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<br />I <br />I <br />I <br />!I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE V-2 <br /> <br />PACKAGE WATER TREATMENT PLANT <br />HYDRAULIC DESIGN CRITERIA <br /> <br />Description <br /> <br />Flash Mix <br /> <br />Type <br />Detention time <br /> <br />Flocculation <br /> <br />Type <br /> <br />Detention time <br /> <br />Sedimentation Basin (if <br />conventional process) <br /> <br />Type <br /> <br />Detention time <br />Tube settlers <br />Surface loading rate <br />Weir loading rate <br /> <br />Fi 1 ters <br /> <br />Type <br />Filtration rate <br />Backwash rate <br />Surface wash <br />Surface wash rate <br />Sand depth <br />Sand effective size <br />Sand uniformity coefficient <br />Anthracite coal depth <br />Coal effective size <br />Coal uniformity coefficient <br /> <br />Units <br /> <br />Min <br /> <br />Min <br /> <br />Min <br /> <br />gpd/ft2 <br />gpd/ft <br /> <br />- 2 <br />gpm/ft2 <br />gpm/ft <br />type 2 <br />gpm/ft <br />in <br />rrm <br />uc <br />in <br />rrm <br />uc <br /> <br />V-6 <br /> <br />Design Criteria <br /> <br />Hydraulic Mixing <br />4 <br /> <br />Vertical shaft <br />fl occul ator <br />12 <br /> <br />Horizontal w/tube <br />settlers <br />32 <br />60 degree type <br />1500 <br />5000 <br /> <br />Dual media <br />4 <br />15 <br />Fixed jet <br />1.5 <br />11 <br />0.45-0.55 <br />< 1.6 <br />24 <br />0.9-1.2 <br />(. 1.2 <br />