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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-1 <br /> Units:mg/l,unless noted <br /> Sample Designation MW-1 MW-1 MW-1 <br /> Sampling Date 10/14/02 1/29/03 5/30/03 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Chloride 9.2 6.7 NM <br /> -14i 3.2 NM <br /> Total Dissolved Solids 360 180 NM <br /> Sulfate 5.8 6.5 NM <br /> __pH(std.units)(field) 7.81 <br /> Electrical Conductivity(umhos/cm 250 319 234 <br /> Turbidyi (NTU)(field) 6.9 2.9 0.7 ------- <br /> Tempe�ratyre ielo) 20.4 16 _23,8 ------- <br /> Cakium NM 19 <br /> Potassium NM 3.3 <br /> Sodium NM 11 <br /> Magnesium NM 9.8 <br /> Volatile Organic ComRqgrj�q� u ---- ------ <br /> Methylene Chloride <0.3 <0.23 NM <br /> Trichloroethene(TCE) <0.2 <0.36 NM <br /> 1,1-Dichloroethene <0.2 <0.24 NM <br /> Chloroform <0.3 <0.37 NM <br /> Chlorobenzene <0.2 <0.32 NM <br /> 'Acetone <2.0 (2.5) NM <br /> Napthalene <0.3 <0.93 NM <br /> Methyl tert-butyl ether 5.3 <0.36 NM <br /> Toluene <0.2 <0.32 NM <br /> 1,4-Dichlorobenzene <0.2 <0.46 NM <br /> Tetrachloroethene <0.3 <044 NM <br /> 2-Butanone <2.0 <0.14 NM <br /> 1,3-Dichloropropane <0.2 <0.40 NM <br /> Chloromethane <0.3 <0.18 NM <br /> 1,2,4-Trimethylbenzene NM <br /> 1,3,5-Trimethylbenzene NM <br /> Constituents of Concern Parameters <br /> Sernivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds . NR NR NR <br /> --- <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR NR <br /> =Trace Concentration <br /> [1]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 /> MW-1;Printed:7/8/03 7 of 24 <br />