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WASTE DISCHARGE REQUIREMEMTS ORDER NO. -5- CITY OF ESCALON ESCALON WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY samples which were collected from April 1997 to January 2000, average characterization of the water quality is: Well Electrical Conductivity Nitrate (as nitrate) W-1 780 mg/1 5.4 mg/1' W-2 566.7 mg/1 20.8 mg/1 W-3 785 mg/1 43.1 mg/1 Data from Discharger's self-monitoring reports. 1 Analytical detection limit used to calculate average value. 21. Based on the groundwater monitoring performed at the site, groundwater exists approximately 37 feet below ground surface. Groundwater flows to the west-southwest, generally parallel with the flow of surface water in the Stanislaus River. 22. In order to determine compliance with the groundwater and surface water limitations contained herein, these WDRs contain a time schedule for preparation of a groundwater evaluation report. 23. Objectionable odor complaints related to the facility were documented in October 1996, November 1997, and September 1999. All the complaints were related to the industrial wastewater system. 24. The WWTP is on the north side of the Stanislaus River. Surrounding land uses are primarily agricultural. A golf country club and private residences exist south of the Stanislaus River. 25. The Board adopted a Water Quality Control Plan, Fourth Edition, for the Sacramento River and San Joaquin River Basins (hereafter Basin Plan), which designates beneficial uses and water quality objectives for waters of the Basins. These requirements implement the Basin Plan. 26. The site lies within the San Joaquin Valley Floor Hydrologic Unit No. 535.10, as depicted on interagency hydrologic maps prepared by the Department of Water Resources in August 1986. 27. Surface water drainage is to the Stanislaus River. The beneficial uses of the Stanislaus River are municipal, agricultural water supply for irrigation and stock watering; contact recreation, canoeing, and non-contact recreation; warm and cold freshwater habitat; cold water migration; warm and cold water spawning; and wildlife habitat. The potential beneficial uses of the Stanislaus River are municipal and domestic water supply. 28. The beneficial uses of the underlying groundwater are municipal, domestic, and industrial supply. 29. The Board has considered anti-degradation pursuant to State Board Resolution No 68-16 and finds that not enough data exists to determine whether this discharge is consistent with those provisions. Therefore, this Order provides a timeline for data collection to determine