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Underwater Core Sampling, Filter Bed and Underdrain Inspections

Conventional or biologically activated carbon contractor filter beds to verify GAC practical size

  • Using 4’ or 8’ extraction tubes, carbon media samples can “for the first time” effectively be retained for inspection and assessment at different elevations throughout a filter bed.

Underdrain inspections are important to verify the filter bed-drainage BLOCKS and the underdrain conduit structures are intact and structurally sound.

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