Afrildo Iko Syahrial

Project Geophysicist


Master of Science, Civil & Environmental Engineering, 2008, San Diego State University, San Diego, California

Bachelor of Science, Civil Engineering, 2005, Brawijaya University, Indonesia


OSHA 40-Hour Health and Safety Training (with annual updates)

Refinery Safety Overview (RSO)

Los Angeles Clean Card (LACC)

Loss Prevention Systems (LPS)


AutoCAD, EarthImager, MagMap, MathCAD, Matlab, Microsoft Office, Pathfinder, Photoshop, Radan, SAP, SeisOpt Pro, SIPwin, Surfer


Mr. Syahrial’s experience includes managing and performing geophysical studies including electromagnetic, magnetic, ground penetrating radar, seismic, and high resolution electrical resistivity surveys. Responsibilities include managing staff, processing data, preparing project reports and creating site data maps using AutoCAD and Surfer. He has over 6 years of experience in conducting geophysical evaluations for such projects as schools, medical centers, refineries, pipelines, transportation corridors, and landfills.Specific geophysical projects include:

  • Correia Middle School, San Diego, California: ProjectGeophysicist during the evaluation of underground utilities at the school property. The purpose of the study was to locate detectable underground utilities at the school site for the creation of as-built drawings depictingthe underground lines. A GSSI SIR 3000 ground penetrating radar (GPR), Geonics EM61 time domain instrument, Fisher M-Scope Pipe and Cable Locator, Schonstedt magnetic gradiometer, and RD8000 line tracer were used as part of the study.
  • Monte Vista Borrow Pit Slope Failure, Rancho San Diego Area of San Diego County, California: Project Geophysicist providing geophysical consulting services pertaining to the evaluation of the Monte Vista Borrow Pit Slope Failure. The project included the collection of P-wave refraction data along five seismic traverses located within and outside the failure area. Data were processed and analyzed using SIPwin and SeisOpt Pro. Tomography images of the failure area were generated revealing the vertical and lateral limits of slide debris and the depth to competent bedrock. The results were presented in an illustrated project report. Project challenges included very steep slopes and loose surficial soils.
  • NAVFAC/NASNI, Coronado, California: Senior Staff Geophysicist for the detection and delineation of two JP-5 pipelines, high point vents, low point strippers, and valve pits along a 3½-mile alignment at the North Island Naval Air Station. The survey included the use of GPR, pipe and cable locators, line tracers, and gradiometer. The finding from our survey were marked on the ground surface and mapped with a Trimble Pro XRS GPS.
  • Campo Propane Distribution, San Diego County, California: Senior Staff Geophysicist for the geophysical evaluation of potential obstructions including utilities along several hundred feet of proposed underground propane lines at and near the Juvenile Rehabilitation Center in the Campo area of San Diego County. The specific purpose of our evaluation was to assess the presence of detectable underground utilities and lines, as well as other subsurface structures in the proposed trenching areas. The survey included the use of a Geonics model EM61 time domain instrument, Fisher M-Scope TW-6 pipe and cable locator, RD8000 line tracer, Schonstedt magnetic gradiometer, and GSSI SIR 3000 GPR unit using a 400 MHz transducer.
  • UST Search, Southern California: Senior Staff Geophysicist for survey services and geophysical analysis for the evaluation of numerous potential underground storage tank (UST) sites throughout southern California. Sites have included former gasoline service station sites, active fueling stations, industrial properties, and maintenance facilities. Services typically included conducting EM and/or magnetometer surveys across the site as well as GPR. In addition, line tracer methods were also used to detect product lines. The results were marked on the ground and presented in written illustrated reports.