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TABLE 2-4 <br /> CONSTITUENTS EXCEEDING CONCENTRATION LIMITS <br /> FOURTH QUARTER 2007 <br /> FORWARD UNIT <br /> Well ID Constituent Sample Result Concentration Concentration <br /> Limit Basis Limit <br /> MW-01A Bicarbonate 490 UTL 390 <br /> Chromium Hexavalent 0.0055 PQL 0.0020 <br /> Sodium 76 CLGB 63 <br /> MW-02A Bicarbonate 900 UTLV <br /> MW-03 Arsenic 0.0021 PQL <br /> Bicarbonate 690 UTL <br /> Calcium 150 CLGBChloride 170 CLGBChromium Hexavalent 0.0074 PQL <br /> Magnesium 80 CLGB 44 <br /> Potassium 9.1 CLGB 8.9 <br /> Sodium 100 CLGB 57 <br /> Sulfate 150 UTL 62 <br /> Total Dissolved Solids 1200 CLGB 600 <br /> MW-10 Arsenic 0.0032 PQL 0.0020 <br /> Bicarbonate 310 UTL 220 <br /> Chromium Hexavalent 0.0026 PQL 0.0020 <br /> M W-13 Barium 0.58 CLGB 0.52 <br /> Bicarbonate 970 UTL 675 <br /> Chromium Hexavalent 0.0037 PQL 0.0020 <br /> Sodium 93 CLGB 82 <br /> Strontium 1.8 CLGB 1.6 <br /> Sulfate 44 UTL 32 <br /> Total Dissolved Solids 990 CLGB 880 <br /> MW-14 Bicarbonate 1000 UTL 785 <br /> Chromium Hexavalent 0.0034 PQL 0.0020 <br /> MW-15 Bicarbonate 470 UTL 355 <br /> MW-16 Barium 0.61 BL 0.33 <br /> Bicarbonate 950 jBL <br /> 515 <br /> Magnesium 79 68 <br /> Strontium 1.8 1.6 <br /> MW-17 Barium 0.39 0.37 <br /> Calcium 110 UTL 89 <br /> Sodium 46 UTL 42 <br /> Sulfate 79 UTL 67 <br /> MW-18 Arsenic 0.0026 PQL 0.0020 <br /> Chromium Hexavalent 0.0033 PQL 0.0020 <br /> Sulfate 71 UTL 69 <br /> MW-19 Chromium Hexavalent 0.0035 PQL 0.0020 <br /> MW-21 Barium 0.35 BL 0.33 <br /> Bicarbonate 710 BL 515 <br /> MW-23R Chloride 160 BL 138 <br /> Sulfate 280 BL 181 <br /> Total Dissolved Solids 1200 BL 984 <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 4W T.,b1­A,Z4 CL <br /> Geologic Associates <br />