Recycled Water Program, Phase II CLWA- 1

Transcription

1 Recycled Water Program, Phase II CLWA- 1

2 Description: This project includes the planning, designing, and construction of a new recycled water storage tank, pump station modifications, and new recycled water pipelines. The recycled water pipelines will transport recycled water from existing Valencia Water Reclamation Plant to a new recycled water storage tank and recycled water customers.

3 Benefits: This project will help provide an important and reliable source of additional water for the Santa Clarita Valley. The project will also help with reducing the amount of future effluent that would be discharged into the Santa Clara River. The project would help in meeting future TMDLs, particularly for chloride.

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5 Removing Chloride Dr. David Kimbrough Castaic Lake Water Agency CLWA - 2

6 Problem The California State Water Resources Control Board and the USEPA have listed several reaches of the Santa Clara River Impaired due to excess quantities of chloride. It is believed that this excess chloride causes damage to avocados and strawberries, important corps in Ventura County

7 Possible Solutions The Sanitation Districts of Los Angeles County (SDLAC) can spend over $300,000,000 to remove chloride from their discharge by Reverse Osmosis. Remove chloride from source waters before they arrive at the SDLAC.

8 CLWA-SDLAC Study Convert chloride (Cl - ) to chlorine (Cl 2 ) by electrolysis. Volatilize the Chlorine by either electrolysis or air stripping. Capture and neutralize the chlorine vapors. This has proven to effective at reducing the concentrations of bromide (Br - ) in source waters.

9 Removing Bromide Dr. David Kimbrough Castaic Lake Water Agency CLWA - 3

10 Problem Bromide is found in the source waters of the Castaic Lake Water Agency and many other water utilities. Bromide (and Chloride) enter the San Francisco Bay Delta via sea water intrusion. Bromide reacts with a variety of disinfectants to produce by-products which may cause cancer and birth defects.

11 Source of Water & Bromide

12 Possible Solutions There are no existing technologies to remove bromide from large values of surface water in a cost-effective fashion. A Peripheral Canal could be constructed to move fresh water from the Sacramento River around the Bay-Delta.

13 CLWA-MWDSC Study Convert bromide (Br - ) to bromine (Br 2 ) by electrolysis. Volatilize the bromine by electrolysis. Capture and neutralize the bromine vapors. A proof of concept study has already been completed which was funded by the American Water Works Association Research Foundation.

14 Proposal Design and construct pilot plants for the optimization of this process to California State Water Project water.

15 Large Landscape Efficiency Improvement Program CLWA - 4

16 Description: Project will include the Landscape Maintenance districts (LMD s), HOA Common areas and regional and local parks in the Santa Clarita Valley On-site maintenance staff will have training and an understanding of the issues causing their site to use more water. Qualifying Sites will get a free ET controller to demonstrate the maximum achievable results. Project objective can be measured by comparison of the metered sales of the water at the project site to the prepared water budget. Estimated cost is between $450,000 and $675,000. Annual operation and maintenance cost is between $500 to $1,000.

17 Benefits: Primary benefits are to reduce the demand on the State Water Project by increasing the irrigation efficiency of the existing landscapes of the valley s s largest water users. Secondary benefits are reduced irrigation runoff from the project sites. Average Year demand reduced by 800 A/F Reducing demand for these sites leaves existing capacity available for other uses, thus helping to meet the goal objectives of the IRWMP.

18 Customer Recycled Water Incentive Program CLWA - 5

19 Description: This project would fund hook-up costs to the system providing an incentive for the end-user. Project would consist of providing financing to customers to pay for a licensed plumber/contractor to connect the recycled water system, meter or other equipment connected to the system. This project would offset some of the capital costs to the user of recycled water in order to keep the financial incentives of recycled cled water relative to potable water available. Financing would be very favorable terms that could be repaid by paying potable rates for recycled water and using the difference to pay for the hook-up costs. Both the reduction in effluent and use of recycled water would be b metered. Possible funding will be supplied by CLWA, local water purveyors, and the SCV Sanitation District.

20 Benefits: This project contributes towards the water reduction demand by using the recycled water for irrigation of parks, golf courses, landscaping and industrial applications. Use of recycled water will decrease the need for imported water. This helps to preserve the supply of potable water for other uses. Increase use of recycled water by approximately 1,600 AF per year r ( low estimate). The project will provide a reliable source of additional water for f the Santa Clarita Valley It will also help reduce the amount of future effluent that would d be discharged into the Santa Clara River from the Sanitation District of Los Angeles County.