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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> ORDER NO. <br /> WASTE DISCHARGE REQUIREMENTS <br /> FOR <br /> SIMPSON PAPER COMPANY AND <br /> SIMPSON LEE PAPER COMPANY <br /> RIPON MILL <br /> SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, <br /> (hereafter Board) finds that: <br /> 1 . Simpson Paper Company and Simpson Lee Paper Company, Ripon Mill D <br /> (hereafter Discharger) submitted a Report of Waste Discharge, dated <br /> 31 July 1987, to discharge waste under the National Pollutant Discharge <br /> Elimination System. The Discharger has not discharged any wastewater to <br /> the Stanislaus River in the past seventeen years and no longer proposes 1 C <br /> to discharge to the Stanislaus River in the future. Therefore, NPDES <br /> Permit No. CA0004006, which expired on 1 February 1988, will not be <br /> renewed. The Discharger proposes the continued discharge of wastewater <br /> to on-site ponds and agricultural fields. <br /> 2. The Discharger operates a paper mill in Section 29, T2S, RBE, MDB&M (see 0 <br /> Attachment A which is hereby made part of this Order) . The Discharger <br /> discharges a maximum 1.8 mgd (78.9 1/sec) of combined treated industrial <br /> wastewater and stormwater runoff to 90 of 228 acres owned by Simpson Lee <br /> Paper Company (APN No. 259-340-01 and 259-340-02) for disposal and <br /> irrigation. Domestic waste is sewered to the City of Ripon wastewater <br /> treatment facilities. <br /> 3. The Discharger manufactures several grades of fine papers from purchased <br /> pulp. The mill ' s maximum daily production rate is 187,000 lbs of paper. <br /> Process water is added to blocks of pulp to make a slurry which is made <br /> into paper. Dyes, starch, and alum are used in the process. The water <br /> that drains from the paper is recycled to be used in the slurry. The <br /> holding tank is dumped when colors are changed, 2 to 3 times per day. <br /> Flow from this process is approximately 900,000 gallons per day (gpd) . <br /> 4. Brine from a water softener and the mill effluent are discharged to a <br /> circular primary clarifier. The clarifier effluent is discharged to two <br /> 5-ft deep ponds in series (Pond 1 and Pond 2) . Pond 3 contains overflow <br /> from Pond 2 and is usually dry. Effluent from the second pond is <br /> disposed of on-site to two percolation fields, approximately 20 acres <br /> each. Pond effluent is discharged to one field for ten days, and then <br /> to the other for ten days. During the summer, effluent is also used to <br /> irrigate a 60 acre on-site walnut orchard. Clarifier sludge is <br /> discharged to an on-site sludge pond. <br />