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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION 3201 "S" Street Sacramento, California 95816 FACT SHEET APPLICATION FOR WASTE DISCHARGE REQUIREMENTS TO DISCHARGE TO STATE WATERS BY SIMPSON PAPER COMPANY, RIPON MILL STOCKTON STREET, P. 0. BOX 757 RIPON, CALIFORNIA 95366 ORDER NO. NPDES NO. CA0004006 The Simpson Paper Company (owned by Simpson Timber Company, Seattle, Washington) operates a paper mill located within the city limits of Ripon, San Joaquin County. The Ripon Mill is a non-integrated paper mill which manufactures several grades of fine papers from purchased pulp. The annual average production is 100 tons of paper per day during approximately 331 operating days per year. Existing Waste Discharge Requirements are contained in Board Order No. 73-173 (NPDES No. CA0004006) which was adopted on 23 February 1973 and which will expire on 31 December 1977. The Simpson Paper Company, Ripon Mill submitted a Report of Waste Discharge dated 27 June 1977 as application for reissuance of waste discharge requirements. The Ripon Mill proposes to discharge treated wastewaters to either the Stanislaus River or to Company owned property for irrigation and disposal. On any given day, either discharge may vary from zero to 1.8 mgd. The expected annual average dis- charges are 0.5 mgd to the Stanislaus River and 1.1 mgd for irrigation of approxi- mately 60 acres of land. An additional 30 acres of land is available for emergency disposal purposes. Prior to jully 1974 Ripon �L ll diScharo � o theStan, �9 tt�� r� _tee t� cla=fig River rOP_fiintiOLSly, or intermittently. Since July 1975, they have been able to contain all wastewater on land. The Simpson Paper Company expects to resume intermittent discharges to the river by January 1978, after new treatment facilities, including aeration equip- ment, have been installed and only when all waste discharge requirements can be satisfied. The proposed Waste Discharge Requirements reflect the more stringent of: the effluent limitations promulgated by the Environmental Protection Agency (40 EFR Part 430 Subpart R, NI Fine Papers Subcatagory) representing application of best practicable control technology currently available; the existing effluent limita- tions contained in Order 73-173; the description of effluent quality contained in the Report of Waste Discharge submitted by the discharger; and Grater quality ob- jectives contained in the Water Quality Control Plan for the San Joaquin and San Joaquin-Sacramento Delta Basins.