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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 <br /> Sampling Date 7/7/98 10/9/98 1/15/99 4/1/99 7/7/99 10/20/99 3/8/00 5/11/00 7/13/00 10/9/00 1/15/01 4/30/01 8/2/01 10/29/01 2/6/02 4/30/02 8/1/02 <br /> Monitoring and Field Parameters <br /> General Wateruali Parameters <br /> em erature (field) 22.7 20.8 18 20.8 20.1 21.3 18.2 23.3 20.5 19.8 17.8 20.0 20.4 19.2 16.6 18.6 .7 <br /> h onde 6.5 6.4 0.23 8.2 6.7 6.09 6.79 6.74 6.03 4.29 6.55 6.23 5.8 7 7.3 6.4 .4 <br /> urate-Nitrogen 1 .8 .3 2.6 .44 7 2.51 2.28 3.65 2.7 2.31 2.5 3 .8 2.9 <br /> ota issolve olds 202 176 162 165 182 187 180 194 186 184 183 219 180 160 170 190 170 <br /> Sulfate 6. 6.5 6.5 5.9 6.3 7. 7.6 7.55 .48 <0.021 7.0 6.7 6.7 7 7.6 5.2 5. <br /> pH std units)(field) 8.22 6.93 8.37 7.08 7.77 8.06 7.37 7.52 8.5 6.61 7.41 6.92 8.09 6.29 6.91 6.79 7.02 <br /> Electrical Conductiv umhos cm 237 51 243 236 237 237 242 240 240 2 710 22 40 100 80 <br /> P1 �e LOW 3 1.43 1.23 1 4.02 0. 0.27 2.51 2.4 10 11. 6.7 7.1 3.4 <br /> um <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Voatile Organic Compounds u / <br /> h <br /> oroetcene <br /> (;E) <0.89 <0.89 <0.89 <0.8 < <0.06 <0.06 <0. 6 <0. < <0.06 <0.06 <0.06 <0.06 <0.18 <0.06 < .06 <br /> is oroet ene <0.72 < <0.7 <0.72 <0.72 <0.04 <0.04 <0.05 <0. <0.06 <0.06 <0,06 < <0.06 <0.12 <0.06 <0.0 <br /> Chloroform <0.83 <0. <0.8 <0.83 <0.83 <0.06 <0.07 0.162" <0.07 <0. <0.07 <0.07 < .07 <0. <0.18 <0.07 <0.07 <br /> Benzene <1.0 < <1.0 <0.0 <0.05 <0.0 <0.0 <0,05 <0. <0.05 <0.05 <0.05 <0.14 <0.05 < .0 <br /> m - ene < <U-.78 <0.78 < .21 <0. <0.21 < <0.21 <0.21 <0.21 <0.21 <0.21 <0.24 <0.21 <0.2 <br /> hlor0 enzene 2.6 <0.07 <0.07 <0.07 <0.07 <0.0 <0.0 <0.07 <0.07 <0.07 < <0. < .0 <br /> Methylene Chloride <0.03 0.044 <0.03 <0.06 <0.06 <0. 6 <0.06 <0. <0.06 2.4 .15 Z6. 6 <br /> Acetone 2.61 <1.79 <1.7 <1.79 <1.7 <1. <1. <1.8 <br /> QW- <br /> Napthalene <0.1 <0. <0.1 <0.1 <0.1 <0.1 <0.46 <0.10 <0.10 <br /> _Methyl ter- uty ether 0.0859 <0.08 <0.08 <0.1 <0.09 <0.08 <br /> Toluene 0.178 <0.07 <0.07 <0.16 <0.07 <0.07 <br /> 1,4-Dichlorobenzene <0.11 <0.11 <0.23 <0.11 <0.11 <br /> etrac oroethene <0.08 < .0 <0.22 <0.08 <0. 8 <br /> 2- utanone <br /> <0.65 < .7 <010 <br /> 1,3-6c oro ro ane <br /> <0. <0.0 <0.09 <br /> oromet ane <0.14 <0.1 <br /> 2, - nmet enzene <br /> 1 met yl enzene <br /> Constituents of Concern.Parameters <br /> Semivolatile Organic Compounds <br /> EPA Method 3520/8270 <br /> I ompounds NR NR NR NR NR NO NR NR NR NR NR NR NR NR NR N <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> EPA Method 3510/8080 <br /> All Compounds NR NR NR NR NR ND NR NR NR NR NR NR NR NR NR N <br /> = race 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:1/30/2004 5 of 28 <br />