure that this infestation is treated and not allowed to spread (since it is located near the topsoil pile, which is sold offsitel. This small area does not yet present a problem in the context of this report. Progress made toward controlling this noxious weed should be reported on the annual report form. The present bond was reviewed in June 1999, with little change to the site since then. The bond is felt to be adequate at this time. The fuel storage area consists of two tanks with about 2200 gallon combined capacity, stably situated in a concrete containment structure. A small amount of soil contamination was observed at the containment area, both at the fueling location (spillage from diesel nozzles) and at the outlet drain at the south end. These areas, though not extensive, do present a future potential for becoming larger if not cleaned up and/or the drainage and fuel handling practices not improved. The condition is not regarded as a problem at this time, but the site may be reinspected at the end of summer 2001 to check for clean up of soils and construction of an impermeable outlet sump. The sump must be adequate but may be of the operator's design. The contaminated soils may either be removed from the site to an approved facility or thinly spread on the process area roads to release the volatiles. Waste fluids or unusable fuels now contained in sumps or vessels must not be spread on the ground, but must be siphoned and removed to an approved facility. These items will be monitored later this season. If not handled, clean up costs will be added to the operator's bond amount and the condition will become a problem. The processing area was active at the time of the inspection, but no mining was occurring in the permit area (due to seasonally high river levelsl. No other items were discussed or observed. There were no problems. All responses or questions about this inspection report should be directed to this inspector at the Division's Durango Field Office. The address is: Division of Minerals and Geology, 701 Camino del Rio, Room 125, Durango, Colorado 81301; telephone 970/247-5193, or fax 970/247-5104. I & E Contact Address cc: Tom Gillis, DMG NAME OPERATOR STREET CITY/STATE/ZIP Dave Dillon Sandco.lnc. PO Box 4440 Durango, CO 81302 ^ CE ^ BL ^ FS ^ HW ^ HMWMD (CH) ^ SE ^ WOCD ICH1 ^ OTHER