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Inorganic Concentration Limits vs. Second Quarter 2006 Sampling Event Results <br /> Forward Landfill <br /> MW-01 MW-02A MW-03 MW-10 <br /> Parameter May-06 I CLGB UTL BL PQL May-06 CLGB UTL BL PQL May-06 CLGB UTL BL PQL May-06 CLGB UTL BL PQL <br /> Arsenic 0.0032 0.01 0.0035 0.0020 0.0028 0.0020 0.0028 0.0020 <br /> Barium 0.21 0.31 0.34 0.85 0.21 0.24 0.22 0.22 <br /> Bicarbonate 380 390 830 880 300 340 310 220 <br /> 0=1011111110111 11 <br /> Chromium,Hexavalent 0.0062 0.0020 <2.0 0.0020 0.0062 0.0020 0.0045 0.0020 <br /> Magnesium 40 54 65 98 33 44 29 42 <br /> Nitrate 3.8 80 5.4 80 4.6 80 4.2 32 <br /> Sulfate 37 184 38 45 47 62 41 48 <br /> Total Dissolved Solids 560 800 1100 1300 500 600 440 575 <br /> All concentrations are provided in mg/L. <br /> CLGB-Concentration Limit Greater Than Background(Impact Constituents only). See Table 5-12 of Revised Post-Closure Maintenance Plan(11/2/94). <br /> UTL-Upper Tolerance Limit. See Table 5-15 of Revised Post-Closure Maintenance Plan(11/2/94). <br /> BL-Background Limit Determined from historical data at MW-20 and MW-23R. (Mean+[2.375 x Standard DeviationD <br /> PQL-Practical Quantitation Limit from current laboratory report <br /> 647-May 2006 concentration exceeds the CLGB,UTL,BL,or PQL. <br /> Page 1 of ):1(ERST & ASSOCIATES, INC. <br />