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Z P <br /> Table 1 <br /> PREDICTED PERFORMANCE OF SOIL VAPOR EXTRACTION AND AIR SPARGE WELLS <br /> Ruiz Grocery Store <br /> 4491 West Durham Ferry Road <br /> Tracy,California <br /> Soil Vapor Extraction Wells <br /> Well Flow @ 30"w.c. Flow @ 50"w.c. TPHg vapors 02 L.E.L. Radius of Infleunce <br /> I.D. (cfm) (cfm) ( mv) M (%) (feet) <br /> RW-1 15 25 27,000 3.7 30 35 <br /> VW-1 30 55 9,000 1.0 17 17 <br /> VW-2 8 13 50,000 3.1 29 29 <br /> VW-3 3 8 30,000 -- -- -20 <br /> PVW-4 •-10 --18 --5,000 -- -- -20 <br /> MW-1 •-10 •-18 •-5,000 -- -- -20 <br /> MW-2 -15 -25 --30,000 -- -- _20 <br /> PHVW-1* up to-250 up to-250 up to 30,000 -- -15 <br /> Total/Average** -90 -160 14,000 2.6 25 -- <br /> TPHg Recovery(lbs/day) -338 •-600 -- __ <br /> Air S12arge Wells <br /> Well Flow @ 3 psi Flow Q 7 psi <br /> I.D. (cfm) (cfm) <br /> SW-1 10 13 <br /> SW-2 -10 -13 <br /> Notes: <br /> cfm: Cubic feet per minute <br /> psi: Pounds per square inch <br /> TPHg vapors: Total hydrocarbons as gasoline detected in vapor sample collected during pilot testing <br /> ppmv: Parts per million by volume <br /> lbs/day: Hydrocarbon recovery in pounds per day based on <br /> indicated flow and assumed TPHg concentration of 14,000 ppmv <br /> 02: Percent oxygen measured in soil vapor during pilot testing <br /> L.E.L. Percent lower explosive limit measured in soil vapor during pilot testing <br /> Estimated from pilot test data <br /> --• Data not available <br /> Horizontal vapor extration well to operate solo during high water table(i.e.<12 feet bgs) <br /> ** Indicates expected total flows and average concentration at start-up using vertical wells <br /> TPHg Recovery: Indicates expected hydrocarbon recovery rate at start-up, <br /> it is expected that this rate will decrease with time <br /> Page 1 of 1 I <br /> II � <br />