The parameters include the hydraulic head of the leachate collection system [h.sub.w], the thickness of GM [h.sub.G], the defects of GM, the thickness of CCL [h.sub.c], and the coefficient of conductivity. Because of time and space limitations, attention is paid to the migration behavior of [Cd.sup.2+].

Property Coefficient of conductivity [k.sub.c] ([m.sup.2]/s) 1 x [10.sup.-8] 1 x [10.sup.-9] Porosity n 0.42 0.35 Dry density (g/[cm.sup.3]) 1.69 1.79 Coefficient of conductivity [k.sub.c] ([m.sup.2]/s) Property 1 x [10.sup.-10] Porosity n 0.28 Dry density (g/[cm.sup.3]) 1.90 TABLE 3: Characteristics of the contaminant transportation.

To minimize the losses of heat by the side edges and lower plane, the samples were insulated by a layer of hard mineral wool (5 cm thick - side edges 10 cm thick - bottom plane) with the [lambda] = 0.037 W/(mxK)

coefficient of conductivity and a heat-proof film which fulfils the function of protection against possible humidity penetration.

In the case when the fluid that passes through the porous material is water, permeability can be expressed by the

coefficient of conductivity k [m.[s.sup.-1]], which means a discharge velocity of water flow in a rock under the action of a unit hydraulic gradient, usually expressed in meters per second

The possible effect of low conductivity (low osmolality) on the lysis of RBCs was assessed in these urines (our correlation

coefficient of conductivity to osmolality was r = 0.87 in another sample of 100 patient urines; unpublished data).