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WASTE DISCHARGE REQUIREMnNTS ORDER NO.R5-2003-0099 5 NEWPORT PACIFIC CAPITAL COMPANY,INC. ARBOR MOBILE HOME PARK WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY warm freshwater habitat; cold freshwater habitat; migration of aquatic organisms; spawning, reproduction, and/or eary development; and wildlife habitat. 36. The beneficial uses of the underlying groundwater are municipal and domestic supply, agricultural supply, industrial service supply, and industrial process supply. ANTIDEGRADATION ANALYSIS 37. State Water Resources Control Board (SWRCB)Resolution No. 68-16 (hereafter Resolution 68-16 or the "Antidegradation Policy")requires the Regional Board in regulating the discharge of waste to maintain high quality waters of the state (i.e., background water quality) until it is demonstrated that any change in quality will be consistent with maximum benefit to the people of the State, will not unreasonably affect beneficial uses, and will not result in water quality less than that described in the Regional Board's policies (e.g., quality that exceeds water quality objectives). In addition, the policy requires discharges to high quality waters to implement best practicable treatment or control of the discharge. 38. The Regional Board finds that the Discharger has not demonstrated that it is to the maximum benefit to the people of the State of California to degrade groundwater, and therefore groundwater degredation is not allowed under this Order. If the Discharger is degrading groundwater and subsequently elects to make the demonstration that the degradation meets the conditions of State Board Resolution No. 68-16, then the Regional Board will reopen this Order. 39. This wastewater treatment facility provides treatment and control of the discharge that includes advanced treatment, disposal to the seepage pits and gravelless leachfield, and evaporation and percolation as disposal methods. 40. Wastes that pass through the treatment system are discharged to the seepage pits or gravelless leachfield; the soil then treats some of the remaining wastes. The amount of treatment depends on the waste type and concentrations, soil type and depth, percolation rates, wastewater application rates, and depth to groundwater. Some waste constituents may migrate through the soil column to the underlying groundwater. Groundwater monitoring is appropriate and necessary to monitor the effectiveness of treatment within the soil column and assure groundwater quality consistent with terms specified herein. OTHER 41. The State Water Resources Control Board adopted Order No. 97-03-DWQ (General Permit No. CAS000001) specifying waste discharge requirements for discharges of storm water associated with industrial activities, and requiring submittal of a Notice of Intent by all affected industrial dischargers. The wastewater treatment plant facilities are such that all stormwater runoff is collected in the stormwater pond. Because there is no storm water discharge, the Discharger is not required to obtain coverage under General Permit No. CAS000001.