| OCR Text |
Show additional demolition sites have been identified at Arthur. The Arthur Area consists of five soil sites. All five sites have been characterized and demonstrate elevated concentrations of metals. The West Debris Site (AOl) consists of irregularly shaped piles containing predominately soil, wood, slag, laboratory glassware, crucibles, metal shavings, concrete, bricks and other building material. Characterization sampling indicates four of the eleven samples to be elevated in total arsenic (320 parts per million (ppm), 360 ppm and 260 ppm) and(or) total lead (65000 ppm, 38000 ppm and 4100 ppm). Toxicity Characteristic Leaching Procedure (TCLP) performed on a composite of elevated total metal samples was below the Maximum Concentration of Contaminants (MCC). The Sites' overall average, maximum and minimum are listed below. • ARSENIC (ppm) CADMIUM (ppm) LEAD (ppm) SELENIUM (ppm) MINIMUM 40 0.5 120 < 14 MAXIMUM 360 4 65000 < 14 AVERAGE* 146 3 10032 7 The Crucible Site (A04) consists of predominately fire assay debris and other waste from the old Arthur Assay Laboratory. Characterization sampling indicates six of the sixteen samples to be elevated in total arsenic (210 ppm) and(or) total lead (35000 ppm, 37000 ppm, 6100 ppm, 4300 ppm, 15000 ppm and 3400 ppm). Toxicity Characteristic Leaching Procedure performed on a composite of elevated total metal samples was below the MCC. The Sites' overall average, maximum and minimum are listed below. ARSENIC (ppm) CADMIUM (ppm) LEAD (ppm) SELENIUM (ppm) MINIMUM <30 <0.5 70 <30 MAXIMUM 210 4.1 37000 <30 AVERAGE* 63 1.6 6484 15 The Foundry Slag Site (AlO) consists of predominately slag and metal debris from the now demolished Arthur Foundry that produced brass and iron products. Characterization sampling indicates six of the thirty samples collected to be elevated in total arsenic (390 ppm and 393 ppm) and(or) total lead (8100 ppm, 3050 ppm, 3000 ppm, 2140 ppm and 2950 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* 5 July 18, 1996 Rev. C |
