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WASTE DISCHARGE REQUIRE-ENTS ORDER NO. 2 <br /> LINNE ESTATES,LLC <br /> LINNE ESTATES WASTEWATER TREATMENT SYSTEM <br /> SAN JOAQUIN COUNTY <br /> 8. After preliminary screening, wastewater may be diverted to emergency storage, consisting of two <br /> buried tanks that provide 60,000 gallons of storage. Normally, wastewater will flow from the <br /> screening to an Influent Equalization System (IES), which consists of a 24,000 gallon buried tank. <br /> The IES will be aerated with diffused air to maintain aerobic conditions and prevent nuisance odor <br /> conditions. <br /> 9. Wastewater will then flow to an aeration tank, which is a 40,000 gallon buried tank that is <br /> equipped with air diffusers to provide aerobic treatment. The aeration tank will be equipped with <br /> a continuous dissolved oxygen control system. Wastewater is pumped from the aeration tank to <br /> either the batch clarifier or the anoxic denitrification system. <br /> 10. The anoxic denitrification system is a 20,000 gallon buried tank which will receive nitrified <br /> activated sludge mixed liquor to reduce dissolved oxygen concentrations for denitrification. The <br /> tank will be equipped with a mixing system and continuous dissolved oxygen concentration <br /> metering. <br /> 11. The batch clarifier is a 16,000 gallon buried tank. The clarifier will provide sedimentation and <br /> additional denitrification. Clarified effluent will be transferred to the filtration system. Settled <br /> sludge will either be pumped to the aeration tank or the aerobic sludge digesters. <br /> 12. Treated wastewater will be filtered through a multi-media pressure filtration system. The filters <br /> contain silica sand, garnet, and anthracite coal. Filter backwash water will be diverted back into <br /> the equalization tank for retreatment. <br /> 13. After filtration, the wastewater will enter the ozone contact chamber, which is a 5,000 gallon <br /> buried tank. Ozone will be generated on-site as needed. The disinfection will be operated in a <br /> batch mode. A liquid chlorine backup system will also be available. <br /> 14. Filtered and disinfected wastewater will be stored in a 9,000 gallon buried effluent-pumping tank <br /> prior to discharge at the dispersal area. <br /> 15. Waste activated sludge will be discharged to a 16,000 gallon buried aerobic digestion tank and <br /> periodically pumped for off-site disposal. <br /> 16. Treated wastewater will be discharged to a 1.7 acre dispersal area through a computer controlled <br /> emitter system. Emitters will be grouped into six zones. Moisture sensors located in the dispersal <br /> area will allow monitoring of soil moisture and will change the application of wastewater to <br /> prevent over application of wastewater and saturated soil conditions. Turf grass will be grown in <br /> the dispersal area. The grass will be mowed and the clippings removed from the dispersal area. <br /> 17. On 29 July 2003, Kleinfelder, Inc. performed percolation tests. Based on the calculated infiltration <br /> rate (9 min/inch) presented in the 22 September 2003 Geotechnical Services Report, use of an 8- <br /> percent safety factor (as recommended by U.S. EPA), and the disposal area available, the volume <br /> of wastewater to be applied consists of approximately 9.3-percent of the available hydraulic <br /> capacity of the dispersal area. <br /> W:\StaWbriwTPSau JoaquinLLinnc Estaw\Unnc WMR rLdm <br />