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' Once the column is saturated, the testing will begin. The intent of the test is to allow for one pore <br /> ' volume exchange every four days. ASTM D4874-95 recommends a 24-hour flow through time, but <br /> the pore volume flow rate will increased to 96 hours to reflect the time water will be in contact with <br /> the ash during the pilot test. No channeling of any type, other that natural flow variations through <br /> ' the fly ash and native material, will be permitted. A fluorescein tracer dye will be added to the <br /> constant head source to observe any channeling through the column. Column testing will be run at <br /> ambient temperature; if possible the temperature of the reagent water will maintained to represent <br /> anticipated groundwater temperature (-60 °F) at the Varna facility. Pore volumes 1, 2, 4 and 8 will <br /> ' be collected and analyzed. The effluent will be filtered with 0.45 pm and 0.10 pm filter paper in <br /> order to determine the true dissolved elemental species concentrations. All samples will be <br /> analyzed after the 0.45 µm filtration. However, only a select number of samples will be analyzed <br /> after the with 0.10 pm filtration. The effluent samples will be collected in appropriate sample <br /> containers and will be transported to the laboratory under strict chain-of-custody procedures and <br /> holding times. Field parameters such as pH, conductivity and temperature will be measured in the <br /> ' effluent for each pore volume selected for laboratory analyses. Alkalinity as bicarbonate and <br /> carbonate, chloride, fluoride, phosphorus, nitrate, nitrite, and sulfate along with other metals <br /> (aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, chromium, cobalt, copper, iron, <br /> ' lead, lithium, manganese, mercury, molybdenum, nickel, selenium, silver, thallium, titanium, <br /> uranium, vanadium and zinc) will be submitted for laboratory analyses. <br /> 2.3 Sample Handling and Custody Procedures <br /> ' 2.3.1 Sample Identification <br /> A sample identification scheme will be used that maintains consistency for the names of leachate <br /> ' samples, as well labels affixed to each sample container, and entered on to the Chain-of-Custody <br /> (COC) forms. The following scheme will be followed: <br /> ' 1. Samples from the leaching experiment will be identified by the pore volume it was <br /> obtained from. For example leachate obtained from the first pore volume would be <br /> identified as RLP—PV-1. <br /> ' 2. Water samples obtained from the gravel quarry will be identified as Pond. <br /> 2.3.2 Sample Method Requirements <br /> Analytical procedures for water and soil samples will conform to the USEPA guidelines described <br /> in SW 846 (Test Methods for Evaluating Solid Waste/Physical/Chemical Methods, 3rd ed.). Table <br /> ' 1, presents the analyses that are anticipated on the project. <br /> 2.3.3 Sample Custody <br /> ' Strict chain-of-custody (COC) protocol will be maintained throughout the life of the field program <br /> and will be controlled through the use of a COC Record supplied by the laboratory. The following <br /> procedures will be used to document,establish, and maintain custody of field samples: <br /> ' • Sample labels will be completed for each sample using waterproof ink; making sure that <br /> the labels are legible and affixed firmly on the sample container; <br /> ' • All Sample-related information will be recorded in the project log book; <br /> • The field sampling technician will retain custody of the samples until they are transferred <br /> ' or properly dispatched to a laboratory; and, <br /> ' vwa Companies <br /> Quality Assurance Project Plan <br /> Page 8 <br /> 1 <br />