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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />CORRAL HOLLOW SANITARY LANDFILL <br />MW -9A <br />Units: mg/l, unless noted <br />Sample Designation MW -9A MW -9A MW -9A MW -9A MW -9A MW -9A MW -9A MW -9A MW -9A MW -9A <br />Sampling Date 5/21/12 7/16/12 10/15/12 1/28/13 4/15/13 7/18/13 10/17/13 1/13/14 2/19/14 5/2/14 <br />Constituents of Concern Parameters <br />Alkalinity as CaCO3 <br />95 <br />92 <br />NR <br />88 <br />NR <br />NR <br />NR <br />85 <br />NR <br />NR <br />Carbonate Alkalinity as CaCO3 <br /><2.5 <br /><2.5 <br />NR <br /><2.5 <br />NR <br />NR <br />NR <br /><2.5 <br />NR <br />NR <br />Bicarbonate Alkalinity as I-ICO3 <br />120 <br />110 <br />NR <br />110 <br />NR <br />NR <br />NR <br />100 <br />NR <br />NR <br />Hydroxide Alkalinity as CaCO3 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Cyanide <br /><0.0016 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Sulfide <br /><0.050 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Total Organic Carbon <br />12 <br />NR <br />NR <br />—,—NR <br />NR <br />---...--NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nitrate -Nitrogen <br />34 <br />34 <br />34 <br />36 <br />36 <br />33 <br />36 <br />34 <br />NR <br />36 <br />Sulfate <br />21 <br />17 <br />16 <br />15 <br />16 <br />14 <br />14 <br />_ <br />15 <br />NR <br />14 <br />Calcium <br />61 <br />NR <br />NR <br />66 <br />NR <br />NR <br />NR <br />69 <br />NR <br />NR <br />Potassium <br />8.7 <br />NR <br />NR <br />5.1 <br />NR <br />NR <br />NR <br />3.6 <br />NR <br />_ <br />NR <br />Magnesium <br />23 <br />NR <br />NR <br />18 <br />NR <br />NR <br />NR <br />17 <br />NR <br />NR <br />_ _ <br />Sodium <br />94 <br />NR <br />NR <br />62 <br />NR <br />NR <br />NR <br />66 <br />NR <br />NR <br />Metals <br />_ <br /><0.0059 <br />(EPA Method 3520/8270) <br />NR <br />NR <br />NR <br />_ <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Dissolved <br /><0.026 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR_ <br />NR <br />NR <br />_Aluminum, <br />Antimony, Dissolved <br /><0.010 <br />NR <br />NR <br />_NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />NR <br />NR <br />NR <br />Arsenic, Dissolved <br />0.0052 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Barium, Dissolved <br />0.027 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />_NR_ <br />NR <br />NR <br />Beryllium, Dissolved <br /><0.001 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Boron, Dissolved <br />N/A <br />NR <br />NR <br />NR_ <br />N_R_ <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cadmium, Dissolved <br /><0.001 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Chromium, Total Dissolved <br />0.030 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />Chromium Hexavalent <br />0.030 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR_ <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br /><0.005 <br />NR_ <br />NR <br />NR <br />NR <br />NR <br />NR <br />_ <br />NR <br />NR <br />NR <br />Copper, Dissolved <br /><0.0023 <br />NR <br />NR <br />NR_ <br />NR <br />NR <br />NR <br />NR_ <br />NR <br />NR <br />Iron, Dissolved <br /><0.005 <br />NR <br />NR <br />NR_ <br />NR <br />NR <br />NR <br />NR <br />Lead, Dissolved <br /><0.001 <br />NR <br />NR <br />__NR__ <br />NR <br />NR_ <br />NR <br />NR <br />---NR <br />NR <br />_ <br />NR <br />_ <br />NR <br />Manganese, Dissolved <br />0.0017 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Mercury, Dissolved <br />0.000035 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nickel, Dissolved <br />0.00098 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Selenium, Dissolved <br />0.0035 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Silver, Dissolved <br /><0.0011 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Tballium, Dissolved <br /><0.015 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Tin, Dissolved <br /><0.005 <br />NR <br />NR <br />_NR <br />NR <br />_ <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Dissolved <br />0.0045 <br />NR <br />NR <br />NR <br />_ <br />N_R <br />NR <br />NR <br />NR <br />NR <br />NR <br />_Vanadium_, <br />Zinc, Dissolved <br />Semivolatile Organic Compounds <br />_ <br /><0.0059 <br />(EPA Method 3520/8270) <br />NR <br />NR <br />NR <br />_ <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Bis (2-ethylhexyl) Phthalate <br />All Compounds ND NR NR NR NR NR NR NR NR NR <br />Organophosphate Pesticides <br />(EPA Method 8141A) <br />All Compounds ND NR NR NR NR NR NR NR NR NR <br />* = Trace Concentration <br />[ 1 ] This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br />( 1) Parameter also detected in one or more quality control blanks <br />ND = Not Detected <br />NM = Not Measured <br />NA = Not Reunited <br />