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California . . -gional Water Quality Con A Board <br /> Central Valley Region <br /> Karl E.Longley,SCD,P.E.,Chair (0 <br /> Linda S.Adams Arnold <br /> Secretaryfor Sacramento Main Office Schwarzenegger <br /> Environmental 11020 Sun Center Drive#200,Rancho Cordova,California 95670.6114 Governor <br /> Protection Phone(916)464-3291 •FAX(916)464-4645 <br /> http://www.waterboards.ca.gov/centralval ley <br /> 18 December 2007 <br /> Ms. Zoe Haworth <br /> 22651 South Frederick Road <br /> Ripon CA 95366 <br /> Dear Ms. Haworth <br /> On 10 December 2007, the California Regional Water Quality Control Board — Central Valley <br /> Region (Regional Board) staff collected groundwater samples from the domestic well located <br /> at 134 N. Airport Way (formerly known as 17950 Airport Way) in Manteca. The samples were <br /> submitted for analyses to California Laboratory Services in Rancho Cordova, CA. Copies of <br /> the laboratory sample results are enclosed. The "Before" sample was taken from the well. The <br /> "After" sample was taken after the treatment system and before reaching the house. We will <br /> provide additional sample results from the treatment systems in a separate letter. The <br /> following "Before" and "After" bacteria tests came back positive. <br /> Date Sample Total Coli forms E Coli DHS Limit <br /> 12/10/2007 Before 21.3.0 <1.0 <1.8 <br /> 12/10/20074 After 3.0 <1.0 <1.8 <br /> 1 -California Department of Health sciences limits for bacteria are less than 1.8 MPN,or most probable number. <br /> 2 —twenty four hour microbiological parameters by ALPHA standard methods(reports total coli form and E.Coli) <br /> For all questions regarding health concerns and additional guidance for sterilization of wells, <br /> contact the San Joaquin County Public Health Officer at (209) 468-3411. For other questions <br /> please contact me at (916) 464-4615. <br /> Para mas informacion o respondes de preguntas tocante esta noticia, (lame al (916) 464-4634 <br /> y pregunte por la Sra. Leticia Valadez, vocero por EI Consejo de Manejo de Recursos Hidricos <br /> Estatales. <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> Enclosure <br /> cc with Enclosure: <br /> Dr. Karen Furst, San Joaquin County Public Health Officer, 1601 E. Hazelton Ave, <br /> Stockton 95205 <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, 600 E. <br /> Main St., Stockton 95202 <br /> Tenant, 134 N. Airport Way, Manteca 95337 Wj <br /> California Environmental Protection Agency . <br /> ca Recycled Paper <br />