Grading and fill
Observation and density testing during grading and placement of compacted fill.
NGS / COMPACTION & CONSTRUCTION TESTING
Soil compaction & construction testing
Construction testing documents the work as it happens. NGS provides field observation, compaction testing and reporting for earthwork and related construction activities.
Discuss your projectTHE SCOPE
Field verification as the work progresses.
Each assignment begins with the site and the proposed work. We develop a scope that answers the project’s engineering questions.
Subgrade and backfill
Testing for building pads, pavement subgrade, utility trench backfill and aggregate base placement.
Paving and concrete
Testing support for hot mix asphalt, with ACI-certified technicians available for field concrete testing and sampling.
Project documentation
Field records and compaction reporting that bring observations and test results together.
OUR FIELD EQUIPMENT
Compaction,
measured on site.
Our white Troxler 4540 EGauge Combo puts in-place density testing in our own field team’s hands.
For soil work, density readings and moisture measurements are evaluated against the appropriate laboratory compaction curve and project requirements. This helps identify areas that need additional compaction or moisture adjustment while the work is accessible.
- Timely feedback during grading, fill placement and pavement construction.
- Measured results to support compaction records and engineering review.
- A combination gauge suited to soil and asphalt density testing.
The 4540 measures density; soil moisture is measured separately, including with its companion moisture probe. Acceptance is based on the applicable test method, project specifications and engineering evaluation.
Explore our in-house laboratory
Fontana, California · RELATED PROJECT EXPERIENCE
Warehouse Development
Geotechnical investigation · Stormwater percolation testing · Compaction testingNGS investigated the site for a proposed 40,800-square-foot concrete tilt-up warehouse, including parking, utilities and stormwater improvements. Three exploratory borings reached up to 51.5 feet, and four percolation test holes supported stormwater planning. Laboratory testing and engineering evaluation informed foundation and grading recommendations. NGS continued into construction with field observation and compaction testing for the building pad.
Read the case studyGETTING STARTED
Useful to know.
When should testing be coordinated?
Contact NGS before earthwork or material placement begins so the testing scope can be coordinated with the plans, specifications and construction schedule.
What information helps you scope the work?
Share the site location, plans, geotechnical report, applicable specifications and anticipated construction activities. These help identify the observation and testing needs.
PROJECT PLANNING AND EXPERIENCE
Arrange testing before the work begins.
Coordinate excavation observations and testing while the relevant work is accessible.