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t <br /> Golder ✓ f%�/97T �� <br /> Associates ` <br /> 1 January 6, 2015 Project No.: 1400159 <br /> Mr. Eric Scott <br /> / Colorado Division of Reclamation Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman St., Room 215 <br /> Denver, Colorado 80203 <br /> ARE: FOURTH QUARTER 2014 GROUNDWATER SAMPLING AT THE BOETTCHER QUARRY <br /> Dear Mr. Scott: <br /> On behalf of Holcim (US) Inc., Golder Associates Inc. is pleased to submit analytical laboratory results for <br /> the fourth quarter 2014 groundwater sampling event at the Boettcher Limestone Quarry near La Porte, <br /> Colorado. Attached are tables summarizing the results and a copy of the laboratory report. In addition to <br /> sampling wells MW-1 through MW-7, a field duplicate at MW-5 (MW-20) and a field blank (MW-15) were <br /> collected. The locations of monitoring wells MW-1 through MW-7 are presented in Figure 1. <br /> If you have any questions, please do not hesitate to call the undersigned at (303) 980-0540. <br /> Sincerely, <br /> GOLDER ASSOCIATES INC. <br /> ara Harkins, P.G. ark cClain, P.E. <br /> Geologist Princi al <br /> Attachments: <br /> Table 1: Summary of Monitoring Results for MW-1 <br /> Table 2: Summary of Monitoring Results for MW-2 <br /> Table 3: Summary of Monitoring Results for MW-3 REC' •`•.-�, <br /> Table 4: Summary of Monitoring Results for MW-4 <br /> Table 5: Summary of Monitoring Results for MW-5 �' <br /> Table 6: Summary of Monitoring Results for MW-6 5A N 14 2015 <br /> Table 7: Summary of Monitoring Results for MW-7 <br /> Figure 1: Location Map DIVISION OF RECLAMATION <br /> Attachment A: ACZ Laboratory Report MININGANDSAFETY <br /> I <br /> t <br /> is\14\1400159\0100\0110\boettcherquarry gwsamp q4 2014 fnl-06jan15\1400159 boettcherquarry gwsamp 4q 2014 fnl-06jan15.docx <br /> Golder Associates Inc. <br /> 44 Union Boulevard,Suite 300 �1 <br /> Lakewood,CO 80228 USA • <br /> Tel: (303)980-0540 Fax: (303)985-2080 www.golder.com IN 0 <br /> Golder Associates:Operations in Africa,Asia,Australasia,Europe,North America and South America <br /> Golder,Golder Associates and the GA globe design are trademarks of Golder Associates Corporation <br />