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Table 2-Performance Data-May 3,2000 <br /> Tosco(Former B ton No 11194 <br /> 2375 Tracy oulevard <br /> Tracy,California <br /> Elapsed MW-5 AMW-b AMW-4 Notes <br /> Time m Depth to Depth to Depth to <br /> Minutes Groundwater Groundwater Groundwater <br /> 50'to AMW-5 52'to AMW-5 89'to AMW-5 <br /> 14'to UST slab 20'to UST slab 36'to UST slab <br /> 0 465 471 458 Start pumping groundwater from AMW-5 <br /> 5 465 472 458 Groundwater drawn down until AMW-5 is dry <br /> 10 465 471 460 <br /> 15 465 472 460 <br /> 20 465 472 460 <br /> 25 466 47t 460 <br /> 30 466 470 460 <br /> 40 465 471 460 <br /> 50 466 471 459 <br /> 60 467 471 460 <br /> 70 467 471 460 <br /> 80 467 471 460 <br /> 90 467 471 460 Stop pumping after 90 minutes-—250 gallons removed <br /> 91 No Drawdown No Drawdown No Drawdown <br /> 94 - <br /> 101 - - <br /> 110 -- - - Start pumping on OBS-W conductor casing <br /> 115 - - <br /> 120 - <br /> 130 - -- Conductor casing OBS-W pumped dry-12'depth <br /> 140 - -- <br /> 150 -- -- - <br /> 160 475 - <br /> 170 -- -- -- <br /> 180 479 471 469 3hours total timeno minutes with conductor casing drawd <br /> 0 12'drawdown No drawdown 0 09'drawdown 4,000 gallons removed in 180 minutes <br /> in 70 minutes in 70 minutes in 70 minutes <br /> Notes <br /> Depth to groundwater measured from top of casing <br /> -=not measured <br /> Page 2 <br />