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<br />~ <br /> <br />TABLE 2.9 <br /> <br />Technology Summary - Modified In-Situ Retorting <br />with Surface Retorting <br /> <br />General <br />Technology Description - Modified in-situ retorting with surface <br />retorting of the mined oil shale; external heat surface retorting; H2S <br />removal and refining of kerogen. <br />Sector Mnemonic - TISR <br />Prime Source - N. M. Stefano, et. aI, Modified In-Situ Oil Shale Plant <br />(Redondo Beach, California: TRW Systems, revised July 1974). <br /> <br />Physical Features <br />Output - 50,000 bbl/cd (combined mined <br />Yield Ratios - in-situ D 65% of Fisher <br />combustion and 100% for TOSCO <br />Shale Grade - 18 gal/ton ore assay <br />Overburden - 1,300 ft. <br />Formation Thickness - 450 ft. <br /> <br />and surface retorting) <br />assay; s~face = 90% for gas <br />/I <br /> <br />./ <br /> <br />Financial Features <br />Capital Cost - $311.809 x 106 (1974 dollars)l <br />Annual Operating Cost - $158.725 x 106 (1974 dollars)l <br />Cost Range - $8.35/barrel (1974 dollars) <br /> <br />Notes <br />- <br /> <br />Other facts on surface retorting - <br />Surface retorting is 27% of plants output using 35,000 tons/day of <br />oil shale. <br />Surface retorting requires 30% of plants capitol costs, but only 18% <br />of the operating costs. <br /> <br />1 Data based upon the financial and accounting conventions of this <br />report. <br />