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INFORMATION SHEET CITY OF MANTECA SLUDGE APPLICATION TO LAND SAN JOAQUIN COUNTY The City of Manteca utilizes wastewater treatment plant sludge from its wastewater treatment plant as a soil amendment on lands owned by the City of Manteca. These lands are farmed by Mr. Anthony K. Dutra, who leases the City's property. Surface water drainage is to the San Joaquin River. Air-dried, anaerobically digested sludge with greater than 50 percent solids will be applied once per year, or less, to approximately 210 acres of farmland owned by the City of Manteca and leased to Mr. Dutra. It has been estimated that the sludge will be applied at rates up to 3.3 tons per acre per year to most of the 210 acres. Loading rates are established based on crop utilization and limits imposed by annual and/or cumulative metal loading criteria. Wastewater effluent form the City's treatment plant is also discharged to the farmland during the summer months. The pollutants in the effluent are accounted for in determining appropriate loading rates. To protect ground water, the sludge/soil mixture will not be allowed to exceed maximum soluble metal concentrations. Crops may include oats, beans, sugar beets, corn, green tomatoes, freezer peas, onions and garlic for dehydration, and wheat. Prior to planting tomatoes and other similar crops, no sludge will be applied to those field for a minimum of three years prior to planting those crops. Sludge will be applied during a 6-week period in the fall and incorporated into the soils within 48-hours. No storage of sludge on-site is currently allowed. The City of Manteca has submitted a Sludge Management Plan that meets the regulations and guidelines found in 40 CFR 257, "Criteria for Classification of Solid Waste Disposal Facilities and Practices", U.S. Environmental Protection Agency (EPA), September 1987, and the Manual of Good Practices for Lanspreading of Sewage Sludge, Department of Health Services, Sanitary Engineering Branch, 1983. The City of Manteca Wastewater Treatment Plant is regulated by Waste Discharge Requirements Order No. 91-110, NPDES permit No. CA0081558. The City of Manteca is in the process of developing an EPA approved pretreatment program. The sludge is required to be evaluated and classified. The sludge generated by the City of Manteca 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 (CCR), Section 2510, et seq. , (Chapter 15) per Section 2511(f) . These requirements prohibit the application of hazardous or designated classes of sludge. Hazardous classification criteria is based on the requirements of 22 CCR, Article 11, Criteria for Identification of Hazardous and Extremely Hazardous Wastes. Designated levels are found in the Manual of Good Practices for Lanspreading of Sewage Sludge, delineated above. 02/10/92:AMM