This series is comprised of technical reports published from 1991 to about 2000 by Pyrite Canyon Group, a private corporation located in the city of Riverside. Reports document the results of various field studies conducted at the Stringfellow Hazardous Waste Site. Projects were often contracted by Pyrite Canyon Group and undertaken by outside consulting firms, including Bechtel Environmental, Inc. and S.S. Papadopulos and Associates, Inc. Reports pertain to multiple topics and projects, including the community well test program, community extraction system, routine groundwater monitoring and site maintenance operations, and soil vapor extraction field tests.