About Alpha

Alpha Geotechnical and Materials, Inc. is a local consulting firm specializing in geotechnical and environmental engineering, geological services, and construction inspections and materials testing. Founded in 1998, Alpha is now owned and operated by three long time employees. Alpha provides services to a wide variety of public and private clients, and we work on a wide range of projects from small single commercial pads to large master-planned communities. We have developed strong relationships with our clients by providing superb customer service and reliable timely reports. Through these partnerships, we have found success and growth.

Our Mission: To deliver timely, accurate, cost effective test results to our clients using the latest innovative methods, while providing our employees a place to learn and grow.

Our Team

Carrie Weaver


Alf Wold

P.E., Vice-President of Operations

Bill Sprague


Alpha Geotechnical

2504 W. Southeren Avenue

Chet Pearson


Garrett clatanoff


Michelle fowler


Holly Land


Our Services

Geotechnical Engineering

  • Site Investigation
  • Foundation, Pavement, and Earthquake Engineering
  • Excavation Conditions
  • Earth Slopes and Embankments
  • Retaining Walls (ADD)
  • Buried Structures
  • Soil Improvement
  • Erosion Control
  • Geologic Hazard Evaluation
  • Slope Stability

Geotechnical Testing

  • Field Density Determination
  • Density of Undisturbed Samples
  • Atterberg Limits
  • Moisture-Density Relationship
  • Expansion / Consolidation
  • Permeability Testing
  • Percolation Testing
  • Corrosivity Testing
  • Direct Shear Testing
  • R-Values

Concrete Testing

  • Sampling of plastic concrete
  • Slump testing of plastic concrete
  • Unit weight and Yield of plastic concrete
  • Air content by the volumetric method
  • Air content by the pressure method
  • Temperature of plastic concrete
  • Making and Curing of concrete cylinders
  • Coring of cylindrical specimens
  • Locating rebar utilizing the R Meter (Pachometer)
  • Schmidt Hammer testing of hardened concrete
  • Special Inspection of Reinforced concrete
  • Measurements of vapor transmission through hardened concrete
  • Floor Flatness / Levelness Testing
  • Pull testing of rebar / epoxy bolts / all thread
  • Compressive strength of concrete cylinders (laboratory test)
  • Flexural strength of concrete (laboratory test)

Soils or Aggregate Testing

  • Field Density determination by the nuclear gauge, sandcone, or large sandcone (12" diameter) methods
  • Sieve Analysis
  • Atterberg Limits or Plasticity Index (laboratory test)
  • Moisture-Density Relationship or Proctor determination (laboratory test)
  • Expansion Index (laboratory test)
  • pH and Resistivity testing (laboratory test)
  • Direct Shear Testing (laboratory test)
  • Swell Testing (laboratory test)
  • One dimensional consolidation (laboratory test)
  • Triaxial Permeability testing of cohesive soil (laboratory test)
  • Specific Gravity and Absorption of aggregate (laboratory test)
  • Unit Weight of Aggregate (laboratory test)
  • Fractured Face Count (laboratory test)
  • Sand equivalent (laboratory test)
  • Flat and Elongated Particles (laboratory test)

Asphaltic Concrete Testing

  • Field Density determination by the nuclear gauge method (thin lift gauges)
  • Coring of cylindrical specimens
  • Extraction and Gradation (laboratory test)
  • Unit weight and Thickness of cylindrical specimens (laboratory test)
  • Maximum Specific Gravity or Rice test (laboratory test)
  • Stability and Flow test (laboratory test)
  • Tensile Strength Ratio (laboratory test)
  • Marshall testing (laboratory test)
  • Determination of laboratory air voids of asphaltic concrete (lab test)
  • Determination of in-place air voids of asphaltic concrete (laboratory test)

Grout, Mortar and Concrete Masonry testing

  • Sampling of plastic grout and mortar
  • Slump testing of plastic grout
  • Temperature of plastic grout
  • Making and Curing of grout prisms
  • Making and Curing of mortar prisms or cylinders
  • Locating rebar utilizing the R Meter (Pachometer)
  • Special Inspection of Concrete Masonry Construction
  • Compressive strength of Grout (laboratory test)
  • Compressive strength of Mortar (laboratory test)
  • Compressive strength of Concrete Masonry Units (laboratory test)

Enviornmental Services

  • Phase I, II, and III Enivrionmental Site Assessments
  • Pesticide and Herbicide Screenings
  • Asbestos and Lead Based Paint Surveys
  • Environmental Compliance Audits and Plans
  • Indoor Air Quality Assessments
  • Underground Storage Tank (UST) Corrective Actions and Closure
  • Septic, Drywell, and Groundwater Well Assessments and Closures
  • Soil/Groundwater Investigation and Remediation
  • Soil-Gas Surveys
  • Forensic / Expert Witness Work
  • Stormwater Polution Prevention Plans (SWPPPs)
  • Spill Prevention Countermeasure and Control (SPCC) Plans
  • Environmental and Air Permitting

Geological Services

  • Percolation Testing
  • Earth Fissure Evaluations
  • Seismic Surveys
  • Rock Slope Evaluations
  • Evaluation of Seismic Site Class
  • Groundwater Evaluations
  • Rip Rap Observation and Testing

Contact Us

  • Alpha Geotechnical & Materials, Inc.
    2504 West Southern Avenue
    Tempe, Arizona 85282
  • (602) 453-3265

  • Work With Us!

    Alpha is always seeking to hire the best and brightest engineering minds
    and support staff!
    Email your resume to info@alphageotech.com