TABLE OF CONTENTS

Director's Perspective

Executive Summary

SOURCES
Characteristics of Effluents from Large Municipal Wastewater Treatment Plants in 1989

Characteristics of Effluents from Small Municipal Wastewater Treatntent Plants, Electrical Generating Stations, and Industrial Facilines in 1989

Mass Emissions Estimates for Selected Constituents from the Los Angeles River

FATES
Potential Applications of Waste Specific Molecular Markers .

PCBs in Los Angeles Harbor.

Sources and Magnitude of Error Associated with PCB Measurements

EFFECTS
Sublethal Effects of Hydrogen Sulfide in Marine Sediments

Wastewater Toxicity Studies

Toxicity of Surface Runoff in Southern California

Changes in Macrobenthic Assemblages After Termination of Sludge Discharge into Santa Monica Bay

An Assessment of Monitoring in Santa Monica Bay

ADDITIONAL ACTIVITIES
Sampling at Sea in 1989-90

SCCWRP Presentations in 1989-90

SCCWRP Contributions in 1989-90