EMISSION INVENTORY SOURCE CATEGORY

METHOD SUMMARY

These categories include the TOG and ROG emissions for 1991 associated with the operation of sumps and pits used in oil production processes. A sump is defined as an excavated lined or unlined pit in the ground that is used to separate oil, water, and sand for oil and gas production operations. The three types of sumps include: primary production sumps which receive a stream of oil and water directly from oil production, secondary production sumps that receive waste water streams from first stage separators, and tertiary production sumps which receive waste water streams from secondary separation processes (sumps or tanks) upstream of the sump. There are no primary sumps operating in California. The emissions from sumps and pits are the result of evaporation to the atmosphere. These sumps and pits are not covered.

ACTIVITY DATA SOURCE: The amount of sump emissions were gathered by ARB staff from the districts that reported sump usage in their jurisdiction in 1991. The data gathered were the sump area in square feet, the type of sumps, and the API gravity of the sump liquid.

EMISSION FACTOR SOURCE: The TOG emission factors for light crude sumps were based on test data collected by Rockwell in a report prepared for the American Petroleum Institute entitled "Fugitive Hydrocarbon Emissions from Petroleum Production Operations," 1980. The ROG emission factors for heavy crude were obtained from ARB tests conducted between 1983 and 1986. From the Rockwell TOG emission factors, ARB derived corresponding emission factors for ROG by using speciation profiles provided by Rockwell.

TEMPORAL DATA:

The annual, weekly, and daily activities are uniform throughout the year, seven days a week, and twenty-four hours a day.

DATE OF THE LAST UPDATE: December 1993

GROWTH PARAMETER:

Dollar output for oil and gas extraction (SIC 13). (SJVUAPCD parameter is based on barrels of oil.)

STATEWIDE EMISSIONS SUMMARY (1991 - ANNUAL AVERAGE TONS/DAY)

CES No.	TOG	CO	NOX	SOX	PM
81950	56.72	0.00	0.00	0.00	0.00

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This page last revised on November 12, 1997

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