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Reliable indicator parameters can be identified by conducting a reconnaissance of pre- <br />project groundwater, San Joaquin River water (the historical irrigation water source), <br />municipal supply water, and reclaimed water. The most successful indicators can then <br />be included as part of the monitoring program to identify water samples influenced by <br />reclaimed water. <br />Table 1. Constituent List, Sample Processing and Analytical Methods. <br />Constituent Sampling <br />Meter! <br />EPA <br />Standard <br />Method <br />Analytical, Purpose Name Units Processing Container' Preservative Recommended <br />Detection Limit <br />A pH2 pH <br />units Unfiltered None None <br />YSI Model <br />556 MPS <br />meter <br />0.01 <br />B Temperature2 °C Unfiltered None None <br />YSI Model <br />556 MPS <br />meter <br />0.1 <br />Electrical <br />Conductivity2 riS/cm Unfiltered None None <br />YSI Model <br />556 MPS <br />meter <br />10 <br />eter <br />B Dissolved <br />Oxygen2 mg/L Unfiltered None None <br />YSI YSI Model <br />556 MPS <br />meter <br />0.1 <br />B <br />Oxidation- <br />Reduction <br />Potential2 <br />mV Unfiltered None None <br />YSI Model <br />556 MPS <br />meter <br />0.1 <br />A <br />Total <br />Dissolved <br />Solids <br />mg/L Filtered polyethylene None SM 25400 10 <br />C Standard <br />Cations3 mg/L Filtered polyethylene <br />(a) <br />HNO3 200.7 0.5 <br />C Standard <br />Anions4 mg/L Filtered polyethylene <br />(b) None 300.0 1 <br />O <br />Alkalinity <br />(HCO3, CO3, <br />OH and total) <br />mg/L Unfiltered polyethylene None 2320B 10 <br />A <br />Total <br />Coliform <br />Organisms <br />MPN/ <br />100 ml Unfiltered plastic <br />De- <br />chlorinating <br />agent <br />SM 9221B 2 <br />A Ammonia as <br />N mg/L Filtered polyethylene <br />(C) H2SO4 350.1 0.1 <br />A Nitrate as <br />Nitrogen mg/L Filtered polyethylene <br />(c) H2SO4 353.2 0.1 <br />A <br />Nitrate + <br />Nitrite as <br />Nitrogen <br />mg/L Filtered polyethylene <br />(c) H2504 353.2 0.1 <br />C <br />Total Kjeldahl <br />Nitrogen mg/L Filtered polyethylene <br />(c) H2SO4 351.2 0.1