Provided below are some useful environmental documents and diagrams that are provided free for others to use at their own risk.
Useful chlorination and pipe volume calculator This allows simple and quick calculation for chlorination of water infrastructure Useful chlorination calculations.xlsx Microsoft Excel sheet [13.0 KB]
Calculator for determing falls for foul drainage pipe lines Foul drains have to be laid with a specific fall dependant on pipe size to ensure correct function - too steep and the liquid will leave the solids behind, too shallow and it won't drain freely. This calculator accurately calculates the fall needed over any given distance. Fall calculator.xlsx Microsoft Excel sheet [10.6 KB]
Calculator for determing surface area for soak-away/drainage field area for septic tanks and sewage treatment plants The surface area of a soak-away/drainage field must be correctly calculated to ensure that it works correctly. As a minimum the percolation test should be completed at least three times from several trial pits representative of the area of the proposed soak-away. Percolation test calcs.xlsx Microsoft Excel sheet [11.4 KB]