The handbook is intended to assemble state-of-the-art information on in situ treatment technologies for hazardous waste - contaminated soils. Extensive references are provided for those who wish to seek more detail on a given topic. The Risk Reduction Engineering Laboratory is continuing with its research on in situ treatment to improve on technologies discussed in the handbook and to explore new technologies.

"An update of volume 1 of ... Review of in-place treatment techniques for contaminated surface soils (Sims and Bass 1984)"--Page 1 Shipping list no.: 90-147-P. "Jan. 1990." "This material has been funded ... by the United States Environmental Protection Agency under contract 68-03-3413 to PEI Associates, Inc."--Page ii Includes bibliographical references (pages 125-142) and index. "EPA/540/2-90/002."

This handbook comprises an update of volume 1 of the 1984 USEPA document entitled "Review of in-place treatment techniques for contaminated surface soils." The purpose of this handbook is the same as that of the original document - to provide state-of-the-art information on in situ treatment technologies for contaminated soils. Like the previous document, this handbook is written for the use of a varied audience with divers technical backgrounds ... An in situ treatment technology is defined as one that can be applied to treat the hazardous constituents of a waste or contaminated environmental medium where they are located and is capable of reducing the risk posed by these contaminants to an acceptable level or completely eliminating that risk. In situ treatment implies that the waste materials are treated without being physically removed from the ground ... The 1984 document consisted of two volumes. Only volume 1 is being updated by this handbook. The reader can refer to volume 2, however, for a still current and comprehensive discussion of the fundamental properties of soil/waste systems