How do you blend Engineered Soils?

Engineered soils are blended, manufactured soils with specific ratios of components.  The sand component can is often specified by gradation, for example ASTM c33.  The topsoil component may include a certain percentage of organic matter, pH, or texture.  The compost component may have to include a certain percentage of organic matter or meet the USCC STA requirements.  Once the key components are acquired the best way to blend the components is with a precision blending system.  Each component must be measured by volume or weight (scaled) prior to loading into the mixing system.  It is best to do a large quantity or the whole project’s quantity at a single run so that the entire mix is homogenous with no variability.  Sampling the components and final stockpile of engineered soil will ensure that the soil is compatible with the project prior to installation.