Brownfield sites have a variety of pollution that has accumulated over a long period of time or can be the result of a recent industrial accident. These sites are a receptacle for organic and inorganic pollutants. In particular, although Arsenic (As) is a naturally occurring element abundant in the earth's crust, contamination of soils has been aggravated by industrial activities. The bioaccumulation and non-degradability of As cause a variety of adverse health effects. Among treatment technologies, electrokinetic remediation (EKR) allows As extraction from soils. The technology of EKR is more effective than soil washing or flushing for fine-grained soils; it can be applied in-situ with low energy expenditure and is considerably more rapid than other techniques (phytoextraction, bioremediation). The purpose of this work is to apply EKR to evaluate its potentialities to remove more particularly As (but also Cd, Cu, Pb and Zn) from an accidentally contaminated industrial soil. Soil properties being very different as a function of depth (0–5 m), the main transport mechanisms of As with EKR were examined in each layer. The soil was collected from an industrial site (Le Havre, France) where an accidental spillage occurred in 2009. Liquid effluents containing potash arsenate infiltrated through surrounding soils. The results from laboratory investigation showed that the EKR technology provides variable efficiency from different soil layers owing to different gradation and fines content. This study addressed the necessary combination of different remediation technologies when the treated soil involve completely different horizons.