COMPLIANCE INFO_1991-2006 - Laserfiche WebLink

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S WASTE DISCHARGE REQUIREMENTS CITY OF MANTECA SLUDGE APPLICATION TO LAND SAN JOAQUIN COUNTY -2- appropriate allowable sludge loading rates. Wastewater effluent volumes will likely be the manner in which applied nutrient loadings will be manipulated given that the effluent supplies the greatest mass of nutrients. 6. Sludge will usually be applied during the fall after the sludge has dried. The sludge will be transported from the City of Manteca Water Quality Control Facility to the fields and will be incorporated into the soil within 48-hours after spreading. These requirements do not allow storage of sludge at the disposal area. 7. The Discharger reports that the City of Manteca sludge is treated to meet the standards for a process to significantly reduce pathogens as defined by 40 CFR 257, Appendix 11 (60 days at 15°C to 40 days at 20°C, with volatile solids reduction of at least 38%) and is characterized as follows: Total Concentration (dry weight) Constituent (mg/kg) Arsenic 1.16 Barium 124 Cadmium 1.69 Chromium 7.06 Copper 89.6 Lead 24.4 Mercury 0.84 Nickel 7.16 Selenium 0.42 Silver 11.1 Zinc 182:6 Molybdenum 1.1 Total Nitrogen 8500 Phosphorus 16400 Total Solids (percent) 75% 8. The Discharger has agreed that the following limitations shall be imposed after application of sludge: a. Public access will be controlled for at least 12 months; b. Grazing by animals whose products are consumed by humans will be prevented for at least one month after sludge application; C. If the site is used as pasture, grazing by milking animals will be prevented for at least 12 months after last sludge application. d. On a given field, there will be no planting of unprocessed food crops for three years after sludge application.