EMISSION INVENTORY SOURCE CATEGORY

METHOD SUMMARY

This category includes total organic gas (TOG) emissions for 2001 from perchloroethylene dry cleaning establishments. The emissions for other synthetic solvents (EIC 210-200-8102-0000) and petroleum solvents (EIC 210-200-8150-0000) are not updated at this time. Statewide, the emissions from each of these categories are less than 1 ton per day TOG. ARB's Stationary Source Division is currently conducting a survey of the dry cleaning industry. When completed, the survey results will be reviewed for possible inclusion in the emissions inventory.

ACTIVITY DATA SOURCE: The process rate information is taken from national consumption rates for the year 2001 cited in the Solvents Update (July/August 2002) report compiled by the Halogenated Solvents Industry Alliance, Inc. National perc consumption was apportioned to California by the ratio of the state population to the national population. Statewide perc consumption was then apportioned to the counties on the basis of population.

EMISSION FACTOR SOURCE: Based on data in the Draft CAPCOA Air Toxic "Hot Spots" Program Perchloroethylene Dry Cleaners Industry-wide Risk Assessment Guidelines (June 20, 2000), a 25% recovery rate is assumed. The solvent recovery factor of 0.75 (for 25% recovery) is applied to perc's density of 13.5 pounds per gallon to obtain the emission factor of 10.125 pounds per gallon. From these data, the TOG emissions are calculated.

TEMPORAL DATA: The temporal activity is uniform year round, with deliveries assumed to be continuous 24 hours per day, seven days per week and 52 weeks per year.

CHANGES IN METHOD AND EMISSION ESTIMATES: This method uses updated process rates. The solvent recovery factor is the first attempt at capturing recovered solvents.

DATE OF THE LAST UPDATE: December 2002

GROWTH PARAMETER: The growth parameters are based on population data from the Department of Finance.


STATEWIDE EMISSIONS SUMMARY (2001 - ANNUAL AVERAGE TONS/DAY)

CES No.	TOG	CO	NOX	SOX	PM
46805	6.43	0.00	0.00	0.00	0.00