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f <br /> i <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> ORDER NO.97-229 <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR <br /> J. R SIlvfPLOT COMPANY <br /> STORMWATER SURFACE IMPOUNDMENT <br /> AND <br /> CLASS II SURFACE R\4POUNDMENTS <br /> SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board), finds <br /> that: <br /> 1. J. R Simplot Company (hereafter Discharger) submitted a Report of Waste Discharge dated <br /> 14 March 1997, to request modification of waste discharge requirements to allow stormwater <br /> runoff from a specific area that formerly discharged to lined surface impoundments, to be <br /> discharged instead to the unlined stormwater evaporation/percolation basin. The area proposed for <br /> the change used to contain hazardous materials storage tanks with secondary containment and a <br /> perimeter roadway. The storage tanks have been closed under RCRA and the site capped with <br /> asphalt. No processing, hazardous or liquid wastes/materials are stored in the area in question. The <br /> only materials that are stored.ia this area are double-bagged product and some'dismantled <br /> equipment. Modification to the.existing requirements consists solely of allowing the new discharge <br /> to the.stormwater impoundment and making reference to improvements that have occurred since <br /> adoption of the current requirements. <br /> 2. The WMUs are currently regulated by Waste Discharge Requirements Order No. 96-221 which <br /> included the requirement to complete the retrofit of three surface impoundments to conform to v <br /> California Code of Regulations (CCR), Division 3, Chapter 15 (hereafter Chapter 15) requirements <br /> for Class H surface impoundments. [Since adoption of Order No. 96-221, CCR, Title 27, Division <br /> 2, Subdivision I(hereafter Title 27)was promulgated, supplanting and including the requirements of <br /> C4pter 15] I time'schedule for construction of the retrofits of the three impoundments was - <br /> included in the previous version of waste discharge requirements, Order No. 94-189. Two of the <br /> impoundments were retrofitted on-schedule prior to the adoption of Order No. 96-221. The <br /> Discharger completed the retrofit on schedule under Order No. 96-221. <br /> 3. Order No.96-221 also regulated the stormwater surface impoundment which is designed as an <br /> evaporation/percolation basin.. Over time, fines have accumulated in the stormwater impoundment <br /> diminishing its ability to percolate and capacity for stormwater.runoff. Order No. 96-221 modified <br /> requirements to allow the Discharger to reclaim wastewater in the stormwater impoundment by <br /> placing it on cropland owned by the Discharger. The requirements allow the reclamation to occur <br /> after approval of a reclamation plan approved by the Executive Officer. Reclaimed water will be <br /> required to be maintained on the reclamatioa`fields. Application of the wastewater in the <br /> stormwater pond to cropland is an appropriate use of the water and will not pose an additional <br />