Water Plant Optimization Study STONEY POINT '(TOWNSHIP OF TILBURY NORTH) WATER TREATMENT PLANT June 1991 Environment Environnement Orrtano ISBN 0-7729-3315-4 WATER PLANT OPTTMIZATTON STUDY Stoney Point (Township of Tilbury North) Water Treatment Plant Project No. 7-2028 June 1991 «ECfCLABU Cette publication technique n'est disponible qu'en anglais. Copynght: Queen's Printer tor Ontano. 1991 This publication may be reproduced for non-commercial purposes with appropriate attribution PIBS 1562 log 89-2302-156 Study conducted by: D. S. Madill of LA FONTAINE, COWIE, BURATTO & ASSOCIATES LIMITED Under the direction of the Stoney Point Project Committee : MOE Gary Martin - Water Resources Branch Rosaire Rivait - Township of Tilbury North Paul Courey - Township of Tilbury North Dan Perdu - Township of Tilbury North Garth Scoggins - Township of Tilbury North Jim Drummond - MOE Windsor Distnct Office Al Stephens - MOE Windsor Distnct Office Bill Gregson - MOE Project Engineering Branch Janusz Budziakowski - MOE Environmental Approvals Branch Gerry Sigal - R. V. Anderson Associates Limited Address all correspondence to: Ministry of the Environment Water Resources Branch W 1 St. Clair Ave. . 4th Floor Toronto. Ontario M4V 1K6 Please note that some of the recommendations contained in this report may have already been completed at time of publicauon. For more information, please contact the local municipality, or the Water Resources Branch of the Ministry of the Environment. SUMMARY OF FINDINGS AND RECOMMENDATIONS The purpose of the Water Plant Optimization Study is to prepare a document that describes the present condition of a water plant with respect to equipment and operation as well as information regarding the quantity and quality of raw and finished water. The report attempts to make recommendations that will allow the plant to operate in an optimum condition so that the best possible finished water quality achieved with is emphasis on particulate removal and disinfection. The approach to optimize the existing is facilities and mal<e recommendations for short term and long term improvements. It is anticipated that the optimization study documents will be updated annually. The Township of Tilbury North will be undertaking a project to modify and expand the Stoney Point Water Treatment Plant. The work will include: Flow measuring systems. Coagulant and coagulant aid storage and feed systems. Gravity filters complete with filter feed pumps and backwash water pumps. Treated water storage and high pumps. lift Diesel engine generator. Fluoride storage and feed system. Renovations to existing building to provide a new chlorine room, office, lunchroom and washroom. Replacement of obsolete and/or inadequate equipment. In an effort to optimize particulate removal and disinfection at the Stoney Point Plant until the plant expansion project is completed, the following are suggested: Physical Improvements Make any necessary repairs and modifications on the clarifier sludge blow down system to allow sludge to be removed more frequently qnd for shorter inten/ols qnd therefore improve clqrifier efficiency. Modify the alum feed system to allow alum solution to be continuously fed into the clarifier inlet pipe. Install a continuous flow-through turbidimeter (with recorders and alarms) to monitor raw water, clarifier effluent and filter effluents. Install a chlorine residual analyzer to monitor plant effluent chlorine residual. Install an extensive alarm system for high clarifier effluent turbidity, high filter effluent turbidity, low chlorine residual, low plant discharge pressure, and intrusion. Install perimeter fencing in order to improve plant security. Studies Conduct a study to determine the time that fiitering-to-waste following a filter baci<wash should last to ensure all the backwash water has been displaced before putting the filter in operation. Investigate the phenomenon of entrained air occasionally causing the water to appear milky. Other Recommendations Produce an operating manual for the plant. Reinstate the clarifier sludge sampling system and institute a comprehensive sludge sampling program. Investigate the feasibility of reinstating the original low lift pump control system if it can be done without costly equipment replacement. Consider increasing plant staff to ensure the continuous supply of acceptable water quality.