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P f <br /> NSF lnternatlonal <br /> Standard 40 - Individual Wastewater Treatment Plants <br /> Stress Test Evaluation <br /> Week Beginning: March 7. 1993_ Plant Code: 4/108 <br /> Weeks Into Test. 20 f <br /> ---Sunday- --Monday €.Tuesday Wednesday---Thursday-—Friday— __Saturday-- - <br /> Dosed Volume (gallons) 450 450 1 450 450 295 0 399 <br /> Y <br /> Dissolved aeration 2.2 2.5 1.8 2.1 1.9 <br /> Oxygen chamber <br /> (mg/L) effluent 4.6 2.72.9 y 4.8 4.9 <br /> influent 11 12 12 12 11 <br /> Temperature. aeration 14 13 14 14 14 <br /> (°C) chamber <br /> effluent 7 10 9 5 11 <br /> influent T.4 7.6 7.5 7.4 7.6 <br /> # I' <br /> pH aeration 7.4 7.5 7.5 7.5 7.6 <br /> chamber <br /> d <br /> effluent 7.5 7.6 1 7.6 7.6 7.7 <br /> Biochemical influent 190 190 I 180 150 140 <br /> Oxygen Demand j <br /> (mg/L) effluent <5 <5 <5 <5 <5 <br /> influent 170 180 160 180 150 <br /> Suspended <br /> aeration <br /> Solids chamber <5 - 10 •� 13 6 6 <br /> (mWWL) r <br /> effluent 5 7 7 5 8 <br /> influent 140 150130 ;; 150 130 <br /> Volatile <br /> Suspended aeration <5 7 6 <5 <5 <br /> Solids chamber <br /> (m9/L) effluent <5 <5 <5 _; <5 6 <br /> 45 Minute <br /> Settleable aeration <5 <5 <5 <5 <5 <br /> Solids chamber <br /> (mUL) <br /> -_._(.1)-.Site_probieni_ _.__ __ -- ._-.- -__-: ..Notes:_Power_failure_stress-started_on_3/11.__ <br /> (2) Malfunction of system under test <br /> (3) Weather problem <br /> (4)Other <br /> wk f� <br /> TGS/3-92 <br /> G20 <br />'s <br />