SITE INFORMATION AND CORRESPONDENCE 1980-1999

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. 5-00- NPDES NO. CA0079243 WASTE DISCHARGE REQUIREMENTS FOR CITY OF LODI WHITE SLOUGH WATER POLLUTION CONTROL PLANT SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region (hereafter Board), finds that: 1. The City of Lodi (hereafter Discharger) submitted a Report of Waste Discharge, dated 19 August 1997, and applied for a permit renewal to discharge waste under the National Pollutant Discharge Elimination System (NPDES) from the White Slough Water Pollution Control Plant. 2. The Discharger operates a wastewater collection, treatment, and disposal system, and provides sewerage service to the City of Lodi. The treatment plant is in Section 23, T3N, R5E, MDB&M, as shown in Attachment A, a part of this Order. Disinfected secondary effluent is discharged to Dredger Cut, thence White Slough and Bishop Cut, waters of the United States, and tributaries to the Sacramento-San Joaquin Delta. The discharge occurs at the point latitude 38°, 05', 35" and longitude 121°, 23', 48". 3. The Report of Waste Discharge and monitoring reports describe the existing domestic wastewater discharge to surface water as follows: Average Flow: 5.6 mgd Design Flow: 8.5 mgd Average Temperature 81 °F Summer, 68 °F Winter Constituent' Concentration BOD 8.4 mg/l (392 lbs/day) Suspended Solids 8.4 mg/l (392 lbs/day) TDS 410 mg/l Cyanide <10 gg/1, (median);49 gg/1, (highest measured) Organochlorine Pesticides 0.01 gg/1, (median)2; 0.051 gg/1 (highest measured) (Lindane) Lead(total recoverable) 1.5 lug/1, (median); 10 µg/1, (highest measured) Mercury(total recoverable) <0.2 lug/1, (median); 0.63 gg/l, (highest measured) Zinc (total recoverable) 110 g9/1, (median); 160 /kg 1, (highest measured)