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F ` r <br /> Physicochemical (Nutrient) Analyses -W <br /> Effective and efficient bioremediation methodologies rely not only upon the presence of a <br /> carbon substrate (i.e., petroleum hydrocarbon), but also upon the physicochemical (nutrient) <br /> conditions supporting the biodegradative process. In addition to oxygen (for aerobic/oxida- <br /> tive metabolism) and an appropriate pH range, adequate concentrations of bionutrients must <br /> be available to the microbial population for metabolic processes to occur. Although micro- <br /> ` organisms require trace inorganic nutrients, the primary nutrients essential to their growth are <br /> nitrogen, phosphorous, and potassium. A more detailed account of the significance of <br /> nutrient tracking and how it correlates to biodegradative processes can be found in our <br /> companion publication The Significance and Benefits of Microbiological and Physicochemi- <br /> cal Tracking in the Bioremedial Process. <br /> Knowledge of microbial nutrient requirements is clearly essential to ensure bioremedial <br /> performance and efficiency. It is important to remember that without adequate levels of <br /> nutrients, little, if any, biodegradative activity can be expected to occur. An additional consid- <br /> eration is to understand the consequences of too little or too much nutrient, for example, the <br /> health and safety concerns of nitrate overloading (biotoxicity). BioLogic's goal is to educate <br /> the client by providing clear, concise interpretations of physicochemical data generated by <br /> our laboratory. The better informed the client is, the better the treatment choices that are <br /> made. <br /> BioLogic's laboratory has the capability to conduct basic, routine physicochemical analyses <br /> on a variety of environmental parameters, some of which are listed below. These evaluations <br /> are performed during site characterization and bioprocess monitoring activities. The results of <br /> t nutrient evaluations are reported in parts-per-million (ppm), and in the case of nitrogen <br /> compounds, concentrations of both molecular and ionic forms are provided. For a more com- <br /> plete representation of all of the physicochemical parameters analyses conducted by BioLogic <br /> - please refer to our price list. <br /> 0 pH 0 Ammonia nitrogen <br /> 0 Phosphates 13 Potassium <br /> 0 Nitrate nitrogen 0 Moisture (soil) <br /> 0 Nitrite nitrogen 0 Iron H(in situ only) <br /> 4 <br />