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WASTE DISCHARGE REQUIREML:iiTS ORDER NO.R5-2003-0099 3 NEWPORT PACIFIC CAPITAL COMPANY,INC. ARBOR MOBILE HOME PARK WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY 11 February 2003 17 February 2003 Constituent Units Water Supply Wastewater Water Supply Wastewater Total Dissolved Solids mg/l 220 350 260 380 Sodium mg/l 14 47 15 49 Chloride mg/l 14 44 14 48 18. On 27 February 2002, Regional Board staff inspected the facility at the request of the San Joaquin County Department of Environmental Health and found the system to be failing. Wastewater surface spills were evident at the site and the seepage pits were full of wastewater. 19. In response to the failing system, the Discharger improved operational controls to limit suspended solids discharged to the seepage pits. Monitoring was conducted to evaluate the performance. The following data indicates the system performance improvements: Influent Effluent Removal % Month Units BOD TSS BOD TSS BOD TSS February 2002 mg/L 121 90 74 50 39 44 March 2002 mg/L 128 138 89 115 30 20 April 2002 mg/L 119 128 37 47 69 63 May 2002 mg/L 162 153 16 15 90 90 20. An operation and maintenance manual, "Arbor MHP Waste Water Treatment Facility, "was prepared for the system and included in the RWD. The manual does not address reporting requirements that are necessary to assure complance with this Order and therefore must be updated. COLLECTION SYSTEM 21. A collection system"overflow"is a discharge to ground surface or to surface water from the collection system, wastewater treatment system, or disposal area. Temporary storage or collection facilities may be utilized during maintenance operations and discharges to these facilities are not considered overflow events,provided that the waste is fully contained and properly disposed of. 22. Potential causes of overflows within this system include grease blockages, root blockages, debris blockages, sewer line flood damage,vandalism, storm or groundwater inflow/infiltration, lack of capacity, power failures, and contractor caused blockages. 23. Sanitary sewer overflows often contain high levels of suspended solids,pathogenic organisms, nutrients, oxygen demanding organic compounds, oil and grease, and other wastes. Sanitary sewer overflows can cause temporary excedences of applicable water quality objectives, pose a threat to public health, adversely affect aquatic life, and impair the public recreational use and aesthetic enjoyment of surface waters in the area. 24. The Discharger is expected to take all necessary steps to adequately maintain and operate, and thereby prevent overflows from, its collection system. A reasonable means to accomplish this is to