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WASTE DISCHARGE REQUIREM&S ORDER NO.5-01-251 0 7 <br /> CITY OF LATHROP AND CROSSROADS CREA LLC <br /> WASTEWATER TREATMENT PLANT NO. 1 (CROSSROADS), SAN JOAQUIN COUNTY <br /> impact on water quality will be substantially less. Degradation of groundwater by constituents (e.g., <br /> toxic chemicals) other than those specified in the groundwater limitations in this Order, and by <br /> constituents that can be effectively removed by conventional treatment (e.g.,total coliform bacteria) is <br /> prohibited. When allowed, the degree of degradation permitted depends upon many factors (i.e., <br /> background water quality, the waste constituent, the beneficial uses and most stringent water quality <br /> objective, source control measures, waste constituent treatability). <br /> 38. Economic prosperity of local communities and associated industry is of maximum benefit to the <br /> people of California, and therefore sufficient reason exists to accommodate growth and groundwater <br /> degradation around the wastewater treatment plant, provided that the terms of the Basin Plan are met. <br /> 39. These waste discharge requirements do not allow degradation of groundwater beneath the land <br /> application areas. The Discharger is required to monitor the groundwater under the land application <br /> areas and if the monitoring data indicate that the discharge of waste to the land application areas is <br /> causing groundwater to contain waste constituents in concentrations statistically greater than <br /> background water quality, then the Discharger may be required to submit a report to indicate how such <br /> degradation will comply with Resolution 68-16. Upon review of such report, the Board may revise <br /> this Order, including the groundwater limitations. <br /> Treatment and Control Practices <br /> 40. This wastewater treatment facility provides treatment and control of the discharge that incorporates: <br /> a. Technology for secondary treatment of municipal wastewater; <br /> b. Recycling of wastewater on cropped properties; <br /> c. An industrial discharge ordinance; <br /> d. An operation and maintenance (O&M)manual; and <br /> e. Staffing to assure proper operation and maintenance. <br /> 41. The facility treats wastewater to secondary standards and will install lined treatment and storage <br /> ponds. Because of the shallow water table, there is minimal potential for constituent attenuation in <br /> the vadose zone. In addition,the potential impacts on groundwater and the appropriate level of <br /> degradation that complies with Resolution 68-16 have not been fully evaluated. Therefore, the <br /> Discharger's current effort may not constitute BPTC as intended in Resolution 68-16, and this Order <br /> establishes a schedule for tasks to evaluate BPTC for each conveyance,treatment, storage, and <br /> disposal component of the facility and to further characterize groundwater for selected constituents. <br /> Completion of these tasks, and implementation of the approved strategies developed from that work, <br /> will ensure that BPTC and the highest water quality consistent with the maximum benefit to the <br /> people of the State will be achieved. <br /> 42. This Order establishes interim groundwater limitations for the W WTF that will not unreasonably <br /> threaten present and anticipated beneficial uses or result in groundwater quality that exceeds water <br /> quality objectives set forth in the Basin Plan. This Order contains tasks for assuring that BPTC and <br /> the highest water quality consistent with the maximum benefit to the people of the State will be <br /> achieved. Accordingly, the discharge is consistent with the antidegradation provisions of <br />