Service Offerings: Commercial Services: Due Diligence Delta understands the goal of sale or transfer of developed or vacant property is optimizing returns while minimizing environmental liabilities and risk. We offer the full range of due diligence services specifically designed to create value for all sellers, investors, developers and end users, including: Property portfolio assessment and environmental planning Phase I Environmental site assessments performed in accordance with ASTM standard Practice E 1527-00, or client specific requirements Asbestos assessments and management plans Phase II environmental site assessments including baseline site assessments Development of cost effective, practical strategies and approaches to meet needs and schedules of the development process