There's no federal law requiring a specific well cap. Every state writes its own rules. That's why a driller who works in three states might need three different cap setups on the truck. The EPA regulates public water systems under the Safe Drinking Water Act, but private wells? Those fall...

A monitoring well on a construction site in New Jersey. No lock on the cap. Somebody drops a cigarette butt in. Now your next round of groundwater samples is compromised and your client is explaining the anomaly to the DEP. It sounds like a worst-case scenario, but we hear versions...