_REVISION - M1977208 (3) - Laserfiche WebLink

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DG°3Q~~ groundwater basins as determined by the Water Quality Control Commission). Mr. Posey suggested we use the more restrictive standard. 3.0 Generation and Disposal of Cement Kiln Dust The Lyons cement plant generates approximately 20,000 - 30,000 tons of CKD annually. The cement kiln dust is removed from the kiln on a continuous basis when the kiln is operating. From there it is put into a pug mill and mixed with water prior to truck transport to the disposal area in the quarry. The addition of water keeps dusting to a minimum for the approximately 2000-foot haul distance into the quarry pit. The CKD is hauled in open dump trucks. CKD is end dumped in C-pit. Permit number M-77-208 allows dust disposal in C- pit. The disposed dust is frequently sprayed with water from a battery of large sprinklers surrounding the disposal area. The sprinklers place enough water on the dust to minimize wind erosion, but not enough to saturate the mass. There is some surface runoff of sprinkler water into the bottom of C-pit but the volume is relatively minor. 4.0 Chemical Characteristics of the Cement Kiln Dust 4.1 Sample Locations and Sampling Procedures The chemical characteristics of the CKD were evaluated by sampling and laboratory analysis of the CKD presently disposed in C-Pit. Sampling and laboratory analysis was also performed on cement raw materials (limestone and 3rd Ridge Shale), kiln feed, a background soil sample from a local pasture upgradient of the plant, and roadbed material along North 59th Street downgradient of the plant. These samples were obtained and analyzed to provide a baseline to evaluate the results of the CKD analyses. Samples of water from A-Pit and a local water well completed in the Dakota Sandstone were also collected for comparison. Sampling of the CKD and other solid and aqueous materials was performed by personnel from Banks and Gesso LLC and Grant Environmental, Inc. (Grant) on Wednesday, April 7, 1999. The CKD and other solid materials were collected using a decontaminated shove{, 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. 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