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[~ U~ ~ ~ ~ <br />transmitted with the samples from Grant to Barringer. The analyses pertormed <br />included: <br />A whole-rock analysis of the CKD (BG-1) to determine the total elemental <br />composition of the dust. The CKD was analyzed for the constituents listed <br />in Table 4.1. This table also includes the analytical method and detection <br />limit. <br />Leachate analysis of the CKD and other solid materials was performed <br />using the U. S. Environmental Protection Agency (EPA) Synthetic <br />Precipitation Leaching Procedure (SPLP), SW-846 Method 1312 to <br />determine the concentration of constituents in the leachate. The resulting <br />leachates were analyzed for the constituents listed in Table 4.2. This table <br />also includes the analytical method and detection limit. <br />The SPLP is a rotary agitation method where constituents in the sample <br />material are leached with an amount of extraction fluid equal to 20 times the <br />weight of the sample material. About 100 grams of sample material is used in <br />each leaching test. Extraction fluid #2 was used for the extractions. Extraction <br />fluid #2 consists of a 60/40 weight percent mixture of sulfuric and nitric acids <br />added to deionized water until the pH is adjusted to 5.1±0.05. The sample <br />material and extraction fluid are placed in a glass extraction vessel that is <br />rotated at 30 t 2 revolutions per minute for 18 t 2 hours at a temperature of <br />23 t 2 degrees Centigrade. After agitation, the extract liquid is decanted, <br />filtered, and analyzed. The SPLP leaching solution is representative of the <br />composition of precipitation for the western U. S. The leachates were <br />simulated in the laboratory as they might form under natural conditions by <br />leaching the solid sample with a synthetic precipitation solution. <br />Analysis of the groundwater samples for the constituents listed in Table <br />4.2. This table also includes the analytical method and detection limit. <br />4.2.2 Laboratory Quality Assurance/Quality Control <br />With the exception of analyses for which no EPA analytical protocol was <br />available, all analyses were conducted using EPA-approved methods specified in <br />SW-846. Routine laboratory QAiQC procedures were used for the analyses. The <br />QC measures included duplicate samples, matrix spike samples, and certified <br />standards. Duplicate samples were analyzed to determine the reproducibility of <br />the results. Matrix spike samples were analyzed to determine sample matrix <br />characteristics. Spike analyses consist of adding a known amount of each <br />analyte to a sample and determining the percent recovery. The concentration of <br />each analyte relative to the known added concentration provides an estimate of <br />the reliability of the analysis and the properties of the sample matrix. Laboratory <br />certified standards were also used to verify the accuracy of the analytical results. <br />