No. Typically two members of a team go in the stream to take temperature readings, fetch the sample and possibly do stream flow measurements. Other members of the team perform the tests at stream-side in nice weather or go to a covered area in inclement weather. In the spring and fall our teams perform a biosurvey in their streams. This means stirring up a square meter (3 times in different locations), capturing the macroinvertebrates (eg. Mayflies, caddisflies, etc) in a net, identifying, counting and recording the various species. Usually, two or three team members will collect the macros in the stream and bring the net to stream-side for identification by the group.