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WASTE DISCHARGE REQUIREM&S ORDER NO.5-01-251 • 3 <br /> CITY OF LATHROP AND CROSSROADS CREA LLC <br /> WASTEWATER TREATMENT PLANT NO. 1 (CROSSROADS),SAN JOAQUIN COUNTY <br /> There is also an intruder alarm. If the alarm is activated, an autodialer sends a message to a private <br /> security firm and the firm contacts either of the two operators by cellular phone. <br /> Sanitary Sewer System <br /> 10. The Crossroads Commerce Center sanitary sewer system does not include any lift stations. <br /> Wastewater flows by gravity to the wet well located at the treatment plant. The treatment plant is <br /> equipped with emergency electrical generators capable of powering the entire treatment plant and <br /> aerators. <br /> 11. The Discharger's sanitary sewer system collects wastewater using sewers, pipes, pumps, and/or <br /> other conveyance systems and directs this raw sewage to the wastewater treatment plant. A <br /> "sanitary sewer overflow" is defined as a discharge to ground or surface water from the sanitary <br /> sewer system at any point upstream of the wastewater treatment plant. Temporary storage and <br /> conveyance facilities(such as wet wells,regulated impoundments, tanks,highlines, etc.) are part of <br /> a sanitary sewer system and discharges to these facilities are not considered sanitary sewer <br /> overflows,provided that the waste is fully contained within these temporary storage/conveyance <br /> facilities. <br /> 12. Sanitary sewer overflows consist of varying mixtures of domestic sewage, industrial wastewater, <br /> and commercial wastewater; this mixture depends on the pattern of land use in the sewage <br /> collection system tributary to the overflow. The chief causes of sanitary sewer overflows include <br /> grease blockages,root blockages, debris blockages, sewer line flood damage, manhole structure <br /> failures, vandalism,pump station mechanical failures,power outages, storm or groundwater <br /> inflow/infiltration, lack of capacity, and contractor caused blockages. <br /> 13. Sanitary sewer overflows often contain high levels of suspended solids,pathogenic organisms,toxic <br /> pollutants,nutrients, oxygen demanding organic compounds, oil and grease, and other pollutants. <br /> Sanitary sewer overflows can cause temporary excedences of applicable water quality objectives, <br /> pose a threat to public health, adversely affect aquatic life, and impair the public recreational use <br /> and aesthetic enjoyment of surface waters in the area. <br /> 14. The Discharger is expected to take all necessary steps to adequately maintain, operate, and prevent <br /> discharges from its sanitary sewer collection system. This Order requires the Discharger to prepare <br /> and implement a Sanitary Sewer System Operation, Maintenance, Overflow Prevention, and <br /> Response Plan. <br /> Planned Changes in Discharge <br /> 15. The Discharger provides industrial and domestic wastewater treatment to the Crossroads Commerce <br /> Center. The Discharger is presently planning to expand the wastewater treatment facility and will <br /> extend service to include more domestic wastewater. The expansion is forecasted to occur within <br /> 3-4 years. <br /> 16. The Discharger plans to continue operating the current wastewater treatment system with certain <br /> changes. Those changes consist of: converting the existing wastewater evaporation/percolation <br /> basins into lined storage ponds, converting nearby undeveloped land into bermed land application <br />