© 2021 DK Enterprises Guidelines and Test Methods Page 4 | 6 Symbol Name Description and/or Quantity 1/1,000,000 meter (m) µm Micron (short for micrometer) Unit of length in the metric system (SI Units) μm is 1/1,000,000 meter (m) WET Test method Toxic Hazardous Waste Extracted Test using citric acid 6PPD- quinone Chemical name A toxic chemical in storm water runoff CA-Luftms Cal guideline California leaking underground fuel tanks LDIR Microplastics Test method Instrumentation method to measure microplastics in water Source: Prepared by DK Enterprises 2021
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