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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> ® CORRAL HOLLOW SANITARY LANDFILL <br /> MW-11A <br /> Units:mgA,unless noted <br /> SarnpleDesignation MW-11A MWAIA MW-11A <br /> Sampling Date 5/21/12 7/16/12 10/15/12 <br /> Constituents of Concern Parameters <br /> Alkalinity as CaCO3 530 560 NR <br /> Carbonate Alkalinity as CaCO3 <5.0 <5.0 NR <br /> Bicarbonate Alkalinity as HCO3 640 680 NR <br /> Hydroxide Alkalinity as CaCO3 N/A NR NR <br /> Cyanide <0.0016 NR NR <br /> Sulfide <0.050 NR NR <br /> Total Organic Carbon 3.5 NR NR <br /> Nitrate-Nitrogen 2.9 2.5 2.3 <br /> Sulfate 68 63 63 <br /> Calcium 130 NR NR <br /> Potassium 7.5 NR NR <br /> Magnesium 43 NR NR <br /> Sodium 160 NR NR <br /> Met <br /> Aluminum,Dissolved <0.026 NR NR <br /> Antimony,Dissolved <0.010 NR NR <br /> Arsenic,Dissolved 0.0022 NR NR <br /> Barium,Dissolved 0.027 NR NR <br /> Beryllium,Dissolved <0.001 NR NR <br /> Boron,Dissolved N/A NR NR <br /> Cadmium,Dissolved <0.001 NR NR <br /> Chromium,Total Dissolved <0.001 NR NR <br /> Chromium Hexavalent 0.00023 NR NR <br /> Cobalt,Dissolved <0.005 NR NR <br /> Copper,Dissolved <0.0023 NR NR <br /> Iron,Dissolved <0.005 NR NR <br /> Lead,Dissolved <0.0002 NR NR <br /> Manganese,Dissolved 0.017 NR NR <br /> Mercury,Dissolved 0.000052 NR NR <br /> Nickel,Dissolved 0.0022 NR NR <br /> Selenium,Dissolved 0.001 NR NR <br /> Silver,Dissolved <0.00I I NR NR <br /> Thallium,Dissolved <0.015 NR NR <br /> Tin,Dissolved <0.005 NR NR <br /> Vanadium,Dissolved 0.0034 NR NR <br /> Zinc,Dissolved <0.0059 NR NR <br /> Semivolatile Organic Compounds(EPA Method 3520/8270) <br /> Bis(2-ethylhexyl)Phthalate <br /> All Compounds ND NR NR <br /> Organoohos 1p tete Pesticides <br /> (EPA Method 8141A) <br /> All Compounds ND NR NR <br /> »=Trace Concentration <br /> [l]This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br /> (I)Parameter also detected in one or more quality control blanks <br /> ND=Not Detected <br /> NM=Not Measured <br /> NA=Not Required <br />