Coastal WEATHERPAK MTR Manuale d'uso - Pagina 16

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CHAPTER 4 WEATHERPAK

When the WEATHERPAK

real-time data is available to run air dispersion plume modeling software.

The following is a brief outline of the steps taken to produce an ALOHA

upon the assumption that the user is familiar with ALOHA

computer. Coastal Environmental Systems recommends consulting the ALOHA

CAMEO

/ALOHA

instructor for training, program details and limitations.

Begin by clicking on the ALOHA

Model Limitations" dialogue box will appear with important notes on program limitations. Read and select "OK".

A "Text Summary" window will appear with information summarizing the event.

Confirm that your "Site Data" information is correct. If required, use the [SiteData] drop-down menu to change

data.

Select the drop-down menu [SetUp] – [Chemical]. Choose the appropriate chemical.

Select the drop-down menu [SetUp] – [Atmospheric] – [SAM Station]. A series of dialogue boxes will appear

requiring user observations or assumptions. Please note: relative humidity is not captured automatically by the

ALOHA

model and may be entered manually using data from the WEATHERPAK

(Optional) Use the drop-down menu [SAM Options] – [Processed Data] to confirm that WEATHERPAK

being delivered to ALOHA

appears in both the "Text Summary" and "Processed SAM Data" windows if the WEATHERPAK

collecting data for less than five minutes.

ALOHA

requires the SAM station to be operating for five minutes before allowing the selection of the source of

the release (tank, pipe, direct, etc.). Select the drop-down menu [SetUp] – [Source], then select the source of

the leak (tank, for example). A series of dialogue boxes will appear requiring user observations or assumptions.

Select the [Display] – [Threat Zone] drop-down menu. A "Level of Concern" dialog box will appear with default

ERPG ranges displayed. Select "OK" to show the plume footprint. Displaying the footprint in ALOHA

essential before the plume can be overlaid on a MARPLOT

(Optional) Select the [Display] drop-down menu to produce graphs for source strength and concentration.

P/N: 0302-140-001 Rev. D

AND PLUME MODELING SOFTWARE

is assembled and operational, and a computer is connected to the Receiver/Display box,

desktop icon, or selecting ALOHA

. The "Processed SAM Data" window will appear. Please Note: A warning message

Figure 11 - ALOHA

plume model on a PC. The following is based

and that the program is properly loaded onto the user's

web site and/or a certified

from the Windows

or other street map.

Screen Capture

WEATHERPAK

User's Manual

Programs menu. An "Air

display.

data is

has been

MTR