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June 29, 2004 <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 />~~~~~~~~ <br />JUN 3 0 2004 <br />Division of Minerals & GeeloBY <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 />February 2004 Sampling Results <br />Dear Mx. Waldron: <br />With this letter, Brown and Caldwell is transmitting to the Division of Minerals and <br />Geology (DMG) the analytical results fox 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 February 2004 was conducted on <br />February 26, 2004. 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, MW-003, and MW-004. Groundwater was not <br />detected in monitoring well MW-OOlA and therefore could not be sampled. Since the <br />generator fox the DW-1 pump was not installed at the time of sampling, no samples <br />were taken of the DW-1 Dakota aquifer well. Samples were analyzed fox the <br />parameters listed in Condition #1. The analytical results axe summarized in Tables 1, <br />2, 3, and 4. <br />Attachment A presents copies of the analytical reports prepared by ACZ Laboratories, <br />Inc. and Reserooixs Environmental, Inc. Sample D-11 is a duplicate sample collected <br />from monitoring well MW-002. <br />\\bcden03\projec[s\Data\GEMF-S-P-'D22421\Stipulation Response\Groundwater Sampling\Sampling Results\Feb 2tX14\Feb <br />20(kl DMG t.etter.doc <br />