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Golder '� ✓ <br /> Associates 14-e7 <br /> July 29, 2014 Project No.: 1400159 <br /> Mr Eric Scott <br /> olorado Division of Reclamation Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman St., Room 215 <br /> Denver, Colorado 80203 <br /> RE: SECOND 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 second 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-7 (MW-20) and a field blank (MW-15) were <br /> collected. Due to an oversight, laboratory analyses for dissolved metals were not conducted for MW-20. <br /> 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 /> Sara Harkins Randy March, P.E., P.G. <br /> Geologist Principal Geological Engineer <br /> Attachments: <br /> Table 1: Summary of Monitoring Results for MW-1 t' ^C'vD <br /> Table 2: Summary of Monitoring Results for MW-2 4� V G <br /> Table 3: Summary of Monitoring Results for MW-3 <br /> Table 4: Summary of Monitoring Results for MW-4 A d Q 1 '- <br /> Table 5: Summary of Monitoring Results for MW-5 <br /> Table 6: Summary of Monitoring Results for MW-6 DIVISION OF RECLAMATION <br /> Table 7: Summary of Monitoring Results for MW-7 ` MININGANDSAFEW - <br /> Figure 1: Location Map <br /> Attachment A: ACZ Laboratory Report <br /> is\14\1400159\0110\boeftcherquarry gwsamp q2 2014_fnl-29ju114\1400159 boettcherquarry gwsamp 2q 2014_fnl-29jul14.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 <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 />