What needs to be clarified
Check the survey and calculation basis of soil volume, comparing height systems, calculation boundaries and before-and-after surface construction without equating geometric volume with the quantity transported to the site.
Materials to prepare
- Original points from both surveys with height systems and dates
- Surface files with breaklines, boundaries and construction settings
- Calculation schedule and grading plan identifying temporary stockpiles
What to compare
Verify common coordinate and height references, survey coverage and accuracy, then select a comparable area. Examine triangulation, breaklines, gaps and edge interpolation. Calculate cut and fill separately from surface differences and test boundary sensitivity; separate temporary stockpiles and do not introduce compaction or bulking without supported inputs.
Possible outcome of the analysis
Possible results include a check calculation and cut-and-fill map with an uncertainty range, showing supported geometric volume and areas where additional survey data are required for a reliable assessment.
Limits of the conclusions
Surface differences do not establish soil origin or truck counts. Total volume may remain indeterminate without original terrain; calculation does not establish whether the site alterations were legally authorised.