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WATER SAMPLE ANALYSIS REPORT CEMEX, INC. LYONS PLANT DMG PERMIT M-1977-208 Prepared by: Hang H. Posey Division of Minerals and G August 26, 2004 Introduction, Background, Purpose: The attached water quality analysis derives from a June 24, 2004 sampling at the above captioned operation. DMG sampling followed up on the operator's earlier report of elevated selenium at the monitoring point. The purpose of DMG's 6/24 sampling was to determine whether there are other regulated pazameters in the pond that may need attention. The sampling point is an abandoned limestone quarry pond, referred to as C-Pit. This pond was established by DMG as the groundwater monitoring point. The pond referred to as A-Pit, which lies about''/a mile east of C-Pit, is established as the compliance point. These monitoring stations were established to monitor potential contaminants from cement kiln dust (CKD) that is stored on the property, adjacent to C-Pit. Though surface ponds, these two points aze used to monitor compliance with DMG- established numeric protection levels for groundwater downgradient from the CKD holding facility. C-Pit appazently collects water from three sources: direct precipitation and precipitation run-on, seepage from an upland irrigation ditch, which lies west and south of the pond, and draindown water that is applied to cement kiln dust that is deposited on one bank of the pond. Cement kiln dust (CKD) at this operation is a by-product of the cement manufacturing that takes place at this operation. The CKD comprises dust-sized particles that appeaz from analyses to be mostly lime, with smaller quantities of slaked or partially slaked shale, limestone, gypsum and other minor silica or clay impurities in the feedstocks. The cement kiln at this operation is fueled by natural gas, and therefore is not expected to provide any organic or other impurities to the CKD. DMG and company personnel using lab-supplied sample containers collected the sample with a polypropylene sampler supplied by the company. No special equipment other than fresh lab gloves was used. Caze was taken not to disturb bottom sediments. While at the sampling site, we observed pigeons flying about the azea, sometimes lighting on the quarry walls. We looked for and did not see deer or other animal tracks neaz the sampling site. Overall use by wildlife is not known and should not be implied by this report. DMG requested a rush analysis but results were delayed due to some unexplained lab oversight. DMG requested dissolved rather than total metals analyses, yet the sample was inadvertently labeled "drinking water," so the lab conducted total metals analyses. Those issues aside, the analyses aze adequate for this 2