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aqua science <br /> am• MOL <br /> ® mr� . MOT - . eHoliffeers Inc. <br /> September 21, 2000 <br /> Mr and Mrs Rossi <br /> 495 Airport Way <br /> Manteca, CA 95337 <br /> SUBJECT WATER WELL SAMPLING RESULTS <br /> 495 and 511 Airport Way <br /> Manteca, CA 95337 <br /> Dear Mr And Mrs Rossi <br /> On Septembei 1, 2000, Aqua Science Engineers, Inc (ASE) collected <br /> groundwater samples from the domestic well located on your property at <br /> 495 Airport Way in Manteca California The samples were submitted to <br /> Kiff Analytical Laboratory in Davis, California for analysis <br />• Groundwater samples collected from your well contained 079 parts p e r <br /> billion (ppb) 1 ,2-dichloroethane (1,2-DCA) and 051 ppb 1 ,2- <br /> dichloropropane (1,2-DCP) A confirmation groundwater sample <br /> collected from your well on September 7, 2000 contained 066 ppb 1 ,2- <br /> DCA <br /> ,2- <br /> DCA but did not contain a detectable concentration of 1,2-DCP The <br /> California Department of Health Services (DHS) has established a <br /> maximum contaminant level (MCL) for 1,2-DCA in drinking water of 0 5 <br /> ppb and a MCL for 1,2-DCP in drinking water of 5 0 ppb The 1,2-DCA <br /> concentration detected in groundwater samples collected from your well <br /> on both occasions exceeded the DHS MCL for drinking water Based o n <br /> these results, water from that well should not be used f o r <br /> drinking or for cooking. As you are already aware, an alternative <br /> water source has been supplied to you Please continue to use t h e <br /> alternative water supplied to you until further notice <br /> ASE also collected groundwater samples from the domestic well on' youi <br /> property at 511 Airport Way on September 1, 2000 Groundwater <br /> samples collected from that well did not contain any detectable <br /> concentrations of any of the compounds analyzed <br /> 208 W Fl Pmfado, Danville, Califomio 94526 • 925 820-9391 Fax 925 8374853 <br />