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Organic Concentration Limits vs.Third Quarter 2010 Sampling Event Results <br /> Forward Landfill <br /> MW-1 MW-2A I MW-3 MW-10 <br /> Parameter MDL Aug-10 CLGB BL PQL Aug-10 CLGBj BL PQLI Aug-10 I CLGB BL I PQL Aug-10 CLGB BL PQL <br /> 1,1,1,2-Tetrachloroethane 0.35 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,1,1-Trichloroethane 0.82 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,1,2,2-Tetrachloroethane 0.21 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1 i,2 Fr1iIREPeU1 � <3 <br /> :� 1L� c4 0 <br /> ar z, (hQ <br /> rs <br /> w,.;a.aY.Su 'u ,Y>l .wWrdS b w 'bX«. `2•.nV:bSYw' Stab ..Waw.,ury <br /> 1,2,3-Trichloropropane 0.89 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,2,4-Trichlorobenzene 0.41 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1,2-Dibromo-3-Chloropropane 0.39 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> 1"4 Rtt1 vathQ 0 <br /> 1 ^41ctt�rRa#latla 514 q � Q Q" 4 t4 4 1 <br /> Rl§ <br /> 2-Hexanone 1.2 <5.0 X5.0' <5.0 5.0* <5.0 X5.0* <5.0 5.0* <br /> 4-Methyl-2-Pentanone 2.1 <5.0 5.0* <5.0 5.0* <5.0 5.0* <5,0 5.0* <br /> Acetone 3.0 <10 10* <10 10* <10 10* <10 10* <br /> �?�XlOnifc 0 3 0:' a i $ x s c5 4 4 oMR <br /> rBjeriz'�(e�0pr�� +� 4';� <br /> ,'S:.��....amu,..w...:�.+w. s..aua ' �£' <br /> Bromodichloromethane 0.39 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> Bromoform 0.26 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> Carbon Disulfide 0.19 <1.0 1.0* <1.0 1.0* <1.0 1.0* <1.0 1.0* <br /> Cardorlcbltylde 0 ) <1t h 4 0 <10 1 Q <10 z f ,�4' 3 1 <br /> z o'; <br /> 40-1 <br /> Chloroform 0.34 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 *1.0 <br /> cis-1,2-Dichloroethylene 0.81 <1.0 1.0 <1.0 1.5 <1.0 1.0 <1.0 1.0 <br /> cis-1,3-Dichloropropene 0.36 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> Dlb[om rpmetkt a c1 k , c c <br /> ,&+. i 4 , "N5M a <br /> .►5� r„ r,. >SII, ei. �10* 121 <br /> Ethanol NA ND NA ND NA ND NA ND NA <br /> Ethylbenzene 0.74 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <br /> Ethyltertiary Butyl Ether 0.29 <1.0 1.0* <1.0 1.0* <1.0 1.0* <1.0 1.0* <br /> �3 <br /> ,., <br /> Methyl Bromide w 0.69 <1.0 1.0* <1.0 1.0* <1.0 1.0* <1.0 1.0* <br /> Methyl Chloride 0.35 <1.0 1.0 <1.0 1.0 <1.0 1.0 <1.0 1.0 <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 /> ND-Ethanol was reported by the laboratory as a tentatively identified compound(TIC). PQL and MDL are not provided in the lab report. <br /> NS-Not sampled.MW-23R reportedly could not be sampled in August 2010 due to insufficient groundwater volume. <br /> 0.75-August 2010 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 /> HERST & ASSOCIATES, INC.- <br />