SP16 Groundwater Sampler Patent No. 5,612,498
The
Screen Point 16 groundwater sampling system was the most widely used
direct push system for environmental groundwater investigations for several
years. Since then, Geoprobe Systems® has retired the Screen Point 15 system and introduced the Screen Point 16
system (1.6 in. OD screen sheath) which is designed for use under the
more powerful GH60 hammer with the heavier 1.5 in. probe rods. These protected
screen samplers have only five parts, including the grout plug, plus a
few O-rings. Using either of these tools with O-rings on the rod fittings
enables you to collect representative groundwater samples from a discrete
interval using a bailer, bladder pump, or other device. The length of
the screen exposed to the formation can be set from just a few inches
to as much as 41-inches to let you select the sampling zone. Additionally,
the same screens (Stainless Steel or PVC) can be used in both samplers.
The grout plug at the base of the screen makes it possible to conduct
bottom-up grouting with bentonite slurries or neat cement using any of
the Geoprobe® GS Series
grout machines. A printed standard operating procedure (SOP) for the
SP16 samplers is available free upon request.
Technical Bulletin MK3142.
The Screen Point 16 Groundwater Samplers are used to collect groundwater samples from unconsolidated materials at depths ranging from near ground surface to over 100 feet below grade. The depth that can be reached with the SP16 samplers is a function of the equipment and methods being used to advance the sampler (manual, static vehicle weight, or percussion probing), the formation being penetrated, and operator experience.
Screen Point 16 Advantages:
- Completely sealed during driving
- Stainless steel or PVC screen
- Actual interface samples
- 41-in. exposed screen length
- Fast recharge from formation
- Samples recovered using Tubing Check Valve, Mini-bailer or 0.5 in. Bladder Pump
- Durable Drive Head and Corrosion Resistant Sampler Sheath
- Sample both dissolved compounds and NAPLs
- Built to withstand percussive probing
- Screen sheath forms mechanical annular seal above the screen while sampling
Screen
Point 16 Groundwater Sampler Kit
Disposable
PVC Screens Available for the Screen Point Series Groundwater Samplers
Add GeoprobeŽ brand disposable screens to your
groundwater sampling arsenal. The PVC screens are the same dimensions
as their stainless steel counterparts, but are made to be left downhole.
By using these screens, decontamination time is reduced, especially when
used at sites with high contaminant concentrations. The 45-inch
long PVC screens have a 1.05 in. OD, 0.78 in. ID, and have
two rows of 0.010 in. slots spaced at 0.125 in. intervals (approx. 8 slots
per inch).