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Constituent Analysis Plan <br />Table 1 below reports the constituent list, sample processing, and analytical methods. <br />Note that some constituents (i.e., potential wastewater indicators) are not analyzed <br />each sampling event. <br />Field parameters collected during sampling to confirm water produced is <br />representative of groundwater. <br />Constituents of concern identified in the Waste Discharge Requirements under <br />Groundwater Limitations. <br />Constituents of concern identified in the Waste Discharge Requirements under the <br />Groundwater Monitoring and Reporting Program. <br />Constituents reportedly detected in monitoring well water samples at levels that <br />exceed State and/or Federal EPA MCL's. <br />Constituents commonly found in wastewater. <br />Most constituents listed in Table 1 occur naturally in the environment. Because well <br />water may represent a mixture of pre-project groundwater and reclaimed water, it can <br />be advantageous to distinguish between natural changes in constituent concentrations <br />from those directly attributed to land disposal of treated wastewater. A partial list of <br />possible indicator parameters includes: <br />Chloride, bromide, fluoride 3,4 . <br />Caffeine 5. <br />Ethylenediaminetetraacetic acid (EDTA)5. <br />Stable isotopes of oxygen and hydrogen7 . <br />Boron isotopes 8. <br />3 Stanley N. Davis, Donald 0. Whittemore, and June Fabryka-Martin, "Uses of Chloride/Bromide Ratios in <br />Studies of Potable Water", Journal of Ground Water, 1998, pp. 338-350. <br />4 Avner Vengosh and lrena Pankratov, "Chloride/Bromide and Chloride/Fluoride Ratios of Domestic <br />Sewage Effluents and Associated Contaminated Ground Water", Journal of Ground Water, 1998, pp. <br />815-824. <br />5 Ralph L. Seiler, Steven D. Zaugg, James M. Thomas, and Darcy L. Howcroft, "Caffeine and <br />Pharmaceuticals as Indicators of Waste Water Contamination in Wells", Journal of Ground Water, 1999, <br />pp. 405-410. <br />6 Barber, Larry, II. And others, "Organic Constituents that Persist During Aquifer Storage and Recovery of <br />Reclaimed Water in Los Angeles County, California", in Conjuctive Use of Water Resources, Aquifer <br />Storage and Recovery, AWRA Symposium Proceedings, 1997. <br />R. Aravena, M.L. Evans, and J.A. Cherry, "Stable Isotopes of Oxygen and Nitrogen in Source <br />Identification of Nitrate from Septic Systems", Journal of Ground Water, 1993, pp. 180-86. <br />8 A. Vengosh, K.G. Heunnann, S. Juraske, and R. Kasher, "Boron Isotope Application for Tracing Sources <br />of Contamination in Groundwater", Environmental Science and Technology, 1994, pp. 1968-74. <br />3