Page 19 - Section4.1.1-SWPPPCutSheet-FiltrexxSedimentControl

342 | Filtrexx ® Low Impact Design Manual | Version 8.0

current if appropriate identifcation is shown during time of bid or at time of application (current list can be found at www.fltrexx.com). Look for the Filtrexx ® Certifed tm Installer Seal.

3. Slope interruption will be placed at locations indicated on plans as directed by the Engineer. Slope interruption shall be installed horizontally, along the contours of slopes, and perpendicular to sheet runoff fow.

4. Stakes shall be installed through the middle of the Slope interruption on 10 ft (3m) centers, using 2 in (50mm) by 2 in (50mm) by 3 ft (1m) wooden stakes.

5. Staking depth for sand and silt loam soils shall be 12 in (300mm), and 8 in (200mm) for clay soils.

6. Loose FilterMedia tm may be backflled along the upslope side of the Slope Interruption Soxx tm , flling the seam between the soil surface and the device, improving fltration and sediment retention.

7. If the Slope interruption is to be left as a permanent flter or part of the natural landscape, it may be seeded at time of installation for establishment of permanent vegetation. The Engineer will specify seed requirements.

INSPECTION and MAINTENANCE

Routine inspection should be conducted within 24 hrs of a runoff event or as designated by the regulating authority. Slope interruption should be regularly inspected to make sure they maintain their shape and are producing adequate hydraulic fow-through. If ponding becomes excessive, additional Slope interruption may be required to reduce effective slope length or sediment removal may be necessary. It is acceptable for runoff to breach the Slope interruption during runoff events. Slope interruption shall be inspected until the hill slope has been permanently stabilized and construction activity has ceased

1. The Contractor shall maintain the Slope interruption in a functional condition at all times and it shall be routinely inspected.

2. If the Slope interruption has been damaged, it shall be repaired, or replaced if beyond repair.

3. The Contractor shall remove sediment at the base of the upslope side of the Slope interruption when accumulation has reached 1/2 of the effective height of the Soxx tm , or as directed by the Engineer.

4. Slope interruption shall be maintained

until the hill slope has been permanently stabilized and construction activity has ceased.

5. The FilterMedia tm will be dispersed on site once disturbed area has been permanently stabilized, construction activity has ceased, or as determined by the Engineer.

For long-term sediment and pollution control applications, Slope interruption can be seeded at the time of installation to create a permanent runoff velocity control and vegetative fltering system for sediment and soluble pollutants (contained vegetative flter strip). These devices will remain intact at the end of construction activity. The appropriate seed mix shall be determined by the Engineer.