MODULE 3 NONSTANDARD ESC PRACTICES What is the
- Slides: 80
MODULE 3. NON-STANDARD ESC PRACTICES
What is the plan for this module? Review and talk about the non-standard practices out there: 1. The adaptations of and to the current ESCH practices 2. Natural and biological practices 3. The more mechanical practices 4. Chemical practices Also include what surrounding States are doing/ allowing.
So, why use Non-Standard Practices? Reason Yes Green Book is outdated Used it elsewhere Left overs Small site Redevelopment Discharge issues Spaghetti Good sales man x x No x x x
The site is small • The practice (i. e. , sediment trap or basin) does not fit is there an alternative? • By using a standard practice we are taking up too much room
There may not be a standard drainage way to discharge into • The site is landlocked and only drains to stormwater utility • There is no real drainage way nearby to discharge into • It is a smaller (isolated) project on a large property, but it still needs permitting
This is a redevelopment project • • What is underneath? What are we disturbing? Can we place silt fence on asphalt? Do we have the space?
There a lot of issues underground • (or on the surface) • Utility lines (note that Ms. Utility might not be able to locate all of them, especially in older areas • Root of old legacy trees • When placing a new structure on an already developed area (i. e. , an existing parking lot)
Concluding: In most cases these are: • Lot of overlap • Small projects • Infill lots • Urban lots • Redevelopment projects It is often what is underneath that counts
Non-Standard Practices DEQ does not specifically endorse, approve or prefer any of these measures over any others. They should be used on a case-by-case basis DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Some adaptations of and to the current ESCH practices
3. 05 Silt fence
3. 05 Silt fence Legacy trees Mulch S i l t Land disturbance Straw bale
3. 14 Sediment basin
3. 14 Sediment basin
3. 13 Sediment trap (DE)
3. 13 Sediment trap (DE)
3. 14 Sediment basin Skimmer DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 14 Sediment basin Skimmer DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Ways to enhance sediment removal and settling from sediment basins Surface withdrawal of the water (skimmer) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 14 Sediment basin (PA specifications) In 6 days Clay particles can drop 31 ft. DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 14 Sediment basin (PA specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 18 Outlet Protection DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 18 Outlet Protection (PA specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Stilling Basin/Plunge Pool (CA DOT specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
3. 19 Riprap DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis! Flexamat
3. 36 Soil Stabilization Blankets and Matting Use as temporary stabilization? VIDEO
Innovative Measures Natural/Biological Practices
Compost What is compost? • Well decomposed organic materials • Provides organic matter (>35%) • Nutrients • Micro-organisms
Compost What is the function of compost? • In the soil – Provides organic matter (>35%) • • Opens up the soil Glues the soil particles together Prevents nutrients from leaching out (CEC) Feeds micro-organisms – Provides nutrients – May provide some micro-organisms • Compost logs • Compost berms DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Blankets • Seed infused directly into the compost and applied by blower truck • Compost blankets are typically applied at 1” to 2” depth up to 2: 1 slopes • Some companies sell compost blankets establish turf quicker reducing soil loss for better erosion control than traditional methods DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Blankets Compost blanket great results! Hydro seeding & straw limited germination DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis! Results after ½-inch of rain, six weeks later Source: Filtrexx International, LLC
Compost Blankets Type of Plot (Hwy Environment) Vegetation Cover Sediment Loss(kg/10 m 5) 1: 3 slope Compost on Sand 92% 3. 88 Compost on Clay 99% . 34 Wood Chips w/Terra Tack SC on Sand 48% 11. 27 Wood Chips w/Terra Tack SC on Clay 95% . 15 Wood Chips w/RMB Plus on Sand 50% 10. 97 Wood Chips w/RMB Plus on Clay 57% . 30 The compost plots produced 92% vegetation cover on sand 99% vegetation cover on clay! Source: Texas DOT
Compost Blankets “Even in Virginia research showed that a 2” compost blanket reduced erosion to an acceptable level. ” Source: Tyler, 2001
Compost logs DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Filter Logs (PA specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Filter Logs (Columbia Gas, VA specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Filter Logs (Columbia Gas, VA specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
xx DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
xx DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Filter Log DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost Log Sediment Trap (DE specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Compost berms DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Wood chips sock DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Wood chips sock DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Wood chips sock DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Wood Chip Filter Berms (PA Specifications) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Fiber logs DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Fiber logs DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Fiber logs DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Erosioneels DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Gutter buddy DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Gutter buddy DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Gutter buddy DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Innovative Measures Site adaptations
Pavement grinding/Lowering of the site
Pavement grinding/Lowering of the site
Lowering the site + Curb inlet protection
Modified diversion
Modified diversion
Innovative Measures Mechanical practices
Silt-Saver Inlet protection DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Drop inlet protection DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Drop inlet protection (DE Specification) DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Drop inlet protection DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Drop inlet protection DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Drop inlet protection? ? ?
Grate. Gator DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Grate. Gator DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Grate. Gator DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Dura. Wattle DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Dura. Wattle DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Smart Ditch DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Concrete washout DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Concrete washout DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Concrete washout DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
Innovative Measures Chemical Processes
What do polyacrylamides do? • Polyacrylamides causes the flocculation of microscopically small (insoluble) particles (clays). They come together to form flocs or flakes that get heavy enough to drop out of suspension. DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
What do polyacrylamides do? • Polyacrylamides causes the flocculation of microscopically small (insoluble) particles (clays). They come together to form flocs or flakes that get heavy enough to drop out of suspension. • Other agents do this coagulants – Alum DEQ does not specifically recommend, endorse, approve or prefer this any of these practices over any others. They should be used on a case-by-case basis!
In Summary • There are many alternatives out there. • Many claim to be better, than the practices in the ESCH (Green Book). • They may be worth a try/approving In the next module we will look at the process of allowing their use and inspection
Non-Standard Practices DEQ does not specifically endorse, approve or prefer any of these measures over any others. They should be used on a case-by-case basis