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Home My WebLink AboutNC0038377_Table 12-2 Mayo Coal Ash COPCs_20150902TABLE 12-2 COAL ASH COPC DETERMINATION MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Constituent Coal Ash Conc. > EPA Soil RSL(') Coal Ash Pore Water 2Lnc. > NC Coal Ash COPC Basis For Coal Ash COPC Determination Aluminum Yes Not Established Yes Above soil RSL Antimony Yes Yes Yes Above soil RSL and groundwater 2L Arsenic Yes Yes Yes Above soil RSL and groundwater 2L Barium Yes Yes Yes Above soil RSL and groundwater 2L Beryllium No No No Below soil RSL and groundwater 2L Boron No Yes Yes Above groundwater 2L Cadmium No No No Below soil RSL and groundwater 2L Calcium Not Established Not Established No Note 3 Chloride Not Established No No Below groundwater 2L Chromium No No No Below soil RSL and groundwater 2L Cobalt Yes Yes Yes Above soil RSL and groundwater 2L Copper No No No Below soil RSL and groundwater 2L Iron No Yes Yes Above groundwater 2L Lead Yes No No Below groundwater 2L Magnesium Not Established Not Established No Note 3 Manganese No Yes Yes Above groundwater 2L Mercury No No No Below soil RSL and groundwater 2L Molybdenum No Not Established No Below soil RSL Nickel No No No Below soil RSL and groundwater 2L Nitrate (as N) Not Established No No Below groundwater 2L Potassium Not Established Not Established No Note 3 Selenium Yes No No Below groundwater 2L Sodium Not Established Not Established No Note 3 Strontium No Not Established No Below soil RSL Sulfate Not Established No No Below groundwater 2L Thallium Yes Yes Yes Above soil RSL and groundwater 2L TDS Not Established Yes Yes Above groundwater 2L Vanadium Yes Yes Yes Above soil RSL and groundwater 2L Zinc No INo I No lBelow soil RSL and groundwater 2L Prepared by: KDF Checked by: VTV/ 0 - Constituent is a coal ash COPC - Constituent is not a coal ash COPC Note 1: See Table 7-3 Note 2: See Tables 7-8 and 12-1 Note 3: Naturally occurring at moderate concentrations in most water bearing units, present at moderate concentrations in many foods and available in dietary supplements. Unlikely to pose potentially unacceptable risk to human health when compared to other coal ash constituents.