Soils Field Tester (SOF)
The CIT Program provides the following methods for obtaining certification:
1. Register for the Soils Field Tester class and pass the written and performance exams.
Prerequisite: Pass Basic Math test at least 30 days prior to the enrolled class date.
2. Register for Soils Field Tester Quiz Out/Recertification Exam and pass the written and performance exams. The Quiz Out/Recertification option allows a person to take the written and performance exams for initial certification or for recertification without attending class. If this option is chosen, the individual is expressing their knowledge and ability to perform test procedures without coaching. This option is recommended for individuals who have at least five years experience. The Soils Field Tester workbook will be mailed to the address on the registration.
KDOT requires this course for persons who are testing soils to determine quality and acceptability.
- Find a representative sample/total supply by reducing a large field soil sample to a smaller one
- Learn standard compaction testing and moisture content
- Understand how to prepare the sample for testing and complete calculations for all tests
- Determine density of soil in-place by using the Sand-Cone method and moisture content of soil using calcium carbide gas pressure tester "Speedy Meter"
- Find the liquid limit of soil using the multi-point and the single point method
- Determine the plastic limit and the plasticity index
- Learn 12 classifications of soil, practice the description/identification of soils visually and/or manually
Workbook included in course fee
Exam: The class and quiz/out recertification options require a written exam and a performance exam.
Score: A score of 60% on each portion of the written exam plus a 70% overall score is required to pass.
If three or less performance sub tests are failed, only the sub test failed must be retaken. If four or more sub tests are failed, all performance sub tests must be retaken.