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ExxonMobil Global Services <br />Colony Shale Oil Project <br />ESR Reclamation Studies <br />• Weighing Lysimeter Performance 1990-2003 <br />Project No. 353 <br />Page A-3 <br /> Various revegetation studies showed that 2 ft <br />Reclamation wne thickness 2 ft soil layer over would be adequate to sustain plants, may not <br />and composition 6" "mixed zone" cut off all infiltration past root wne, but will <br /> minimise it. Site studies at Colony indicated <br /> 2 ft of hi er a soil is available. <br /> Mix of grasses, <br /> <br />Plant specres shmbs, and forts <br />' Seeding with native plant species, augment <br /> similaz to Colony <br />s later if necessazy with containerized stock. <br /> 'tted mix <br /> Fall seeding hay Techniques successfully used in reclamation <br />Planting technique <br />fertilize <br />mulch in Rocky Mountain west, similaz to <br />' <br /> , rocedures in Colon <br />s MLRB nnit. <br />A.2 ESR Plots Layout and Purpose of Each Component <br />• The test plots consisted of a series of three 6-cell sloping plots, a long east-facing runoff plot, <br />several sacrificial "mini-plots " in extractable 55 gallon drums, and the weighing lysimeter. These <br />were selected considering the "concephial" design described above as the base case, with variations <br />aimed at specific questions. The selected site was in a valley south of the Colony Plant Site, with <br />slopes in the three major prototype pile directions (north facing, south facing and east facing). The <br />fourth aspect, west facing, was considered to be similaz to an east facing slope. The site of the plots <br />was selected at about Elevation 7800 feet to approximate the average elevation of the prototype pile <br />(E17500 to E18100 feet). <br />The 6-cell sloping plots were installed flush with the natural hillsides on three key aspects, <br />north facing (wettest environment), south facing (driest environment) and east facing (intermediate <br />moisture, and largest surface area of prototype spent shale pile). The six profiles or "treatments" are <br />as follows: <br />• <br />LACHEL FELICE & Associates <br />