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June 15, 2007 <br />San Joaquin County <br />Environmental Health Department <br />600 East Main Street <br />Stockton, California 95202-3029 <br />Website: www.sigov.org/ehd <br />Phone: (209) 468-3420 <br />Fax: (209) 464-0138 <br />City of Lathrop, Parks and Recreation <br />390 Towne Centre Drive <br />Lathrop, CA 95330 <br />Attn: Fred Allen <br />RE: Valverde Park Interactive Water Fountain <br />DIRECTOR <br />Donna Heran, REHS <br />ASSISTANT DIRECTOR <br />Laurie Cotulla, REHS <br />PROGRAM COORDINATORS <br />Carl Borgman, REHS <br />Mike Huggins, REHS, RDI <br />Margaret Lagorio, REHS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Kasey Foley, REHS <br />REVISED <br />This letter will indicate San Joaquin County Environmental Health Department (EHD) <br />approval of drawings submitted for the proposed Valverde Park Interactive Water <br />Fountain SUBJECT TO THE FOLLOWING CONDITIONS: <br />1. The water vault shall be a minimum of 4000 -gallon holding capacity. <br />2. The splash zone shall be sloped so that only water from the interactive water <br />fountain flows back to the underground reservoir. Areas adjacent to the splash <br />zone shall be sloped away from the interactive water fountain to deck drains or <br />other surface water disposal systems in order to keep unwanted fertilizers, dirt, <br />and contaminants from entering the reservoir. The plans show a concrete deck <br />surface of approximately 10-15 feet surrounding the splash zone that slopes back <br />into the fountain. The deck surface must slope away from the splash zone. <br />3. The filter pump and filter are undersized for this project. Due to the size of the <br />underground reservoir tank (4000 gallons) and the requirement that the water in <br />the tank be turned over (completely recirculated) at least once every 30 minutes, <br />the pump and filter sizing must be changed to: <br />Filter pump—at least a 2 H.P. Provide this Department with a cut sheet of <br />the pump. Water turnover must be equal to or greater than 133 gpm. <br />Filter -42) sand filters needed at 4.91 sq. ft./each effective filtration area <br />4. A sign shall be placed at entrances to the fountain providing the following <br />information: <br />CHEMICALLY TREATED WATER — DO NOT DRINK <br />