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R A <br /> STATE OF CALIFORNIA-HEALTH AND HUMAN SERVICES AGENCY ! GRAY DAVIS,Govemor <br /> DEPARTMENT OF HEALTH SERVICES <br /> DRINKING WATER FIELD OPERATIONS BRANCH <br /> 31 EAST CHANNEL STREET, ROOM 270 At <br /> STOCKTON, CA 95202 r;- <br /> t- <br /> t3 C, 2 P 12: 17 <br /> August 24 , 2000 <br /> Eric Trevena, REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 East Weber Street, Third Floor <br /> Stockton, CA 95202 <br /> IRRIGATION WELL AT GREAT VALLEY ELEMEN'T'ARY SCHOOL <br /> I have reviewed the letter of August 22, 2000, from the City of <br /> Stockton to Manteca Unified School District regarding the above <br /> referenced subject . The City has approved the well stipulating <br /> that special precautions may be required to ensure protection of <br /> the potable water supply. To protect the City' s water system from <br /> potential contamination that could result from any cross <br /> connections that may be established between the new irrigation <br /> well and the school' s domestic water system, the school must <br /> install a backflow prevention assembly on the service connection <br /> that provides water from the City of Stockton' s public water <br /> system to the Great Valley Elementary School . This requirement, <br /> however, provides no internal protection of the school' s domestic <br /> water from contamination with unapproved irrigation water in the <br /> event that someone should establish a cross connection on the <br /> school property in the future . Considering the number of <br /> individuals that would be at risk in the event of such a cross <br /> connection, an internal cross connection control program must be <br /> developed. <br /> Therefore, the Department of Health Services is opposed to the <br /> approval and construction of the irrigation well unless the San <br /> Joaquin County Division of Environmental Health includes the <br /> following conditions in the permit issued to the Great Valley <br /> Elementary School : <br /> 1 . Water for domestic use by the Great Valley Elementary School <br /> shall only be provided. by the City of Stockton, a permitted <br /> purveyor of potable water for public use . The Great Valley <br /> Elementary School is herein prohibited from utilizing the <br /> water from the new irrigation well for domestic purposes . <br /> The use of water from the irrigation well for domestic <br />