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Shared sewer plant’s BOD limits prompt caution as council considers industrial tenant
Summary
Willard officials heard technical testimony that a proposed food-processing user could exceed local sewer-plant biological-oxygen-demand (BOD) capacity despite acceptable flow rates, prompting discussion of pretreatment, metering and equitable load accounting before approving new hookups.
Willard, UT — Technical testimony at Monday’s council meeting flagged biological oxygen demand (BOD) — not hydraulic flow — as the primary limit at the joint wastewater-treatment plant that serves Willard and neighboring jurisdictions.
A sewer-plant representative (S5) told the council the plant can hydraulically accept the volumetric flow proposed by an engineering firm representing a potential food-processing company, but the facility’s biological system lacks the microorganism concentration and detention capacity to treat the company’s high-strength waste without pretreatment or plant expansion. "Hydraulically, we could handle it," the representative said, "but the BOD loading of this proposed business could be more than triple current BOD and would limit residential growth or other small businesses without expansion or pretreatment." (S5)
S5 reported Phase 1 plant design capacity at roughly 2,000,000 gallons per day, with current treatment around 700,000 gpd because the plant is operating about half of Phase 1. The rep explained pretreatment options and surcharges as alternatives to immediate plant construction; the company, S5 said, declined to invest in pretreatment and instead explored paying a surcharge to the plant.
Council members (S1, S11) pressed whether Willard’s share of nutrient loading is proportionate to its ownership share of the plant (historically discussed as a 30% figure). S5 said the operation currently monitors flow and can implement additional testing for constituent loads, and the board (S11) said the board could consider metering and separate testing to ensure equitable allocation between partner cities.
What’s next: The council asked sewer-board members to pursue additional metering and testing options, consider surcharge mechanisms for high-load industrial users, and report back to the council. The board also invited residents to attend its regular third-Tuesday meetings at the plant for further transparency.
Attribution: Technical details and direct quotes come from the sewer-plant representative and council members during the meeting transcript.
