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This treatment unit is designed to remove coarse rags, trash and debris. After
being screened, the wastewater flows into a "Grit Collector" where the forward velocity
is reduced to less than 1 foot per second so that sand, rocks, and gravel will
settle out. All materials removed via these pretreatment devices are
mechanically washed, separated, and then delivered to the Gallatin County
landfill for disposal.
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