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Ms Amy Eschberger Project No. 18107649 <br /> Colorado Division of Reclamation,Mining,and Safety October 10,2018 <br /> If you have any questions or comments about this request, please contact the undersigned at(303) 980-0540. <br /> Sincerely, <br /> Golder Associates Inc. <br /> P_. <br /> Sara Harkins, PG Randy March, PE, PG <br /> Senior Project Geochemist Principal Geological Engineer <br /> ELH/SAH/ds <br /> CC: Derrick Dease, Holcim (US) Inc. <br /> Attachments: Table 1 —Proposed Analyte List <br /> htlps//golderassociates sharepoint com/sdes/33029g/delrverablesftechmemosftm_techmmsion_r1_10oct1 8/1 81 0 784 9_tm_holcim_techrevlsl0n_rev1_100Ct18 docx <br /> References <br /> Agency for Toxic Substances and Disease Registry (ATSDR), 2001. Public Health Statement of Asbestos <br /> CAS* 1332-21-4. Available at: https://www.atsdr.cdc.govfToxProfiles/tp6l-cl-b.pdf <br /> Golder, 2013. Proposed Changes to the Analytical List for Groundwater sampling at the Boettcher Quarry. Project <br /> Number 103-80640 February 5, 2013 <br /> United States Environmental Protection Agency (USEPA),1980. Ambient Water Quality Criteria for Chlorinated <br /> Phenols. EPA 440/5-80-032, October 1980. <br /> USEPA, 1992. Secondary Drinking Water Regulations: Guidance for Nuisance Chemicals, EPA 810/K-92-01, July <br /> 1992. <br /> USEPA, 2002. Toxicological Review of Phenol CAS# 108-95-2, EPA/635/R-02/006, September 2002. <br /> World Health Organization (WHO), 1996. Guidelines for drinking-water quality, 2nd ed. Vol. 2. Health criteria and <br /> other supporting information. <br /> V GOLDER 3 <br />