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5.3 Pood Maintenance Maintenance of Pond I included weekly inspection of (1) drainage rates [o the pond from the mine retorts, (2) the leak detection vault, and (3) general liner and pond condition. GSHI periodically uses an enhanced evaporation system at the pond consisting of a gasoline motor, pump, headers, and 8-sprayers. The system waz not operated during 2000. 5.4 Closure Sampling In accordance with the Proposed Retort Closure Plan (DMG letter to GSHI on Oct. 25, 1999), Well LWCW-lA (installed in January 1999) and the clean (non-retort) mine-water discharge pipe were sampled 4 times during the repotting period (a total of 6 sampling events to dale). The Plan specifies the well and mine water discharge to be sampled 8 times over 5 quarters. Once data from these sampling events are used to establish AIPLs, an alternate sampling schedule will be established for the remainder of [he closure monitoring period. This alternate schedule will probably be modified to accommodate construction and performance of the planned passive water treatment system. 6.0 Reclamation io the Year 2001 GSHI will conduct revegetation work (reseeding) on the estimated 0.14 acre that waz disturbed along the access road to the evaporation pond. This disturbance was associated with repair activities on Ote retort discharge pipeline. Occidental Oil Shale, Inc. and GSHI are in the process of reviewing reclamation specifications for the Logan Wash Mine site; however, the schedule for the work has not been finalized. Therefore, GSHI will notify DMG az soon az possible regarding its intent to begin site reclamation and removal Crom Temporary Cessation status. 7.0 Anticipated Disturbance io the Year 2001 GSHI will commence with the design, field testing, and installation of a passive water treatment system at Logan Wash Mine in the year 200 L It is anticipated that the system will function by way of bioreactions within natural organic media (compost. woodchips, steer manure, etc.). Once field testing is completed, the most effective and appropriate media will be selected and used in the final treatment design. A technical revision under the current mine permit will be prepared and submitted to DMG for approval of the passive water treatment system. Upon being granted approval Crom the DMG and the Colorado Department of Public Health and Environment, GSHI will begin construction of the system. [t is anticipated that the passive water treatment system will generally consist of an on-site detention basin tilled with the bioreacting material. The size of the basin is yet to be determined; however, it is anticipated that construction of the entire system may disturb up to 2 aaes.