The zip archive file “NAPetro10.exe” consists of four files, which include:

•NA_petro_Guidance10.pdf; Guidance on Remediation of Petroleum-Contaminated 
	Ground Water by Natural Attenuation: Ecology Pub. No. 05-09-091
•NA_petro_User'sManual10.pdf; User’s Manual: Natural Attenuation Analysis 
	Tool Package for Petroleum-Contaminated Ground Water: Ecology Pub. No. 05-09-091A
•Two Workbooks: Data Analysis Tool Package: (Spreadsheets: MS Excel 2002 version)
	•Package A_NAToolPetro10.xls:  Workbook for Natural Attenuation Analysis 
		tools without ground water flow model
	•Package B_NAToolPetro10.xls: Workbook for Natural Attenuation Analysis 
		tools with ground water flow model


For use with MS Excel XP (2002 version):
These MS Excel files may not be fully compatible with earlier versions of MS Excel. 
Double click on “Package A_NAToolPetro10.xls” or “Package B_NAToolPetro10.xls” files to begin.

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Warning:   When you open the MS Excel file, you may get an "Enable Macros?" query. 
You will then need to click on the Enable Macros button to run these MACROS.  
(You can disable this query by clearing the box marked "Always ask before opening 
workbooks with macros")
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POTENTIAL ERROR MESSAGE:
It is possible that Microsoft Visual Basic may open with an error window that 
states “Compile error: Can’t find project or library.”  If this is the case, it 
is likely that the Visual Basic routines included in the workbook cannot 
locate one or both of the following function files that need to be present on your 
computer’s hard drive to allow the workbook to perform correctly:

		LOOKUP.XLA
		SOLVER.XLA

To see if you have these files, use your file browser to search for them.  
Usually, these files are located in the Library folder contained in the MS Office 
folder.  The file "Solver.xla" is probably contained in a folder called “SOLVER” 
within the library folder.  IF you don’t have these files, THEN you may need to 
install one or both of them from your original Microsoft Office source disk.  
For more details, refer to the Section of "Common Error Messages and Trouble-
shooting Tips" of Chapter 2: General Instruction contained in "User's Manual".


ADJUSTMENT OF VIEWING AREA:
Check to see if the work area fits your screen. If you can't see the entire work 
area, you may want to shrink it to fit your screen:  select Zoom from the View 
menu.  Click on Custom and try a slight reduction (e.g., 85%), then click on the 
OK button.  If the work area is still not completely visible, try again with 
another reduction.  You can customize the Worksheets to fit your screen.

Comments or suggestions on the proposed guidance can be submitted to Hun Seak Park 
at: hpar461@ecy.wa.gov, (360) 407-7189; or, mailed to him at Department of Ecology, 
Toxics Cleanup Program, P.O. BOX 47600, Olympia, Washington 98504-7600.