scope:

INTRODUCTION

The use of a leaching test which could be utilized by industries and regulatory agencies as a means of predicting degree of contamination from a waste material would greatly enhance the ability to soundly choose safe disposal sites for industrial wastes. Currently various parties are using soil column tests or shake tests to evaluate leachability, however, these procedures are not standardized, thus results are not comparable from one method to another.

The objective of this study was to evaluate leaching test procedures in order to recommend a leaching test that could be applicable to petroleum waste landfarming. Shake' tests and column tests were performed and the following variables were evaluated:

- amount of soil in soil columns

- retention time in soil columns

- order of addition of waste and leaching material

- prefiltering methods prior to soil passage