Standard Methods for the Examination of Water and …
an electric vacuum pump, a filter pump operating on water pressure , a hand aspirator, or other means of securing a pressure differential (138 to 207 kPa). Connect a flask of approximately the ... with a rated pore diameter such that there is complete retention of coliform bacteria. Use only those filter membranes that have been found, through ...
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Water Control Structures Recommended Practices
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12 Angry Men online text - Home | UMass Amherst
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