SITE INFORMATION AND CORRESPONDENCE_CASE 2

Home Browse Search

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. SPECIAL ORDER FOR CITY OF TRACY MODIFYING WASTE DISCHARGE REQUIREMENTS (NPDES PERMIT) AND CEASE AND DESIST ORDER TO RELAX SUSPENDED SOLIDS LIMITS The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds: 1 . Discharge from the City of Tracy Wastewater Treatment Facility (hereafter City) is governed by the following Orders adopted by the Board: 77-182 (CA0079154) Waste discharge requirements and NPDES permit. 78-52 Cease and Desist Order with wet industry ban. 79-54 Cease and Desist Order, time schedule, and interim BOD and SS limits. 79-123 Amendment to Order 78-52 allowing a wet industry connection. 80-097 Amendment to Order 77-182 prescribing p •etreat- ment standards. 2. The City has requested a relaxation of the monthly average total suspended matter (TSM) effluent limitation from 20 mg/l to 30 mg/l . 3. The principal reason for the original adoption of the 20 mg/l TSM limit was to assure a high level of protection for a proposed Old River State Park near the discharge point. Plans for that park have been dropped. 4. The increase in effluent TSM from 20 mg/l to 30 mg/l is not expected to adversely affect the solids or turbidity levels in Old River since the river exceeds that level nine months out of the year. The other three months are high-flow months when adequate dilution is available. 5. The City expects to realize substantial cost savings in plant operations as a result of the relaxation. 6. A review of self-monitoring reports submitted by the City indicates the bases for the Cease and Desist Orders still exist (i .e. , the City violates or threatens to violate various prescribed effluent limits, including the relaxed TSM limit) .