And I’m sure your company wanted to verify the calculations were right. Not just some random internet site.
Water treatment or power plant?
I used the Formulas that were displayed on the pages they made in ExCell and just printed out. Then all day/night long they would sit with a handheld calculator and run the numbers. Then enter by hand on the printed pages. I checked all that Myself, I’m sure they checked also but not till I had. When I was finished they were amazed at how much time was available to do “other” things around the place. With fully functional Spreadsheets all that had to happen was run the Tests to get the results and the Meter Readings then plug them into the Sheets and POOF!!! Life simplified. The toughest Test Sheet to make work was the Langiler Hardness Test because the End Data was not on a Sliding Scale but I got it figured out.
Surface Water Plant- 30 MGD Treated Production.