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TENTATIVE WASTE DISCHARGE REQUIREMENTS ORDER NO._ -5- <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR CLOSURE, POST CLOSURE AND CORRECTIVE ACTION OF SURFACE <br /> IMPOUNDMENTS AT KRUGER FOODS, INC-SMS BRINERS VEGETABLE BRINING <br /> FACILITY SAN JOAQUIN COUNTY <br /> GROUNDWATER CONDITIONS <br /> 22. The designated beneficial uses of the groundwater, as specified in the Basin Plan, are <br /> domestic and municipal water supply, agricultural supply; industrial service supply and <br /> industrial process supply. <br /> 23. Groundwater beneath the site is monitored in two zones. The shallow zone groundwater is <br /> unconfined. During various monitoring events, it was encountered between 99.72 (MW3A - <br /> 4/17/02)to 125.96 ("A" shallow— 10/24/97) feet below ground surface. The elevations of <br /> the potentiometric surface ranges from—46.55 feet msl to—22.58 feet msl and fluctuates <br /> seasonally as much as 15 feet. The deep zone has been defined as semi-confined. Elevation <br /> of the deep zone fluctuates from—47.28 feet msl(P6)to—21.25 feet msl (P4). <br /> 24. In April 2003, groundwater flow in the shallow zone was to the northwest. During the same <br /> period, groundwater flow in the deep zone was also to the northwest. The average <br /> groundwater gradient was approximately 0.002 to 0.01 ft/ft in the summer and 0.0006 to <br /> 0.0009 ft/ft in the fall. The Discharger has calculated the velocity of groundwater in the <br /> shallow and deep zones to be 2.7 x 10'5 cm/sec and 5.0 x 10-4 cm/sec, respectively. <br /> Water Quality Protection Standard <br /> 25. The Water Quality Protection Standard,that have been calculated by the Discharger, are: <br /> Water Quality Protection Standard <br /> Constituent Shallow Zone Deep Zone <br /> Qv W2) (MW3B) <br /> IDS 600 mg/1 460 mg/l <br /> Chloride 89 mg/1 27 mg/1 <br /> Groundwater Monitoring <br /> 26. The existing ground water monitoring system consists of monitoring wells and production <br /> wells used for monitoring. Monitoring wells.are identified as MW-1,MW-2,MW-3A, MW- <br /> 3B, MW-4A, and MW-4B. Production wells are identified as A,B, D and E. Wells MW-1, <br /> MW-2, MW-3A and MW-4A monitor shallow zones of the Upper Laguna Formation,while <br /> MW-3B and MW-4B monitor deeper zones of the Upper Laguna Formation(see Attachment <br /> C). <br /> 27. The Discharger's detection monitoring program for groundwater does not satisfy the <br /> requirements contained in section 20405 of Title 27. At this facility, groundwater flow has <br /> historically changed due to seasonal variations as well as the pumping of groundwater in the <br />