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•..t <br /> '~ TABLE 9 <br /> SELECTED WATER ANALYSIS: <br /> DOMESTIC WELLS, IRRIGATION WELL AND BEAVER SLOUGH <br /> SAMPLE NITRATE DBCP/EDBTOTAL TOTAL COLIFORM <br /> LOCATION (AS NO,) DISSOLVED <br /> SOLIDS <br /> HOME RANCH 19 ppm BDL 448 ppm Absent <br /> NEW WEST (Below Detection Limits) <br /> DOMESTIC WELL <br /> HOME RANCH 46 ppm BDL 570 ppm Absent <br /> NORTH <br /> .. DOMESTIC WELL <br /> (West of the Office) <br /> ACAMPO RANCH 78 ppm BDL 358 ppm Absent <br /> DOMESTIC WELL <br /> HOME RANCH 25 ppm N/A 664 ppm N/A <br /> IRRIGATION <br /> WELL <br /> BEAVER 5 ppm N/A 134 ppm N/A <br /> SLOUGH <br /> IV. MASS BALANCE OF NITRATE-NITROGEN LOADING FOR <br /> THE EHD NITRATE LOADING STUDY <br /> A. SPECIFIC NITROGEN SOURCE CONSIDERATIONS <br /> The investigative factors of any nitrate source identification procedure involves the assessment of <br /> the site to inventory and identify all potential nitrate sources. This Study identifies all on-site <br /> nitrogen sources which may contribute a certain percentage of the total amount of nitrate to the <br /> environment from the dairy and heifer facilities and surrounding cropland. The nitrate loading <br /> potential originates from primarily four sources: 1.) Corral Areas - open corrals, covered loafing <br /> barns and the freestall barns. 2.) Nutrient Containment Structures: holding ponds, separation <br /> basins, and irrigation conveyance ditches, 3.) Silage Storage Areas, 4.) Septic System <br /> Contributions, and 5.)Nutrient Applications Areas. Each of the sources and their potential <br /> nitrate nitrogen concentration are discussed below: <br /> 1.) The Corral Areas: Freestall barns theoretically contribute a small volume of nitrogen to the <br /> underlying soil due to the concrete-lined flush system which transports wastes from these barns. <br /> Very little waste from the cow is deposited within the actual freestall. In addition, since these <br /> freestall barns are covered, there is no hydraulic head from rainfall or other water sources that could <br /> drive ammonium and nitrate molecules continually deeper into the soil. <br /> -17- <br /> Ch&vwy Consulting <br />