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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. 80-056 NPDES NO. CA0004472 WASTE DISCHARGE REQUIREMENTS FOR MC CORMICK AND BAXTER CREOSOTING COMPANY SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (here- after Board), finds that: 1. McCormick and Baxter Creosoting Company (hereafter discharger) submitted a report of waste discharge, dated 15 January 1980, to renew NPDES No. CA0004472. 2. McCormick and Baxter Creosoting Company discharges an average of 0.41 million gallons (18 1/sec) per day of waste cooling water and boiler blowdown into Mormon Slough, tributary to the San Joaquin River, a water of the United States. Discharge 001 consists of a maximum 252,000 gallons (11 1/sec) per day of cool- ing water from a creosoting operation and 2,500 gallons (.1 1/sec) per day of boiler blowdown. Discharge 002 consists of a maximum of 200,000 gallons (9 1/sec) per day of cooling water from a cellon wood treating operation. All discharges are located in the southwest 1/4 of Section 10 (projected), T1N, ME, MDB&M. Domestic sewage and approximately 5,000 gallons (.2 1/sec) per day of log spray runoff water, used to control pentachorophenol bloom, is discharged to the City of Stockton sanitary sewer system for treatment and assimulation at the sewage treatment facilities. 3. McCormick and Baxter Creosoting Company discharges an average of 2,000 gallons (9 1/sec) per month of process wastes and washwater (oily wastes) to holding ponds located on the plant site. Wastewater in the holding ponds is periodically pumped into tank trucks and disposed of at a suitable site. 4. All on-site stormwater is collected and pumped to two lined holding ponds. If acceptable concentration limits established by the City of Stockton are determined, the stormwater is discharged to the city sanitary sewer for treatment at the sewage treatment facility. If concentrations determined are not acceptable, the stormwater is transported via tank truck to suitable Class I dump site. 5. Beneficial uses of Mormon Slough and the San Joaquin River are domestic, municipal, agricultural, and industrial supply; recreation; esthetic enjoy- ment; navigation; and preservation and enhancement of fish, wildlife, and other aquatic resources. 6. The Board, on 25 July 1975, adopted the Water Quality Control Plan for the Sacramento-San Joaquin Delta Basin. The Basin Plan contains water quality objectives for the San Joaquin River. FOM/ap Revised 4/8/80