| The OIL-IN-SOIL™ field screening test kits are useful tools for reducing the cost of spills and Phase I and Phase II site assessments. Our test kits help you rapidly delineate the perimeter, depth and direction of spills in soil. They are also often used with core samples to identify organic substances. Our OIL-IN-SOIL™ tests use color to indicate the presence or absence of NAPL or DNAPL. OIL-IN-SOIL™ is available with, SUDAN IV dye or a non mutagenic bright red azo dye or a royal blue anthraquinone dye, useful for red color soils.