Technician Information for Timothy Trefz

First NameTimothy
Last NameTrefz
Technician ID03162

Associated Labs

Lab NameLab Lab Manager NameFull AddressLab Lab DistrictPage Alias
No results found.

Test Methods

California Test (CT) Certifications

Total 22 items.
Test MethodObtained DateExpiration DateStatusIA ResponsibleWithin Lab(s) ScopeComments
CT 105 Calculations - Gradings (JTCP - HMA I / S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 125 AGG Sampling - AGGREGATES (JTCP - HMA I / S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 201 Sample Preparation - Soil and Aggregates (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 202 Sieve analysis - Fine and Coarse Aggregates (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 205 Percent Crushed Particles (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 216 Relative Compaction - Soils and Aggregates (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 217 Sand Equivalent (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 226 Moisture Content - Soils and Aggregates (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 227 Cleanness Value (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 229 Durability (JTCP - S&A)2023-05-122026-05-12ExpiredDavid Medina(No lab)(No comments)
CT 231 Relative Compaction - Nuclear Gage 2024-11-152025-11-15ExpiredEd Gamboa(No lab)(No comments)
CT 504 Air Content of PCC - Pressure Method (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 518 Unit Weight - PCC (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 521.1 Compressive Strength - PCC (ASTM C39 / C617) 2024-11-152025-11-15ExpiredEd Gamboa(No lab) Created based on CT521 certificate ID86554
CT 521.2 Compressive Strength - PCC (ASTM C39 / C1231) 2024-11-152025-11-15ExpiredEd Gamboa(No lab)
Created based on CT521 certificate ID86554
CT 523.2 Section B.3 Flexural Strength (Lab Test) 2024-11-152025-11-15ExpiredEd Gamboa(No lab)(No comments)
CT 539 Sampling Fresh Concrete (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 540 Making Cylinders - PCC (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 543 Air Content of PCC - Volumetric Method (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 547 Bridge Profilograph 2023-12-052024-12-05ExpiredSarbjit Grewal(No lab)(No comments)
CT 556 Slump - PCC (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 557 Temperature - PCC (JTCP - PCC)2018-01-262023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)

AASHTO/ASTM Proficiencies