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<br />Logan Wash Mine Annual Report <br />Permit No.: M-1977-424 <br />weekly measurements of flow, pH, specific conductivity, temperature, oxidation-reduction <br />potential (ORP), and dissolved oxygen. One analytical sampling was conducted on October 2, <br />2002 of retort water to support water treatment system design and performance. A sampling of <br />SRB Cell influent and effluent was conducted on February 6, 2003. The results have not yet been <br />submitted by the analytical laboratory. <br />4.0 Construction of Pilot Passive Water Treatment System <br />WWL submitted Technical Revision No. 3 (TR-3) on October 22, 2002, and the DMG approved <br />the revision on November 27, 2002. The technical revision involved the construction of a pilot- <br />passive-water-treatment system near the toe of the lower mine dump on OSSI property. <br />According to DMG, the revision had an estimated liability of $2,245, and was added to the <br />existing liability amount of $264,000. <br />The purpose of the pilot treatment system is to test the ability of natural organic media to reduce <br />concentrations of sulfate, metals, and other constituents in the retort water. It is hypothesized that <br />sulfate-reducing bacteria will cause a reduction in sulfate (to sulfide) and/or the metabolization of <br />metals. Related processes include metals adsorption, absorption, and precipitation. <br />The pilot treatment system involved the excavation of a small pit and subsequent partial burial of <br />a 1,700-gallon polyethylene tank adjacent to the buried retort-water drain pipeline. The tank was <br />filled with a mixture of saw dust, wood chips, alfalfa, and steer manure. Several valves were <br />installed to divert a portion of the retort water to the tank. Water flows into the bottom of the <br />tank and upwards through the bio-media, discharging near the top of the tank through a pipe back <br />to the retort drain line. Valves have been appropriately placed for sampling and monitoring of <br />water quality. GSHI is currently monitoring water quality and flow in the SRB Cell on a weekly <br />basis. <br />No new ground disturbance was made during construction of the pilot passive treatment system <br />as the system was constructed on previously disturbed land below the toe of the lower dump. <br />5.0 Reclamation Activities in 2002 <br />No surface reclamation activities have been conducted at the Logan Wash Mine site since the <br />mid-1980's, and G5HI did not conduct surface reclamation activities at the Logan Wash Mine <br />Site during the current reporting period. Several other activities related to mine closure were <br />conducted as described in Section 6.0 below. <br />6.0 Maintenance Activities <br />Maintenance activities included periodic inspections of mine roads, portals, underground drainage <br />systems associated with the retorts and general mine workings, and evaporation pond security and <br />leak detection system. Maintenance activities conducted at the mine and Pond tare summarized <br />in the Following sections. <br />Western Water & land, Inc. 3 of 5 <br />OMGLWann103.doe <br />3/6/2003 <br />