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1697 Cole Boulevard <br />$ui[e 200 <br />Golden, Colorado 80401 <br />Tel: (303) 239-5400 <br />Fax: (303) 239-5454 <br />www.brownandcaldwelL<om <br />September 10, 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 />FiECEI~/E® <br />SEP 12 2003 <br />Division ~i 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 />June 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 June 2003 was conducted on June 19, 2003. <br />The anticipated sampling date fox the June event listed in the Condition #1 <br />Groundwater Sampling Plan was June 19, 2003. Sampling methods followed those <br />outlined in the Condition # 1 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 and from the Dakota <br />aquifer at monitoring well DW-1. Groundwater was not detected in monitoring well <br />MW-001A installed in the Codell sandstone; therefore, MW-OOlA could not be <br />sampled. Samples were analyzed for the parameters listed in Condition #1. The <br />analytical results are summarized in Tables 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-3 is a duplicate sample collected <br />from monitoring well MW-003. Sample MW-006 is an equipment blank collected by <br />pouring bottled distilled water over equipment used at multiple monitoring well <br />locations. <br />P:\Da[a\GEMF-S-P-7~22421V5[ipulation Response\Groundwater Sampling\Sampling ResultsUune 2003Uune 2003 DMG <br />Le[[er.doe <br />E n v i r o n m e n t a l E n g i n e e r s dr C o n s u /,t a n t s <br />