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r 1 . <br /> Fuel Consumption of RSI <br /> (S)pray (A)eration (v)acuum (E)xtraction <br /> S.A.V.E. Natural Gas & Propane <br /> December 26, 1990 <br /> Assumptions: <br /> 1 S.A.V.E. system is running 100% alternate fuel, no British Thermal Unit (btu) <br /> value from well flow.. Engine speed is approximately 2,000 Rpm. <br /> r <br /> S.A.V.E. runs an average of 21 hours per day, 31 days per month, or 90% efficient. <br /> Natural gas is sold by therms. One therm is equal to 100,000 btu's. <br /> There is approximately 940 btu's per cubic foot, therefore, 106 cubic feet per <br /> therm. <br /> Average cost per therm in southern California for one year is 0.72/therm (see <br /> below) . <br /> S.A.V.E. uses approximately 100 cubic feet of natural gas per hour. <br /> S.A.V.E. uses approximately 1.1 gallons or propane per hours. Propane's price for <br /> this comparison is $ 0.90/gallon. <br /> Natural Gas @ 0.72/therm ProQane @ 0.90 <br /> cfh - fuel 100.00 gph - fuel 1.10 <br /> hours 21.00 hours 21.00 <br /> therms as cf 106.00 <br /> therms/day 19.81 gallons/day 23.10 <br /> days 31.00 days 31.00 <br /> total therms 614.15 total gallons 716.10 <br /> price $ 0.72 price $ 0.90 <br /> total month $ 443.81 total month S 644.49 <br /> average/day S 14.32 average/day $ 20.79 <br /> average/hour $ 0.68 average/hour $ 0.99 <br /> 1All calculations are based upon no btu value from contamination. Experience <br /> shows we can expect btu value from contamination, therefore corresponding decreases <br /> of alternative fuel usage. The amount of btu value to be obtained from the <br /> contamination and the duration of its value is site specific. if a certain <br /> percentage <br />