Laserfiche WebLink
California Regional Water Quality Control Board <br /> April 14, 2000 <br /> Page 2 <br /> activate an alarm to call out staff after hours. The dose analyzer has both high and <br /> low set points established. The residual analyzer only has the high alarm set point. <br /> The low set point cannot be initiated at this time due to the current method of <br /> measuring downstream for fifteen minutes each hour. This would trigger an alarm <br /> every hour. It is our belief that this current method offers adequate protection, as it <br /> will alert us should chorine residual levels exceed the capacity of our dechlorination <br /> system. As we are required by our new permit to establish a continuous monitoring <br /> system to track-dechlorination, it is our intent to make modifications, which will alert <br /> us if chlorine residual is detected in the effluent. Additionally, it should be noted that <br /> utilizing an alarm service to call out staff for overall facility alarms has been <br /> successfully used for 30+ years. <br /> 3) Plant-Wide Preventative Measures - This has been answered by the discussion on <br /> the maintenance procedures in Item 1 and the alarm system explained in Item 2. <br /> The City's new permit and Board's staff action on this chlorine release has not gone <br /> unnoticed by City Staff. I have directed staff to review other systems and their <br /> alarms within the facility. In addition, we are completing bid documents to contract <br /> out our instrumentation maintenance. This will improve overall reliability of our <br /> instrumentation system. This process was started in July 1999 at the beginning of <br /> our current budget year. <br /> 4) Contingency Plan - Our contingency plan to minimize the effects of a discharge <br /> during upset is to bypass the flow to our holding pond during the entire upset. <br /> Depending on the treatment needed, we could then return that flow to one of three <br /> locations in the treatment train. The call-out procedure requested is Page 3 of <br /> Exhibit B of this correspondence. <br /> 5) Cost Estimates - The cost to modify the alarm system was approximately $500, <br /> which included parts and labor. The cost to staff the plant on a 24-hour basis is <br /> substantial. We estimate we would need to add two staff members at an annual <br /> cost of approximately $110,000. <br /> Sincerely, <br /> �_RW d Pzzw <br /> Richard C. Prima, Jr. <br /> Public Works Director <br /> RP/DK/mk <br /> Enclosures <br /> cc: Fran Forkas,Water/Wastewater Superintendent <br /> Del Kerlin,Assistant Wastewater Treatment Superintendent <br /> T. Brett Moroz, Chief Wastewater Plant Operator <br /> Tom Huetteman, U.S. Environmental Protection Agency, Region IX, San Francisco <br /> Lisa Brown, California Environmental Protection Agency, Sacramento <br /> Frances McChesney, Office of Chief Counsel, State Water Resources Control Board, Sacramento <br /> John Norton, Office of Statewide Consistency, State Water Resources Control Board, Sacramento <br /> Janna Herren, Department of Fish and Game, Region 2, Rancho Cordova <br /> -,San Joaquin County Department of Environmental Health,Stockton <br /> Bill Jennings, DeltaKeeper, Stockton <br /> WTRQLTYCNTRL9903 <br />