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TABLE 2-4 <br />CONSTITUENTS EXCEEDING CONCENTRATION LIMITS <br />® FOURTH QUARTER 2006 <br />FORWARD UNIT <br />v <br />Well ID <br />Constituent <br />Sample Result <br />Concentration <br />Limit Basis <br />Concentration <br />Limit <br />MW -01 <br />Bicarbonate <br />730 <br />UTL <br />390 <br />Calcium 170 CLGB <br />110 <br />Chloride 170 CLGB <br />97 <br />Magnesium 83 CLGB <br />54 <br />Potassium <br />8.7 <br />CLGB <br />8.6 <br />Sodium 100 CLGB <br />63 <br />Sulfate 150 UTL <br />84 <br />Total Dissolved Solids 1200 CLGB <br />800 <br />MW -02A <br />Arsenic <br />0.0022 <br />PQL <br />0.0020 <br />Sulfate 46 UTL <br />45 <br />MW -03 <br />Barium <br />0.0030 <br />CLGB <br />0.24 <br />Bicarbonate 550 UTL <br />340 <br />Calcium 120 CLGB <br />91 <br />Chloride 120 CLGB <br />94 <br />Chromium VI 0.0033 PQL <br />0.0020 <br />Magnesium 58 CLGB <br />44 <br />Sodium 86 CLGB <br />57 <br />Sulfate 70 UTL <br />62 <br />Total Dissolved Solids <br />850 <br />CLGB <br />600 <br />MW -10 <br />Arsenic <br />0.0021 <br />PQL <br />0.0020 <br />Bicarbonate 300 UTL <br />220 <br />MW -13 <br />Arsenic <br />0.0021 <br />PQL <br />0.0020 <br />Barium <br />0.57 <br />CLGB <br />0.52 <br />Bicarbonate 1000 UTL <br />675 <br />Calcium 170 CLGB <br />150 <br />Magnesium <br />85 <br />CLGB <br />77 <br />Sodium 97 CLGB <br />82 <br />Strontium <br />1.8 <br />CLGB <br />1.6 <br />Sulfate <br />39 <br />UTL <br />32 <br />Total Dissolved Solids 1000 CLGB <br />880 <br />MW -14 <br />Arsenic <br />0.0021 <br />PQL <br />0.0020 <br />Bicarbonate 940 UTL <br />785 <br />Chromium VI 0.0023 PQL <br />0.0020 <br />Tetrachloroethylene 0.60 PQL <br />0.50 <br />Total Dissolved Solids <br />1200 <br />CLGB <br />1100 <br />MW -15 <br />Bicarbonate <br />460 <br />UTL <br />355 <br />Chromium VI 0.0021 PQL <br />0.0020 <br />MW -16 <br />Barium <br />0.59 <br />BL <br />0.33 <br />Bicarbonate <br />810 <br />BL <br />510 <br />Strontium <br />1.7 <br />BL <br />1.6 <br />MW -17 <br />Barium <br />0.5 <br />UTL <br />0.37 <br />Calcium 110 UTL <br />89 <br />Sodium 50 UTL <br />42 <br />MW -18 <br />Arsenic <br />0.0029 <br />PQL <br />0.0020 <br />Bromoform 1.8 PQL <br />0.50 <br />Chromium VI 0.0049 PQL <br />0.0020 <br />Dibromochloromethane 0.63 PQL <br />0.50 <br />Sulfate 73 UTL <br />69 <br />MW -19 <br />Bromoform <br />1.8 <br />PQL <br />0.50 <br />Dibromochloromethane 0.70 PQL <br />0.50 <br />MW -21 <br />Barium <br />0.47 <br />BL <br />0.33 <br />Bicarbonate <br />1000 <br />BL <br />512 <br />Magnesium 71 BL <br />68 <br />Notes: <br />CLGB = Concentration Limit Greater Than Background. <br />CLGB = Taken from Table 5-12 of Revised Post -Closure Maintenance Plan, Forward Landfill, by Kleinfelder, dated 11/2/94. <br />UTL = Upper Tolerance Limit. <br />UTL = Taken from Table 5-14 of Revised Post -Closure Maintenance Plan, Forward Landfill, by Kleinfelder, dated 11 /2/94. <br />® PQL = Practical Quantitation Limits. <br />BL = Background Limit derived from historical data at MW -20 and MW -23R. Mean + (2.375 x Standard Deviation). <br />FLF 4Qa Tebl-1.24 CL <br />