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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0121 -3- <br /> FOR FORWARD INC. <br /> AUSTIN ROAD LANDFILL <br /> CLASS III LANDFILL <br /> SAN JOAQUIN COUNTY <br /> 13. The ground water contaminant plume beneath the site occurs in the Victor Formation and . <br /> flows northeasterly toward the Stockton pumping depression. The ground water flow <br /> velocity ranged from 8 to 130 feet per year in 1995. <br /> 14. Beneficial uses of ground water are domestic, municipal, and agricultural. <br /> 15. The facility receives an average of 14.22 inches of precipitation per year as measured at <br /> Austin Road Landfill between the years 1976 and 1986. <br /> 16. The 100-year, 24-hour precipitation event for the site is 3.65 inches. <br /> 17. Surface drainage is to the North Fork of South Littlejohns Creek. Surface runoff from the <br /> waste unit is routed to the sedimentation pond at the west end of the site, as shown on <br /> Attachment B. <br /> 18. The beneficial uses of the North Fork of South Littlejohn Creek listed in Sacramento <br /> River and San Joaquin River Basin Plan(Fourth Edition) are municipal and domestic <br /> water supply; irrigation; stock watering; industrial process and power; contact recreation; <br /> non-contact recreation; warm and cold freshwater fish habitat; warm water species fishing <br /> spawning; and wildlife habitat. <br /> OPERATION OF FACILITIES <br /> 19. The Austin Road facility currently accepts municipal solid waste on an intermittent basis <br /> as equipment and personnel from the Forward facility become available. Waste will be <br /> discharged prior to closure in selected areas to bring the landfill surface up to grade and <br /> allow proper storm water drainage. <br /> CORRECTIVE ACTION <br /> 20. Significant VOC impacts to groundwater downgradient of the facility were first detected <br /> in 1989. By 1991 evaluation monitoring determined that chlorinated hydrocarbon <br /> impacts extended as far as 1,000 feet downgradient of the landfill. A corrective action <br /> plan was approved for implementation in August 1991. The plan consists of a load <br /> checking program; extraction and treatment of impacted groundwater from two wells; and <br /> continued monitoring of the effectiveness of corrective action. The discharge of treated <br /> water to the north branch of the south fork of Littlejohns Creek is regulated under a <br /> separate Waste Discharge Requirements and NPDES permit. <br />