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1697 Cole Boulevard <br />Suire 200 <br />Golden, Colorado 80401 <br />Tel: (303) 239-5400 <br />Pax: (303) 239-5454 <br />www.brownandcaldweltmm <br />December 30, 2003 <br />Mr. Anthony J. Waldron '~ <br />Environmental Protection Specialist <br />Division of Minerals and Geology / <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />!~~r~t. y~~~~= <br />DEC 3 i 2003 <br />Division of Minerals and Geology <br />Subject: Transmittal of Groundwater Analytical Results <br />GCC Rio Grande Red Rock Plant and Limestone Mine/ <br />Pueblo, Colorado <br />File No. M-2002-004 / <br />September 2003 Sampling Results / <br />Dear Mr. Waldron: <br />With this letter, Brown and Caldwell is transmitting to the Division of Minerals and <br />Geology (DMG) the analytical results for groundwater samples collected at the GCC <br />Rio Grande Red Rock Plant and Limestone Mine Site. Samples were collected and <br />analyzed to satisfy Condition #1 of the Mined Land Reclamation Board's approval of <br />GCC Rio Grande's 112c mining permit application: Baseline Water Quality Sampling. <br />Groundwater sampling for the month of September 2003 was conducted on <br />September 24, 2003. Sampling methods followed those outlined in the Condition # 1 <br />Groundwater Sampling Plan dated March 2003. <br />Groundwater samples were collected from the Saint Charles River alluvial aquifer at <br />monitoring well locations MW-002 and MW-004. Groundwater was not detected in <br />monitoring wells MW-001A and MW-003; therefore, MW-OOlA and MW-003 could <br />not be sampled. Since the pump fox DW-1 was not in place at the time of sampling, <br />no samples were taken of the DW-1 Dakota aquifer well. Samples were analyzed for <br />the parameters listed in Condition #1. The analytical results are summarized in Tables <br />1, 2, 3, and 4. <br />Attachment A presents copies of the analytical reports prepared by ACZ Laboratories, <br />Inc. and Reservoirs Environmental, Inc. Sample D-6 is a duplicate sample collected <br />from monitoring well MW-002. Sample MW-006 is an equipment blank collected by <br />pouring bottled distilled water over equipment used at multiple monitofing well <br />locations. <br />P:\Data\GEMF-S-P-T\22421\Stipula6on Response\Groundwater Sampling\Sampling Results\Sept 2IX13\Sept 2003 DMG <br />Letter.doc <br />E n v i r o n m e n t a l E n g i n e e r s e{1' C o n s u l t a n t s <br />