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TABLE 1 ' GROUNDWATER TREATMENT SYSTEM FLOW DATA Speedy Foods 8200 N Hwy 99, Stockton, California (Page 4 of 5) Meter Period Cumulative Measured Period Date Reading Flow Flow Flow Rate Flow Rate Comments (gallons) (gallons) (gallons) (gpm) (mgd) Air stripper auto shutoff during visit due to high limit switch in 12/20/04 182845 8960 527844 2 1 2 9 E-3 stripper sump effluent pump not working Shut stripper and extraction wells off and call for repair Finished wetting carbon in new unit Air stripper bypassed to treat water through carbon units only until 12/21/04 182845 0 527844 - - stripper repaired Extraction halted due to high backpressure through new carbon unit 12/23/04 1 182856 11 527855 - - Remove effluent pump and run system through carbon units 12/28/04 203732 20876 548731 16 4 2 E-3 12/30/04 209974 6242 554973 09 3 1 E-3 Flow reduced due to clogged filter and carbon unit backpressure replaced filter 01/03/05 225025 15051 570024 06 38 E-3 Backpressure in carbon unit 01/07/05 232246 7221 577245 04 1 8 E-3 Backpressure in carbon unit 01/10/05 235154 2908 580153 04 97 E-4 Very high backpressure in carbon unit System shut down for maintenance 01/18/05 235154 0 580153 - _ Replaced effluent pump and restarted air stripper and treatment system 01/21/05 238017 2863 583016 - 1 4 E-3 System down upon arrival water filter clogged Replaced water filters and re-started system 4105 251509 13492 596508 3 1 4 5 E-3 Sampled EFF C2, C1,AS1 INF 01/28/05 262715 11206 607714 05 2 8 E-3 Clogged water filter greatly reduced flow Replaced water filters and re-started system 02/01/05 278387 15672 623386 07 3 9 E-3 Clogged water filter greatly reduced flow Replaced water filter with 50 micron filters Re-started system 02/04/05 286294 7907 631293 35 2 6 E-3 Scaling noted on interior of fittings may be restricting flow High limit fault on system cycling too frequently Clean out leaves 02/07/05 292323 6029 637322 46 2 0 E-3 in system and repair leaky valves Call contractor for assessment System shut down 02/08/05 292323 0 637322 _ _ Contractor assessment and adjustments to interlocks Re-start system 02/09/05 298550 6227 643549 40 6 2 E-3 02/11/05 308057 9507 653056 40 411 E-3 02/15/05 329230 21173 674229 38 5 3 E-3 02/17/05 333830 4600 678829 - 23 E-3 Backpressure in carbon unit seems to limit flow 02/18/05 336325 2495 681324 - 25 E-3 High limit fault on no water moving through system due to backpressure Shutdown system for troubleshooting 02/24/05 336325 0 681324 _ _ Troubleshoot system backpressure due to scaling in carbon unit C2 Temporarily bypass C2 pending acid wash treatment 02/25/05 342946 6621 687945 46 6 6 E-3 Sampled INF, EFF,AS1 02/28/05 356103 13157 701102 38 4 4 E-3 03/05/05 375104 19001 720103 40 3 8 E-3 03/08/05 391513 16409 736512 40 5 5 E-3 System shut down to begin acid wash of air stripper and carbon unit C2 03/09/05 391513 0 736512 - - System re-started after acid wash treatment of carbon unit Appears that backpressure builds in system and ultimately outflow 1105 405517 14004 750516 60 7 0 E-3 pump from air stripper cannot move water Pressure released and system allowed to operate High limit fault on in holding tank and in air stripper Built up back 03/15/05 427191 21674 772190 60 5 4 E-3 pressure in carbon unit apparently restricts flow and needs to be released periodically