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Cattle in Dry Lots (Scrape): <br /> ANIMAL LBS (N) PER DAY DRY (COLLECTED @ <br /> CLASSIFICATION CORRALS) <br /> 100% <br /> Lactating (milking) 0 0 <br /> Dry & Bred Heifer 0 0 <br /> _ Heifer 1 ear- bred 0 0 <br /> Calves (3 months — 1 30 30 <br /> ear <br /> Baby Calves (up to 3 5.5 5.5 <br /> months <br /> TOTAL NITROGEN <br /> COLLECTED PER <br /> DAY: 35.5 <br /> *Nitrogen flushed from concrete cow lanes will flow through settling ponds. <br /> *Settling ponds typically collect 80% of the solids prior to reaching the lagoon. <br /> •Settling ponds retain approximately 20% of the nitrogen prior to reaching the lagoon. <br /> Lbs of flushed nitrogen collected in settling pond <br /> (WET COLUMN X 20%) 580.64 x .20 = 116.13 lbs. per day <br /> Lbs of nitrogen reaching anaerobic lagoon <br /> (WET COLUMN X 80%) 580.64 x .80 = 464.51 lbs. per day <br /> Yearly nitrogen production: <br /> Total nitrogen in solids per year from corrals: <br /> (DRY COLUMN X 365) 180.66 x 365 = 65,940.90 lbs. N per year <br /> Total nitrogen in solids per year in aerobic settling <br /> pond: 116.13 x 365 = 42,387.45 lbs. N per year <br /> Total nitrogen in liquids at anaerobic lagoon: 464.51 x 365 = 169,546.15 lbs. N per year <br /> Nitrogen retention (losses) calculations from storage: <br /> Nitrogen retained from storage in dry lot corrals: 55-70% Use 60% <br /> Nitrogen retained from storage in aerobic settling pond: 35-45% Use 40% <br /> Nitrogen retained from storage in anaerobic lagoons: 20-35% Use 25% <br /> Refer to page 24 for Endnotes and Reference Sources <br /> Nitrate Loading Study <br /> Property Name and Address: Frank Faria Dairy, Inc. 12182 S. Robinson Road, Escalon, CA 95320 <br /> Page 9 <br /> Western Design/David Avila 2001 <br /> Mass Balance of Nitrogen Loading <br /> IXF <br />