This collection contains facsimiles of field books, records, reports and other materials related to pesticide waste pits operated at the University of California, Riverside. The pits served as disposal sites for experimental herbicides, pesticides, and other hazardous chemicals tested and utilized at UC Riverside during the twentieth century. Series I contains information on the pesticide waste pits operations. Series II has materials related to the remediation project. Series III is a collection of analyses and reports on the Pesticide Waste Pits site.