This test method is a widely used procedure for the quantitative analysis of metals in sludge, soils, sediments, and other solid matrices using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The method is designed to accurately measure metals present in complex environmental samples, including wastewater treatment sludge. This test method quantifies aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, chromium, cobalt, copper, iron, lead, manganese, molybdenum, nickel, selenium, silica (as SiO2), silver, strontium, thallium, vanadium, and zinc.