Reference Library

Soilworks products are the industry’s top standard due to our insistence on creating high performance soil stabilization and dust control products that stand up to rigorous testing – both in the lab and in the field. Our commitment to quality and performance has led to our involvement and testing in hundreds of real-world situations. The following library of reports, presentations, specifications, approvals and other similar documents provide you, our customer, the transparency and dependable assurance that is expected from Soilworks.

Phoenix Sky Harbor International Airport – Aviation Environmental (TPD0804025)

PowerPoint Presentation

Slide 1

ADEQ Arizona Pollutant Discharge Elimination System (AZPDES) General Permit for Discharge from Construction Activities to Waters of the United States 2008

Impacts to the CNRP Final

Treatment/Stabilization Process

Slide 2

Today’s Presentation

  • Review of AZPDES Permit Changes
  • ADEQ’s approved forms of soil stabilization
  • Current VARS Soil Stabilization/Dust mitigation plan
  • Current soil stabilization product used by VARS, how it works, who has been using, it and finally for what applications
  • How Soiltac® stacks up to the current ADEQ allowed forms of permanent stabilization
  • Cost Benefit Analysis

Slide 3

Review of the AZPDES permit Changes

How has it changed?

  • City must submit a general NOI to ADEQ
  • Contractors must submit neighborhood or individual NOIs to ADEQ
  • Contractors must provide temporary stabilization or initiate final stabilization within 14 days of the most recent land disturbance
  • Contractors must submit NOTs within 30 days of
    • Final stabilization has been achievement
    • Another operator assumes control over the site


Slide 4

ADEQ’s approved forms of soil stabilization

How does the new permit define stabilization?

  • A uniform perennial vegetative cover with a density of 70% of the native background (Virgin Desert) vegetative cover for the area is in place.  If 50% vegetative cover exists prior to construction activities then 70% of the 50% would be accepted.
  • Equivalent permanent stabilization measures (such as the use of riprap, decomposed granite, gabions, or geotextiles) have been employed


Slide 5

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Slide 6

Current VARS Soil Stabilization/Dust Mitigation Plan

  • In order to meet county dust control requirements, VARS is applying a polymer based soil stabilizer to the ground surface.  This stabilizer is under warranty for one year and a maintenance plan is in place to resolve issues after that year as needed.
  • The product we have been using is SOILTAC by Soilworks®.  Soil stabilizers of these type are not currently approved as a form of final stabilization by the AZPDES permit.
  • As a result we would like to present the following information about the polymer based soil stabilizer currently used by the VARS program to ADEQ for their consideration as a final stabilization measure


Slide 7


  • Synthetically Manufactured Vinyl Copolymer
    • Similar properties to liquid plastic adhesives
    • Prime material manufactured molecule by molecule, not a by-product
    • Ecologically and environmentally safe
    • Soil stabilizer engineered to solidify any soil or aggregate

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Slide 8

How Soiltac Works

  • Utilizes water as a carrying and compaction agent
  • As water evaporates, Soiltac molecules coalesce, link and cross-link together
  • Adhere & Bind Dust & Soil Particles
  • Form a strong & tightly bound matrix
    • Topical Surface Stabilization
    • Mix-in/Processed Stabilization

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Slide 9

Soiltac Uses and Rates

  • Soil Stabilization
    • Heavy  Application Rates
    • Road Construction, Runways, Helipads, Sub-Bases, etc.
  • Water Erosion Control
    • Medium Application Rates
    • Slopes, Berms, Golf Bunker Stabilization, Dikes, etc.
  • Wind Erosion Control
    • Light Application Rates
    • PM10 Dust Stabilization/Air Quality, FOD Control, etc.


Slide 10

How does Soiltac stack up when compared to ADEQ approved forms of permanent soil stabilization?


Slide 11

Soiltac vs. Vegetative Cover

  • Ease of application
  • Conserves water resources
  • Minimal maintenance
  • Requires seeding
  • Daily irrigation
  • Continual maintenance
  • Potential fire hazard

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Slide 12

Soiltac vs Riprap

  • Proven effectiveness with soils <0.075 mm
  • Stabilization inhibits vegetative growth
  • Preserves native background
  • Typically used on shorelines
  • Requires vegetative maintenance and Geotextile
  • Extensive installation transportation and removal

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Slide 13

Soiltac vs. Decomposed Granite

  • Long term PM10 control
  • Prevents storm water silt loading
  • Water Resistant; will not wash away
  • Eliminates Import/Export
  • Possibility for Opacity still eminent without stabilization
  • Storm water silt hazard
  • Requires depth >2”
  • Requires periodic maintenance or underlay

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Slide 14

Soiltac vs. Gabions

  • Engineered for use on level or sloped surfaces
  • Increases wet and dry strength of any soil
  • Used for retaining walls
  • Designed for vertical applications
  • Not reasonable for flat stabilization

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Slide 15

Soiltac vs. Geotextiles

  • Designed for surface and/or subterranean application
  • Ultraviolet ray resistant
  • Not designed for surface application
  • Rapid deterioration with exposure to sunlight
  • Continued vegetation management evident

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Slide 16

Known Geotextiles Considerations

  • Products deteriorate significantly with age
  • Adverse weathering reaction in desert environment (Decomposition)
  • Up to 70% reduction in strength at 500 of direct sunlight hrs per ASTM D-4355
  • Most geotextile fabrics are ineffective after 60 days of sun exposure


Slide 17

Recent Final Stabilization Projects Utilizing Soiltac Soil Stabilizer

  • ADOT Unpaved Road Stabilizer 11/05
  • US Army Corp of Engineers – Helipad Stabilization 4/04 & 2/06
  • Marine Corp Air Grounds Combat Center 7/07
  • Khumani Mine 300 Ton Heavy Haul Roads – South Africa 3/07
  • California Dept of Transportation 10/06
  • New Mexico Dept of Transportation 6/07
  • Nevada Dept of Transportation 11/04
  • US Army Corps of Engineers – Rapid Airfield Construction 8/07
  • U.A.E. Army – 600 km Saudi Arabian Border Patrol Roads 8/05
  • US Army Corps of Engineers – Base Camp Operations 3/05 & 10/05


Slide 18

ADEQ Considerations for Final Stabilization with Soiltac

•           Engineered to solidify any soil or aggregate

•           Permanent with minimal maintenance

•           Ecologically and environmentally safe

•           Easy to apply

•           Conserves resources

•           Preserves native background

•           Long term PM10 control

•           Water and UV resistant

•           Prevents storm water silt loading

•           Designed for surface and subterranean use

•           Eliminates Import/Export

•           Increase wet and dry strength of any soil

  • Already approved through Maricopa County as a Dust Suppressant


Slide 19

Assumed Cost Summary*

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