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JAMES D ROWNSONT.IYE,CECT page 5 <br /> March 23,2010 <br /> r � t Nt mber2010-131 <br /> ground water lies between 24 and 28 deet below man sea level 54 to 58 feet t elow the groan <br /> and flys northwest at the gradient of 3.8cwt per mile in the vicinity o the site, <br /> Ground Water Contamination Issues in the :area <br /> Potential groundwater issue in the area consist f contamination 11 om leaching of <br /> agricultural emica*- `e systwu usage and swm water infiltradon. <br /> Current and Fnturt Groundwater Uses <br /> The site currently uses groundwater wells to provide water to the one residence md larrdscapin . <br /> In addition,the land eft of the residences is irrigated well wawa propo wdaddition of a <br /> Meetmg Center will increase mater.usage at the site, <br /> m SOURCES AND C LCtTLAT D IMPACT OF NITRATE TO GROI JNDWATER <br /> CortOff-site Sources of Nitrate <br /> Septic systems, agriculture chemical application, dairies and wineries it the are may be <br /> the most significant tomes of introduction of nitrate into the groundwater, <br /> RainfAil Contribution <br /> Rainfall data was collected from the Western Regional Climate Center, Evapo ranspiration data <br /> from theCalifornia Irrigation gent InformAon y�� � . , fleeted : nothe <br /> closest station to the subject pro'per'ty" The data is us-' to determine the N unt of possible <br /> percolation. On mombs dw precipitation exceeds evapotranspiration,the 111tion l amount of <br /> rainfall is consisted the amok which could percolate into the subsurface. Fc rdn"s calculation <br /> 1144;VALLEY SPRNGS, 95 ,V .. 642 <br /> k -,i °FAX )7404303 <br />