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MM = <br /> ___ tee__ M _ <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-2 <br /> Units:m /1,unless noted <br /> amp Designation a - - <br /> Sampling Date 8/1/02 10/14/02 1/29/03 5/30/03 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C)(Feld) 20.6 20.6 15.9 20.3 <br /> _Chloride 7.4 8 7.7 7.4 - <br /> _ Nitrate- trogen 3 3 3 4 3.5 3.4 _.__ - __--- -- -- -- - --------- <br /> Total blssolved Solyds-_-_ __- _ ---- 160 - 170- ------- ------ ------ ----- ____ <br /> --Su--lfa-te--- ----- 2.1 ---2.3 2.1 2.2 <br /> pH(std.units)(fie d) 7.16 6.79 6.81 7.7 ------_--_-'-- <br /> Electrical Conductivi (umhos/cm) 260 240 369 201 <br /> Turbidity NTU)(field) 7.1 7.7 3.9 1 <br /> Calcium NM 18 <br /> Potassium NM <0.92 <br /> _Ma nesium NM 7.8 <br /> Sodium NM 9.3 <br /> Volatile Organic Compounds u /1 <br /> Trichloroethene CE 1:0.06 <0.2 <1.36 <0.36 <br /> 1,1-Dichloroethene <0.06 <0.2 <0.24 <0.24 <br /> Chloroform <0.07 <0.3 <0.37 <0.37 <br /> Benzene <br /> <0.5 <0.20 <0.28 <0.28 <br /> m/p-Xylene <0.21 <0.20 <0.38 <0.38 <br /> Chlorobenzene <0.07 <0.2 <0.32 <0.32 <br /> Methylene Chloride <0.06 <0.3 <0.23 <0.23 <br /> Acetone (2.2") <2.0 <0.52 <0.52 <br /> Napthalene <0.10 <0.3 <O.93 <0.93 <br /> Methyl tert butyl ether <0 08 <0.3 <0.36 <0.36 - <br /> Toluene <br /> <0.07 <0.2 <O.32 <0.32 <br /> 1,4-Dichlorobenzene <0.11 <0.2 <0.46 <0.46 <br /> Tetrachloroemene <0.08 <0.3 <0.44 <0.44 <br /> 2-Butanone <0.70 <2.0 <0.14 <0.14 <br /> 1,3-D c loro ro ane <0.09 <0.2 <0.40 <0.40 <br /> oromethane <br /> 1,2,4-Trimethylbenzene 0.69 <br /> 1 3 5 Tnmethylbenzene 0.29' <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR NR NR <br /> Trace Concentration <br /> [11 This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br /> {1)Parameter also detected in one or more quality control blanks <br /> ND=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> 15 of 28 <br /> MW-2(abandoned);Printed:1/30/2004 <br />