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CITY OF LINO LAS 10/24/94 Management Practices General There are numerous water management practices available to the City. Implementing practices dealing with water quantity ,and quality, reaction, aesthetics, groundwater recharge and wildlife habitat is the goal of this plan. Reducing runoff rates by using detention, infiltration and wetland storage can provide the means for flood control, nutrient and sediment removal from runoff. Groundwater recharge, maintenance of wildlife habitat and enhancement of the aesthetics associated with these areas can also be realized. There are three methods for improving surface water quality. The first is to control pollutants at the source. The second is to provide for the collection of runoff and its associated pollutants downstream of the source area. The third is to provide treatment of runoff by physical, chemical, biological, or a combination of these methods prior to its discharge to a lake or primary waterbody. Often one or more management practice may be used to achieve the desired pollutant reduction of runoff. Management practices used to reduce peak runoff rates can also control non point source pollution. However, unique management practices are most often necessary in areas requiring drastic water quality improvements, such as lake restoration projects. The management practices used should be designed to provide a particular benefit. Generally,_ surface water management practices can be broken into several categories: Storm Water Storage & Design These practices are widely applicable and especially appropriate in achieving multipurpose benefits or uses. These practices are geared toward improving water quality and quantity control concurrently, when properly designed and used. A well designed system can reduce total suspended solids (TSS) by 90 %, chemical oxygen demand (COD) by 75 %, and nutrients by 50 %. Detention practices will be effective only if there is a high quality maintenance of the facility. The practices consist of the following: Local Water Management Plan SEH No. A- LINOL9402.00 Reference Document Page 63