The report presents general guidelines for sampling and statistical methods for ambient pesticide monitoring. The following major chapter headings are included: Statistical and Study Design; Air; Soil; The Hydrologic Environment; Estuaries; Fresh Water Fish; Wildlife; Food and Feeds; Human Tissues. Discussions presented in each chapter include: selection of species or substrate to be sampled, criteria for sampling site selection, sampling equipment selection and care; criteria for selection of pesticides to be monitored; specific techniques; sample handling and storage. Several chapters contain literature references.