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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD
<br /> CENTRAL VALLEY REGION
<br /> MONITORING AND REPORTING PROGRAM NO. R5-2007-0811
<br /> FOR
<br /> LEPRINO FOODS COMPANY
<br /> SAN JOAQUIN COUNTY
<br /> The Leprino Foods Company (Discharger) owns and operates a food processing facility
<br /> at 2401 MacArthur Drive in Tracy. The site includes an area south of the facility
<br /> formerly known as the Mobil Bulk Oil Plant (Mobil), which the Discharger purchased in
<br /> 1998. The groundwater monitoring network at Leprino Foods Company includes
<br /> monitoring wells on the Mobil site. Groundwater, at a depth of about 10 feet below
<br /> ground surface (bgs), and overlying soil are polluted with total petroleum hydrocarbons
<br /> (TPH) due to a historical release from an aboveground tank. This pollution impaired the
<br /> beneficial uses of this water resource. The Discharger has installed a groundwater
<br /> extraction and treatment system to control groundwater gradient and recover petroleum
<br /> hydrocarbons, and is evaluating additional methods to accelerate decomposition of the
<br /> pollutants.
<br /> This Monitoring and Reporting Program (MRP) is issued pursuant to Section 13267 of
<br /> the California Water Code and is necessary to delineate groundwater pollutant plumes
<br /> and determine whether remediation efforts are effective. Existing data and information
<br /> about the site show the presence of various chemicals, including TPH emanating from
<br /> the property under control of the Discharger. The Discharger shall not implement any
<br /> changes to this MRP unless and until a revised MRP is issued by the Executive Officer.
<br /> This MRP replaces the groundwater monitoring requirements listed in the
<br /> MRP No. 5-2003-0808, which was issued on 20 February 2003.
<br /> Prior to construction of any new groundwater monitoring or extraction wells, and prior to
<br /> abandonment of any groundwater monitoring or extraction wells, the Discharger shall
<br /> submit plans and specifications to the Board for review and approval. Once installed,
<br /> all new wells shall be added to the monitoring program and shall be monitored,
<br /> sampled, and/or analyzed in accordance with the schedule below.
<br /> GROUNDWATER MONITORING
<br /> As shown on Figure 1, there are 22 monitoring wells at the Site designated MW-2,
<br /> MW-3, MW-4, MW-5, MW-6, MW-7, MW-8, MW-9, MW-10, MW-11, MW-14A, MW-16,
<br /> MW-17, MW-18, MW-19, RW-1, RW-2, RW-3, RW-4A, RW-5A, RW-6, and RW-7.
<br /> Monitoring wells MW-3, MW-4, RW-6 and RW-7 are fitted with product skimming
<br /> pumps. Wells MW-2, MW-8, MW-9, MW-10, MW-16, RW-3, and RW-5A shall be
<br /> monitored for groundwater levels only. Monitoring wells MW-13, MW-14, and MW-15
<br /> were abandoned in 2000 due to plant expansion. There are also two extraction wells,
<br /> designated EW-2 and EW-3, which were connected to the groundwater extraction
<br /> system in 2002 and 2005, respectively, to provide hydraulic control of the groundwater
<br /> plume.
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