5.5 Is it ever necessary to conduct a hydrometer analysis when classifying soils according to the USCS, or is a sieve analysis always sufficient?

You have collected soil samples as part of the investigation for a dam project. The particle size distribution data for the four soil samples are shown in Figure 5.8 as curves H, I, J, and L. Soil H has a strong organic smell but contains no fibrous material. The other soils are non organic.

From your Atterberg limits tests on the -40 portion of these samples, you have obtained the following data