Fig. 1. Location of the sampling points G4, G17, and G18, and the ground water monitoring wells MW2, MW3, MW8, MW9, MW11, DEMOGW4, DEMOGW6, and the piezometer DEMOGM20 at the Trollberget site. The core of the plume is indicated with dark gray color and the fringes of the plume with a light gray color. The arrows indicate the distances and directions to points G4, DEMOGW4, and DEMOGW6. Direction to the north (N) is indicated with a thick arrow.