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<br />. <br /> <br />Explanation of abbreviations and codes used in table 2. <br /> <br />Period of record: The dates given are the calendar years in which records <br />began or ended. <br /> <br />Data frequency: <br />A annual <br />BM bimonthly <br />C continuous (recorder) <br />D da il y <br />HL high and low flow samples only <br />HLM high flow, low flow, mid-summer <br />M every six weeks plus two events <br />Q quarterly <br />SS sample during spraying season (frequency determined in late spring) <br />T twenty-four samples during April 15 to October 15 <br /> <br />Analysis <br />1 <br />2 <br />3 <br />4 <br />5 <br /> <br />5A <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br /> <br />schedule: <br />salinity (major constituents) <br />specific conductance <br />daily temperature (observed or recorder) <br />chemical oxygen demand <br />field determinations of: pH, specific conductance, dissolved oxygen, <br />temperature, and (or) turbidity <br />field determinations of: pH, specific conductance, and temperature <br />fecal coliform, and (or) fecal streptococcus <br />nutrient <br />trace metals <br />pesticides <br />radiochemical <br />field determinations of specific conductance and temperature <br />specific conductance and temperature (continuous monitors) <br />stable isotopes <br />field alkalinity <br /> <br />Field office: <br />C Casper <br />CH Cheyenne <br />CO Colorado District <br />ID Idaho District <br />MT Montana District <br />R Riverton <br /> <br />28 <br />