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NSF International <br /> Standard 40 = Individual Wastewater Treatment Plants <br /> Week Beginning: _ January 10, 1993 Plant Code. 4(108 <br /> Weeks Into Test: 12 <br /> Weekend Dosing: Sunday- 450 oallons Saturday.- 450 gallons <br /> — - -- _ --- ---- - - --------Monday------------Tuesday Wednesday Thursday--- —Friday-- <br /> Dosed Volume (gallons) 450 405 248 450 450 <br /> Dissolved aeration <br /> Oxygen chamber 2.5 jj 2.3 1.3 27 2.0 <br /> (m91L) effluent 4.7� E1' .4.2 4.5 6.5 4.3 <br /> F' <br /> influent 12 13 12 12 12 <br /> Temperature aeration 14 ii; 15 14 14 15 <br /> {°C) <br /> chamber 3 <br /> effluent 5 14 11 8 9 <br /> 1 influent 7.5 ; 7.5 " 7.5 7.4 7.5 <br /> aeration chamber <br /> pH 7.5 7.7 7.7 7.8 7.8 <br /> effluent 8.0 7.9 8.0 8.0 7.9 <br /> Biochemical influent 120 110 110 130 140 <br /> Oxygen Demand 3 <br /> (mg/L) effluent <5 <5 <5 <5 <5 <br /> influent 140 130 160 150 160 <br /> Suspended , a <br /> aeration <br /> Solids chamber 64 ! <5 <5 <5 <5 <br /> P910 <br /> effluent <5 c5 <5 <5 <5 <br /> influent 120 110 140 130 140 <br /> Volatile <br /> Suspended aeration <5 <5 <5 <5 <5 <br /> Solids chamber <br /> (mg/L) effluent <5. �: <5 <5 <5 <5 <br /> 45 Minute <br /> Settleable aeration <5 ,i <5 <5 <5 c5 <br /> Solids chamber <br /> (mUL) €a ' <br /> f <br /> (-l)-Site-problem - - _.-._= _. _. .Notes: Low-doses-on 1112due.to.power failure from.ice.storm. Low . <br /> {2) Malfunction of system under test " doses on 1/13 caused by problem with float in dosing system- <br /> (3)Weather problem <br /> (4) Other <br /> TGS/3-92 13 <br /> C_I2 <br />