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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2002-0806 FOR CHEVRON PRODUCTS COMPANY BANTA BULK FUEL TERMINAL BANTA, SAN JOAQUIN COUNTY Chevron Products Company(Discharger) owns and operates a bulk fuel terminal at 22888 South Kasson Road in Banta(site). The active fuel terminal has nine aboveground fuel storage tanks, ' tank-truck loading racks, above and below ground piping, an office building, and other structures used for storage. Depth to first encountered groundwater is about six feet below ground surface. There are two water bearing zones identified as A and B. The A water bearing zone is divided into the upper A zone(UA) and the lower A zone (A). The groundwater is polluted with both separate and dissolved phase petroleum hydrocarbons. ' 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 shows the ' presence of various chemicals, including total petroleum hydrocarbons,benzene, toluene, ethylbenzene, xylenes, methyl tertiary butyl ether, and tertiary amyl methyl ether 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 10 MRP replaces the requirements listed in MRP No. 94-811, which was issued on 15 July 1994. Prior to construction of any new groundwater monitoring or extraction wells, the Discharger shall submit plans and specifications to the 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 36 monitoring wells, one water supply well, six ISO-GEN remediation wells, and nine ISO-GEN monitoring wells. The groundwater monitoring program ' for the 36 monitoring wells, one water supply well, and any wells installed subsequent to the issuance of this MRP, shall follow the schedule in Table 1 (attached). Monitoring wells with free phase petroleum product or visible sheen shall be monitored for product thickness and depth to water only. Sample collection and analysis shall follow standard EPA protocol. REPORTING When reporting data, the Discharger shall arrange the information in tabular form so that the date, the constituents, and the concentrations are readily discernible. The data shall be summarized in such a manner as to illustrate clearly the compliance with this Order. In addition, 0 the Discharger shall notify the Bdard within 48 hours of any unscheduled shutdown of any soil vapor and/or groundwater extraction system.