initialize organics and constituents for each aquifer object initial pesticides initialize pesticides in aquifer water and benthic from input data kg/ha = mg/kg (ppm) * t/m3 * m * 10000.m2/ha * 1000kg/t * kg/1000000 mg assume bulk density of 2.0 t/m3 initial pathogens initialize pathogens in aquifer water and benthic from input data initial salts !rtb salt initial constituents !rtb cs