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Organic Concentration Limits vs. First Quarter 2009 Sampling Event Results <br /> Forward Landfill <br /> MW-1 MW-2A MW-3 MW-10 <br /> Parameter MDL Feb-09 CLGB BL PQL Feb-09 CLGBI BL PQL Feb-09 CLGB SL PQL Feb-09 CLGB BL PQL <br /> 1,1,1,2-Tetrachloroethane 0.14 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,1,1-Trichloroethane 0.18 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,1,2,2-Tetrachloroethane 0.28 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> W�... _., �� .v. .�� �,�w1 1 .. W,ati,y�a c,ti . <br /> 1,2,3-Trichloropropane 0.43 <1.0 LO <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,2,4-Trichlorobenzene 0.31 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 1,2-Dibromo-3-Chloropropane 0.46 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1 1.0 <br /> -8 <br /> IN 9 1195 M s,� m .. '.., poll " <br /> i�.i <br /> 2-Hexanone 2.5 <10 10*� <10 10* <10 X10* <10 10* <br /> 4-Methyl-2-Pentanone 3.4 <10 10* <10 10* <10 10* <10 10* <br /> Acetone 7.4 <10 10* <10 10* <10 10* <10 10* <br /> st <br /> Bromodichloromethane 0.30 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Bromoform 0.24 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Carbon Disulfide 0.40 <1.0 1.0* <1.0 1.0* <1.0 1.0* <1.0 1.0* <br /> N 4 <br /> Chloroform 0.23 <0.50 0.50 <0.50 0..50 <0.50 0.50 <0.50 0.50 <br /> cis-1,2-Dichloroethylene 0.32 <0.50 0.50 <0.50 1.5 <0.50 0.50 <0.50 0.50 <br /> cis-1,3-Dichloropropene 0.19 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> 4. <br /> 01, <br /> Ethanol 57 <250 250* <250 250* <250 250* <250 250* <br /> Dhylbenzene 0.16 <0.50 0.50 <0.50 0.50 <0.50 0.50 <0.50 0.50 <br /> Rhyltertiary Butyl Ether 0.22 <0.50 0.50* <0.50 0.50* <0.50 0.50* <0.50 0.50* <br /> Methyl Bromide 0.21 <1.0 1.0* <1.0 1.0* 0.0 1.0* <1.0„ 1.0* <br /> Methyl Chloride 0.20 <0.50 0.50 <0.50 0.50 <0.50 0.50 0.45** 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 /> NS-Constituent not analyzed this event. <br /> 0.75-February 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 /> t-No historical detections above the PQL in MW-20 or MW-23R. Constituent not analyzed this event. Background limit will be equal to the PQL when constituent is <br /> analyzed. <br /> Pao 8 <br /> E�RST &WATES, INC <br />