CC Min 2002-08-26 Reg - Laserfiche WebLink

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potable and recycled water, including the accepted aspects of recycled water and how they are mitigated. City Manager Everett stated that the big picture is we are using more water than we are allowed to use. We are using it because other cities do not need it now. We will need it in the future and we won't have it so we need to get more water. We think the likelihood of getting it from another city is close to zero, so we will have aggressive conservation, and if Council chooses an aggressive recycling program. If we don't do those, than we will have to cease growing and face a shortage in 2009, when our existing contract comes due and we are over our allotment. M/S Ira/Ruskin to review and accept the final report - Water Recycling Feasibility Study for Redwood City prepared by Kennedy/Jenks Consultants; and direct staff to begin public awareness program for proposed project. The motion passed by a unanimous voice vote. MINUTE ORDER 02-246 D. Selection of Landscapes Suitable for Irrigation with Recycled Water - Presentation by Nelda Matheny, President, HortScience, Inc.; Nelda Matheny stated that she was asked to speak on this issue tonight because she is unable to attend the meeting on September 16. She stated that recycled water for landscapes has been used for decades and California there are hundreds of communities that use recycled water. She stated that there are significant issues to be concerned with when changing from a potable water source to a recycled water source on existing landscape. The four issues are water quality, plant tolerances and requirements, the type of irrigation present, and the site conditions (primarily soil). Water Quality: The quality of the water coming out of the recycled units depends upon the potable water coming out of the tap. The water then acquires some components, which is called wastewater; the wastewater then goes into a serious of treatments with the quality of water coming out dependent upon what the treatments consist of. Based on the proposed project, the recycled water will have advanced treatments and actually meets the requirements for consumption, although consumption is not planned. Plant Tolerances and Requirements: The salts accumulate in the soil after each watering. Plant requirements are different than those for human consumption and different criteria must be used for interpreting the analysis. The quality of the water cannot be based solely on human tolerance, but from a plant tolerance aspect. Tap contains salts and recycled water contains more salt and chloride ions. The analysis shows in regards to the total salts, the level of 1,500 is a potentially moderate problem. The REGULAR COUNCIL MEETING AUGUST 26, 2002 MINUTES PAGE 8 MINUTES Book No. 59 Page No. 242