Hummel & Co. offers a full range of soil physical testing. All tests include an interpretation at no additional cost to you. Below is a guide for selecting the testing services to suit your needs. See our current price list for pricing information, normal turnaround time, and quantities required.
Particle Size Analysis (ASTM F1632, D422)
This test will determine the percentage of sand, silt, and clay in a soil, as well as the sand size distribution and textural class. We offer this test to see what you have or are starting with for soil type, and for comparing soils to specifications. We will make recommendations for soil improvement if we know the application or have specifications.
Organic Matter Content of Soils, and Mixes (ASTM F1647, method A)
Determination of organic matter by weight of soils.
Proctor Testing (ASTM D698, D1557)
Proctor testing is used to evaluate the compaction characteristics of the soil. This test determines the maximum density the soil can be compacted to, and at what moisture content the soil is most prone to compaction. Proctor testing is useful in determining how compacted a soil is in the field, and is useful in evaluating the effects of soil amendments on soil density and porosity. We offer two levels of proctor testing: the standard proctor test (ASTM D698) and a modified proctor test (ASTM D1557), the latter being a more severe compaction test.
Complete Physical Analysis of Soil or Amended Soils:
This group of tests includes a standard proctor test on a soil as received, or a soil that has been amended. A complete physical analysis is then performed on the soil or amended soil at 80 and 85% (or specified level) maximum compaction. The test includes the proctor test, particle size analysis, organic matter content, infiltration rate, total porosity, and aeration and capillary porosity. This is the best way to evaluate soils or amended soils for sports turf and landscape uses.
Permeability/Infiltration Rate (ASTM F1815, F1815 modified, D5856)
We have the ability to run permeability using a number of different methods and at various compaction levels.
Complete Physical Analysis with Standard Water Release Curve (ASTM F1815, modified for water release)
This test goes a step beyond the standard Complete Physical Analysis. We not only determine the water holding capacity of a soil, but we also determine how much water is available to the plant in a simulated dry down cycle.
Gravel Particle Size Analysis (ASTM C136)
A particle size distribution of the under drainage gravel is needed to make sure that the gravel will drain, and to make sure that it is sized properly to prevent root zone mix migration into the gravel. The D15 and coefficient of uniformity are reported.
We frequently perform this test to evaluate stone for synthetic turf field installations. For the finish stone we also recommend an infiltration rate.
The LA Abrasion (ASTM C-131) test is recommended where the stability of the gravel is in question.
The Sulfate Soundness (ASTM C-88) test is sometimes required in specifications and evaluates the potential for gravel and sand degradation from freeze - thaw cycles.
Organic Matter Quality (ASTM D4531, D2976, D2980, D2974, Hummel & Co SOP)
The organic matter in your amended soil plays an important role in the performance of the mix. It is recommended that any organic matter source of unknown origin or quality have this test performed. Included are percent organic matter, percent ash, pH, water holding capacity, density, and organic matter yield. For more comprehensive testing of compost, including maturity and stability, we recommend sending it to a qualified lab certified by the U.S. Compost Council.
Sand Size Analysis (Hummel & Co. SOP, ASTM C136)
Routinely run as a part of our quality control testing, this is a quick, inexpensive test to determine if a sand or mix is suitable for considering as a soil amendment.
Topsoil Quality Test (ASTM F1632, F1647 method A)
The topsoil quality test includes particle size, organic matter content, and nutrient analysis. Interpretations will include comments on the quality of the soil and recommendations for improvement.
Ball Diamond Mix Analysis (ASTM F1632 or D422)
Includes a particle size analysis and Munsell color analysis of infield soils, pitcher's mound clays, and warning track materials. The hydrometer method (D422) splits out coarse and fine silts. Includes interpretation and recommendations.
We are available for consulting in many different capacities, including construction specification writing and review (working with designers), forensics work, soil fertility programming, and others. Site visits are available. Contact us for fee proposals and availability.
Hummel & Co. offers several individual tests. See our price list for the complete list of services.