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HISTORICAL ANALYTICAL RESULTS <br />GROUNDWATER <br />CORRAL HOLLOW SANITARY LANDFILL <br />MW -7 <br />Units: ing/I, unless noted <br />Sample Designation MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 MW -7 <br />Saznpting Date 8/19/03 10/8/03 2/11/04 4/23/04 7/8/04 10/21/04 1/5/05 5/31/05 7/26/05 10/13/05 2/1/06 4/27/06 7/13/06 10/3/06 1/29/07 <br />Constituents of Concern <br />Alkalinity as CaCO3 <br />NA <br />230 <br />NA <br />NA <br />NA <br />220 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Carbonate Alkalinity as CaCO3 <br />NA <br /><20 <br />NA <br />NA <br />NA <br /><5.0 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br /><6 <br />NA <br />Bicarbonate Alkalinity as HCO3 <br />NA <br />230 <br />NA <br />NA <br />NA <br />220 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />244 <br />NA <br />Hydroxide Alkalinity as CaCO3 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cyanide, Total <br />NA <br /><0.0050 <br />NA <br />NA <br />NA <br /><0.0050 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Sulfide <br />NA <br />0.56 <br />NA <br />NA <br />NA <br /><0.1 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Total Organic Carbon <br />NA <br /><0.19 <br />NA <br />NA <br />NA <br /><0.80 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Nitrate -Nitrite as Nitrogen <br />2.8 <br />4 <br />5.2 <br />6.1 <br />5.7 <br />5.4 <br />5 <br />5.4 <br />5.1 <br />4.9 <br />4 <br />5 <br />5.1 <br />5.1 <br />5 <br />Sulfate <br />440 <br />360 <br />360 <br />380 <br />370 <br />360 <br />350 <br />360 <br />370 <br />360 <br />330 <br />350 <br />330 <br />330 <br />350 <br />Calcium <br />NA <br />96 <br />100 <br />NA <br />NA <br />100 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />102 <br />NA <br />Potassium <br />NA <br />3.5 <br />3.9 <br />NA <br />NA <br />3.9 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />44.8 <br />NA <br />Magnesium <br />NA <br />39 <br />41 <br />NA <br />NA <br />41 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />3.26 <br />NA <br />Sodium <br />NA <br />170 <br />170 <br />NA <br />NA <br />180 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />190 <br />NA <br />Metals <br />Aluminum, Dissolved <br />NA <br />0.15* <br />0.029 <br /><0.0099 <br />NA <br /><0.10 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Antimony, Dissolved <br />NA <br /><0.044 <br />0.014* <br />0.012* <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Arsenic, Dissolved <br />NA <br />0.044* <br /><0.0098 <br />0.037* <br />NA <br /><0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Bariwn, Dissolved <br />NA <br />0.03* <br />0.021* <br />0.016* <br />NA <br /><0.10 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Beryllium, Dissolved <br />NA <br /><0.0024 <br />.00080* <br /><0.0006 <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Boron, Dissolved <br />NA <br />NA <br />3.1 <br />NA <br />NA <br /><0.05 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cadmium, Dissolved <br />NA <br /><0.0084 <br /><0.0021 <br /><0.0021 <br />NA <br /><0.0005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chromium, Total Dissolved <br />NA <br />0.015* <br />0.0023* <br /><0.0019 <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chromium Hexavalent <br />NA <br />0.0075 <br /><0.0017 <br /><0.0050 <br />NA <br /><0.0050 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Cobalt, Dissolved <br />NA <br /><0.010 <br /><0.0025 <br /><0.0025 <br />NA <br /><0.040 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Copper, Dissolved <br />NA <br />0.012* <br /><0.0008 <br /><0.0008 <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Iron, Dissolved <br />NA <br />0.091 <br /><0.0038 <br /><0.0038 <br />NA <br /><0.020 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Lead, Dissolved <br />NA <br /><0.034 <br /><0.0086 <br /><0.0086 <br />NA <br /><0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Manganese, Dissolved <br />NA <br />0.0056* <br />0.0014* <br /><0.0003 <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Mercury, Dissolved <br />NA <br /><0.032 <br /><.000025 <br /><0.000025 <br />NA <br /><0.0002 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Nickel, Dissolved <br />NA <br />0.022* <br /><0.0010 <br />0.0077* <br />NA <br /><0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Selenium, Dissolved <br />NA <br /><0.052 <br />0.021* <br /><0.013 <br />NA <br /><0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Silver, Dissolved <br />NA <br /><0.040 <br /><0.010 <br /><0.010 <br />NA <br /><0.010 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Thalliun,Dissolved <br />NA <br />0.1* <br /><0.0088 <br />0.018* <br />NA <br /><0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Tin, Dissolved <br />NA <br />130 <br /><33 <br /><33 <br />NA <br /><0.250 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Vanadium, Dissolved <br />NA <br />0.024* <br />0.0092* <br />0.0083* <br />NA <br /><0.040 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Zinc, Dissolved <br />NA <br />0.024* <br />0.0045* <br /><0.0005 <br />NA <br /><0.A10 <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Setnivolatile Organic Compounds (82701 <br />Bis(2-Ethylhexyl) Phthalate <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />All Other Compounds <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Organo -Phosphorus Pesticide(8141) <br />All Compounds <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chlorinated Herbicides (8151) <br />All Compounds <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />Organochlorine Pesticides and Polychorinated <br />Biphenyl's (PCBs) (8080) <br />All Compounds <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NA <br />NR = Not Requested <br />ND = Not Detected <br />* = Trace concentration <br />[1] = This analytical result appears to be anomalous aNA therefore was not used in the statistical evaluation procedures. <br />