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TABLE L-1 Potential Data Needs for Calculation of Emissions

Process Vents

1.

Volumetric flow rate of vent gas

2.

Vent-gas discharge temperature

3.

Concentration of individual or aggregate HAP

4.

Operating hours per year of unit operation

5.

Molecular weight of gas

6.

Efficiency of control device

7.

Production rate during measurement

Fugitive Emission

1.

Numbers of pumps, valves, flanges, pressure-relief valves, open-ended lines, and compressors

2.

Screening level

3.

Weight % of HAPS in stream

4.

Percent leaking equipment

5.

Other HAPS characterization

6.

Frequency of leak checking

Loading Emission

1.

Type of cargo carrier

2.

Mode of operation

3.

Annual volume of liquid loaded

4.

Temperature of liquid loaded

5.

Weight in percent of HAP in loaded material

6.

True vapor pressure of HAP loaded

7.

Molecular weight of HAP

8.

Efficiency of control device

Storage-Tank Emissions

1.

Material stored

2.

Diameter of tank

3.

Rim seal type

4.

Tank, roof, and shell color

5.

Ambient temperature

6.

Wind speed

7.

Density and partial pressure of chemical

8.

Molecular weight

9.

Vapor pressure

10.

Efficiency of control device

11.

Type of storage tank

12.

Annual throughput

13.

Number and diameter of columns

Emission Factors

1.

Magnitude of input into the process

2.

Production level

Wastewater Sources

1.

Volumetric flow rate of wastewater

2.

Concentration

3.

Production rate during flow determination

4.

Production rate during concentration determination

Source: EPA, 1991c.



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