What to Record on the Boring Log for a Failed Standard Penetration Test?

What would you record on the boring log if the sampler sank prior to any hammer strikes during a standard penetration test?

On the boring log, you would record that no hammer strikes were performed and the sampler sank without resistance.

In a standard penetration test (SPT), the drilling crew sets up their equipment to measure the standard penetration resistance of the soil. This involves lowering the sampler into the ground, connecting the rods, and seating the hammer. However, in the given scenario, the sampler sank prior to any hammer strikes. This indicates a failed test, as the sampler should have been driven into the ground by the hammer.

On the boring log, the drilling crew would record this failed test by indicating that no hammer strikes were performed and the sampler sank without resistance. This information is important for accurately documenting the results of the test and analyzing the soil conditions.