EESI Contracting owns and uses specialist plant for the remediation of contaminated sites. Of particular note is the Mobile Unit for Soil Treatment (MUST). Originally developed for the Japanese market, the MUST was principally designed to stabilise low strength soils such as marine sediments. EESI Contracting utilise the MUST on a range of projects, including bioremediation of PAHs, metal stabilisation and liming of acid sulfate soils.

EESI Contracting is one of a very few number of companies in Australia to utilise a MUST. This equipment gives us a technical edge that allows us to offer clients robust remediation options and outcomes. Material for treatment is loaded into the raw material hopper and is fed by conveyor into the primary mixing chamber. Measuring sensors monitor the feed of raw materials and additives such as soil ameliorants, fertilizers, bond breakers and stabilising agents as they are added to the feed either from an overhead silo for solid additives, or by sprays for liquid additives.

Computerised controls ensure additives are combined at the predetermined required rate. The primary mixing is via a soil cutter, pointed blades that break up any clods of soil. The material then undergoes secondary mixing via rotary hammers arranged on a three axle system. The material drops onto the discharge conveyor where it undergoes tertiary mixing via an after cutter located at the top of the discharge conveyor. The discharge conveyor is fully enclosed for both safety and dust control purposes. The rate of material processing can be up to 250 tonnes per hour (depending on the nature of the material).