Proper contaminated soil mixing method

The keys to a successful contaminated soil mixing method is (1) using the right reagent, (2) using the right dosage and (3) achieving good mixing of the reagent and the waste. If there has been extensive testing of the remedial site that shows both the lateral limits and depth of the contamination, then it is recommended that a grid be established over the area before mixing begins. 

Typically, a grid of 25’ x 25’ or 50’ x 50’ is used when contamination is deeper than a foot.  Larger grids may be more efficient if contamination is shallow. The grid allows the application of the reagent at varies dosages, from grid to grid, and it is an effective way to help allocate premeasured amounts of the reagent. Blastox 215 is a versatile heavy metals stabilization reagent that is effective across a wide variety of waste types, metal concentrations and application methods.

As an example, using a 25’ x 25’ grid where the contaminated soil mixing method extends down 3’ and soil with a density with a ratio of 1.4, the calculation of the weight of the soil and the Blastox dosage at 3% by weight would be: 25’ x 25’ x 3’= 1875 cu.ft, or 69.45 cu yds x 1.4 = ~ 97 tons.  97 tons x 3% dose = 3 tons of reagent.  The dose is 3% after mixing.  So the formula to determine the tons of Blastox needed would be 97 tons / (1- 0.03) = 100 tons.  After mixing, there will be 100 tons.

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