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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0064 g BP WEST COAST PRODUCTS ARCO/BP STOCKTON TERMINAL#40T ENHANCED BIOREMEDIATION PILOT STUDY SAN JOAQUIN COUNTY California pursuant to California Business and Professions Code sections 6735, 7835, and 7835.1. As required by these laws, completed technical reports must bear the signature(s) and seal(s) of the registered professional(s) in a manner such that all work can be clearly attributed to the professional responsible for the work. a. The Discharger shall submit a Pilot Study Implementation Report due no later than 60 days after startup of the enhanced bioremediation pilot study. The Pilot Study Implementation Report shall include a description of the injection system and results of the first month of operation including analytical results. b. If the Discharger proposes a second three-month injection period, the Discharger shall submit an Evaluation Report at least 30 days before the proposed injection. The Evaluation Report shall include analytical results to show the fate and transport of the initial sulfate/nitrate/phosphate injection and proposed injection details including volume, rate, and concentration for the second injection. c. The Discharger shall submit a Pilot Study Evaluation Report no later than one year after the final injection ends, which shall include a summary of analytical results, an evaluation of injection effectiveness, and discussion of feasibility for full-scale remediation. 5. If groundwater samples from monitoring well AR/MW-1A are 20 percent or more above baseline concentrations of nitrate, sulfate, nitrogen, sodium, ammonium, sulfide, phosphate, and/or phosphorous, the Discharger shall immediately notify Regional Water Board staff of the exceedance(s) and obtain a confirmation sample within 7 days of receiving the results. Within 48 hours of receiving the confirmation sample results, the Discharger shall notify Regional Water Board staff of the results followed by written notification within 7 days. 6. Within 30 days of confirming that baseline concentrations have been exceeded by 20 percent or more in monitoring well AR/MW-1A, the Discharger shall cease the injections and continue monthly monitoring of well AR/MW-1A for three months to generate enough data to establish a trend. If the levels, based on the concentration trend, are 20 percent or more above baseline levels, the Discharger will install a groundwater extraction and treatment system and begin extraction of groundwater from extraction wells AR/MW-13A, AR/MW-3A, and AR/MW-8A, treat the extracted groundwater, and discharge the treated water to the sanitary sewer or haul it off-site for disposal. The Discharger will also monitor well AR/MW-1A every other week until the levels decrease to baseline levels and then monthly for at least six