Technician Information for Timothy Trefz

First NameTimothy
Last NameTrefz
Technician ID03162

Associated Labs

Total 4 items.
Lab NameManager NameFull AddressDistrictPage Alias
CT D10 - Cherokee Field LaboratoryMandeep Dhesi3256 Tomahawk Drive, Stockton, CA 9520510Lab 1
CT D10 - Merced Field LaboratoryMandeep Dhesi1801 Motel Drive, Merced, CA 9534110Lab 2
CT D10 - Sonora Field LaboratoryMandeep Dhesi19596 Mono Way, Sonora, CA 9537010Lab 3
CT D10 - Ione Field LaboratoryMandeep Dhesi315 Depot Road, Ione, CA 9564010Lab 4

Test Methods

California Test (CT) Certifications

Total 22 items.
Test MethodExpiration DateStatusIA ResponsibleWithin Lab(s) ScopeComments
CT 504 Air Content of PCC - Pressure Method (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 518 Unit Weight - PCC (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 539 Sampling Fresh Concrete (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 540 Making Cylinders - PCC (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 543 Air Content of PCC - Volumetric Method (JTCP - PCC)2023-01-26ExpiredBiplab Bhattacharya(No lab)(No comments)
CT 556 Slump - PCC (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 557 Temperature - PCC (JTCP - PCC)2023-01-26ExpiredBiplab BhattacharyaLab 1, Lab 2(No comments)
CT 231 Relative Compaction - Nuclear Gage 2024-11-02ActiveSarbjit GrewalLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 521.2 Compressive Strength - PCC (ASTM C39 / C1231) 2024-11-02ActiveEmily Merritt(No lab)
Created based on CT521 certificate ID86554
CT 521.1 Compressive Strength - PCC (ASTM C39 / C617) 2024-11-02ActiveEmily Merritt(No lab) Created based on CT521 certificate ID86554
CT 523.2 Section B.3 Flexural Strength (Lab Test) 2024-11-02ActiveSarbjit Grewal(No lab)(No comments)
CT 547 Bridge Profilograph 2024-12-05ActiveSarbjit Grewal(No lab)(No comments)
CT 105 Calculations - Gradings (JTCP - HMA I / S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 125 AGG Sampling - AGGREGATES (JTCP - HMA I / S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 201 Sample Preparation - Soil and Aggregates (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 202 Sieve analysis - Fine and Coarse Aggregates (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 205 Percent Crushed Particles (JTCP - S&A)2026-05-12ActiveDavid Medina(No lab)(No comments)
CT 216 Relative Compaction - Soils and Aggregates (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 217 Sand Equivalent (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 226 Moisture Content - Soils and Aggregates (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 227 Cleanness Value (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)
CT 229 Durability (JTCP - S&A)2026-05-12ActiveDavid MedinaLab 1, Lab 2, Lab 3, Lab 4(No comments)

AASHTO/ASTM Proficiencies