AWWA MTC69785

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Reclaiming Monterey Bay Storm Water for Beneficial UseEverest, William R. Edition: Vol. - No.
American Water Works Association / 01-Nov-2009 / 9 pages

This paper evaluates the feasibility of a potential Pacific Grove Storm Water Recycling Facility (SRF)that would divert storm water, provide treatment, and deliver recycled water to several irrigation sites inthe City. The runoff analysis shows that there is sufficient runoff from the Congress storm drain watershed evenin a typical hydrologic average year to meet the City's irrigation demands. The runoff must be retainedduring the fall-winter wet period so that it is available for recycling during the spring-summer irrigationseason. A new 15 million gallon concrete reservoir is proposed to be constructed at the CaliforniaAmerican Water Company's David Avenue property. Supplemental irrigation of Washington Park appears to have an additional benefit of enhancing thehabitat of the famous Monarch Butterfly, which is restricted during drought periods.The storm water contains several constituents that must be reduced or eliminated in order to meetaesthetics and comply with regulatory requirements, particularly the California (CA) Department ofPublic Health Title 22 Regulations for irrigation with non-potable water. A treatment plant needs to beconstructed for this purpose, and should include the following processes: trash and debrisseparator; constructed wetlands; microfiltration (MF); ultraviolet light (UV); and, liquidhypochlorite for disinfection. The conclusion of the paper is that the SRF Project is feasible, and would result in thefollowing benefits:reduction of pollution to the Monterey Bay Marine Sanctuary;development of a new local water supply;compliance with Monterey Bay Cease and Desist Order through project implementation; and, enhancement of the critical Monarch Butterfly habitat. Includes tables, figures.

Keywords: Irrigation; Compliance; Runoff; Habitats; California; State Regulations; Ultraviolet Disinfection; Wetlands; Microfiltration; Storm Water




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