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* The same five pollutants was well-tried for at all sites * The colourise change for each was the same Manipulated variables * divers(prenominal) sites * Different people doing the tests * Time limit for each pollutant * sample distribution time for each gas was contrasting * Strokes for gas was different as well Responded variables * submerging of gas * Movement of colour in tube Method of Data collection * key sites was chosen * Spots to do test was chosen * solo one test of each was don! e because tubes were expensive * pull both conclusions of a reinvigorated detection tube exploitation the tip-breaker on the side of the pump * install the tube cursor towards the pump * Select the volume desire and ordain the cerise dust on the plunger with the red dot on the pump shaft. * Pull the handle sharply until it locks (50-100ml). cargo down for the sampling time indicated on the data sheet to have the air to be drawn through the tube. (2mins) * Flow is everlasting(a) when the end on flow...If you want to get a honest essay, order it on our website: OrderCustomPaper.com
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