Section 1 Installation
1-13
eddy or at the edge of flow. Its depth in the
stream can also be important. An intake placed
at the bottom of the stream may result in
excess heavy solids, while placement at the top
may result in the opposite.
The suction line should always be cut to the
shortest possible length. Route the suction line
so that it runs continuously downhill. Loops of
coiled suction line or low areas where the liquid
can pool will hold residual amounts of liquid
that will cross-contaminate sample volumes.
The suction line will tend to float when
sampling from deep flow streams. Refer to
Table 1-1. If the depths listed in the chart are
exceeded, anchor the line securely so that the
suction line and strainer do not become
dislodged.
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