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KEY TO ABBREVIATIONS and METHOD REFERENCES < : Less than; When appearing in results colurm 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. To obtain the actual reporting limits for this sariple, multiply the stated Reporting Limits by the dilution factor (but do not multiply reported values). ICVS : Initial Calibration Verification Standard (External Standard). mean Average; sum of measurements divided by number of measurements. m3/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. hr Milliliters r liter r hour. mtl U per per r MPN/100 mL Most probable number of bacteria per one hundred milliliters of sample. NIA Not applicable. NA Not analyzed. ND Not detected; the analyte concentration is less than applicable listed reporting limit. NTU : Nephelamtric 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 mm crograms of analyte per liter of sample. umtros/cm : Micramos 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 throe h 625: see "Guidelines Establishing Test Procedures for the Analysis of Pollutants" U.S. EPA, 40 CFR, Part 136, rev. 1988. 1 Methods 1000 throw h 9999: see Test Methods for Evaluating Solid Waste", U S. EPA SW-846, 3rd edition, 1986• SM: see "Standard Metlb s for the Examination of Water & Wastewater, 16th Edition, APPA, 1985.