SITE INFORMATION AND CORRESPONDENCE_2001-2018

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2005-0810 CALIFORNIA WATER CODE SECTION 13267 FOR SHELL OIL PRODUCTS US,BULK FUEL TERMINAL STOCKTON, SAN JOAQUIN COUNTY Shell Oil Products US (Discharger) owns and operates a bulk fuel terminal at 3515 Navy Drive on the northeastern portion of Rough and Ready Island at the Port of Stockton(site). Facility operations began in 1940 and have resulted in petroleum hydrocarbon pollution of soil and groundwater. This pollution impaired the beneficial uses of this water resource. Groundwater is first encountered at about 10 feet below ground surface. Local groundwater flow is generally to the west-southwest. The Discharger has historically operated a soil vapor extraction(SVE) system and a groundwater extraction and treatment (GWET) system. The Discharger no longer operates the SVE system but has continued to operate the GWET system. 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 and diesel, benzene, toluene, ethylbenzene, xylenes, methyl tertiary butyl ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (RIPE), ethyl tertiary butyl ether(ETBE), tertiary amyl methyl ether(TAME), ethanol and methanol, emanating from the property under the control of the Discharger. 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. 5-01-815, which was issued on 28 March 2001. 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 35 shallow zone monitoring wells and one deep zone monitoring well. The groundwater monitoring program for the 36 monitoring wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule below. If sampling requirements for elimination of constituents have been met under the previous MRP, the Discharger is not required to sample for those constituents again based on the new requirements. Monitoring wells with free phase petroleum product or visible sheen shall be monitored, at a minimum, for product thickness and depth to water. The volume of extracted groundwater also shall be provided in monitoring reports. Sample collection and analysis shall follow standard EPA protocol.