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ORDER NO. R5-2003-0141 • '-2- <br /> CALIFORNIA NATURAL PRODUCTS <br /> WASTEWATER TREATMENT FACILITY <br /> SAN JOAQUIN COUNTY <br /> annual average flow to the existing land areas shall not exceed 250,000 gpd and the monthly <br /> average flow shall not exceed 290,000 gpd. <br /> Groundwater at the 17.6 acre land application area has been monitored by groundwater <br /> monitoring wells since 1988. Additional monitoring wells were installed in 2001 and 2002; two <br /> wells were installed in the existing 17.6 acre (to be reconfigured to 10.1 acre) land application <br /> area and three wells in the 16.0 acre land application area. The depth to groundwater is <br /> approximately 10 to 15 feet below ground surface and the groundwater gradient is reportedly to <br /> the west-northwest. Higher concentrations of dissolved solids have been reported in samples <br /> collected from the 17.6 acre land application area than in the proposed 16.0 acre land application <br /> area. Further evaluation of groundwater conditions, including better definition of groundwater <br /> quality upgradient of the land application areas is required to establish background groundwater <br /> concentrations and determine if the application of wastewater has impacted groundwater quality. <br /> The Discharger installed a reverse osmosis for the boiler feed water. The RO unit replaced <br /> regenerative water softening equipment. In addition, the Discharger uses potassium hydroxide as <br /> a caustic cleaning chemical and nitric/phosphoric acid as acidic cleaners. The neutralization of <br /> the acid caustic chemicals results in plant macro-nutrients that are more likely to be taken up by <br /> cropping activities rather than percolate to groundwater. <br /> These waste discharge requirements contain hydraulic,organic, and nutrient loading limits for the <br /> land application areas, a time schedule for preparation of an Operation and Maintenance Plan, a <br /> reporting requirement for completion of improvements to the land application areas, installation <br /> of additional groundwater monitoring wells, a groundwater quality evaluation, and if needed <br /> based on the results of additional groundwater characterization, a salinity reduction study. <br /> TRO: 8/6/2003 <br />