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Show • BONNEVILLE AREA BONNEVILLE GATE HILLSIDE SITE (B02) CHARACTERIZATION SAMPLING REPORT • INTRODUCTION The Bonneville Gate Hillside Site is located southwest of the town of Magna and immediately west of the Bonneville Gate (Dwg. No. 507-T-0146). The site is defined by strongly discolored, copper oxide rich soils that are a result of an in-situ precious metals process. The site locally contains areas void of vegetation. In February 1995 eight characterization soil samples were collected from the site and analyzed at Datachem Laboratory for arsenic, cadmium, lead, and selenium, concentrations. The results of the analysis indicated low concentrations of all analytes. One of the samples was split and analyzed at Kennecott Environmental Laboratory (KEL) for arsenic, cadmium, barium, chromium, mercury, lead, selenium, silver, and copper concentrations. The results of the analysis indicated low concentrations of all metals except copper. This report documents the sampling effort. LOCATION AND DESCRIPTION • The Bonneville Gate Hillside Site is located southwest of the town of Magna and immediately west of the Bonneville Gate and covers an area of approximately 8 acres (600 feet by 600 feet) . The topography at the site consists of highly eroded, hummocky slopes that are deeply incised by a northeast-southwest trending drainage. The site is defined by strongly discolored, copper oxide-rich soils. The discoloration is a result of a waste product produced by an in-situ precious metals operation. The waste has since been removed but residual copper oxide remains. Locally there are areas of little or no vegetation. SCOPE OF WORK A total of eight soil samples were collected from the site and were either three or five-point composite samples. The samples were collected from Oto 4 inches or Oto 6 inches below the surface in the areas that displayed the worst vegetation growth and had the strongest discoloration. ANALYSIS AND RESULTS • Six of the samples were analyzed at Datachem Laboratory for arsenic, cadmium, lead and selenium concentrations. One sample was split as part of Quality Assurance and Quality Control (QA/QC) Procedures and analyzed for arsenic, barium, cadmium, chromium, copper, gold, lead, mercury, selenium and silver at KEL. An additional sample was collected to determine if the soil can be recycled to extract the copper by flotation (see attachment). The United States Environmental Protection Agency (EPA) Methods 3050 and 6010 were used for the preparation b02crpt. wpd * July 22, 1996 Rev. 0 |
