Special Inspections

  • Soil Percolation Test – Drainage Disposal Systems
  • Double Ring infiltration testing (ASTM D3385)
  • Soil Percolation Test – Sewage Disposal Systems
  • Ultrasonic Inspection
  • Magnetic Particle Inspection
  • Liquid Dye Penetrant Inspection
  • Industrial Radiographic Inspection
  • High-Strength Bolting
  • Metal Decking
  • Shop/Field Welds
  • Structural Cold-Formed Steel
  • Concrete Precast
  • Masonry
  • Subsurface Conditions-Subgrade Inspection
  • Subsurface Conditions-Fill Placement & In-Place Density
  • Subsurface Investigations
  • Helical Piles
  • Vertical Masonry Foundation Elements
  • Underpinning
  • Footing and Foundation
  • Coefficient of friction test (slip test)
  • Lowest Floor Elevation
  • Moisture vapor emission rate test
  • Moisture testing (drywall, concrete, wood)
  • Light Pole Testing (Paint Thickness)

Construction Materials Testing (CMT)

  • Concrete Testing & Sampling Inspections
  • Relative Humidity (RH) of Concrete
  • Reinforcing Steel Inspection & Rebar Locator
  • Floor Flatness
  • Masonry Mortar & Grout Sampling & Testing
  • Compressive Strength Testing of Concrete, Masonry Units & Masonry Prisms
  • Tensile Strength
  • Soil compaction
  • Visual Proof Rolls
  • Soil Bearing Capacity
  • Windsor Probe Testing
  • Swiss Hammer Testing
  • Pullout Strength of Hardened Concrete (ASTM C900)
  • Concrete Core Testing & Sampling
  • Modulas of Elasticity
  • Chloride Ion Penetration
  • Bituminous Paving Plant & Field Inspections
  • Caisson Inspections
  • Test Pits
  • Soil Borings
  • Sinkhole Inspections
  • Atterberg Limits (ASTM 4318)
  • Grain Size/Gradation:
    • Hydrometer Analysis (ASTM D422)
    • Sieve Analysis (ASTM C136)
    • Material Finer than No. 200 (ASTM D1140)
  • Moisture Density Relations of Soils – ASTM D698 (Standard Proctor)
  • Moisture Density Relations of Soils – ASTM D1557 (Modified Proctor)
  •  Soil Classification (AASHTO, UNIFIED, FAA, Visual)
  • Laboratory Determination of Moisture Content of Soil and Rock (ASTM D2216)
  • pH of Soils (ASTM D4972)
  • Organic Content by Loss of Ignition (AASHTO T267)
  • Permeability of Granular Soils (Constant Head), (ASTM D2434)
    • Hydraulic Conductivity of Saturated Porous Materials using a Fleixible Wall Permeameter (ASTM D5984)
  • Specific Gravity of Soil Solids (ASTM D854)
  • Bulk Specific Gravity of Compacted Asphalt Mixtures (AASHTO T166)
  • Specific Gravity & Absorption of Fine Aggregate (ASTM C128)
  • Specific Gravity & Absorption of Course Aggregate (ASTM C127)
  • Relative Density (ASTM D4254 & ASTM D4253)
  • Percent Air Voids in Compacted Dense Bituminous Paving Mixture (ASTM D3203)
  • Extraction of Bitumen for Bituminous Paving Mixtures (ASTM D2172) Bitumen Content, %
  • Thickness of Compacted Bituminous Mixture Specimens (ASTM D3549)
  • Maximum Theoretical Gravity (Rice Method), (AASHTO T209)
  • Density of In-Place Samples (Cores), (AASHTO T166)
  • Los Angeles Abrasion and Impact Test (AASHTO T96)
  • Soundness of Aggregate Test (AASHTO T104)
  • California Bearing Ratio (Laboratory Compacted), ASTM D1883
  • Coarse Aggregate PaDot Quality Requirements (PaDot 408 Sec 703.2 Table B)
  • Natural Building Stone Tests
  • Flexural Strength Testing of Concrete Test Beams
  • Unit Weight – Hardened Concrete Test Cylinder
  • Density, Absorption and Voids in Hardened Concrete (ASTM C642)


The Bethlehem office won a Soil Testing award in the Best of Bethlehem awards 2019!


CTL Bethlehem Soil Testing award 2019
Proud Member The Chamber Greater LeHigh Valley Chamber of Commerce