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McCORMICK AND BAXTER CREOSOTING COMPANY SAN JOAQUIN COUNTY 9. The Board in a public meeting heard and considered all comments pertaining to the discharge. 10. This Order shall serve as a National Pollutant Discharge Elimination System permit pursuant to Section 402 of the Federal Water Pollution Control Act, or amendments thereto, and shall take effect ten days from the date of hearing provided the Regional Administrator has no objections. IT IS HEREBY ORDERED, McCormick and Baxter Creosoting Company, in order to meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder and the provisions of the Federal Water Pollution Control Act and regulations and guidelines adopted thereunder, shall comply with the following: A. Effluent Limitations, Discharge 001: 1. The discharge shall not contain constituents in excess of the following limits: 30-Day Daily Constituents Units Average Maximum Arsenic mg/l 0.05 0.1 lbs/day 0.1 0.2 Copper mg/l 0.05 0.1 lbs/day 0.1 0.2 Phenols mg/l -- 0.01 lbs/day -- 0.02 Oil and Grease mg/l -- 10. lbs/day -- 21. 2. The discharge shall not have a pH less than 6.5 nor greater than 8.5. 3. The maximum daily dry weather discharge shall not exceed 255,000 gallons. 4. The discharger shall use the best practicable cost effective control technique currently available to limit mineralization to no more than a reasonable increment. 5. The maximum temperature of the discharge shall not exceed the ambient temper- ature of Mormon Slough by more than 20°F. 6. The discharge shall not contain toxic materials in concentrations detrimental to human, plant, animal, bird, or fish life. B. Effluent Limitations, Discharge 002: 1. The discharge shall not contain constituents in excess of the following limits: ` - 2 -