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spills. It is expected that during the first several weeks of operation, and because of potential <br />freezing conditions, the pilot system will be visited on a daily basis. The frequency of monitoring <br />will be reduced to a weekly schedule as flow reaches an acceptable equilibrium. Sampling and <br />analysis will be conducted to evaluate system effectiveness in treating the retort water. Analytes <br />to be evaluated initially include ammonia, boron, fluoride, sulfate, nitrate, dissolved metals <br />(arsenic, iron, mercury, selenium) and BTEX. Total or total recoverable analyses will be <br />conducted for arsenic, mercury, and "von. Total dissolved solids and general cations and anions <br />will be also be analyzed. <br />6.0 Reclamation Cost Estimate <br />The estimated cost of reclaiming the pilot treatment system is approximately $2,245. This <br />estimate includes the following itemized costs: <br />Disposal of liner, bioreactor media, and aggregate in mine and/or at evaporation <br />pond (haul equipment and labor): $325 <br />2. Backfilling, grading, and reseeding of pilot treatment excavation and disturbance: <br />Backfilling, grading subcontract: $1,200 <br />Oversight Labor: $520 <br />Seeding: $200 <br />The cost estimate includes mobilization and demobilization of a large backhoe and small dump <br />truck, labor in extracting the SRB cell (tank) and liner materials, and transport to the lower mine <br />portal or the evaporation pond area. The biomass material would be drained and transported to <br />the lower mine portal or the evaporation pond area and allowed to decompose in place. <br />Alternativelg should the passive pilot system prove effective, the biomass material at the pilot <br />system could be transported to the site of a full-scale passive system that would be constructed on <br />the mine site. <br />7.0 Schedule <br />The proposed actions will be implemented in the fall of 2002 and operated into the summer of <br />2003. GSHI is prepazed to begin construction of the pilot treatment system as soon as possible, <br />pending approval by the CDMG. The pilot treatment system will be monitored through the <br />