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HISTORICAL ANALYTICAL RESULTS <br /> SURFACE WATER <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> SW-1 <br /> Sample Designation SW-1 SW-1 SW-1 SW-1 SW-1 SW-1 SW-1 SW-1 SW-1 SW-1 <br /> Sampling Date 04/19/99 02/19/00 03/05/01 01/08/02 12/17/02 02/17/04 01/05/05 01/03/06 04/15/10 01/27/11 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature,Field(°C) 26.4 17.5 16.6 11 12.7 16.1 14.1 11.9 24.4 10.6 <br /> Electrical Conductivity(umhos/cm) 1,661 1,188 604 2,395 310 2628 293 216 1486 2159 <br /> pH,field(units) 8.28 7.75 7.57 8.29 6.97 8.68 6.43 6.38 8.59 8.58 <br /> Turbitity,Field(NTU) 3 >200 >200 87.5 7200 51.3 48.6 >200 1076 11.7 <br /> Total Dissolved Solids 1,070 778 392 1,700 540 1800 1800 370 910 1500 <br /> Total Suspended Solids 4 1,150 656 20 NR NR NR NR NR NR <br /> Chloride 158 81.7 32.6 300.0 82.0 330 310 35 140 230 <br /> Sulfate 390 256 108 710 210 650 640 85 350 470 <br /> Nitrate-Nitrite as Nitrogen <0.0049 0.51 0.188 0.2 0.94 <0.045 <0.23 1.1 <0.014 <0.014 <br /> Calcium 64 120 510 44 84 100 <br /> Potassium 11 5.6 34 8.61 6.2 7.0 <br /> Magnesium 41 76 260 22.2 48 66 <br /> Sodium 77 360 340 51.7 210 320 <br /> Volatile Organic Compounds NO) <br /> Acetone 3.2 3.4 <4.6 <4.6 <br /> All Other Compounds ND ND ND ND <br /> Semivolatile Organic Compounds(EPA Method 8270C) <br /> All Compounds ND ND <br /> Constituents of Concern Parameters <br /> Alkalinity,Bicarbonate NR 190 NR NR 160 330 380 140 290 410 <br /> Alkalinity,Carbonate NR <0.808 NR NR <0.54 <5.0 32 <2.2 20 23 <br /> Total Alkalinity NR 190 NR NR 160 330 420 NR 270 370 <br /> Cyanide,Total NR <0.002 NR NR NR NR <0.025 NR 0.0054 NR <br /> Sulfide NR <0.5 NR NR NR NR <0.10 NR <0.050 NR <br /> Total Organic Carbon NR 9.79 NR NR NR NR 6.7 NR 4.9 NR <br /> Chemical Oxygen Demand NR 87.9 NR NR NR NR NR NR NR NR <br /> Dissolved Oxygen NR 4.43 NR NR NR NR NR NR NR NR <br /> Oil and Grease NR <1 NR NR NR NR NR NR NR NR <br /> Organic compounds detected in one or more samples are listed. <br /> NR=Not Requested <br /> ND=Not Detected <br /> ISV=Insufficient Volume <br />