Resolution No. 4793 - Laserfiche WebLink

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5.0 Basis of Planning 5.1 Basts for Design 5,1.1 Existing Regulator] Requirements The WPCF discharges to the Willamette River at river mile 178. The discharge is permitted under an NPDES permit issued by the DEQ. DEQ issued a renewed NPDES permit for the WPCF in May 2002. The previous permit expired in 1997, and the current NPDES perrrdt (No. 102486) expires December 31, 2006. The discharge limitat/ons and requirements for the WPCF's current NI~DES permit are summarized in Table 5.1.1-1. These discharge l'mxitations and requffements are defined for three categories of wastewater sources: Treated effluent: ouffall 001 [diffuser and Ouffal100lA (ban~k ouffall)] 2.Recla/med water: ouffall 101 (Level II) and ouffall 102 (Level III) 3.Emergency SSOs: ouffalls 002 to 014 TABLE 5.1.1-1 Existing NPDES D~scharge Requirements and bmitations for the WPCF MWMC Facilities Plan, Eugene-Springfield (1) Treated Effluent Outfall 001 and 001A (No discharge from Out[all 001A from May 22 through October 31 unless approved by the DEQ) May t - October 31: Average Effluent Monthly1 Weekly~ Daily~ Concentrations Average Average Maximum Parameter Monthly Weekly (lb/day) (~b/day) (lbs) CBOD5 10 mg/L 15 m~L 4,100 6,100 8,200 TSS 10 mg/L 15 mg/L 4,100 6,100 8,200 November 1 - April 30: Average Effluent I~onthly~ Weekly~ Daily1 Concentrations Average Average Maximum Parameter Monthly Weekly (lb/day) (lb/day) (lbs) CBODs 25 mg/L 40 mg/L 16,000 24,000 32,000 TSS 30 mg/L 45 mg/L 19,000 28,000 38,000 Year Round: Parameter Limitations E. co# Bacteda Shall not exceed 126 organisms per 100 mL monthly geometric mean. No single sample sha~l exceed 406 organisms per 100 mL. pH Shall be within the range of 6.0 - 9.0