Table 9. Blind Sample Program parameters and National Water Quality Laboratory analytical method codes selected for publication on the CD-ROM for water years 1985-95 [A water year begins on October 1 and ends on September 30. Laboratory analytical methods are specific for each unique combination of parameter and method code. See definition files provided in the CD-ROM data sets in Alexander and others (1996) for a complete explanation of these codes] _____________________________________________________________________________ Constituent Codes Water year Parameter Method Beginning Ending _____________________________________________________________________________ N, ammonia, dissolved 00608 B 1985 1995 N, ammonia plus organic, dissolved 00623 A 1985 1991 00623 C 1992 1995 N, nitrate plus nitrite, dissolved 00631 B 1985 1995 Phosphorus, dissolved 00666 B 1985 1991 00666 C 1992 1995 Phosphorus, orthophosphate, dissolved 00671 B 1985 1995 Calcium, dissolved 00915 D 1985 1995 Chloride, dissolved 00940 H 1985 1986 00940 E 1987 1989 00940 J 1990 1992 00940 E 1993 1995 Dissolved solids 70300 A 1985 1995 Magnesium, dissolved 00925 C 1985 1995 Potassium, dissolved 00935 B 1985 1995 Silica, dissolved 00955 D 1985 1995 Sodium, dissolved 00930 C 1985 1995 Sulfate, dissolved 00945 D 1985 1989 00945 G 1990 1995 Fluoride, dissolved 00950 B 1985 1989 00950 E 1990 1995 Aluminum, dissolved 01106 C 1985 1986 01106 E 1987 1995 Arsenic, dissolved 01000 B 1985 1995 Barium, dissolved 01005 C 1985 1995 Beryllium, dissolved 01010 B 1985 1995 Boron, dissolved 01020 B 1985 1995 Cadmium, dissolved 01025 D 1985 1991 01025 F 1992 1995 Chromium, dissolved 01030 B 1985 1987 01030 F 1988 1995 Cobalt, dissolved 01035 C 1985 1995 Copper, dissolved 01040 B 1985 1989 01040 F 1990 1995 Iron, dissolved 01046 D 1985 1995 Lead, dissolved 01049 B 1985 1989 01049 F 1990 1995 Lithium, dissolved 01130 B 1985 1995 Manganese, dissolved 01056 C 1985 1995 Mercury, dissolved 71890 B 1985 1995 Molybdenum, dissolved 01060 A 1985 1995 Nickel, dissolved 01065 B 1985 1989 01065 F 1990 1995 Selenium, dissolved 01145 A 1985 1995 Silver, dissolved 01075 A 1985 1989 01075 F 1990 1995 Strontium, dissolved 01080 B 1985 1995 Zinc, dissolved 01090 B 1985 1995 _____________________________________________________________________________