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TABLE 7.2.1-1 <br />Liquid Processes Design Criteria, Existing and 2025 Capacity Needs <br />MWMC Facilities P/an, Eugene-Springfield <br /> <br /> Unit Process Existing Criteria/Conditions Year 2025 <br /> <br />Minimum 1.76 mg/L NA <br />Chlorine Usage <br />Average 26.9 lb/day NA <br />Maximum 33.6 lb/day NA <br />Minimum 14.6 lb/day NA <br />Chlorine Storage <br /> Ton Cylinders On-Site (Assumed) NA <br /> Number of Cylinders Used During Max NA <br /> Week <br /> Storage Capacity at Max. Week <br /> :~ NA <br />Hypochlorite and Bisulfite Storage and Conveyance <br /> <br />Number of Hypochlorite Tanks NA 3 <br />Hypochlorite Tank Capacity, each/Total NA 20,000 gal / 60,000 gal <br />Number of Bisulfite Tanks NA 1 <br />Bisulfite Tank Capacity, each/Total NA 7,000 gal <br />Storage Criteria <br />Average Annual NA 30 day <br />Maximum Month NA 14 day <br />Maximum Week NA 6 day <br />Hypochlorite Disinfection (secondary treatment flow stream) <br /> <br />Number of Contact Tanks NA 4 <br />Volume, ea (ft3) NA 132,700 ft3 <br />Design Criteda NA 35 minutes @ QwwPu <br />Hypochlorite Solution Strength NA 12.50% <br />Number of Hypochlorite Pumps for Secondary NA 5 <br />Treatment Flow <br />Hypochlorite Usage <br />Average Dose NA .3.5 mg/L <br />Average @ WWMM NA 3,255 gal/day <br />Bisulfite Dechlorination (secondary treatment flow stream) <br /> <br />Solution Strength (assumed) NA 38% <br />Chlorine Residual (assumed) NA ~:~ <br />Number of Bisulfite Pumps for Secondary NA 2 <br />Treatment Flow <br />Bisulfite Usage <br />Average Dose NA 1.1 mg/L <br />Average @ WWMM NA 14 <br />Hypochlorite Disinfection (primary diversion flow stream) <br /> <br />Number of Contact Basins NA <br />Volume, ea (ft3) NA 1.3 Mgal (basins) <br /> 0.6 Mgal (pipeline) <br />Design Criteria NA 20 minutes @ QWWPH <br />Hypochlorite Solution Strength NA 12.50% <br /> <br />MWMC_TAB LE 7.2.1-1 _REV7.DOC 6 <br /> <br /> <br />