Level 1C Level 1C Certification is a one-day certification course that certifies an individual’s ability to sample and test aggregates according to TxDOT Test Procedures and Specifications. There is no demonstration or training; individuals must come prepared to pass examinations of associated test procedures through demonstration, verbal and practical methods. Once the evaluations are successfully completed, a final written examination is administered. A score of 80% or higher is necessary to obtain certification. This class is not a required course or pre-requisite for other courses. Test Procedures covered: Tex107-E, Determining the Bar Linear Shrinkage of Soils Tex-200-F, Sieve Analysis of Fine and Coarse Aggregates (Part 1 & 2) Tex-203-F, Sand Equivalent Tex-212-F, Determining Moisture Content of Bituminous Mixtures (Part 2) Tex-217-F, Determining Deleterious Material and Decantation Test for Coarse Aggregates Tex-221-F, Sampling Aggregate for Bituminous Mixtures, Surface Treatments and LRA Tex-224-F, Determinig Flakiness Index Tex-280-F, Determining Flat and Elongated Particles Tex-400-A, Sampling Flexible Base, Stone, Gravel, Sand and Mineral Aggregates Tex-401-A, Sieve Analysis of Fine and Coarse Aggregate Tex-402-A, Fineness Modulus of Fine Aggregate Tex-406-A, Decantation Test for Concrete Aggregate Tex-408-A, Organic Impurities in Fine Aggregate Tex-413-A, Determining Deleterious Material in Mineral Aggregate Tex-460-A, Determining Crushed Face Particle Count Tex-461-A, Degradation of Coarse Aggregate by Micro-Deval Abrasion Re-certification Every three (3) years all Level 1C Aggregate Specialists are required to re-certify unless they have been certified for nine consecutive years. Re-certification consists of attending the one-day certification class. A Specialist can re-certify up to one year prior to the expiration date. If certification expires the specialist may not perform any Level 1C responsibilities on a TxDOT project and will be required to attend a Level 1C Certification class to re-certify.