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WASTE DISCHARGE REQAMENTS ORDER NO. 5-00-031 • -11- CITY OF LODI WHITE SLOUGH WATER POLLUTION CONTROL PLANT SAN JOAQUIN COUNTY IT IS HEREBY ORDERED that Order No. 93-030 is rescinded and the City of Lodi, its agents, successors and assigns, in order to meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder, and the provisions of the Clean Water Act and regulations and guidelines adopted thereunder, shall comply with the following: A. Discharge Prohibitions: 1. Discharge of wastewater at a location or in a manner different from that described in the Findings is prohibited. 2. The by-pass or overflow of wastes to surface waters is prohibited, except as allowed by Standard Provision A.13. [See attached "Standard Provisions and Reporting Requirements for Waste Discharge Requirements (NPDES), dated 1 March 1991]". 3. When the dissolved oxygen concentration in Dredger Cut, Bishop Cut, or White Slough falls below 5 mg/1, the discharge of wastes to surface waters is prohibited. The points of compliance for this determination shall be defined as receiving water monitoring locations R-1 and R-2, at a time between 7:00 a.m. and 9:00 a.m. Compliance with this Prohibition in Dredger Cut shall be in accordance with the time schedule in Provision H.2. B. Effluent Limitations (Discharges to Dredger Cut): 1. The effluent shall not exceed the following limits: Monthly Weekly Daily Dail - Constituents Units Average Average Average Maximum Dissolved Oxygen] mar5] , Total Suspended mg/1 202 402 50- Solids lbs/day 1168' 23353 2919' Settleable Solids ml/1 0.1 Oil and Grease mg/1 10 15 lbs/day 584 8 5 Chlorine Residual4 mg/l 0.01 0.0194 lbs/day 0.58 3 1.113 Discharge must meet or exceed 5 mg/l dissolved oxygen. To be ascertained by a flow proportional 24-hour composite sample. 3 Based on an average dry weather flow capacity of 7.0 mgd. 4 Note that the 0.019 mg/l limitation is an hourly average not daily average.