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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5- CALIFORNIA WATER CODE SECTION 13267 FOR ST SERVICES, L.L.C. AND NUSTAR ENERGY L.P. BULK FUEL TERMINAL #29 STOCKTON, SAN JOAQUIN COUNTY The ST Services, L.L.C, a subsidiary of NuStar Energy L.P. (hereafter jointly referred to as Discharger) owns the bulk fuel terminal at 2941 Navy Drive at the Port of Stockton (site). Operations at the terminal resulted in petroleum hydrocarbon pollution of soil and groundwater. This pollution impaired the beneficial use of this water resource. First encountered groundwater fluctuates seasonally between about two to 10 feet below ground surface. There are four identified groundwater bearing zones at the site. Local groundwater flow is to the east-southeast. This Monitoring and Reporting Program (MRP) is issued pursuant to Section 13267 of the California Water Code and is necessary to delineate groundwater pollutant plumes and determine whether remediation efforts are effective. Existing data and information about the site show the presence of various chemicals, including total petroleum hydrocarbons (TPH) as gasoline, TPH as diesel, benzene, toluene, ethylbenzene, xylenes, methyl tertiary butyl ether (MTBE), tertiary butyl alcohol (TBA), and tertiary amyl methyl ether (TAME) emanating from the property due to the Discharger's past operations. The Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. This MRP replaces the requirements listed in MRP No. R5-2004-0822, which was issued on 6 May 2004 and is hereby rescinded. Prior to construction of any new groundwater monitoring or extraction wells, and prior to destruction of any groundwater monitoring or extraction wells, the Discharger shall submit plans and specifications to the Regional Board for review and approval. Once installed, all new wells shall be added to the monitoring program and shall be sampled and analyzed according to the schedule below. GROUNDWATER MONITORING As shown on Figure 1 , there are 34 monitoring wells. Wells PS/P-10, PS/P-23, ST/WC- 1A, ST/WC-1 B, ST/WC-1 C, and UP/MW-3 are monitored for depth to groundwater only. The groundwater monitoring program for the other 28 monitoring wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule below. Monitoring wells with free phase petroleum product or visible sheen shall be monitored, at a minimum, for product thickness and depth to water. Sample collection and analysis shall follow standard EPA protocol.