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WASTE DISCHARGE REQUIRA...gNTS ORDER NO. GOLDSTONE LAND COMPANY,LLC AND KURT KAUTZ BEAR CREEK WINERY SAN JOAQUIN COUNTY retention capacity, and slow runoff. The portion of the LTU adjacent to, or south of, Pixley Slough is Stockton clay with slow permeability(0.06-0.2 in/hr), moderate water retention capacity, and slow runoff. A portion of Vineyard No. 5 is Hollenbeck silty clay with slow permeability (0.06-0.2 in/hr), high water retention capacity, and slow runoff. 36. The mean annual rainfall is approximately 17.57 inches, and the reference evapotranspiration rate (ETO) for the Lodi vicinity is approximately 50.30 inches. The 100-year return annual total rainfall amount is 31.16 inches. 37. The facility is within the Lower Mokelumne Hydrologic Area(No. 531.20), as depicted on interagency hydrologic maps prepared by the Department of Water Resources in August 1986. SPECIAL CONSIDERATIONS FOR FOOD PROCESSING WASTE 38. Excessive application of food processing wastewater to LTUs can create objectionable odors, soil conditions that are harmful to crops, and degradation of underlying groundwater by overloading the shallow soil profile and causing pollutants (organic carbon, nitrate, dissolved solids, and metals) to percolate below the root zone. When sufficient information becomes available, this Order may be revised to increase or further reduce loading rates as appropriate. If the Discharger is unable to modify its waste stream or application methods such that groundwater quality will not be impacted,lhen the Regional Board would be required to classify the waste as a designated waste and require full containment under Title 27 of the California Code of Regulations (hereafter Title 27). 39. According to Pollution Abatement in the Fruit and Vegetable Industry, published by the United States Environmental Protection Agency(US EPA Publication No. 625/3-77-0007) (hereafter Pollution Abatement), in applying food-processing wastewater to land for biological treatment, the loading of BODS should not exceed 100 lbs/acre-day(average) to prevent development of nuisance conditions. 40. Acidic soil conditions can be detrimental to land treatment system function, and may also cause groundwater degradation. If the buffering capacity of the soil is exceeded and soil pH decreases below 5,naturally occurring metals (including iron and manganese)may dissolve and degrade underlying groundwater. Near neutral pH is also required to maintain adequate active microbial populations in the soil. 41. The RWD states that the expected pH of wastewater from the Discharger's facility is 4 to 6 pH units and that natural buffering capacity of site soils should be adequate to maintain pH within a range that protects groundwater quality. However, shock loadings of acidic or basic waste can interfere with the microorganisms responsible for oxidation of the organic waste constituents; Pollution Abatement recommends that water applied to crops have a pH within 6.4 to 8.4 to protect crops from damage. Therefore, the Discharger must meet wastewater effluent limits for pH. V'.l.Joaquin_Nou15�5uR\ObricnTProln Files\9ev Creek\WORdoc