Eugene/Springfield Water Pollution Control Facility 1984-1991

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Section E: RESIDUALS MANAGBMBNT FACILITIES OPERATIONS from the cannery reach the treatment and irriga- tionfacility through a 12-inch underground force main. The basic equipment consists of an aerated lagoon, irrigation pumps, control equipment, cen- terpivot irrigation systems, groundwater monitor- ing wells, and three pumping stations. SEASONAL INDUSTRIAL WASTE DISPOSAL I~ERMIT The City of Eugene has operated the Cannery Waste Management Facility under guidelines of CANNERY WASTE MANAGEMENT FACILITY DESIGN SCHEMATIC AND SPECIFICATIONS 1 storage lagoon 14 acres flow, seasonal average 0.77 mg BOD loading, seasonal average 18,9001bsJday SS loading, seasonal average 15,3001bsJday SS removal 1,080,00 lbs/yr VS content 65% VS destruction 65% seasonal duration 160 days/yr Irrigation system 4 center pivot irrigators total area irrigated 190 acres irrigation season duration 180 days Page 33 the Water Pollution Control Facilities permit is- sued by the DEQ. The permit was granted in March of 1983 and was scheduled to expire at the endof 1987. However, ithasbeenextendedindefi- nitely until the DEQ issues a renewed permit. Negotiations for the draft renewal are still under- way. At this time, the disposal site continues to operate under the terms and conditions set forth in the original Water Pollution Control Facility per- mit. The permit prevents discharge into state waters and requires all wastewater to be disposed of by land irrigation. The disposal operation must be operated to prevent prolonged ponding of waste, surface runoff, or subsurface drainage through tile. The system cannot create odors or result in vector nuisances. Irrigation practices must be conducted to prevent overloading the land with nutrients and organics. The original permit also requires the City to de- velop adetailed groundwater monitoring program. The program was developed and approved by the DEQ and has become part of the monitoring and reporting conditions of the Waste Disposal Permit. Although groundwater monitoring is required, the permit does not include maximum allowable con- centrations for any of the parameters. The new permit is expected to outline maximum allowable concentrations for most monitoring parameters. DESIGN CRITERIA AND CAPACITY The seasonal average waste flow volume is 0.77 MGD, with an average seasonal total of 108 MG during the first six years of operation. Peak and average design flows were factored into that aver- age. Seasonal average BOD loadings are 2940 mg/ 1,18,900 pounds per day, with a total of 2,646,000 pounds per season. The average season suspended solids loadings are 2382 mg/l, 15,300 pounds per day, with a total of 2,142,000 pounds per season. The capacity and design criteria for the seasonal industrial waste disposal system were planned and constructed by Brown and Caldwell. The design criteria for the transfer system and disposal site capacities were based on projected volume and waste strength loadings of seasonal waste gener- ated through the year 2000.