REP34097 - Laserfiche WebLink

Home Browse Search

1 1.0 INTRODUCTION This report summarizes the results from the second third-party monitoring trip to Battle Mountain Resources, Inc.'s (BMRI) San Luis Gold Projeci in Costilla County, Colorado, which took place on March 4 and 5, 1993. The report contains information on: summary and assessment of sampling activities; summary and assessment of analytical activities, and recommendations for future sampling. The following documentation and dat& are included as appendices in this report: Sampling Observation Documentation, consisting of copies of field notes (Appendix A); Chain-of-Custody Documentation (Appendix B~; Analytical Results, consisting of verbatim analytical results from Core Laboratories (Appendix C), and Laboratory Quality Control Report (Appendix D). 2.0 SUMMARY AND ASSESSMENT OF SAMPLING ACTIVITIES One surface water location and three process points were sampled during the March 4-5, 1993 sampling trip. The sampling locations were: RS-5 in the Rito Seco Creek; the lower tailings pond; the upper tailings pond, and the collection pond. No ground~ater samples were able to be collected on this trip because the groundwater pump was not operational. The shaft seating at the bottom of the pump was cracked, and chips stopped the shaft from turning and making a seal. The condition of the pump was discovered on the second day of the sampling, March 5th. There was no spare pump at the facility, and no one on site could repair the pump. Consequently, only surface water and quality control samples were collected. Three sampling quality control (QC) samples were taken: one field blank, one duplicate (at the collection pond) and one rinse blank (taken after collection of sample at RS-5). A summary of the types of samples collected at each location and the analyzes determined is provided in Table 1. An assessment of the sampling activities is provided below. The weather on March 4 was sunny with some clouds, with temperatures in the 30-40°F range. Sampling conditions were much better (warmer) than the first third-party monitoring event. Rito Seco creek was covered with approximately 2-12 inches of ice, which was broken with a pick and chisel; the ice breaking did disturb some of the sediment in the creek. Snow covered most of the creek. Many of the recommendation suggested in the first third-party monitoring summary report were incorporated into the second third-parry monitoring trip, including: field notes were written in bound 5eld books; a filter was placed in the barrel filter for collection of the rinse blank; dissolved oxygen and specific conductance measurements were taken at the process point sampling locations; second-stage deionized (DI) water from the on-site BMRI laboratory was used for final rinses and collection of field and rinse blanks; the samples were checked with pH paper after collection to ensure that they were preserved to the proper pH; samples for nitrate+nitrite were preserved with sulfuric acid to pH<2; QA/QC RCG/Hagler, Bailly, Inc.