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• <br />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-4 <br />Table A-2: "Treatment" Summary, ESR Sloping Plots <br />• <br /> 20" topsoil over 6" mixed zone (2/3 <br /> topsoil, l/3 combusted shale) over loosely Base case pile design; also the profile <br />A dumped ESR combusted shale placed at used in the weighing lysimeter <br /> 25% moisture <br /> Same as above with batch leached ESR Determine if ESR combusted shale can <br />B shale in the mixed wne and batch leached <br />" ~ made into suitable root wne by simple <br /> below mixed <br />ESR shale as the first 4 batch (vat) leaching in the field <br /> zone, over ESR combusted shale <br /> 8" topsoil over 6" mixed wne 2/3 topsoil Determine if minimal topsoil salvage <br />" <br /> 1/3 leached ESR combusted shale <br />over ) can be achieved by <br />~uuement (8 <br />C , <br />4" leached ESR shale <br />over ESR ~'~ batch (vat) leaching ESR <br />" <br /> , <br />combusted combusted shale in a 10 <br />thick synthetic <br /> root medium <br /> 32" topsoil over mixed wne 2/3 topsoil Detemvne if thicker topsoil over spent <br />D 1/3 ESR combusted shale sale would make a significant difference <br /> over Base Case Treatment A <br /> Test a simple fallback design with 24" <br />E 24" topsoil over 4" ESR combusted shale topsoil over an impervious compacted <br /> over 4" concrete slab ESR shale cap, if plant cover is found <br /> in le of in tin infiltration <br />F Full d th (~7 ft) native soil Control cell for com arison <br />The sloping plots were set at an angle of 2.6: 1 which is the steepest that soil veneer could be <br />stable. This slope also allows for an overall pile face slope of 3:1 by constructing 50 foot lifts at 2.6:1 <br />with 20 foot horiziontal benches. <br />The sloping plots were instrmented with neutron probe access tubes and buried TDR probes <br />to measure moisture, thermocouples to measure soil temperature, runoff collection gutters, and with <br />shallow percolate collection at the interface between the soil and the combusted shale. These <br />collection systems allowed quantification of runoff quantity and quality on the various aspects of the <br />prototype pile, (north facing, east facing, and south facing), with various surface treatments (A <br />~~ F) <br />LACHEL FELICE & Associates <br />