Technician Information for Ralph Tan

First NameRalph
Last NameTan
Technician ID03602
Print Certificates

Associated Labs

Total 2 items.
Lab NameManager NameFull AddressDistrictPage Alias
ENGEO, IncorporatedDerek Seibold3420 Fostoria Way, Suite E, Danville, CA 945264Lab 1
ENGEO, IncorporatedDonny Bryant17278 Golden Valley Parkway, Lathrop, CA 9533010Lab 2

Test Methods

California Test (CT) Certifications

Total 16 items.
Test MethodExpiration DateStatusIA ResponsibleWithin Lab(s) ScopeComments
CT 125 AGG Sampling - AGGREGATES 2025-10-26ActiveEd GamboaLab 1, Lab 2(No comments)
CT 125 AGG Sampling - AGGREGATES (JTCP - HMA I / S&A)2024-11-05ActiveIgnocencio HerreraLab 1, Lab 2(No comments)
CT 125 GEN Sampling - GENERAL 2023-11-05ExpiredIgnocencio HerreraLab 1, Lab 2(No comments)
CT 125 HMA Sampling - HMA 2025-10-26ActiveEd GamboaLab 1, Lab 2(No comments)
CT 125 HMA Sampling - HMA (JTCP - HMA I)2024-11-05ActiveIgnocencio HerreraLab 1, Lab 2(No comments)
CT 231 Relative Compaction - Nuclear Gage 2025-10-26ActiveEd GamboaLab 1, Lab 2(No comments)
CT 375 AC Density by Nuclear Gage 2025-10-26ActiveEd GamboaLab 1, Lab 2(No comments)
CT 504 Air Content of PCC - Pressure Method (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 518 Unit Weight - PCC (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 523.1 Section B.1 & B.2 Flexural Strength (Field Fabrication) (JTCP - PCC)2028-09-22ActiveFirooz Ahmad Hosainy(No lab)(No comments)
CT 533 Ball Penetration - PCC 2024-04-12ExpiredEd GamboaLab 1, Lab 2(No comments)
CT 539 Sampling Fresh Concrete (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 540 Making Cylinders - PCC (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 543 Air Content of PCC - Volumetric Method (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 556 Slump - PCC (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)
CT 557 Temperature - PCC (JTCP - PCC)2028-09-22ActiveFirooz Ahmad HosainyLab 1, Lab 2(No comments)

AASHTO/ASTM Proficiencies