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05/26/2009 13:18 9518273 DOUGLAS KUNEY PAGE 10/10 wastes. I%Wing from a secondary lagoon reduces the solids pickup common in Primary lagoons due to seasonal water turnovers and biological mixing. Sizing of secondary lagoons is not clearly defied or critical. North Carolina recommendations are that the secohd lagoon hive a minimum of 90 days BtOrAV Ofwastewater generated as IndicaLed in Figure I plus enough volume for the combined 25-year, 24-hour rainfall storage frog both lagoons, POULTRY LAGOON HANAGMIM SUMMARY I- New lagoons should be filled one-half full wil water PX1vX to waste input, and the liquid maintained at or above the design treatment level. 2. When possible, manure loading of a new lagoon should begin in the spring to permit a good bacterial population to develop during the warm season. 1 3. Lagoons should be loaded on a frequent regular bads avoiding large shock loadings which cause excessive odors and nutrient level fluctuations. 4. Apply one pound of agricultural lime per 1000 cu]c feet of lagoon volume when the lagoon liquid pH falls below 7 to optimiie bacterial digpxtion. 5. Mechanical aeration a" be used to control Odors, reduce nitrogen content, and reduce surface area but only at higliloperating costs. I 6. Solids separation and removal from raw wastes ei�her mechanically or by gravity settling can reduce the sludge buildup and` organic loading rate. 7, Ramove ,tluelee from 1ALSoons when 7$% of the design treatment volume has accumulated, 8. Prevent additions of bedding materials, long-stei=ed vegetation, molded feed, egg flats and other foreign material or debiis to lagoons. 9. Maintain Strict vegetation, rodent and varmint co'Lrol near lagoon edges. 10. Plan lagoon liquid drawdowns such that adequate I wastewater storage is available during wet seasons. 11. Do not lower the lagoon liquid level below the seasonal groundwater table i . 12. Irrigate lagoon liquid with equipmenL selected z� handle the particular waste characteristics, whenever the lagoon fills �P the top of the normal wastewater storage level, on field crops or grassland at agronomic rates. i 13. Locate pump intakes approximately 18 inches underneath the liquid surface and aA fAr from the waste inlet to the lagoon as possible. 14. Electric pump housings should be adequately grounded to prevent stray voltage from contributing to salt deposits on pump internal surfaces. I 15. Irrigate when odors gra- apt to be least offen_-L�,vc, on days with low humidity, or when breezes are blowing away from neighboring residences. 33