Elliott Bay Action Program: Guidance for Development of Monitoring Programs to Evaluate the Success of Source Control within Drainage Basins. Puget Sound Estuary Program

摘要

The report describes development of a monitoring program in Seattle to evaluate the effectiveness of source controls in reducing toxic contamination in drains and in the receiving environment. The maximum annual budget for the program is approximately $50,000. Different approaches are proposed to provide agencies the flexibility to accommodate different goals and resources. Assumptions include: type and degree of source control is known; sediment is the optimum sampling medium; analysis of drain sediment samples have higher priority than receiving environment samples; chemical analysis has higher priority than biological analysis; sediment toxicity is a more useful indicator of contamination than is altered benthic community structure. An important step in the program design is to review the historical data to determine whether other sources or other chemicals within the monitored drain system could confound interpretation of the monitoring data. The major considerations in design are generation of baseline data, sampling season, sampling station locations and sampling frequency. After baseline data collection recommended sampling frequency is every 2-3 years.