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Show • . material. Depth to natural ground is 1 foot at th.e east end and increases to greater than 2 feet at the west end. EAST END DEBRIS PILES: The east end debris piles comprise the eastern 550 feet of the Site and parallels the north side of the Car Shop Building. This area appears to have been a dump and contains a silty, sandy gravel mixed with a variety of debris including bricks, metal, and slag. S~ples MG95Z0004, MG95Z0009 through MG95Z001 l, and MG96Z0001 and MG95Z0002 were collected from this material. The origin of this material is thought to be in part from the Car Shop and from debris, collected site-wide, which was loaded into railcars and side-dumped along the slope. 1 SAMPLE COLLECTION •• Fifteen characterization samples were collected from the Site and assigned the identification numbers MG95Z0001 through MG95Z0011, MG95Z0036 and MG95Z0037, and MG96Z0001 and MG96Z0002. Sample locations were located in the field using a measuring tape and were surveyed later using the Global Positioning System. Nine of the samples were four, five, or seven-point composite samples. Two samples were 1 foot vertical channel samples. Sampling depth was between 0.6 feet and 2 feet. Samples MG95Z0036 and MG95Z0037 were collected from the west end of the site for the purpose of determining the limits of the contamination discovered from the previous sampling. The samples were three and five-point composite samples. Samples MG96Z0001 and MG96Z0002 were collected to further define the limits of the contaminated soil. These samples were four and five-point composite samples collected from 0 to 6 inches below the surface. Refer to Drawing No. 507-T-0135 for the sample locations. ANALYTICAL RESULTS Samples MG95Z0001 thru MG95Z0011 were analyzed at Datachem Laboratory for total arsenic, cadmium, lead, and selenium concentrations. Samples MG95Z0036 and MG95Z0037 were analyzed at Chemtech Laboratory for total arsenic, cadmium, lead, and selenium concentrations. Samples MG96Z0001 and MG96Z0002 were analyzed at Chemtech Laboratory for total arsenic, barium, cadmium, chromium, mercury, lead, selenium, and silver concentrations. One sample was split as part of quality assurance and quality control (QA/QC) procedures and analyzed at KEL. The samples were analyzed using United States Environmental Protection Agency (EPA) Methods 3050 and 6010. The results of the analysis indicated both the east end debris piles and west end soils area contain material elevated in lead and arsenic. Arsenic concentrations of the west end soils range from 46 to 240 parts per million (ppm) and lead values range from 1300 to 2800 ppm. Lead concentrations of the east end debris piles ranged from 3010 to 11000 ppm and arsenic ranged from 178 to 270 ppm. Two samples were collected from the main pile material and were found to contain low concentrations of all analytes. Sampling and total metals • 1 Information concerning source of material from Kennecott employee . MOlcrpt.wpd* 2 July 22, 1996 Rev. 0 |
