Field method

How a day works

1. Cone first. Park is already done. Put the traffic cone in front of the truck before you touch a well. Forgetting it is a write-up. You can still place it late.
2. Find the wells. Tap the map to walk. Stick-ups are obvious. Later sites hide wells under leaves, snow, or a flush-mount cover in the asphalt. Some piles are only piles.
3. Gauge. Hold the reel. The meter beeps at depth to water (DTW) and stops at depth to bottom (DTB). Water column is DTB minus DTW.
4. Set the purge. One well volume is water column times the casing factor. A 2-inch well is 0.163 gal/ft. A 4-inch well is 0.653 gal/ft. This program purges 3 well volumes. Show the math if you want the arithmetic. One or two volumes is the wrong call.
5. Set up and walk away. Peristaltic pump, tubing, purge bucket, then start. Gallons tick faster than a real pump so a day fits a break. The volume math is the real one. Other wells can be set up while a pump runs. That is the job.
6. Turbidity. Come back, confirm the gallons, and read NTU. Sample only at or past 3 well volumes and under the site limit (it is on the brief; the default is 5). Some wells clear slowly. Sampling short, or hot, or without a reading, is a penalty and the bottle is dumped.
7. Three VOA vials. Hold to fill. Release while the water sits in the green band: full, no headspace, no bubble. A miss means pour it out and do that vial again.
8. Label and ice. The label has to name the well you just sampled and the time on your log. Walk the set to the cooler. Leaving vials in your hand too long is a miss; they still count once iced.
9. Chain of custody. Copy well IDs, vial counts, and collection times from the field log. The first submit is what gets scored. Fix it until it matches, or the day doesn't close.

Stars. Finish the site to clear it and unlock the next. Three stars: at or under par, with at most one miss (a paperwork error counts). Two stars: four misses or fewer. One star: the cooler still got there. Progress stays in this browser only. Nothing is sent anywhere.

Controls. Tap or click the ground to walk. WASD or arrow keys move. E uses what's in reach. Space holds the reel or the vial. M mutes. Esc pauses. The clock on a timed site stops while the game is paused or while you're on the paperwork.