Great news in the world of no-purge groundwater sampling!
The largest environmental testing lab in the United States, Test America, has started a Lower Sample Volume Initiative (LVI) the details of which can be found here:
Test American Lower Sample Volume Initiative Introduction
Sample volume has always been the biggest obstacle for HydraSleeve use in many applications. Programs such as their Lower Sample Volume Initiative will open the door for HydraSleeve use at sites where standard sample volume requirements would not allow their use in the past. Of all the no-purge samplers HydraSleeves collect the largest volume possible and provide more sample volume per dollar.
Once again, we would like to stress that it's definitely worth talking to YOUR lab about reducing their sample volume requirements when possible!
Please This email address is being protected from spambots. You need JavaScript enabled to view it. if you need help with the negotiations. We can send you an independently developed (by the ITRC) Minimum Sample Volume Requirement Spreadsheet.
So, how much sample volume can be obtained from our HydraSleeves?
The chart below shows the maximum amount of volume which can be obtained considering these factors:
1. No spillage
2. Be sure not to use the water that collects on top of the check valve
| HYDRASLEEVE DESCRIPTION | PART NUMBER | MAXIMUM SAMPLE VOLUME | COST | COST/LITER |
| Standard 2-inch HydraSleeve | HS-2 | 600 MLS | $23 | N/A |
| Standard 2-inch, 1-liter HydraSleeve | HS-2-1L | 1.3 L | $32 | $25 |
| SuperSleeve 2-inch, 1-liter | HDSS-1L | 1.0 L | $21 | $21 |
| SuperSleeve 2-inch, 2-liter | HDSS-2L | 2.0 L | $25 | $12 |
| Standard 4-inch, 2-liter HydraSleeve | HS-4-2L | 3.1 L | $40 | $13 |
These sample volumes may vary slightly, but this is typical if the above steps are followed.
So why do our part numbers and paperwork vary from the amounts found here? We always quote conservatively when quoting sample volumes in our paperwork. This is to account for new users who may have spillage, and those who cannot obtain all of the water from inside the HydraSleeves. Please note that some of the larger HydraSleeves can be more difficult to decant and therefore the amount we quote in our paperwork varies even more than the smaller HydraSleeves which are easier to decant. With continued experience using HydraSleeves and decanting samples, the amount you actually collect will likely increase over time.