SITE INFORMATION AND CORRESPONDENCE_CASE 2

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2007- WASTE DISCHARGE REQUIREMENTS FOR CITY OF TRACY AND LEPRINO FOODS COMPANY LAND DISCHARGE UNITS OF THE TRACY WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY ITI The California Regional Water Quality Control Board, Central Valley Region, (hereafter Regional Water Board) finds that: 1. The City of Tracy Wastewater Treatment Plant (hereafter Facility) treats primarily domestic Z wastewater collected via the City of Tracy's wastewater collection system. The Facility also accepts industrial food processing wastewater through a segregated collection system from Leprino Foods Company (Leprino), a local cheese manufacturer. Leprino operates pretreatment ponds at the Facility to treat its industrial food processing wastewater prior to discharge to the City of Tracy's industrial holding ponds. The industrial wastewater is held in the ponds prior to final treatment at the main treatment plant. After treatment, all wastewater is discharged to Old River, under a separate NPDES permit. 2. The City of Tracy submitted a Report of Waste Discharge (ROWD) on 1 November 2000, D to update its NPDES permit. Subsequently, on 3 February 2003, the Discharger submitted a modified ROWD, which included a request to increase the discharge from 9.0 million gallons per day (mgd) to 16 mgd. Because the discharge of waste may impact groundwater at the site, the Facility will be regulated by separate waste discharge requirements (WDRs) in addition to the NPDES permit. 3. These WDRs regulate the industrial pretreatment ponds, industrial holding ponds, sludge drying beds, and biosolids storage areas of the Facility. The remainder of the Facility is regulated under Order No. R5-2007- (NPDES No. CA0079154), not incorporated by reference herein. 4. The close proximity of the City of Tracy's and Leprino's waste units makes it difficult to distinguish between any infiltration to groundwater from the facilities operated by the City of Tracy and from those operated by Leprino. Therefore, this Order refers to the City of C Tracy and Leprino Foods Company individually and/or jointly as "Discharger." Leprino is solely responsible for discharges from its segregated industrial pipeline and the treatment units it operates at the Facility. The City of Tracy is the owner of the Facility and is responsible for all discharges from the Facility, including the discharges from the Leprino- rn operated treatment units. Background 5. The City of Tracy Wastewater Treatment Plant is located north of Interstate 205 on the northern edge of the City of Tracy in San Joaquin County in Section 16, T1 S, RSE, MDB&M, as shown in Attachment A, which is attached hereto and made part of this Order by reference.