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MONITORING AND REPORTING PROGRAM NO. R5-2008-0064 -2- 8P WEST COAST PRODUCTS ARCO/BP STOCKTON TERMINAL#40T ENHANCED BIOREMEDIATION PILOT STUDY SAN JOAQUIN COUNTY Constituents EPA Method Maximum Quantitation Limit Frequency Methyl Tertiary Butyl Ether 8260B 0.5 pg/I B Tertiary Butyl Alcohol 8260B 5 pg/I B Ferrous Iron (dissolved) SM 3500FeD 0.1 mg/L C Sulfide 376.2 0.1 mg/L C Nitrate (as NO3)and Sulfate 300.0 1 mg/L C Nitrite 300.0 1 mg/L C Total Nitrogen 4500-N 0.1 mg/L C Sodium 6010-13 or 200.7 1 mg/L C Ammonium (as NH3) 350.1 0.5 mg/L C Potassium 200.7 1 mg/L C Total Alkalinity 310.1 or SM2320B 5.0 mg/L C Total Hardness 130.2 1 mg/L C Total Dissolved Solids 160.1 or SM2540C 10 mg/L C Total Phosphorus and o-phosphate 300 0.15 mg/L C 1 For nondetectable results. A Every time a well is sampled. B Monthly while injection is occurring and quarterly after injection has ceased. C After injection,weekly during the first month of injection, monthly for the first six months after initiation of injection,and quarterly thereafter. mg/I Milligrams per liter µg/I Micrograms per liter B. FIELD MEASURED PARAMETERS Monitoring of the bioremediation pilot study shall include field measured parameters recorded from downgradient wells AR/MW-1 A, AR/MW-3A, AR/MW-5A, AR/MW-5B, AR/MW-5C, AR/MW-50, AR/MW-8A, AR/MW-8B, AR/MW-8C, AR/MW-10A, AR/MW-11A, AR/MW-12A, AR/MW-13A, AR/MW-13B, AR/MW-13C, AR/MW-23A, AR/MW-24A and upgradient well PS-P29 every time these wells are sampled. The field measured parameters to be recorded are listed in the following table. Constituents Units Electrical conductivity pmhos/cm PH pH units Oxidation-reduction potential millivolts Dissolved oxygen mg/L Bromide mg/L Temperature °F/°C Groundwater elevation Feet and hundredths, mean sea level Field testing instruments (such as those used to test oxidation-reduction potential and dissolved oxygen) may be used provided that: 1. The operator is trained in proper use and maintenance of the instruments;