ABSTRACT
O b se rv a tio n s o f co n tam in an t co n cen tra tio n s in su b su rface en v iro n m en ts are m o s t co m m o n ly u sed to ch a rac te rize th e ex ten t o f co n tam in a tio n or, in cases o f k n o w n co n ta m in a n t re lease h is to ries , to e stim a te th e tran sp o rt p ro p e rtie s o f the p o ro u s m ed ia . In th is p ap er, w e ex p lo re a re la ted s itu a tio n , in w h ich the tra n sp o rt p ro p e rtie s o f th e m e d ia a re reaso n ab ly w ell k n o w n , b u t the co n ta m in a tio n h is to ry is no t. In th is case , m easu rem en ts o f c u rre n t c o n tam in an t p ro f ile s can b e u se d to m ak e in fe ren ces ab o u t th e co n tam in a tio n source .
