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' CGRS, Inc. • <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>*6f <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 /> ttest and in the SGCLP test. Those chemical compounds, which were either non-detect or detected I J , <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 constituents 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 Ground Water Leaching 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 />