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Longfellow Koehler Project <br /> Page 5 <br /> (7) Conceptual plan for replacement of the passive bio treatment mass. <br /> Passive Bio Treatment Design Criteria(cont.) <br /> (8) Character of spent material. <br /> (9) Designed to operate with the simplest and least frequent operation and maintenance <br /> requirements. <br /> (10) Climate and access. <br /> Work Plan Schedule <br /> 1996 <br /> (1) Evaluate baseline water quantity and quality at M-2,portals and other seeps. <br /> (2) Collect and bench scale test for passive bio treatment systems. <br /> (3) Open portals for evaluation of discharge conditions. <br /> (4) Determine quantity and quality to be treated by passive bio treatment system. <br /> (5) Examine surface subsidences for run on control. <br /> (6) Design run on control practices. <br /> (7) Design lined flow around ditches. <br /> (8) Design passive bio treatment system. <br /> (9) Investigate favorable location for onsite relocation of mine wastes. <br /> (10) Record historical buildings and artifacts that will be affected by this project. <br /> (11) Obtain permits, if needed, from San Juan County and Corps of Engineers. <br /> (12) Install downstream sedimentation controls to prevent pollution during reclamation. <br /> (13) Start and complete as much of the onsite mine waste mitigation work as possible. <br />