BACKGROUND

applied for a permit renewal to discharge waste under the National Pollutant Discharge Elimination System (NPDES). Supplemental information to complete filing of the application was received on 17 December 2001 and 12 March 2002. The milk processing facility is no longer operating and there is currently no discharge of wastewater. The Discharger has requested the permit be renewed for potential future operations. 2. The Discharger owns and previously operated the milk processing plant and the treatment and disposal ponds located on Assessor’s Parcel Numbers (APN) 20-16-01 and 20-16-03. The plant is in Section 15, T20N, R3W, MDB&M, as shown on Attachment A, a part of this Order. 3. The Discharger has two waste streams: non-contact cooling water and process wastewater. The process waste stream may contain wastewater from washing equipment. Process wastewater and washwater are treated in aerated ponds and discharged to additional ponds for disposal exclusively by evaporation and percolation. The non-contact cooling water may be discharged to surface waters or to the pond system. Non-contact cooling water is discharged to an aeration box for cooling prior to discharge to Walker Creek, a water of the United States and tributary to Willow Creek, the Colusa Trough, and the Colusa Basin Drain at the point, latitude 39 ° 35 ’ 00 ” and longitude 122º 11 ’ 15”