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ORDER NO.R5-2002-0071 <br /> -2- <br /> CALIFORNIA NATURAL PRODUCTS <br /> WASTEWATER TREATMENT FACILITY <br /> SAN JOAQUIN COUNTY <br /> flow rates to the land application areas are 250,000 and 290,000 gpd. However, until <br /> improvements are made to the proposed additional land application areas and the Executive Officer <br /> approves a technical report describing the improvements, the annual average flow to the existing <br /> 17.6 acre land application area shall not exceed 200,000 gpd and the monthly average flow shall <br /> not exceed 240,000 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, one well in the <br /> existing land application area and three wells in the proposed 16.0-acre land application area. <br /> The depth to groundwater is approximately 10 to 15 feet below ground surface and the <br /> groundwater gradient is reportedly to the west-northwest. Higher concentrations of dissolved <br /> solids have been reported in samples collected from the 17.6 acre land application area than in <br /> the proposed 16.0 acre land application area. Further evaluation of groundwater conditions, <br /> including better definition of groundwater quality upgradient of the land application areas is <br /> required to establish background groundwater concentrations and determine if the application of <br /> 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 or phosphoric acid as acidic cleaners. The neutralization <br /> of the acid'eaustic chemicals results in plant macro-nutrients that are more likely to be taken up <br /> by 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:4/26/02 <br /> CAMs Doamenn Myed\OBeien\CNP INPO.doc <br />