The Stringfellow Hazardous Waste Site collection contains technical reports, media clippings, correspondence, public records, ephemera, notes, government publications, photographs, and other material regarding the Stringfellow Hazardous Waste Site, a Class I industrial waste disposal facility in Glen Avon, California, that operated from August 1956 to November 1972. Materials also document the community activism of Glen Avon resident Ruth Kirkby. Media clippings document local news coverage of the site and are primarily from Riverside County and Los Angeles County newspapers. The Ruth Kirkby papers capture the political agency exercised by Kirkby on behalf of the Glen Avon community. Papers pertain to Kirkby's involvement with entities aimed at eradicating the Stringfellow Hazardous Waste Site, and her active pursuit of records documenting the Stringfellow Quarry Company's activities in Riverside County. Field studies, treatments, and other projects undertaken by local, state, federal, and private agencies at the site are recorded in technical reports.