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INFORMATION SHEET <br /> SHELL OIL COMPANY <br /> STOCKTON BULK FUEL DISTRIBUTION FACILITY <br /> SAN JOAQUIN COUNTY <br /> C. Compounds containing nitrogen are added in the batch treatment process to enhance removal of <br /> fuel constituents. Although there is no effluent limit for total nitrogen or ammonia, there is a <br /> requirement that there be no acute toxicity in undiluted effluent. Testing each batch for acute <br /> toxicity prior to initiating the discharge is required in order to prevent any toxicity problems <br /> from ammonia. Effluent and receiving water monitoring for ammonia is required to assess <br /> actual discharged concentrations and its impact on the receiving water. <br /> The receiving water limit for dissolved oxygen has been set at 6.0 mg/1, from 1 September to 30 <br /> November, and at 5.0 mg/1 for the rest of the year in order to implement water quality objectives <br /> contained in the Water Quality Control Plan for Salinity, San Francisco Bay/San Joaquin Delta Estuary. <br /> The permit contains effluent and receiving water temperature limitations which are contained in the <br /> Thermal Plan. <br /> Although the discharge may be as high as 230,000 gpd when the discharge is occurring, the discharge <br /> will only occur up to two times per month, so it is considered to be low volume for purposes of <br /> compliance with the Inland Surface Waters Plan and Enclosed Bays and Estuaries Plan. Because it is <br /> a low volume discharge, the Discharger is not required to characterize the discharge for the constituents <br /> contained in Tables 1 and 2 of the Inland Surface Waters Plan. For those constituents regulated by the <br /> Plans, effluent limitations provide adequate protection of water quality, and compliance with numerical <br /> water quality objectives. Chronic toxicity monitoring is not proposed because the discharge will be low <br /> volume and intermittent. The San Joaquin River is expected to provide considerable dilution. <br />