These sample tubes with the clamps are prepared and owned by Lamont-Doherty Earth Observatory.
The empty tubes are shipped directly to the project office .
Both the USGS and Lamont Doherty seek to maintain high standards for collection of all samples and encourage sample collectors to seek training.
Safety-coated 500cc glass bottles with polycone seals are recommended for the tritium sample, though high-density polyethylene bottles with polycone seals may be substituted.
Prior to turning the bolts, the entire line from the well through the copper sample tube should be tapped to dislodge any gas bubbles that may be in the line or copper tube.