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R.D. Piland and Associates consultants believes the facility held <br /> no special permits for any other waste water treatment system and <br /> had no need for any. <br /> Disposal of Solid Waste at Local Landfill <br /> Solid waste consisting of paper, boxes, metal, wood and other <br /> materials was collected into a dumpster. This dumpster was <br /> maintained by an independent contractor who disposed of the <br /> contents at the local landfill located across the valley north of <br /> the Roaring Fork River. <br /> On-Site Waste Disposal <br /> Two areas on the property as shown on Figure 2 were also used to <br /> dispose of primarily solid wastes. There were also a few cans of <br /> spray paint, lubricating oil, and solvent observed in these two <br /> areas. The equipment parking area at the loading dock on the <br /> , east side of the main building contains an area of approximately <br /> 60 square feet where hydraulic oil and other petroleum <br /> hydrocarbons have leaked onto the concrete pad (Figure 3) . A <br /> discarded lead-acid battery was left just outside of the west <br /> door of the packwall plant (Photograph 11) . <br /> 4.9 POSSIBLE ON-SITE DISCHARGES OF HAZARDOUS WASTES <br /> 4.9.1 Possible Discharge of PCB-Containing Fluids <br /> Three electrical transformers are located on the property. <br /> Transformers often contain PCBs. PCBs are a regulated substance <br /> whose uncontrolled disposal can create environmental problems. <br /> However, these transformers have been tested and all show PCB <br /> levels at less than the maximum allowed 50 parts per million. <br /> There is no evidence of any spills from the transformers and <br /> there does not appear to be any reason for concern. <br /> 4.9.2 Possible Discharge of Water with Extreme pH <br /> It is possible that the bulk storage of crushed limestone and <br /> magnetite could create extremely high and low pH water <br /> respectively when rain water comes in contact with the materials <br /> in the stockpiles stored out in the open. Limestone is slowly <br /> dissolved by rain water, which may have a pH as low as 4. The <br /> dissolution of limestone would raise the pH up into the alkaline <br /> range above 7, and under certain conditions the pH could reach <br /> values greater than 10. Water with a pH greater than 12 is <br /> considered hazardous by characteristic. Similarly, the iron ore <br /> (magnetite) contains a significant amount of iron pyrite which <br /> will oxidize upon contact with water, producing sulfuric acid. <br /> This acid drainage can sometimes reach levels below a pH of 2 <br /> 21 <br />