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3.3.2.1 POINT Source Inputs.

     The ISC POINT source algorithms are used to model releases from stacks and isolated vents, as well as other kinds of sources.  The syntax, type and order for the SRCPARAM card for POINT sources are summarized below:

Syntax:

SO SRCPARAM  Srcid Ptemis Stkhgt Stktmp Stkvel Stkdia

Type:

Mandatory, Repeatable

Order:

Must follow the LOCATION card for each source input

where the Srcid parameter is the same source ID that was entered on the LOCATION card for a particular source, and the other parameters are as follows:

Ptemis ‑ point emission rate in g/s,

Stkhgt ‑ release height above ground in meters,

Stktmp ‑ stack gas exit temperature in degrees K,

Stkvel ‑ stack gas exit velocity in m/s, and

Stkdia ‑ stack inside diameter in meters.

It should be noted that the same emission rate is used for both concentration and deposition calculations in the ISC models. An example of a valid SRCPARAM input card for a point source is given below:

SO SRCPARAM  STACK1  16.71  35.0  444.0  22.7  2.74

25

where the source ID is STACK1, the emission rate is 16.71 g/s, the release height is 35.0 m, the exit temperature is 444.0 K, the exit velocity is 22.7 m/s, and the inside stack diameter is 2.74 m.  All of the parameters must be present on the input card.

 

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