FIG. 6. The ratio of the maximum annual leaching concentration for the lysimeter divided by the 80th percentile leaching concentration for the field as a function of the organic-matter/water distribution coefficient, K_OM. The maximum is the maximum of two annual average leaching concentrations following a single application. The 80th percentile was derived from a series of 20 2- or 3-yr average flux concentrations for application every 2 or 3 yr, respectively. The points are simulations for 200 hypothetical pesticides with DegT50 values ranging from 1 to 100 d, but results were included only if the 80th percentile concentration of the pesticide was above 0.1 µg L^–1.