Solinst - Model 615 -Drive-Point Piezometer

The Model 615 Drive-Point Piezometer is designed as an affordable method to monitor shallow groundwater and soil vapor in suitable conditions.

The Drive-Points attach to inexpensive 3/4" (20 mm) NPT stainless steel drive pipe. The Drive-Points are designed for single use installations, and not for removal and reuse. Solinst Drive-Point Piezometers are most often installed as permanent well points. They can also be used for temporary, short term monitoring applications.

Higher quality samples can be obtained when polyethylene or PTFE-lined tubing is attached to the stainless steel drive-point. Groundwater sampling and hydraulic head measurements can be taken within the tubing using small diameter equipment, as described here.

Solinst Drive-Point Piezometers can be driven into the ground with any direct push or drilling technology, including the Manual Slide Hammer shown at right. To avoid clogging or smearing of the screen during installation, a shielded version is also available.

615 ML ports provide the option for multilevel monitoring for up to 6 zones in one drive.

• High-resolution vertical profiling
• Groundwater sampling, including VOCs
• Multilevel groundwater monitoring
• Water level monitoring
• Base flow monitoring in stream beds
• Contaminant plume delineations
• Soil gas sampling
• UST monitoring
• Low cost and minimal disturbance site assessment
• Sparge points
• Vertical stratigraphy profiling

Model 615 Drive-Point Piezometers have a stainless steel, 50 mesh cylindrical filter-screen (100 mesh for ML), within a 3/4" (20 mm) stainless steel drive-point body, screen support and an optional fitting for attachment of sample tubing.

The 615 N or 615 SN, designed without a tubing barb, is to be used for water level measurements. This saves money and provides better access for Water Level Meters.

The 615 or 615 S has an inner barbed fitting for 5/8" OD x 1/2" ID (16 mm x 12 mm) LDPE or PTFE-lined sample tubing. This prevents sample water from contacting the extension rods, and maintains high sample integrity, even when inexpensive galvanized steel extensions are used.

The 615 C is ideal for soil vapor sampling. Where an air-tight connection is most desirable, the compression fitting option allows users to attach 1/4" OD (6 mm) sample tubing directly to the top of the screened portion of the drive-point.

The 615 S and 615 SN shielded drive points have a single use, 1-1/2" (38 mm) dia. shield to avoid smearing and plugging of the screen during installation. The strengthened connector at the top of the drive-point acts as an annular seal, which avoids contamination from higher levels in the hole.

The 615 ML Multilevel Drive-Point Ports have a dual barb stem to allow the connection of 3/8" OD (9.5 mm) or 1/4" OD (6 mm) tubing. The 615 ML uses the same couplings and extensions as the standard 615 Piezometers, but with a Drive-Point Tip to thread onto the first extension, or Port. Formation water enters the port, passes into the stem, and up into the monitoring tube attached to the stem to its static level. The 615 ML is also a good option for high resolution profiling of soil gas, or groundwater.

For the most inexpensive wellpoint installations, the Manual Slide Hammer can be used to install the Solinst Drive- Point Piezometers. The 21lb (9.5Kg) slide hammer and all other equipment can easily be transported in a car or truck to most sites.

A heavy duty drive head is used, on which the slide hammer impacts, and a tubing by-pass ensures that the tubing does not get damaged during installation.

Solinst supplies 3/4" NPT Delrin caps, and stainless steel couplings and extensions. These accessories can also be locally sourced at plumbing and hardware stores.

1" to 3/4" reducer couplings are available for installing a Levelogger in a section of 1" extension pipe (NPT and BSPT options).