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<br />1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />ccss, ~~. <br />chemical contaminants have been extracted from the ash. This normally requires three or more <br />extractions. Only two extractions were performed due to budgetary constraints. <br />The SELP test was repeated for synthetic groundwater with varying pH values to represent a range <br />of possible site conditions. Synthetic groundwater(s) with pH values of 5, 7 and 8.5 were used. The <br />first extraction from the SELP test for each pH value was analyzed for the full suite of chemical <br />compounds. These include: <br />• Sulfate • Chloride • Fluoride Cyanide <br />• Mercury • Nitrate • Nitrite <br />• 20 other metals (Aluminum, Antimony, Arsenic, Barium, Beryllium, Boron, <br />Cadmium, Chromium, Cobalt, Copper, Iron, Lead, Lithium, Manganese, Nickel, <br />Selenium, Silver, Thallium, Vanadium and Zinc). Conductivity and pH will of <br />the leachate was measured at CSU prior to sending the sample to the laboratory <br />for chemical analyses. <br />The SELP test was conducted at CSU. The extracted water samples from the test were sent to <br />Analytica Environmental Labs for chemical analyses. Analytical results from the first extraction <br />were used to identify those compounds to be analyzed for in subsequent extractions of the SELP <br />test and in the SGCLP test. Those chemical compounds, which were either non-detect or detected <br />at very low concentrations during the first extraction were not analyzed for in subsequent <br />extractions of the SELP test or in the SGCLP test. <br />2.3.2 "Toxic Characteristics Leaching Procedure" (TCLP} <br />The "Toxic Characteristic Leaching Procedure" (TCLP) test is designed to determine the mobility <br />of toxicity characteristic constituenu and is the EPA method for classifying wastes as hazardous or <br />non hazardous based on toxicity. The full suite of chemical compounds (see list for SELP test) was <br />analyzed during the TCLP test. <br />2.3.3 °Synthetic Grouud Water Leachiug Procedure" (SGLP) <br />The "Synthetic Ground Water Leaching Procedure" (SGLP) test is identical to the TCLP test with <br />the exception that synthetic groundwater is used as the leaching fluid. A description of the TCLP <br />test is provided above. The SGLP test was developed to simulate geochemical conditions more <br />5 <br />