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Ik k WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0225 ALPINE PACKING COMPANY,INC. 7 WASTEWATER TREATMENT SYSTEM, SAN JOAQUIN COUNTY 40.1 Monitoring data collected since January 2001 indicates an average total Kjeldahl nitrogen � g l concentration.of approximately 27 mg/l, nitrate has not been detected in the facility wastewater. Using the average flow rate of 33,600 gpd to the land application area, the nitrogen loading rate is `1 approximately 2001bs/ac•year. The loading rate is within the range of typical crop uptake capacity. 41. The wastewater contains Fixed Dissolved Solids (FDS) concentrations of up to 1,670 mg/l; TDS in the background groundwater ranged from 290-485 mg/l in two sampling events. The groundwater monitoring data shows that the Discharger may have degraded the groundwater with salt; however, a better definition of background groundwater quality is needed. i 42. The water balance contained in the RWD indicated the land treatment units are insufficient to accommodate the current wastewater flow and design seasonal precipitation for a 100-year return period for the waste water application areas. This rde r' s revisions require the p q Discharger to evaluate the long-term adequacy of the land treatment units and the need for wastewater storage ponds. In the interim, the Discharger is required to develop a contingency plan, in the event that the land treatment units cannot hold all the wastewater and stormwater produced by a 100-year annual precipitation event. BASIN PLAN, BENEFICIAL USES, AND REGULATORY CONSIDERATIONS 43. 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 Water Resources Control Board. Pursuant to §13263(a) of the California Water Code, waste discharge requirements must implement the Basin Plan. 44. Surface water drainage in the area of the site is to Mosher Slough, which is tributary to the f` Sacramento San Joaquin Delta. 45. ,The beneficial uses of the Sacramento San Joaquin Delta are municipal and domestic supply, agricultural irrigation, stock watering, industrial process, industrial service supply, contact recreation, other noncontact recreation, warm fresh water habitat, cold fresh water habitat, warm water migration, cold water migration, warm water spawning, wildlife habitat, and navigation. 46. The beneficialluses of underlying groundwater are municipal and domestic water supply, agricultural supply, industrial service supply, and industrial process supply. 47. The Basin Plan establishes numeric and narrative water quality objectives for surface and :groundwater within the basin. Numeric water quality objectives are limits already quantified. Narrative water quality objectives are unquantified limits expressing the level of protection for beneficial uses from specific constituents and categories of constituents. Objectives for chemical constituents, toxicity, and tastes and odors of substances in groundwater take both forms. The toxicity objective requires that groundwater be maintained free of toxic substances in concentrations that produce detrimental physiological responses in humans,plants, or animals. The E fl . �