See estimated H2S plume zones and nearby roads
Register your wells once. In a release or a drill, enter the wind from a phone and get the plume, the Rule 36 radius, the roads in the way and when gas reaches them, all saved as a record your team can act on.
Synthetic well and road geometry over aerial imagery. Figures are real output from the H2S Release plume model for a 2,000 ppm well on a clear night with a 2.5 mph wind.
How it works
- 1
Register each source once
Add your wells and facilities with H2S concentration and escape volume. The Rule 36 radius of exposure is calculated as you type.
- 2
Enter the wind
In a release or a drill, pick the source and enter wind speed, direction, time of day and sky. The plume, roads and radius draw on a satellite map.
- 3
Save it and act
Save the snapshot as a record that can't be edited, share the summary, and raise a corrective action that links back to it.
What you get on one screen
Plume zones you can read at a glance
How far 500, 100 and 10 ppm reach downwind, with a ±22.5° wind-swing wedge, stability picked from your conditions, and a near-calm warning when the model stops being reliable.
Rule 36 radius and contingency check
100 and 500 ppm radius of exposure circles on the map, and a check that names the public road or place that puts you in contingency-plan territory.
Roads in the plume, with estimated arrival times
Nearby roads come in from OpenStreetMap and are colored by expected concentration, grouped by street, with the closest distance and when gas arrives.
Homes, public areas and lease entrances
Tap the map to mark the places that matter to you and get an estimate at each one. Lease roads missing from public maps can be marked the same way.
A saved record of every snapshot
Each snapshot keeps its inputs, map and results exactly as they were, with share-ready text for a text message or an email to the field.
Corrective actions linked both ways
One tap turns a snapshot into a high-risk corrective action in BasinCheck, and the action links back to the snapshot it came from.
Free calculator or H2S Release?
The free H2S radius of exposure calculator gives you a one-off Rule 36 radius of exposure estimate. H2S Release adds wind plume estimates, saved sources and records your team can review together.
| Capability | Free calculator | H2S Release |
|---|---|---|
| Rule 36 100 and 500 ppm radius of exposure | Yes | Yes |
| Wells and facilities saved for your team | No | Yes |
| Nearby roads checked automatically, with arrival times | No | Yes |
| Saved snapshots you can go back to | No | Yes |
| Corrective actions raised from a snapshot | No | Yes |
What it is, and what it isn't
H2S Release is a screening estimate. It models a continuous ground-level release as a Gaussian plume over flat, open ground with a steady wind, and checks a wind swing of one compass point either side. Use it to review a planning scenario, brief a crew or record a drill.
It does not model terrain, buildings or shifting winds, and it does not replace gas monitors, your H2S contingency plan or your emergency response procedures. Use it to see quickly which roads, homes and lease entrances to check and warn, and keep a record of what you knew when you decided.
H2S Release questions
Request beta access
H2S Release is turned on per organization while it's in beta. Tell us a little about your sites and we'll reply by email to set it up for your team.