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L <br />GeoSyntec Consultants <br />Table 3-1 <br />Final Cover Materials, WMU B Partial Final Closure <br />Forward Landfill <br />Note: 'Approximate construction quantities. Actual quantities will be based on final closure design. <br />J:\ALLIED\FORWARD\CLOSUREPLAN\REPORT 3-7 99.11.30 <br />ESTIMATED <br />DESIGN <br />MATERIAL <br />QUANTITIES'' <br />REQUIREMENTS <br />Grass seed mixture <br />18.8 Acres <br />1) Use Forward Landfill Erosion Seed Mix from JDM <br />with overlying <br />Landscaping, Lodi, CA <br />organic layer <br />2) Place 2 -inch thick, shredded green waste (organic) <br />layer to minimize raindrop impact prior to seed <br />ermination <br />Vegetative Layer <br />31,730 yd <br />1) Use on-site silty clayey sands (SM) or (SC) from <br />excavations of future WMUs <br />2) Minimum 85% relative compaction (ASTM D1557) <br />1) Transmissivity of 1x10 m2/s <br />Geocomposite <br />Drainage Layer <br />210,000 ft2 <br />2) Geonet with double -sided, heat bonded, 8 oz/yd 2 non- <br />woven filter geotextiles <br />3) Place beneath vegetative layer on 2H:1V side slopes <br />1) Minimum 30% fines, soil classification of (SC), (CL), <br />Compacted Clay <br />30,350 yd' <br />or (CH) <br />Liner <br />2) Use on-site clay (CL) from excavations of future <br />MUs; or admix on-site clay with 25% imported <br />MARCO clay to meet hydraulic conductivity <br />requirements (if necessary) <br />3) Minimum 90% relative compaction (ASTM D1557) at <br />a water content that will result in a hydraulic <br />conductivity of 1x10-6 cm/s or less <br />4) Construct and test 2er C A Plan <br />Foundation Layer <br />60,700 yd <br />1) Minimum 2 -ft thickness (Per Forward, an approximate <br />1 -ft thick intermediate soil cover is already in place <br />over existing WMU B slopes) <br />2) Clear/grub existing vegetation prior to placing <br />overlying cover components <br />3) Minimum 90% relative com action ASTM D1557) <br />Note: 'Approximate construction quantities. Actual quantities will be based on final closure design. <br />J:\ALLIED\FORWARD\CLOSUREPLAN\REPORT 3-7 99.11.30 <br />