Specification of current sanitation discharge permit limits
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The WWTF operates under the CPDS General Permit Number COG-588000 which allows for a 30-day limit for BOD5 and TSS of 30 mg/L each. The current permit (April 2005) includes an ammonia limit of 25 mg/L but no effluent limits for total nitrogen or phosphorus. The discharge permit lists the acute low flow (IE3) of 17 cfs and the chronic low flow (30E3) of 20.5 cfs in Clear Creek at the discharge point. AT the current rated hydraulic capacity of 100,000 gpd, the dilution factor is 110 for acute low flow and 132 for the chronic low flow.