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Upgradient Contributions of Agricultural Wastes <br /> There are several sources for the potential degradation of the groundwater that are in the vicinity of <br /> this new dairy facility. <br /> •There are several dairies upgradient. Directly to the south,across the street is the Joe DaSilva Dairy. <br /> Is considered to be slightly to the southwest,or lateral to the ground water under the proposed new George <br /> teVelde Dairy.There are several more dairies,specifically the Manuel DaSilva Dairy,the John DaSilva <br /> Dairy and the Caton Dairy, upgradient that are too far away to be considered in this study. <br /> 'What I consider to be the greatest threat to the ground water that is upgradient is the large acreage of <br /> rice farms. I consider these to have the most potential to infiltrate nitrates to the ground water because <br /> they do not have wet-dry cycles as other farmed crops do. These wet-dry cycles between irrigations <br /> interrupt the hydraulic pressure that is posed from standing water. This constant pressure increases the <br /> potential of elements to be carried down to the static water table. <br /> ®Western Design/David Avila 2000 26 <br />