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Construction Activities | Section 1: Erosion & Sediment Control | 327

PURPOSE & DESCRIPTION

Filtrexx ® Inlet protection is a three-dimensional tubular sediment control and storm water runoff fltration device typically used for storm drain inlet protection of sediment and soluble pollutants (such as phosphorus and petroleum hydrocarbons) on and around construction activities.

APPLICATION

Drain inlets are located in areas that receive runoff from surrounding lands, often exposed and disturbed soils, and are located at a low point, or in a sump. Inlet protection used around drain inlets (or Drain Inlet protection) should completely enclose the circumference of the drain and where possible should not be placed on a grade or slope. Inlet protection used around drain inlets should never be the only form of site sediment control and should be accompanied by erosion control/slope stabilization practices, such as Slope protection or rolled erosion control blankets (RECB). Inlet protection should never be placed where they divert runoff fow from the drain inlet, or on top of the inlet, which can cause fooding. Under high runoff and sediment loading conditions placement of 1-2 in (25-50 mm) diameter rock (AASHTO #2) may be placed around the outer circumference of the Inlet protection up to ½ the height of the Inlet protection. This will slow runoff velocity as it contacts the Inlet protection and will reduce sediment build-up and clogging of the Inlet protection.

Curb inlets are generally located on paved surfaces and are designed to rapidly drain storm runoff from roadways to prevent fooding that poses a hazard to vehicular traffc. Inlet protection devices should be placed in a manner which intercepts runoff prior to entering the inlet, but does not block or divert runoff from the inlet. To prevent diversion of runoff, Inlet protection used around curbs (or Curb

Filtrexx ® Inlet

Protection

Sediment & Perimeter Control Technology

Inlet protection) should be used in low points, or sumps, and minor slopes or grades. Inlet protection should never be placed in or on the curb inlet drain, or placed in a manner than obstructs vehicular traffc. Inlet protection height should be at least 1 in (25 mm) lower than top of curb inlet to allow for overfow into the drain and not over the curb. Maximum sediment removal effciency occurs when minor ponding exists behind Inlet protection but should never lead to fooding.

Curb sediment containment systems

are used to reduce the sediment and pollutant load fowing to a curb inlet. They are generally placed on paved surfaces perpendicular to runoff fow and should be lower than the height of the curb. Curb sediment containment systems should never cause fooding or placed where they are a hazard to vehicular traffc. Inlet protection used for curb sediment containment (or Curb Sediment Containment Inlet protection) can be placed on a grade but should never be placed directly upslope from curb inlet where it may inadvertently divert runoff from entering curb inlet.

INSTALLATION

1. Inlet protection used for inlet protection to reduce sediment and soluble pollutants entering storm drains shall meet Filtrexx ® FilterSoxx tm Material Specifcations and use Certifed Filtrexx ® FilterMedia tm .

2. Contractor is required to be a Filtrexx ® Certifed tm Installer as determined by Filtrexx ® International, LLC (440-926-2607 or visit web site at Filtrexx.com). Certifcation shall be considered current if appropriate identifcation is shown during time of bid or at time of application (current list of installers can be found at www.fltrexx.com). Look for the Filtrexx ® Certifed tm Installer Seal.

Section 1: Erosion & Sediment Control – Construction Activities

SWPPP Cut Sheet: