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s -~.{ ~`k (Page 2) MINE ID f OR PROSPECTING .ID f M-80-244 INSPECTION DATE 10-30-94 INSPECTOR'S INITIALS ACS OBSERVATIONS A monitoring inspection of Phase 1 leach pad construction was conducted. The geomembrane contractors were installing VLDPE in the process plant to leach pad tie-in location in the morning. Terry Handziak verified that nuclear density testa had been conducted on the soil liner in this area prior to deployment since freezing temperaEuree had occurred the previous night. The soil liner fill had been placed and compacted to form berme that would direct any spills from the process plant down into the pad. Geomembrane was being run up onto the building foundation and extrusion welded to the liner that had been incorporated into the concrete floor of the process plant. Deployment, seaming and testing of geomembrane was observed until the crew broke for lunch. Since it began snowing in the early afternoon, the geomembrane crew did not re-mobilize this day. The lower anchor trench on the south side of the pad was inspected. Geomembrane above the lower anchor trench has been cut in a number of locations, and pulled back away from the trench. Considerable re-conditioning and thickness verification of soil liner will be required in this location, as well as some large VLDPE patches and long extrusion welds. The haul road constructed on drain cover fill on the south aide of the pad was inspected for its entire length. The area of road where lees than the minimum 5' of fill ie in place, ae noted on previous reports, had not yet been built up to grade. Colder was apprised of this fact. It was agreed that the. road would be brought to grade before any truck traffic was allowed. The Division recommends that this be done immediately, because if any trucks are observed on the road prior to repairs, the operator will be noticed for a possible violation. The road was found to be built to grade for the remainder of its length. Ames Construction was placing leak collection fill in the same manner as described in the previous days inspection report. The leak collection riser pipe alignment had been covered by Ames; the riser pipes had not yet been installed. The contractor had covered the alignment to gain access to the face of the toe berm. Ae a result, the alignment will have to be trenched to the liner in order to install the pipes. This operation will involve hand shovelling in~order to avoid damaging the liner. This operation must be closely observed by QA personnel, and will be an inspection topic for the Division. I reviewed the design for the lay-out' of 4" perforated pipes at the base of the leak collection fill. There are no pipes on the face of the toe dam. Due to the steepness of the dam face, and the short elope length, pipes would not particularly facilitate flow to the leak collection sump. Pipes on the other elopes are approximately perpendicular to the slope, and drain to collection pipes located in the groins between changes in slope aspect. The collection pipes are then routed to the leak collection sump. The leak collection pipes are held in place prior to burial using sand bags. It was observed that in a location near the leak collection sump, a number of sand bags were buried under leak collection fill. Terry Handziak stated that he would once again instruct the contractor that all sand bags must be removed. I have subsequently learned that the bags observed to be buried were dug up and removed (per Berhan Keffelew, 10/31/94). M Fill placement in the Highway 67 relocation area was observed. Oversize material was being pushed to the side by a CAT D10 to be broken up using the E120 Excavator with a hammer attachment. The fill was from reduction to grade on Hill No. 1. The topsoil pile located adjacent to the Bateman trailer pit (just below the Carlton Mill) was inspected. Grading and storm water controls below the pile were found to be adequate. All topsoil piles should be seeded before winter. Geomembrane storage west of the process plant was inspected. Rolla were stacked no more than two high ae required by the specifications. cc: Berhan Keffelew Carl Mount I & E Contact Addreee ~ CE NAHE John Hardaway ~ BL OPERATOR Cripple Creek & Victor Gold Co. ~ FS STREET P.O. Box 191 ~ HW CITY/STATE/ZIP Victor, Ca 80860 ~ HMWMD (CH)