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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. R5-2003-XXXX FOR AGRIUM INCORPORATED AND WESTERN FARM SERVICE, VERNALIS FACILITY SAN JOAQUIN COUNTY Western Farm Service (WFS) has been the operator of a retail agricultural chemical business at 35100 South Highway 33 in Vernalis since the site was developed in 1969. In 1993, WFS became a wholly owned subsidiary of Agrium Incorporated (collectively Discharger). Groundwater occurs at about 30 feet below ground surface and contains nitrogen, fumigants, and pesticides. This pollution impaired the beneficial use of this water resource. In 2002, the Discharger implemented a pilot study application of Hydrogen Releasing Compound® in groundwater to evaluate its remedial potential. 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 nitrate, ammonium, 1,2-dichloropropane, 1,2,3-trichloropropane, and diuron, emanating from the property and resulting from the Discharger's past operation. 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 revised MRP No. 97-808,which was issued on 3 March 1999. Prior to construction of any new groundwater monitoring or extraction wells, and prior to abandonment " of any 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 groundwater monitoring program and shall be sampled and analyzed according to the schedule below. This MRP includes a schedule for pilot scale remediation monitoring as shown in the Remediation Monitoring Table. GROUNDWATER MONITORING y As shown on Figure 1, there are five groundwater monitoring wells: MW-1, MW-2, MW-3, MW-4, and MW-5. The groundwater monitoring program for the five monitoring wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule below. Sample collection and analysis shall follow standard EPA protocol.