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Phase II of EPA's National Pollution Discharge Elimination System (NPDES) requires all but the smallest municipal and industrial storm sewer systems to treat stormwater discharge to the "maximum extent practicable". The Storm--PURE™ catch basin insert, a two-stage unit that will fit into new or existing catch basins, stands apart from competitive units in its ability to remove suspended solids, hydrocarbons and other pollutants. The upper section consists of a perforated metal catch basket covered by a geotextile filter bag. This assembly captures sediment and debris while allowing filtered water to pass freely down through the center cone. The lower stage contains a patented Mycelx® filter insert that attracts and holds tiny particles of hydrocarbons and oil-bound pollutants. The specially treated absorbent material instantly bonds to contaminated particles, resulting in a 99% removal rate of total petroleum hydrocarbons. Both stages are housed in a corrosion-resistant high density polyethylene body with overflow slots at the top to act as a bypass in unusually high flow conditions. The complete assembly will pass 230 gpm without bypassing the flow. |
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Storm-PURE™ Catch Basin Inserts |
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Pollution Removal Performance Tests (Third Party Test Results Obtained At 120 gpm Flowrate) |
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Do Your Catch Basins Look Like This During The First Flush Of A Rain Event?
Storm-PURE™ Catch Basin Inserts With MYCELX Hydrocarbon Extraction Filter Is The Answer. |
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Storm-PURE™ Catch Basin Inserts are easily adapted to most existing catch drain basins with our adaptor kit which features a telescoping galvanized steel support frame and HDPE transition plate. |

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Newly Installed Unit |


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Working Unit |






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Component |
Unit |
Influent |
Effluent |
% Removal |
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Total Petroleum Hydrocarbons |
mg/l |
96.9 |
BRL |
99.90% |
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Total Suspended Solids (TSS) |
mg/l |
36 |
11 |
69.44% |
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Chemical Oxygen Demand (COD) |
mg/l |
156 |
BRL |
94.23% |
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Copper |
µg/L |
86.2 |
11.5 |
86.60% |
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Iron |
µg/L |
1490 |
362 |
75.70% |
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Lead |
µg/L |
1110 |
106 |
90.45% |
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Zinc |
µg/L |
6060 |
286 |
95.28% |