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Dairy animal manures in both the solid and liquid forms are applied carefiilly with the proper techniques and controls. This ensures an equal distribution of nitrogen, phosphorous and potassium (NPK) for pasture grass uptake,thus preventing excessive leaching past the root zone. � Dried manure is also used for bedding. Mr. Van Vuren currently milks 150 cows with approximately 10 -15 heifers. Total acreage that accepts solid manures which are owned or under the control of Mr. Van Vuren is 250 + 86 = 336 acres. Calculatingthe nitrogen loading from the milk cows: 1.4 x 150 milk cows= 210 Animal Units (AU)x 0.56 N/AU/day x 0.8 (flush water) x 50%N - retention x 365 days/yr= 17,170 lbs N in liquid form produced each year at the dairy facility. Calculatin the he dry nitrogen loading from the milk cows: 1.4 x 150 milk cows= 210 Animal Units (AU) x 0.45 N/AU/day x 0.4 (handled dry) x 50%N retention x 365 days/yr= 6,900 lbs N in dry form produced each year at the dairy facility. TOTAL NITROGEN PRODUCED AT THE VAN VUREN DAIRY= 24,070 lbs/year Pasture Grass Nitrogen Requirements= 250 lbs N/Ac x 336 Ac = 84,000 lbs N required minus I 24,070 lbs N produced= 60,000 lbs N deficit after solids and nutrient water applications. CONCLUSIONS AND RECOMMENDATIONS From visual observations, there is no sgnificant surface contamination. Slight oil and/or diesel spillage was observed. The_ probability of subsurface contamination from pesticides can be considered extremely low- to-nonexistent, considering the organic operation of the dairy. The surface soil type (<5 ft) is predominately a silty clay/clayey silt. The biological activity of this soil type would be expected to be higher than in sandy soils, thus creating a favorable environment for microbial decomposition of organic molecules. Thi-ellhead-around.the-re eer nced irrigation well i.s severely cracked and since it is an irrigation well,-it-prQbabl3-has-no,groutseal. Therefore, it is recommended to drill a new domestic well with a proper grout seal. It is also recommended that the water aquifer(s)that this well will draw from be tested before the depth of the well is finalized. This new domestic well water may be tested for a multi-residue pesticide screen consisting of analysis for Dinitroanaline, Triazine, Organochlorine and Organophosphates if it is used for drinking and/or cooking purposes, but it - more im octant to test it for nitrate and DBCP since DBCP has been found in the groundwater in this locale. However, regardless of the well water chemical analyses, bottled water should be used for drinking and cooking. The subject property is outside of delineated areas in which all new wells must have a grout seal to 200 feet. - Valley Ag Research -