Groundwater Sampling
Groundwater Sampling
Screen Point 15 & 16
The Screen Point (SP) system is a protected screen, direct push groundwater sampler for use in unconsolidated materials. Its watertight design eliminates the threat of formation fluids entering the screen before deployment and ensures higher sampling integrity than conventional samplers.
Advantages
• 41-inch (1041 mm) exposed screen length allowing fast recharge from the formation
• Sampler is completely sealed during driving
• Large 1.0-inch outside diameter screen allows the user to deploy either mini-bailers or tubing with bottom check valves into the bore of the screen for sampling both dissolved compounds and non-aqueous phase liquids (NAPLs)
• Can be used to sample floating layers (LNAPLs) and sinking layers (DNAPLs)
• "Groutable" design allows abandonment grout to be pumped through sampler to meet ASTM Method D 5299-92 requirements
Groundwater Profiler
The Groundwater Profiler enables you to conduct vertical profiling of groundwater quality from a discrete interval using 6-in. or 12-in. screens. The Profiler also allows the field operator to conduct hydraulic conductivity tests (e.g. slug tests) at each sampling depth to determine contaminant flow paths. Profiling can be conducted to determine vertical distribution of contaminants, especially in sandy or coarser-grained aquifers, as the tool is advanced incrementally into the formation.
Advantages
• Sample at multiple depth intervals without removing/reinstalling the sampler for each depth
• Stainless steel screen has a 0.004" slot to assist with development and to provide high-quality samples
• Tubing can be used to isolate the sampled water from stagnant water inside the drive rods thus improving sample quality
• Bottom-up pressure grouting may be conducted to meet abandonment requirements
Mill Slotted Well Point
This is an excellent tool for use in finding where your water table is. With the ability to push and pull throughout the column, this tool simplifies groundwater sampling and profiling. 
SPT hammer
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CME Automatic Hammer Operations Bulletin DSO-99-03
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STANDARD PENETRATION TEST
Subsurface Exploration Using the Standard Penetration Test and the Cone Penetrometer Test
Subsurface Exploration Using the Standard Penetration Test
Site Exploration, Site Characterization, Subsurface Exploration, Drilling, Standard Penetration Test, Cone Penetrometer
The Standard Penetration Test (SPT) and Cone Penetrometer Test (CPT) have become industry standards for subsurface geotechnical investigations using small diameter (<8-in. [20-cm]) borings and soundings. Both procedures have evolved over a period of 100 and 70 years, respectively, and have been adopted as ASTM standards. Each procedure has certain advantages over the other, but both can elicit incorrect data under particular subsurface conditions that are often overlooked, depending on the experience of field personnel operating or logging the tests. This paper seeks to explain the operative assumptions employed in both procedures, highlight the various corrections that are commonly employed, and warn the reader of common errors in interpretation.
The article concludes by stating that, under most conditions, the joint employment of SPT and CPT together has the greatest potential for characterizing sites correctly.
ASTM D1586 - 11
Standard Test Method for Standard Penetration Test (SPT) and Split-Barrel Sampling of Soils
For more information please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
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