v.0.1  ·  2026
Tool for estimating LNAPL saturation
using the Radon Deficit technique

Rn2NAPL logo Rn Deficit Calculator

Credits & Terms of Use

Rn2NAPL – tool for estimating LNAPL saturation and hydrocarbon concentration using the Radon Deficit technique.

Developed by the Laboratory of Environmental Engineering of the University of Rome Tor Vergata.

Developers: Nicolò Tonolo, Iason Verginelli



Terms of Use

- Free to use for technical, scientific, and study purposes only. Commercial use, modification, reverse engineering, and redistribution are prohibited.
- Results depend entirely on user-supplied data and modeling assumptions — no accuracy is guaranteed.
- This is not a certification tool; results carry no administrative or regulatory effect.
- The University of Rome Tor Vergata, the developers, accept no liability for decisions based on outputs.
- Use of this tool implies acceptance of these terms.

1

Database

⚠ {{alertDb}}
✓ {{dbSoilRows}} soils · {{dbCompoundRows}} compounds
🗄️
Database (.xlsx)Sheets: Soil, Compound — drag or click
{{dbFileName}}
2

Radon Data

⚠ {{alertData}}
✓ {{wellData.length}} points · col: {{customColName}}
📊
Data file (.xlsx)Name · Lat · Lon · R (Bq/mc) · [custom] — drag or click
{{dataFileName}}
3

Parameters

Select background point(s) (BG)
BG Point Rn (Bq/m³)
{{w.Name}} {{fmtRn(w.R)}}
⚠ No background point selected — the average of all points will be used as reference. For a more accurate calculation, select at least one background point (higher Rn values)
★ Background: {{backgroundWells.join(', ')}}
Soil Type and Product
{{currentSoil.th_e}}
{{currentSoil.th_w}}
{{currentSoil['rho_s (kg/L)']}}
{{currentCompound.Knw}}
{{currentCompound['Density (kg/l)']}}
Radon Henry Constant
Dimensionless H (default 4.4)
Rn2NAPL
No calculation performed
Upload the database and Radon data, configure the parameters, and press Calculate.
Data ready — press Calculate to start processing.
Export
✓

Calculation Results

PointLatLonRn (Bq/m³) {{customColName}}D (−)SN (%)C (mg/kg)
{{row.name}} ★ {{row.lat.toFixed(6)}} {{row.lon.toFixed(6)}} {{row.R.toFixed(0)}} {{row.custom.toFixed(2)}} {{row.D.toFixed(3)}} {{row.SN.toFixed(1)}} {{row.C.toFixed(2)}}
Inverse Distance Weighting (IDW) interpolation maps (power 2 · 200×200 grid · axes in offset meters · GeoTIFFs in UTM 33N / EPSG:32633 — set CRS manually in QGIS)
🗺

Map display and color palettes

Visible maps
Color palette per map
{{m.title}} Min: Max: