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 as part of an R&D project commissioned by Eni Rewind.

Developers: Nicolò Tonolo, Iason Verginelli
University coordinator: Renato Baciocchi
Eni Rewind coordinators: Camilla Lanari, Federico Villani



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, and Eni Rewind 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: