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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0220 -5- TEICHERT AGGREGATES TRACY ROCK PLANT SAN JOAQUIN COUNTY Basin Plan,Beneficial Uses, and Regulatory Considerations 33. The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, Fourth Edition, (hereafter Basin Plan) designates beneficial uses, establishes water quality objectives, contains implementation plans and policies for protecting waters of the basin, and incorporates by reference plans and policies adopted by the State Board. Pursuant to Section 13263(a) of the California Water Code,waste discharge requirements must implement the Basin Plan. 34. Surface water drainage is to the Sacramento-San Joaquin Delta. The beneficial uses of the Delta are municipal and domestic supply; irrigation and stock watering;process and service supply; contact and non-contact recreation; warm and cold freshwater habitat; warm and cold water migration; warmwater spawning habitat; wildlife habitat and navigation. 35. The beneficial uses of underlying groundwater are municipal, industrial, and agricultural supply. 36. State Water Resources Control Board (State Board)Resolution No. 68-16 prohibits degradation of groundwater quality unless it has been shown that: a. The degradation is consistent with the maximum benefit to the people of the State b. The degradation will not unreasonably affect present and anticipated future beneficial uses; C. The degradation does not cause exceedance of one or more water quality objectives; and d. The discharger employs best practicable treatment and control to minimize degradation. The Regional Board has considered antidegradation pursuant to State Board Resolution No. 68-16, and finds that the Discharger has not provided the required demonstration to be allowed to cause groundwater degradation, and therefore none is authorized. 37. Because no chemicals are used in processing the aggregate, the land disposal of wastewater as proposed should not degrade groundwater quality. Therefore, it is appropriate not to require groundwater monitoring at this time. If staff determines that the discharge has caused, or has the potential to cause, groundwater degradation, then the Discharger will be required to monitor groundwater quality, cease the discharge, change the method of disposal, and/or take other actions as necessary to comply with Resolution No. 68-16. 38. Section 13267(b) of California Water Code states that: "In conducting an investigation specified in subdivision (a), the regional board may require that any person who has discharged, discharges, or is suspected of discharging, or who proposes to discharge within its region, or any citizen or domiciliary, or political agency or entity of this state who has discharged, discharges, or is suspected of discharging, or who proposes to discharge waste outside of its region that could affect the quality of the waters of the state within its region shall furnish, under penalty of perjury, technical or monitoring program reports which the