Apparatus and method for treating storm water runoff

  • US 5,707,527 A
  • Filed: 04/30/1996
  • Issued: 01/13/1998
  • Est. Priority Date: 04/30/1996
  • Status: Expired due to Term
First Claim
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1. A method of treating storm water runoff, the method comprising:

  • (a) allowing the runoff water to infiltrate through a water-permeable outer surrounding wall of a basket containing a bed comprising material able to remove pollutants from the storm water;

    (b) treating the runoff water by removing pollutants from the storm water by passing the storm water through the bed contained within the basket to an interior drainage space;

    (c) establishing continuous fluid communication between the interior drainage space of the basket and a treated water outlet conduit;

    (d) siphoning treated water from the drainage space under gravity into the treated water outlet conduit; and

    (e) controlling a flow rate of the storm water through the basket to a lower rate than an initial infiltration capacity of the bed, the controlled lower rate allowing sufficient contact between the storm water runoff and the bed to remove a substantial proportion of at least one pollutant from the storm water runoff.

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