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3 y <br /> NSF International <br /> Standard 40 --Individual Wastewater Treatment Plants <br /> " I <br /> Week Beginning: February 7, 1993 JY I - Plant Code: 41108 <br /> Weeks Into Test: 16 + <br /> Weekend Dosing. Sunday- 450 allonsi�Saturday 450 gallons <br /> --- -- Monday_---- - Tuesday Wednesday --Thursday—' Friday <br /> Dosed Volume (gallons) 450450 450 450 450 <br /> Dissolved aeration i.9 .2.2 0.9 2.7 2.3 <br /> Oxygen chamber <br /> P9/L) effluent 3.1 { 3.4 4.8 4.5. 5.0 <br /> influent 11 ! 1 i 11 i 1 11 <br /> aeration <br /> Temperature cher 13 E' 114 13 14 14 <br /> CC) <br /> effluent 7 5 14 5 7 <br /> influent 7.5 4 ! 7.5 7.5 7.5 7.5 <br /> aeration <br /> pH chamber 7.6 7.5 7.6 7.6 7.6 <br /> effluent 7.8,.1,' 1 7.9 7.9 7.8 7.8 <br /> Biochemical influent 180 160 180 170 200 <br /> Oxygen Demand <br /> (mg/L) effluent <5 <5 <5 <5 <5 <br /> influent 180, ! 190 220 200 250 <br /> Suspended <br /> Solids aeration <5l <5 8 <5 <5 <br /> (mg/L) chamber <br /> effluent <br /> <5 <5 <5 <5 <5 <br /> , <br /> influent 160. 1:160 190 170 200 <br /> Volatile <br /> Suspended aeration <5 . <5 7 <5 <5 <br /> Solids chamber <br /> (M91L) effluent <5,� <5 <5 <5 <5 <br /> 45 Minute =' <br /> Settleable aeration f <br /> . �<5 c5 <br /> <5 <5 <5 <br /> t <br /> Solids chamber <br /> (mUL) <br /> (1) Site problem t7- <br /> (2) <br /> -(2) Malfunction of system under test <br /> (3)Weather problem <br /> (4)Other <br /> TGSn-92 I <br /> C6 <br />