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Organic Concentration Limits vs.Fourth Quarter 2009 Sampling Event Results <br /> Forward Landfill <br /> MW-1 MW-2A MW-3 MW-10 <br /> Parameter MDL Nov-09 CLGB BL PQL Nov-09 CLGB BL PQL Nov-09 CLGB BL PQL Nov-09 CLGB BL PQL <br /> 1,1,1,2-Tetrachloroethane 0.11 <0.� 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,1,1-Trichloroethane 0.081 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,1,2,2-T etrachlorcethane 0.14 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> pt,fa <br /> 1,2,3-Trichloro <br /> propane 0.30 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,2,4-Trichlorobenzene 0.17 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,2-Dibromo-3-Chloropropane 0.44 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 2-Hexanone 3.4 <10 10' <10 10' <10 10' <10 10' <br /> 4-Methyl-2-Pentanone 2.1 <10 10' <10 10' <10 10' <10 10' <br /> Acetone 4.6 <10 10' <10 10' <10 10' <10 10' <br /> Bromodiichloromethene 0.12 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Bromoform 0.23 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Carbon Disulfide 0.35 <1.0 1.0' <1.0 1.0' <1.0 1.0' <1.0 1.0' <br /> Chloroform 0.072 <0.500.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> cis-1,2-Dichloroethylene 0.11 <0.50 0.50 <0.50 1.5 <0.50 0.50 <0.50 0.50 <br /> cis-1,3-Dichloropropene 0.098 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> s <br /> Ethanol 45 <250 250' <250 250' <250 250' <250 250' <br /> Ethylbenzene 0.12 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Ethyltertiary Butyl Ether 0.18 <0.50 0.50' <0.50 0.50' <0.50 0.50' <0.50 0.50' <br /> 1011,111''I PERU <br /> Methyl Bromide 0.20 <1.0 1.0' <1.0 1.0' <1.0 1.0' <1.0 1.0' <br /> Methyl Chloride 0.11 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> All concentrations are provided in ug/L. <br /> MDL-Method Detection Limit from current laboratory analytical report. <br /> CLGB-Concentration Limit Greater Than Background(Impact Constituents only). See Table 5-12 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 Deviation]) <br /> PQL-Practical Quantitation Limit from current laboratory report. <br /> 0.75-November 2009 concentration exceeds the CLGB,BL,or PQL. <br /> No historical detections above the PQL in MW-20 or MW-23R. Background limit is equal to the PQL. <br /> '-Constituent concentration is between the MDL and PQL. <br /> Page 1 of 8 <br /> ERST & ASSOCIATES, INC:' <br />