This publication provides introductory technical guidance for civil engineers, environmental engineers and other professional engineers, environmental managers and construction managers interested in site screening to evaluate in situ thermal remediation of contaminated soil. Here is what is discussed: 1. INTRODUCTION, 2. DATA COLLECTION REQUIREMENTS TO SUPPORT REMEDY SELECTION AND DESIGN, 3. SITE PHYSICAL PROPERTIES AND SITE CONDITIONS, 4. CHEMICAL ANALYSES AND CONTAMINANT PROPERTIES, 5. DATA NEEDS SPECIFIC TO EACH TECHNOLOGY, 6. EVALUATION OF BIOLOGICAL DEGRADATION POTENTIAL.