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S E C O R <br /> 7-Eleven Store#14117 <br /> Field Test for Evaluation of Oxidation Capacity of Groundwater <br /> July 22, 2004 <br /> Page 5 <br /> The groundwater samples will be analyzed for the following constituents and parameters <br /> Biochemical oxygen demand (BOD) Hardness <br /> Chemical oxygen demand (COD) pH <br /> Fluoride Ion Balance <br /> Nitrogen—ammonia Chromium (hexavalent) <br /> Nitrogen -- nitrate CAM 17 Metals <br /> Nitrogen—total Kjeldahl Silver <br /> Phosphorus Arsenic <br /> Sulfide Barium <br /> Sulfate Beryllium <br /> Alkalinity Cadmium <br /> Calcium Cobalt <br /> Magnesium Chromium (total) <br /> Potassium Mercury <br /> Sodium Molybdenum <br /> Copper Nickel <br /> Iron (total) Lead <br /> Manganese Antimony <br /> Zinc Selenium <br /> Chloride Thallium <br /> Conductivity Vanadium <br /> Total Dissolved Solids Zinc <br /> The analytical methods are listed in Attachment B with specific sample container and <br /> preservative requirements for each analyte <br /> Oxygen injection will be completed using bottled oxygen transported to the site by SECOR <br /> The amount of oxygen injected into the well will be 150 W per injection event Ferrous iron <br /> and dissolved oxygen concentrations will be measured in the field in the injection well and <br /> the observation well prior to and immediately following the initial oxygen Injection Three <br /> casing volumes of water will then be purged from the two wells as outlined previously in this <br /> workplan Groundwater samples will then be collected from the injection well and <br /> observation well and analyzed for the same suite of inorganic constituents listed above <br /> These data will provide an understanding of potential immediate effects to groundwater <br /> chemistry from injection of oxygen <br /> SECOR personnel will visit the site twice a month to conduct oxygen injection <br /> Groundwater samples will be collected once a month prior to each injection event and <br /> analyzed for the inorganic constituents listed above Dissolved oxygen concentrations and <br /> ferrous iron concentrations will be measured in the injection well and the observation well <br /> before and after each injection <br /> 14117 Field Test Oxidation Capacity doc SECOR International incorporated <br />