Page 28 - Section4.1.1-SWPPPCutSheet-FiltrexxSedimentControl

352 | Filtrexx ® Low Impact Design Manual | Version 8.0

up to 1/10 of the nutrient load compared to conventional hydroseeding and hydromulching. Temporary seeding should not be used in areas where concentrated fow exists or where runoff velocities will damage or undermine vegetation. For most grasses a maximum velocity of 4 CFS (0.11 CFS) or a maximum hydraulic shear stress of 2 lbs/ft 2 (10 kg/m 2 ) is recommended. In regions or seasons prone to high velocity wind conditions (such as arid regions, mountainous regions, and regions with distinct hurricane seasons) it is recommended that LockDown tm Netting is installed on top of the Temporary seeding to prevent wind erosion and movement of the Temporary seeding.

INSTALLATION

1. Temporary seeding used for temporary vegetation establishment/erosion control shallmeet Filtrexx ® Temporary Seeding Specifcations & use Filtrexx ® GrowingMedia tm .

2. Contractor is required tobe aFiltrexx ® Certifed tm Installer as determined by Filtrexx ® International, LLC (440-926-2607 or visit website at www.fltrexx.com). Certifcation shall be considered 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. Temporary seeding will be placed at locations indicated on plans as directed by the Engineer.

4. Temporary seeding shall be installed on and around unprotected and erodable soils for temporary vegetation and erosion control.

5. Temporary seeding shall be applied to 100% of the area where temporary vegetation is required.

6. Temporary seeding shall be applied at a depth of ½ to ¾ in (12-20mm) or 70 to 100 cubic yards/ ac (135-293 cubic m/ha).

7. Seed shall be thoroughly mixed with the GrowingMedia tm prior to application or surface applied with GrowingMedia tm at time of application.

8. Temporary seeding shall not be installed in areas of concentrated runoff fow.

9. Temporary seeding installed on slopes: greater than 4:1 shall be vertically tracked; greater than 3:1 shall use tackifers or slope stabilizers; greater than 2:1 shall use erosion control blankets or turf reinforcement mats.

INSPECTION and MAINTENANCE

Routine inspection should be conducted within

24 hrs of a runoff event or as designated by the regulating authority. If rilling occurs or vegetation does not establish, the area of application should be reapplied with Temporary seeding. If failure continues, the use of runoff diversion devices, compost erosion control blankets, rolled erosion control blankets, or soil stabilizers should be considered. Temporary seeding should be inspected until permanent vegetation or other erosion control practices are installed. Temporary vegetation practices should also be inspected for noxious or invasive weeds.

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

2. Temporary seeding shall be maintained until a minimum of 70% uniform cover of the applied area has been vegetated or as required by the jurisdictional agency.

3. Temporary seeding may need to be irrigated in hot and dry weather seasons, or arid and semi-arid climates to ensure vegetation establishment.

4. Temporary seeding shall be maintained until permanent vegetation is established or erosion control practices are installed.

5. Where Temporary seeding fails, rilling occurs, or vegetation does not establish, the Contractor will repair or provide an approved and functioning alternative.

6. If Temporary seeding is damaged by storm water runoff, runoff diversion devices installed above the Temporary seeding may be required.

7. Once vegetation is established, fnal seeding and/ or permanent vegetation may not be required.

8. No additional fertilizer or lime is required for vegetation establishment and maintenance.

9. No disposal is required for this product/practice.