Disturbed soil sampling requires proper handling and storage of samples to accurately determine soil properties and structure. Samples must be clearly labelled during collection to avoid confusion later. Correct labelling and storage, such as in moisture-tight containers with wax coating, prevents changes to properties prior to testing. Proper filing of soil samples and data allows for better organization and control over the testing process.

1. Geotechnical Engineering
Laboratory 1
Disturbed Soil Sampling,
Labelling and Storage

2. Objective:
To obtain soil sample and proper handling and
storage for testing.

3. Discussion:
Disturbed soil sampling is an important factor
in the determination of the properties of soil. The
correct method of sampling will lead to more
accurate results in the determination of soil
properties and structure. The storage of a sample,
after it has been obtained, is as important as sampling
itself. If the storage is not done adequately it will lead
to a change in some of the properties of the sample.
The labelling of a sample is necessary for easy
identification of the sample and to avoid confusion if
different persons undertake the sampling and testing
ofthe soil sample. A better filing of soil samples will
also mean better control of data acquisition.

4. Apparatus:
1. Soil auger
2. Spade or shovel
3. Moisture tight sample
containers
4. Petrowax or paraffin

5. Procedure:
1. Clear the area of grass and vegetation where the
sample is to be obtained.
2. With the use of soil auger, the soil is bored until
desired depth is reached and obtain a disturbed
sample.
3. Record the depth of each type of soil strata.
4. If an undisturbed sample is to be obtained a large
hole should be dug but the middle portion of the
hole ig not taken out.
5. Trim the middle portion of the soil until exact size is
obtained. Make sure that the sides are enclosed in a
container to prevent crumbling.

6. 7. Place a cover of paraffin wax or other means of
covering on the sample. Classify and label the
sample.
8. Place the soil in a container with adequate space
such as canvass, bags, cans and bins for large
quantities and glass jars for small samples.
9. Place a label on sample and prepare the
corresponding sample data for filing purposes. .
10. For disturbed sample, cover sample with petrowax
or parafin after it has been placed in a container.
11. Store sample in a cool room.
12. Plot the soil profile based on the record of each
group.