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TABLE 1 Monitoring and Reporting Program No. R5-2013-XXXX ST SERVICES, L.L.0 AND NUSTAR ENERGY L.P. 2941 NAVY DRIVE, STOCKTON, SAN JOAQUIN COUNTY Constituents Depth to TPHg TPHd BTEX MTBE5 TBA5 TAME DIPE5 ETBES Ethanols Methanols EPA Method Water 8015M 8015M 020 or 8260 8260B 8260B 8260B 8260B 8260B 8260B 82608 Maximum Practical Quantitation Limit' 50 50 0.5 0.5 5 0.5 0.5 0.5 50 100 SamL)Iina FreclunCY2 Well Annually' PS/WC-4M x x x OW-6D x x x x OW-7A x OW-7B x OW-7C x OW-7D x PS/WC-3M x x x x x x PS/WC-3S x x x x x x ST/WC-1A x ST/WC-1 B x ' If the maximum practical quantitation limit is exceeded for a non-detectable result,the Discharger shall provide an explanation in the report text.All concentrations between the Method Detection Limit and the Practical Quantitation Limit shall be reported as trace. 2 All wells shall be monitored semiannually for water levels and the presences and thickness of free product.Groundwater level measurements for all Stockton Terminals Technical Committee and ST Services,LLC monitoring wells shall be collected on the same day and all groundwater monitoring samples shall be collected during the same week. 3 Wells shall be sampled semi-annually during the first and third quarters. °Wells shall be sampled annually during the third quarter. 5 Fuel oxygenates,includeing MTBE,TBA,TAME,di-isopropyl ether(DIPE),ethyl tertiary butyl ether(ETBE),ethanol,and methanol shall be analyzed in all monitoring wells during two monitoring events in the first and third quarters at the practical quantitation limit shown in the table. If results are nondetectable for fuel oxygenates for both sampling events,no further monitoring for oxygenates is required in that well. If a fuel oxygenate is detected, it shall be added to the monitoring program for the well in which it was detected. Monitoring wells that have already eliminated fuel oxygenate monitoring based on previous MRP requirements do not need to be resampled for fuel oxygenates.