SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

u INFORMATION SHEET 6_ CITY OF STOCKTON REGIONAL WATER QUALITY CONTROL PLANT SAN JOAQUIN COUNTY This Order requires the frequency of testing to be 4 times per quarter, four quarters per year. This frequency is reasonable, as other discharge with similar discharge flows, and more available dilution conduct tests at this frequency. The effluent discharge is typically started and shut down several times over the course of a month. The chronic toxicity test requires that test water be renewed several times over the course of the test. In order to ensure the test can be completed in the event of a plant shutdown, this Order requires that sufficient renewal water be collected at the beginning of the test and at each renewal. Receiving Water Monitoring The previous permit required receiving water monitoring to be conducted daily during the low flow season, and at two river depths at most stations. Since the river model has become available, the frequency of receiving water monitoring can be decreased. This Order requires the receiving water to be monitored twice weekly during the summer and fall, and weekly during the rest of the year. The time for twice weekly sampling coresponds to the period when dissolved oxygen excursions are most likely. Also, all samples are now collected only at mid-depth. Sludge Disposal The City has been contracting with a company to have sludge hauled off-site to a land application site. The contract is for the sludge which is currently being generated. The City also has stockpiles of sludge, both on-site and at the Port of Stockton, which need to be disposed. This Order requires the Discharger to submit a sludge disposal plan, in accordance with the Monitoring and Reporting Program, for the currently-generated sludge and the stockpiled sludge. Water Reclamation The Discharger previously was allowed to temporarily supply chlorinated secondary treated wastewater for specific reclamation purposes, including dust control and compaction by building contractors, street sweeping, and use in a local cement batch plant to mix cement, in accordance with Resolution 77-69 for Emergency Use of Reclaimed Water. This permit allows the reclamation uses to be continued on a permanent basis. Reclamation specifications are included to protect public health and receiving water beneficial uses. The Requirements include effluent monitoring of reclaimed water. A provision has been included to allow additional specific reclamation uses can be approved by the Executive Officer. Storm Water