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detailed slurry wall construction plan and detailed QA/QC program are received and approved <br />by the Division. <br />Conceptual Slurry Wall Construction Plan <br />The following Conceptual Slurry Wall Construction Plan is based on a paper by C.R. Ryan and <br />S.R. Day, Titled "Soil-Bentonite Slurry Wall Specification", Geo-Solutions Inc., Pan American <br />Conference on Soil Mechanics and Geotechnical Engineering, Geo-Institute and MIT, <br />Cambridge , MA, June 2003. <br />1. Slurry Parameters <br />Slurry Test Methods; <br />The following field testing methods will be preformed according to ASTM specifications <br />and at a frequency as recommended in the Divisions guide titled "Guide to Specification <br />Preparation for Slurry Walls and Clay Liners as a Component of a Colorado Mined Land <br />Reclamation Permit": <br />• Viscosity-Marsh Funnel <br />• Unit Weight -Mud Balance <br />• Filter Press <br />• Sand Content <br />Slurry Properties When Freshly Mixed: <br />• The Viscosity-Marsh Funnel test will be performed to determine the properties of <br />the freshly mixed slurry as to viscosity. Viscosity is related to bentonite type, content <br />and degree of hydration. Unless otherwise indicated, the Applicant/4perator will <br />specify the use of "standard" 90 barrel yield bentonite as specified in API Publication <br />13A, Section 5. <br />• The addition of dry bentonite to the back fill will range from 0% to 3% as dictated <br />by site-specific design considerations. <br />• Only water of suitable quality will be used to mix with the slurry. <br />• The mixed bentonite slurry will be completely hydrated prior to placement. <br />In-trench Slurry Properties: <br />