| OCR Text |
Show ARSENIC (ppm) CADMIUM (ppm) LEAD(ppm) SELENIUM (ppm) MINIMUM < 14 <0.5 < IO < 13 MAXIMUM 393 13 8100 130 AVERAGE* 63 3 885 19 The Railroad Debris Site (All) is a pile that was used as an end-of-line barrier for the railroad. The pile consists of oxidized metallic debris, soil and concrete debris. A characterization sample collected by Kennecott personnel indicates elevated total metal lead (876.8 ppm). The Stills Site (A12) is the former location of a RECO plant which produced chemicals for the Arthur Mill floatation process. Characterization sampling indicates three of the eighteen samples are elevated in total arsenic (503 ppm, 817 ppm) and(or) total lead (2700 ppm). The Sites' overall average, maximum and minimum are listed below. ARSENIC (ppm) CADMIUM (ppm) LEAD (ppm) SELENIUM (ppm) MINIMUM 11 < 0.2 3.6 <0.5 MAXIMUM 817 5.78 2700 89.4 AVERAGE* 127 0.9 269 12 C.3 .1.2 Magna Concentrator The Magna Concentrator, built in 1906 and 1907, consisted of crushing, grinding, flotation, and filter plant processing facilities and a molybdenite circuit. The flotation portion was upgraded in 1975 with the old structures demolished in 1991 and 1992. The crushing and grinding sections were closed in 1988 when the Copperton Concentrator came on-line. The facility is currently operating with the original filter plant. The Magna Area consists of three sites. Only two of the three soil sites have been characterized and both demonstrated elevated concentrations of metals. No demolition sites have been identified to date at Magna. The Railroad Slope Site (MOl) is an area consisting of steep slag and metal debris slopes. Characterization sampling indicates six of the fourteen samples collected are elevated in total arsenic (200 ppm, 220 ppm 270 ppm and 240 ppm) and(or) total lead (2300 ppm, 5000 ppm, 3010 ppm, 11000 ppm and 2800 ppm). Toxicity Characteristic Leaching Procedure performed on a composite of elevated total metal samples failed for the lead MCC. The Sites' overall average, maximum and minimum are listed below. Appendix C* 6 July 18, 1996 Rev. C |
