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The length of the entrance tank (L.Et) includes the length of the grit chamber, and equals the length of the sedimentation tank. The width of the entrance tank (W.Et) equals the length of the floc channel.
Grit Chamber
The grit chamber is contained within the entrance tank. A concrete barrier will be built to give the grit chamber a length that satisfies the upward velocity constraint previously mentioned. Note that the width of the entrance tank is defined to be the same width as a floc channel.
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