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<br /> 3) Based on leaching tests of CKD solids, elevated pH values and concentrations of potassium(and other
<br /> constituents)would be expected for CKD impacted groundwater. Groundwater pH values at the Site are
<br /> between 7 and 9, which are similar to values observed in the wells prior to CKD placement in area A2, and
<br /> do not show an increase in pH values or constituent concentrations over time that would be expected if the
<br /> waters were being influenced by CKD leachate. Potassium was not measured prior to CKD placement;
<br /> however, current concentrations are < 25 mg/L and show no increasing trends.
<br /> 8.0 REFERENCES
<br /> Arthur, Michael A., Walter E. Dean, Richard M. Pollastro, George E. Claypool, and Peter A. Scholle 1985.
<br /> Comparative geochemical and mineralogical studies of two cyclic transgressive pelagic limestone units,
<br /> Cretaceous Western Interior Basin, U.S., in Fine-Grained Deposits and Biofacies of the Cretaceous Western
<br /> Interior Seaway: Evidence of Cyclic Sedimentary Processes (FG 4). Tulsa, OK: The Society of Economic
<br /> Paleontologists and Mineralogists (SEPM), p. 16-27.
<br /> Clark, LD and P. Fritz, 1997. Environmental Isotopes in Hydrogeology. Lewis Publishers, New York.
<br /> Cowie, R., Williams, M.W., Wireman, M., Runkel, R.L. 2014. Use of Natural and Applied Tracers to Guide
<br /> Targeted Remediation Efforts in an Acid Mine Drainage System, Colorado Rockies, USA. Water 2014, 6,
<br /> 745-777; doi:10.3390/w6040745.
<br /> ' Dean, W.E. and Arthur, M.A. 1998. Geochemical expressions of cyclicity in cretaceous pelagic limestone
<br /> sequences: Niobrara Formation, Western Interior Seaway, in Stratigraphy and Paleoenvironments of the
<br /> Cretaceous Western Interior Seaway, USA: SEPM Concepts in Sedimentology and Paleontology No. 6. Tulsa,
<br /> OK: The Society of Economic Paleontologists and Mineralogists (SEPM), p. 227-255.
<br /> DRMS, 1999. Technical Revision No. 3(TR-003)to Permit No. M-77348; Colorado Division of Reclamation,
<br /> Mining and Safety, October 15, 1999.
<br /> DRMS, 2012. File No. M-1977-348; Boettcher Limestone Quarry; Requirement for Additional Groundwater
<br /> Characterization/Sampling. Colorado Division of Reclamation, Mining and Safety, June 25, 2012.
<br /> DRMS, 2014. File No. M-1977-348; Boettcher Limestone Quarry; Summary of meeting held May 28, 2014
<br /> regarding groundwater quality. Colorado Division of Reclamation, Mining and Safety, May 30, 2014.
<br /> Eastoe, Christopher, 2019. Personal Communications- Email regarding Tritium Methodology and Radionuclide
<br /> Interference from C. Eastoe (University of Arizona)to S. Harkins(Golder). June 25, 2019.
<br /> Ideal, 1962. Report of Investigations, Boettcher Properties, Colorado. Ideal Exploration Department, Research
<br /> and Development Division, June 18, 1962,
<br /> Ideal, 1977. Development Drilling, 1977, Boettcher, Colorado. Ideal Exploration and Properties Department,
<br /> August 12, 1977.
<br /> Golder, 2010, Groundwater Sampling and Analysis Plan for the Boettcher Limestone Quarry in La Porte,
<br /> Colorado. Golder Associates Inc., Lakewood, Colorado, April 28, 2010.
<br /> Golder, 2012. Groundwater Characterization Plan, Boettcher Limestone Quarry, Laporte, Colorado. Golder
<br /> Associates Inc., Lakewood, Colorado, October 23, 2012.
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