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INFORMATION SHEET <br /> SHELL OIL COMPANY <br /> STOCKTON BULK FUEL DISTRIBUTION FACILITY <br /> SAN JOAQUIN COUNTY <br /> Shell Oil Company proposes to operate a wastewater collection, treatment, and disposal system at the <br /> Stockton Bulk Fuel Distribution Facility, located on Rough and Ready Island. Wastewater is to be <br /> discharged to the San Joaquin River. The primary wastewater source is from groundwater containing <br /> petroleum hydrocarbons. Additional wastewater sources include storm water runoff from a vapor <br /> recovery unit and a truck load rack area, truck wash water, tank bottoms and cleaning water (from <br /> Stockton and surrounding Shell terminals), and service station water (including tank bottom water, rinse <br /> water, and groundwater from recovery systems at local service stations). <br /> Wastewater will flow through a CPI separator, followed by a 600,000 gallon equalization tank, then be <br /> treated in a fluidized bed biological reactor. Treated wastewater will be stored in a 230,000 gallon tank <br /> for settling of solids and monitoring to determine compliance with this Order prior to the tank contents <br /> being discharged to the San Joaquin River. If, based on results of testing, additional treatment is <br /> required to meet effluent limits, the Discharger has proposed to operate activated carbon adsorption <br /> units or other appropriate treatment units. Storm water runoff from the tank farm area is proposed to <br /> be discharged to the San Joaquin River without treatment, following visual inspection. Analytical <br /> results of a storm water sample showed non-detectable concentrations of benzene, toluene, xylene, ethyl <br /> benzene, and total petroleum hydrocarbons. <br /> Effluent limits have been established as follows: <br /> a. Batch discharge concentrations for TPH, Benzene, Ethylbenzene, Toluene, and Xylene are <br /> established as 'non-detected', that is, less than the detection concentrations for specified, <br /> commonly available analytical technology. The batch discharge concentration for lead is <br /> established at 5 µg/1, one-tenth the MCL for lead. <br /> Effluent monitoring for fuel constituents is required to be completed on each batch of treated <br /> wastewater to assure compliance with effluent limits prior to initiating each discharge period. <br /> If the effluent is not in compliance with effluent limits, the discharger must use activated carbon <br /> or other appropriate treatment units to meet the limits. <br /> b. BOD and suspended solids concentrations are established at 10 mg/l each, because the San <br /> Joaquin River regularly experiences episodes of critically low dissolved oxygen concentrations <br /> (<5 mg/1). Effluent monitoring for these constituents is required to be completed on composite <br /> samples collected over the duration of each batch discharge. <br />