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® KEY TO ABBREVIATIONS and METHOD REFERENCES < Less than; when appearing in results column indicates analyte not detected at the value following. This datum supercedes the listed Reporting Limit * Reporting Limits are a function of the dilution factor for any given sample. Actual reporting limits and results have been multiplied by the listed dilution factor Do not multiply the reporting limits or reported values by the dilution factor. dw Result expressed as dry weight. mean Average; sum of measurements divided by number of measurements. mg/Kg (ppm) Concentration in units of milligrams of analyte per kilogram of sample, wet-weight basis (parts per million) . mg/L Concentration in units of milligrams of analyte per liter of sample. mL/L/hr Milliliters per Liter per hour MPN/100 mL Most probable number of bacteria per one hundred milliliters of sample. N/A Not applicable NA Not analyzed. . ND Not detected; the analyte concentration is less than the applicable listed reporting limit NTU Nephelometric turbidity units RPD Relative percent difference, 100 [value 1 - value 2 ] /mean value. SNA Standard not available ug/Kg (ppb) Concentration in units of micrograms of analyte per kilogram of sample, wet-weight basis (parts per billion) ug/L Concentration in units of micrograms of analyte per liter of sample umhos/cm Micromhos per centimeter Method References Methods 100 through 493 see "Methods for Chemical Analysis of water & Wastes" , U.S. EPA, 600/4-79-020, Rev. 1983 Methods 601 through 625 see "Guidelines Establishing Test Procedures for the Analysis of Pollutants" U S EPA, 40 CFR, Part 136, Rev. 1988. Methods 1000 through 9999 see "Test Methods for Evaluating Solid Waste" , U.S EPA SW-846, 3rd edition, 1986 , Rev. 1, December 1987. SM- see "Standard Methods for the Examination of Water & Wastewater, 17th Edition, APHA, 1989. Revised September, 1993 abb.93