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1 • DA Constituent Analysis Plan ' Table D2 below reports the constituent list, sample processing, and analytical methods. The list was developed based on requirements specified in the WDRs (the Groundwater Limitations and Monitoring and Reporting Program), field ' sampling requirements to ensure water samples are representative of formation water, and potential wastewater indicators. • As required by the Monitoring and Reporting Program, sampling includes groundwater levels (depth and elevation), gradients, and the following constituent analyses: Total Dissolved Solids, Nitrate as Nitrogen, Total ' Kjeldahl Nitrogen, pH, Trihalomethanes, Boron, Chloride, Iron, Manganese, Sodium, and Standard Minerals (Calcium, Magnesium, Potassium, Sulfate, Total Alkalinity, and Hardness). The WDRs specify these constituents as the minimum required by the Monitoring and Reporting Program, and are identified as purpose "A" and have shaded rows in Table D2. • The WDRs cite the following constituents in its Groundwater Limitations: Total Coliform Organisms, Total Nitrogen, Nitrite, Ammonia, Bromoform, Bromod ichloromethane, Chloroform, and Dibromochloromethane. Although ' not specified in the Monitoring and Reporting Program, the WDRs specify that waste constituents from any portion of the WRP shall not cause groundwater to contain any of the constituents cited in the Groundwater Limitations in concentrations greater than listed or greater than natural background quality, whichever is greater. The Groundwater Limitation constituents are identified as having purpose "B" in Table D2. ' • Field parameters collected during sampling to confirm the water sample produced is representative of formation water: Temperature, Electrical Conductivity, Dissolved Oxygen, and Oxidation-Reduction Potential. These constituents are identified as having purpose "C" in Table D2. • Constituents reportedly detected in background monitoring well water samples at levels that exceed State and/or Federal EPA MCL's: Arsenic, Chromium, Barium, Thallium, Aluminum, Lead, Nickel, and Zinc. These ' constituents are identified as having purpose "D" in Table D2. • Most constituents listed in Table D2 occur naturally in the environment. ' Because well water may represent a mixture of pre-project (background) groundwater and reclaimed water, it can be advantageous to distinguish between natural changes in constituent concentrations from those directly ' attributed to land application of treated wastewater. A partial list of possible wastewater indicator parameters includes ortho-Phosphate, Bromide, and Fluoride. These constituents are identified as having purpose "E" in Table D2. D7