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900003OAll CON-26 <br /> analysis for total soluble nitrate and ammonium measures the amount of <br /> nitrogen likely to leach from the soil . <br /> According to the California Department of Food and Agriculture, trace <br /> metals which may be present in fertilizers, either as nutrient additives or <br /> as impurities, include boron, arsenic, cadmium, copper, lead, nickel , and <br /> zinc. Total concentrations for these metals will be analyzed. If the <br /> total concentrations are less than the Total Threshold Limit Concentration <br /> (TTLC) but greater than the Soluble Threshold Limit Concentration, the <br /> Waste Extraction Test (WET) will be performed to measure soluble concentra- <br /> tions. No WET will be performed for boron since a regulatory standard has <br /> not been established for this constituent. <br /> Analyses for the soil nutrients phosphorous and potassium will also be <br /> performed. These results will serve as guidance for application types and <br /> rates if soil excavation and agricultural application is recommended. <br /> Analyses for the total nutrient concentration and not the soluble fraction <br /> will be performed. <br /> 4.2 PESTICIDE PARAMETERS <br /> Soils which may have been impacted by pesticides will be analyzed for <br /> organochlorine pesticides, organophosphorous pesticides, purgeable halo- <br /> carbons (including D-D and Telone II) , carbamate pesticides, and dithio- <br /> carbamate pesticides (including Vapam) . In addition, analyses for waste <br /> oil constituents (discussed in the next section) will be performed for <br /> samples potentially affected by the pesticide Supreme Oil . The rationale <br /> for selection of pesticide constituents for chemical testing is based on <br /> the available information about current and historical use of pesticides at <br /> the facility by WFS. All analyses will be performed for total concentra- <br /> tions. Analytical methods and parameters are listed in Table 4-1. <br /> 4-3 <br />