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F3 <br /> µ <br /> F NSF International <br /> Standard 40 - Individual:Wastewater Treatment Plants <br /> 4 Stress Test Evaluatlon <br /> Week Beginning: Feburary 21 1993 Plant Code: 4 108 <br /> Weeks Into Test: 18 <br /> - Sunday,� Monday r--Tuesday=-Wednesday -Thursday--Friday-Saturday- <br /> Dosed Volume (gallons) 450 450 4 450 450 450 469 405 <br /> Dissolved aeration <br /> 2.0 . 1.5 1.7 1.5 1.4 2.0 1.8 <br /> Oxygen a chamber <br /> L s <br /> ( � effluent 5.1 3.5 I 3.4 4.4 4.3 4.6 4.7 <br /> influent 11 12 Ii 12 12 12 11 11 <br /> Temperature aeration 14 14 14 „ 14 13 14 13 <br /> {°C) chamber <br /> effluent 6 5 5 4 8 5 5 <br /> � I <br /> L influent 7.5 LL ' 7.4 7.5 ' 7.5 7.4 7.5 7.5 <br /> aeration <br /> pH 7.5 7.5 7.5 7.6 7.4 7.5 7.4 <br /> chamber <br /> effluent 7.9 7.8 7.8 7.8 7.8 7.7 7.8 <br /> Biochemical influent 170 200 170 190 210 170 200 <br /> Oxygen Demand <br /> (mg/L) effluent <5 <5 � <5 <5 <5 <5 <5 <br /> influent 190 O 190 Ir 190 210 200 180 780 <br /> Suspended r <br /> aeration 1 10 <br /> Solids 8 T 7 <br /> <5 13 r T <br /> (mg/L) chamber k <br /> effluent <5 <5 �h <5 <5 <5 <5 <5 <br /> influent 170 160 160 180 170 150 160 <br /> Volatile <br /> Suspended aeration!� i <5 10 � <5 8 5 6 5 <br /> Solids chamber � <br /> (mg/L) effluent <5 <5 ! <5 <5 <5 <5 <5 <br /> 45 Minute <br /> Settleable aeration <br /> c$ c5 �� <5 <$ c5 <5 <Jr. <br /> Solids chamber <br /> (m1JL) <br /> 0)-Site prob --Motes- <br /> (2) <br /> _N <br /> lem otes <br /> _�..._ �„ � <br /> (2) Malfunction of system ander test <br /> (3) Weather problem E o <br /> (4) Other <br /> Ir �� <br /> TGS13-42 <br /> C;.18 <br /> 1. <br />