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WASTE DISCHARGE REQUIREMENTS CITY OF MANTECA SLUDGE APPLICATION TO LAND SAN JOAQUIN COUNTY -3- 9. The Board has adopted a Water Quality Control Plan, 2nd Edition, for the Sacramento-San Joaquin Delta Basin (5B) . These requirements are consistent with that Plan. - 10. The application site of the Discharger is in Section 4 T2S, R6E, MDB&M. Surface water drainage is to the San Joaquin River. 11. The beneficial uses of this reach of the San Joaquin River are industrial and agricultural supply; recreation; aesthetic enjoyment; and preservation and enhancement of fish, wildlife, and other aquatic resources. 12. Depth to ground water in the area at the site is currently 5 to 10-feet below ground surface. The ground water at the site is currently monitored under Order No. 91-110. See Attachment C, which is included as part of this Order, for the monitor locations. 13. The beneficial uses of underlying ground water are domestic, industrial , and agricultural supply. 14. Precipitation in the area averages 9.6 inches annually. 15. The disposal fields are outside of the 100-year floodplain, as shown on the Federal Flood Insurance Map, but within the 100-year floodplain proposed by the United States Army Corps of Engineers. 16. The Updated Sludge Management Plan submitted by the Discharger presented information that showed that the total nitrogen in the sludge and wastewater effluent to the cropland exceeded the nitrogen requirements of the crops produced on the land. The volume of wastewater effluent applied to the crops will be controlled to reduce the nitrogen and other nutrient loadings to that required by the crops. It is estimated that an annual loading rate of 2.39 million gallons of wastewater effluent can be applied to the crops. Excess effluent produced by the WQCF will be discharged to the San Joaquin River under NPDES Permit No. CA0081558. The Management Plan also stated that the life of the 210 acre site will be 35 years, based on cumulative metals loading at the current concentrations in the wastewater and sludge. 17. The City of Manteca sludge is a non-hazardous decomposable waste applied as a soil amendment pursuant to best management practices and, as such, is exempt from the requirements of Title 23, California Code of Regulations, Section 2510, et seq. , (Chapter 15) per Section 2511(f) . 18. A negative declaration for this project has been prepared in accordance with the California Environmental Quality Act (Public Resources Code, Section 21000, et seq.) and the State Guidelines. The project as approved will not have an adverse effect on the environment. 19. The Board notified the Discharger and interested agencies and persons of its intent to prescribe waste discharge requirements for this discharge, and