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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 21 /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 throucLh 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