© 2021 DK Enterprises Guidelines and Test Methods Page 2 | 6 Table 2: Metric Unit and Test Methods Symbol, Name and Description and/or Quantity Symbol Name Description and/or Quantity GRO Gasoline Range Organics kg Kilogram Unit of weight in metric system, (SI Units) kg is 1,000 grams (g). Mesh Preceded by a number, designates a screen size for determining particle size. MCL Maximum Content Level The highest level of a contaminant that is allowed in drinking water regulated by the state of California. If no MCL is listed, the MCL has not been established. Mg Milligram Unit of weight in metric system; (SI Units) mg is 1/1000 gram (g). mg/kg Mass per unit Weight Concentration mg per kg states how many mg of a chemical present in 1 kg of a material. (SI Units) State (Title 22 TTLC & STLC) Hazardous Waste Criteria. Mg/L Mass per unit Volume Concentration Milligrams per 1 Liter; equivalent to parts per million (ppm). (SI Units) Federal (RCRA-TCLP) hazardous Waste Criteria. M Meter Base unit of length in the metric system (SI Units). Mm Millimeters Unit of length in the metric system (SI Units) mm is 1/1000 meter (m). ND Non-Detectable Analyte NOT DETECTED at or above the reporting limit. PAH Polycyclic aromatic hydrocarbon A family of organic aromatic chemicals (Benzene family) that are carcinogenic. PFAS Polyfluoroalkyl substances A group of man-made chemicals found in environment and in the human body. PFOA Perfluorooctanoic Stable chemicals that are comprised of chains of
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