Storm Water Pollution Prevention Plan (SWPPP)

Our Storm Water Pollution Prevention Plans include maintaining the soil erosion and sediment control Best Management Practice (BMP) as shown on Storm Water Pollution Prevention Plan (SWPPP). R. Lawson and Company will visit the community and review the soil erosion controls across the entire community and administer the necessary maintenance so that the controls operate effectively as specified by the manufacturer and as shown on the storm water management map. Abnormal rain events may require additional visits to the community. An abnormal event can best be defined as an occurrence where heavy rains (minimum of 1” of rain fall within a 24 hour period) produce sudden and rapid runoff.

R. Lawson and Company will perform services on site including walking the perimeter of the property and making sure all controls are in working order including the removal of any construction or other debris that may have accumulated. Reviewing of all the home sites under construction to ensure all the erosion and sediment control devices are installed and in good condition. Reviewing all inlets and outlets to insure control devices are in good condition. We will ensure that concrete wash out areas are clean and free of debris and check dumpsters to make sure all debris is contained and report deficiencies to Community Construction Manager.

Storm Water Maintenance Functions:

a. Silt Fence Inspection
1. Repair loose or disconnected fabric by reconnecting to the mounting stake.
2. Replace broken stakes by driving new stakes into the ground and then fasten fabric to stakes.
3. Remove silt buildup along any control device to prevent buildup from reaching 25% of the height of the control device.
4. Replace damaged cut, ripped or worn silt fence. Install new silt fence by trenching it into the ground. Installation of BMP to be per Soil and Erosion Plan, SWPPP and specifications.

b. Swales and Drainage Pathways
1. Remove silt buildup along any control device to prevent buildup from reaching 25% of the height of the control device.
2. Installation of blanket control devices will be necessary if erosion persists.

c. House Lots
1. Inspect tire cleaner on active construction lots for visible sediment penetrating through the tire cleaner. Visible sediment lack of loose stone will require additional stone to be spread across the tire cleaner (additional stone material from stockpile).
2. In the absence of silt fence installation behind the curb the subcontractor will maintain a 3” to 4” deep cut extending 3’ to 4’ behind the curb to prevent sediment from toping over the curb.
3. Install a tire cleaner mat (tracking pad) as directed. The tire cleaner will span the width of the driveway and extend up the driveway from curb depression to the garage door of the home. Stone will be not less than 6” deep and installed per SWPPP and Soils Erosion and Control Plan.
4. Install silt fence protection along adjoining homes sites as directed.

d. Inlet Protection
1. Clean silt sacks to prevent sediment buildup from reaching 25% full.
2. Remove accumulation of sediment around the inlet
3. Remove sediment buildup at inlet sediment control device along swales and drainage paths to prevent sediment buildup from reaching 25% of the height of the control device.
4. Clean other inlet protection devices to prevent sediment buildup from reaching 25% of the height of the control device.

e. Roadways and Other Paved Surfaces
1. Remove sediment accumulation along the curb line and at other low area with in the paved surface.
2. Broom sweep all paved surfaces in order to remove all sediment that has been tracked out onto the surfaces by typical construction activity.

f. Concrete Washout Areas
1. Clean up all miscellaneous concrete washout debris and properly dispose in designated area.
2. Shovel any minor spills into the wash-out container.

g. Controls at Slopes and along the Site Perimeter
1. Rake rills and stabilize with seed and straw mulch and tack.
2. Fill and re-grade gullies and stabilize with seed and straw mulch and tack.
3. If slope erosion persists install blanket controls.

h. Site Perimeter and Open Areas
1. Remove miscellaneous debris from the woods, site perimeter and open spaces; place in designated area.

i. Site clean up
1. Place all loose and blown trash into the refuse container.
2. Return displaced refuse found around the container back into the containers.

j. Additional site visit as required by storm event.
1. Inspect the perimeter of the property and ensure all controls are in working order including the removal of any construction or other debris that may have accumulated.
2. Review of all the home sites under construction to ensure all the erosion and sediment control devices are installed and in good condition.
3. Review all inlets and outlets to insure control devices are in good condition.
4. Make sure concrete wash out areas are clean and free of debris. Report deficiencies to Community Construction Manager.
5. Check dumpsters make sure all debris is contained. Report deficiencies to Community Construction Manager.

Sediment Control

Silt Fence controls sediment runoff from construction sites where the soil has been disturbed. Silt fence stops the water containing the sediment long enough for the sediment to drop out, while the water passes through the fabric. Silt fence is available in light to medium strength woven fabrics, with various stake spacing.

Inlet Protection

Silt Sack is a sediment control device used during construction that mounts under the grate in catch basins. Silt Sack is made of a permeable geotextile that allows water to pass but prevents silt and sediment from clogging the drain system.

DEFINTIION OF TERMS
1. Annual species of vegetation – They grow one year, seed out and then die. The root system is minimal since they are not alive long. The seeds may come back but you cannot count on that. They are considered temporary cover.
2. BMP – Best Management Practice. Any measure, device or practice used to reduce or eliminate the amount of erosion or sediment release from a construction site.
3. Detention Basin – Pond that detains the water for a designated time frame and allows for a slow release over time. During non-storm events, these ponds are dry and should be well vegetated.
4. Erosion – The process by which soil particles are dislodged by water or wind.
5. Gully Erosion – These are deep channels formed from concentrated storm water flow. They cannot be removed or filled with simple plowing techniques.
6. Perennial species – They grow, establish and spread. They have an extensive root system that maintains their existence. They come back each year and are considered permanent.
7. Retention Basin – Ponds that hold or retain water. They are designed for post construction storm water management but can be used as a sediment basin during construction. If so, they must be designed for a specific amount of sediment storage and cleaned out when necessary and after the construction project is complete.
8. Rill Erosion – Created when shallow sheet flow concentrates in low areas and creates shallow grooves or channels of concentrated flow. Rills are only deep enough that they can be removed or filled by plowing the area.
9. Sheet Erosion – Caused by shallow flowing water over the surface of the soil.
10. Swale – Ditch or channel with concentrated flows.
11. SWPPP – Storm Water Pollution Prevention Plan designed to treat storm water runoff from a construction site.
12. Weir – A small rock dam used to direct water flow

Street Sweeping
SWPP
Paradigm Punch Lists

For more informatiion, please call (732) 269-3576