What this tool does
Produces an auditable parameter-by-parameter comparison without uploading the log or converting example values into universal requirements.
When to use it
Use after the approved setup is operating and calibrated instruments have produced time-ordered readings in the displayed schema.
Inputs and supported units
Each labelled field explains the quantity it expects. Unit-system changes convert existing numeric entries once and keep calculations on a single SI internal basis. Supported shared units include L/min and GPM, metres and feet, kPa and psi, millimetres and inches, kW and hp, and °C and °F as relevant.
Calculation or decision method
Relative range (%) = range ÷ |mean| × 100
Integrated purge volume = Σ(time interval × preceding flow)
pH, ORP, depth-to-water and flow use absolute ranges; temperature, conductivity, dissolved oxygen and turbidity use relative ranges.
How to interpret the result
Read the primary result with the supporting breakdown and warning. A plausible number is not evidence that every input, operating case or design constraint has been included.
Worked example
Three readings at minutes 0, 5 and 10 are compared as one window. The report says only MET when every entered criterion passes; any one failed parameter produces NOT YET MET.
Assumptions
Well construction, water levels, equipment dimensions, flow and field readings are site-specific measurements entered in consistent units. All comparison criteria are supplied by the user from the governing plan or authority.
Limitations
These tools calculate geometry, displacement and numeric variation only. They do not select a sampling method, prove sample representativeness, establish laboratory requirements or authorize collection or disposal.
Sources
- U.S. EPA — Groundwater Sampling Operating Procedure (EQASOP-GW4)
- U.S. EPA — Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures
- U.S. Geological Survey — Purge Analyzer Tool (PAT)