STA Certified Compost For Professionals2020-07-22T08:55:28-05:00

IDOT (Illinois Department of Transportation) – Certified Producer

Approved supplier for Illinois Department of Transportation (IDOT) for road and bridge construction use (IDOT Producer / Supplier Number is 7122-01)

What is the Seal of Testing Assurance Program (STA)?

Sta Certified Compost For ProfessionalsCreated in 2000, the US Composting Council’s Seal of Testing Assurance Program (STA) was designed to give construction contractors, landscape architects, engineers, and professionals accurate and informed details about compost products. The STA Program is currently considered the gold standard of compost testing, labeling, and information disclosure.

Why Do Professionals Need STA Certified Compost?

Many Departments of Transportation (DOTs) across the country require STA certified compost to be used on projects under their jurisdiction. Call Midwest Companies at 847-426-6354 and tell us about the specifications of your next road or bridge construction project. We can help you get started and provide the STA Certified Compost for your project.

Contact Midwest Companies

  • For an accurate quote please provide City, State & Zipcode.
Compost filter berms and blankets (layers of compost covering the soil) for sediment and erosion control on steep slopes.


The IDOT Standard Specifications for Road and Bridge Construction

1081.05 Topsoil and Compost. Topsoil and compost shall be according to the following.

(a) Topsoil. Topsoil shall be loamy soil from the A horizon of soil profiles of local soils. Loamy soil and the A horizon soil profile are defined in the Geotechnical Manual. The loamy soil shall have an organic content between one and ten percent according to AASHTO T 194. It shall be relatively free from large roots, sticks, weeds, brush, or stones larger than 1 in. (25 mm) in diameter, or other litter and waste products. At least 90 percent shall pass the No. 10 (2.00 mm) sieve according to ITP 27, and the pH shall be between 5.0 and 8.0 according to ASTM D 4972.

Topsoil shall be capable of supporting and germinating vegetation.

(b) Compost. Compost shall be thoroughly decomposed organic waste produced at an IEPA registered composting facility. The compost shall have no glass or metal shards present. Any plastic or other man made material shall be no larger than 1/4 in. (6 mm) and sieved out to be less than one percent of the total dry weight. A copy of the compost test results complying with IEPA standards for General Use Compost and certification of IEPA registration shall be provided to the Engineer with each shipment of compost.

Compost shall be capable of supporting and germinating vegetation.