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Project Status: complete

Report Published June 1981:

Title: Inventory of emissions from marine operations within the California coastal waters.

Principal Investigator / Author(s): Kelly, W.C.

Contractor: Scott Environmental Technology, Inc.

Contract Number: A6-208-30

Research Program Area: Emissions Monitoring & Control

Topic Areas: Mobile Sources & Fuels, Transport


The goal of the marine emissions evaluation program was to determine the nature and extent of marine and marine activity related air pollution emissions in the coastal waters and ports of California during the calendar year 1976. Originally, the program was designed to determine these emissions in the waters bounded by the South Coast Air Basin, however, the study was subsequently expanded to cover the entire coast of California. Major sources of emissions were determined to result from the operation of marine engines and auxiliary power plants and from the transport, handling, storage and transfer of petroleum and petroleum products and ballasting and lightering associated with tanker vessel operation. In order to obtain precise data, Scott attempted to trace and record the activity of each and every commercial vessel in the waters of California and to calculate the emissions relating to each and every activity of these vessels. From marine related activities in 1976, Scott determined that within California Coastal Waters: 41.4 tons per day of NOx were emitted. 8.3 tons per day of CO were emitted. 79.2 tons per day of SO2 were emitted. 21.5 tons per day of hydrocarbons were emitted. 7.6 tons per day of particulates were emitted. It was further determined that of the total hydrocarbons emitted (21.5 tons per day), 14.8 tons per day resulted from vapor emitted from tanker vessels during loading of petroleum and petroleum products, and ballasting following tanker unloading and 3.6 tons per day result from vapors emitted due to in-transit (breathing) losses.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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