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APPENDIX TABLES A I. Concentration of pesticides and polychlorinated biphenyls in seven bottom-sediment core samples from Dillon Reservoir, 1997 ................................................................................................................................... 25 A2. Concentration of polycyclic aromatic hydrocarbons in seven bottom-sediment core samples from Dillon Reservoir, 1997 ............................................................................................................................................ 27 A3. Concentrations of selected major and trace elements in seven bottom-sediment core samples from Dillon Reservoir, 1997 ............................................................................................................................................ 32 CONVERSION FACTORS, VERTICAL DATUM, and ABBREVIATIONS Multiply To obtain By gram centimeter millimeter acre mile square mile square mile acre-foot cubic foot per second (ft3/s) gallon per minute (gal/min) 0.002205 0.3937 0.03937 4.047 1.609 259 2.590 1.233 0.02832 0.003785 pound inch inch square meter kilometer hectare square kilometer cubic meter cubic meter per second cubic meter per minute Temperature in degrees Celsius (0 C) may be converted to degrees Fahrenheit (0 F) as follows: OF = 1.8 (OC + 32) Sea level: In this report. "sea level" refers to the National Geodetic Vertical Datum of I 929-a geodetic datum derived from a general adjustment of the first-order level nets of the United States and Canada. formerly called Sea Level Datum of 1929. Elevation, as used in this report, refers to distance above or below sea level. Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (Ilg/L). Concentrations of chemical constituents in bed sediment are given either in milligrams per kilogram (mg/kg), also referred to as parts per million (ppm): micrograms per kilogram (Ilg/kg); or as a percentage based on weight. Water year is a 12-month period beginning October I of one year and ending September 30 of the following year. A water year is identi- tied by the year in which it ends. VI CONTENTS