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Popp CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2008-0064 WASTE DISCHARGE REQUIREMENTS FOR BP WEST COAST PRODUCTS ARCO/BP STOCKTON FUEL TERMINAL #40T ENHANCED BIOREMEDIATION PILOT STUDY SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region (hereafter Regional Water Board), finds that: 1. The BP West Coast Products (hereafter Discharger) submitted a Report of Waste Discharge on 30 November 2007 for a sulfate and nitrate injection pilot study for enhanced bioremediation. The Discharger owns the ARCO/BP fuel terminal #40T at 2700 Washington Street in Stockton, Assessor's Parcel Number 145-030-09, at township 1 N, range 6E, section 8, Mount Diablo Base and Meridian. The general location of the facility is shown on Attachment A, which is attached hereto and made part of this Order by reference. 2. On 17 October 2003, the Regional Water Board adopted Waste Discharge Requirements (WDRs) Order No. R5-2003-0164 to regulate a previous sulfate and nitrate injection pilot study, which was completed in September 2004. The results of that pilot study showed that decreases in petroleum hydrocarbon concentrations were observed only near the injection points. Therefore, the Discharger proposed an expanded follow-up pilot study with additional injection points, increased mass of nitrate and sulfate injected, and a tracer to evaluate the rate of transport. On 2 May 2007, the Discharger submitted the Work Plan For Enhanced Bioremediation Pilot Study and on 31 July 2007, submitted supplemental information in the Response to Enhanced Bioremediation Work Plan Comment. 3. The Discharger, along with three other bulk fuel terminal companies on the same parcel, formed the Stockton Terminals Technical Committee (STTC) to address groundwater pollution across the entire parcel. Site groundwater monitoring is performed by the STTC as required by Monitoring and Reporting Program (MRP) No. 5-01-0819. The Discharger will continue to follow this MRP and will also implement the MRP that is part of this Order. The Discharger's site currently has 35 on-site monitoring wells, three on-site wells installed for an In-Situ Stable Oxygen Generation (ISO-GEN) pilot study, and six off-site monitoring wells. 4. There are four identified groundwater bearing zones. A majority of the mass of petroleum hydrocarbon pollution is in the A water bearing zone, which is from about 5 to 20 feet below ground surface. The results of second quarter monitoring conducted in May 2007 showed that groundwater contains total petroleum hydrocarbons (TPH) as gasoline up to 80,000 micrograms per liter (µg/1), TPH as diesel up to 160,000 pg/I, benzene up to 9,400 pg/I, toluene up to