Laserfiche WebLink
900003OAll CON-25 <br /> 4.0 <br /> ANALYTICAL PARAMETERS <br /> 4.1 FERTILIZER PARAMETERS <br /> Based on the information available for this work plan, samples which <br /> may have been impacted by fertilizers will be analyzed for nitrogen <br /> constituents (total Kjeldahl nitrogen, nitrate, and ammonium) , metals <br /> (boron, arsenic, cadmium, copper, lead, nickel , and zinc) , soil nutrients <br /> (phosphorous and potassium) , and pH. The rationale for selection of <br /> fertilizer constituents for chemical testing is based on (1) the past use <br /> of nitrogen-based fertilizers and metals at the site, (2) the possible <br /> presence of trace metals as impurities or additives in the fertilizer, and <br /> (3) the evaluation of the soil nutrients in the event that the soil would <br /> be excavated and used for agricultural application. <br /> The investigation of potential environmental impacts at the Vernalis <br /> facility is designed to evaluate the hazard posed by these constituents in <br /> the soil and as a threat to groundwater through leaching. Thus, where <br /> appropriate, the chemical analyses of both total and leachable concentra- <br /> tions of these parameters in the soil samples will be performed. The <br /> analytical methods and parameters are listed in Table 4-1. <br /> Nitrogen has been used onsite in a number of bulk liquid fertilizers. <br /> To characterize the various forms of nitrogen in soil and evaluate the <br /> potential impact of nitrate on the groundwater, it is proposed that <br /> analyses for total Kjeldahl nitrogen (TKN) , total soluble ammonium, and <br /> total soluble nitrate be performed on soil samples. The analysis for total <br /> Kjeldahl nitrogen measures total nitrogen content in the soil sample. The <br /> 4-1 <br />