REP33845 - Laserfiche WebLink

Home Browse Search

Wednesday, April 7, 1999. The CKD and other solid materials were collected using a decontaminated shovel, placed into pre-cleaned five-gallon plastic buckets, and capped with plastic lids. The plastic buckets were labeled with the sample number, sample name, and date of collection. L11 w ~~ In order to collect representative samples, a composite sample was prepared of each solid material by collecting the sample from several different locations at each sample site. The sampling shovel was decontaminated between samples to prevent cross-contamination of subsequent samples. The shovel was decontaminated by brushing with a steel brush to remove adhered solids, and washing the shovel with a brush and a solution of Alconox (a non-phosphate laboratory grade detergent). The shovel was then rinsed with deionized water and air dried prior to collecting the next sample. was C- Pit. The limestone (BG-2) and 3rd Ridge Shale (BG-3) samples were collected from the raw material stockpiles located south of the plant near C-Pit. The kiln feed sample (BG-4) was obtained from inside the cement plant. An upgradient background soil sample (BG-5) was collected from loukenon's pasture located west of U. S. Highway 36. A sample of the roadbed material (BG-6) along North 59th Street was also collected. This sample location is situated about 8,500 feet downgradient (southeast) of C-Pit. Figure 1 shows the solid sample locations. Water samples were also collected from A-Pit and the deep Dakota well (BG- 1 D}. Figure 1 shows the water sample locations. These samples were collected and placed into pre-cleaned bottles provided by the analytical laboratory. Each bottle was labeled with the sample number, date and time, and sampler name at the sampling site. The samples were placed into an ice cooler with blue ice and maintained at approximately 4 degrees Centigrade (°C) until delivery to the analytical laboratory. Both the solid and water samples were maintained under chain-of-custody until delivered to the analytical laboratory. The chain-of-custody procedures were followed to establish a written record of sample handling between the sample site and the laboratory. The deep Dakota Well sample was collected from a well located about 6,000 feet southeast of C-Pit. The well is completed at a depth of about 1,130 feet in the Dakota sandstone. The wel! is artesian and is free flowing at the well head. The sample of the well water was collected from a plastic hose connected to the well head. Measurements of pH, temperature, and redox potential were pertormed at the wellhead until consistent, stable values were obtained. After the field measurements had stabilized the water sample was collected. An A-Pit water sample was collected along the western shore of the reservoir. Measurements of pH, temperature, and redox potential were also made at this sample location. A- Pit samples were collected by gentley submersing the sample bottles in the pit and capping the bottles while submersed.