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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 - -1 <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 /> Monitorind and Field Parameters <br /> QgnerAl Water Quility Parameters <br /> emperature (field) 22.7 14.4 18 20.8 20.1 21.3 18.2 23.3 20.5 20.4 19.2 16,6 18.6 20.7 <br /> Chloride 6.5 11 0.23 .2 9 6.74 6.03 4.29 6.55 6.23 5.8 7 7.3 6.4 6.4 <br /> ttrate- itr en 12 2.3 .6 .4 2.51 .2 3.6 2.7 3 2. <br /> ota isso ve Solids 202 210 162 165 182 187 180 194 186 184 183 219160 170 190 <br /> 1 0 <br /> Sulfate . 5.9 6.3 7.43 7.6 7.5 <0.021 7.02 6.73 6.7 7 7.6 5.2 5. <br /> p (std.units (field) 2 7 7.08 7.77 8.06 7.37 7.52 8.5 6.61 7.41 6.92 8.09 6.29 6.91 6.7 0 <br /> Electrical ConductiVy(u-hosTm) 237�207 243 235-26-237 237 242 240 240 264 710 220 400 100 280 -270 <br /> Turb dm IF T )(veld) .7 .2�5'�43 1.2 .0�0. 7 2.51 12.4 10 11.7 .7 7.1 4 <br /> a cw <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Volatile Organic gompoynds u /1 <br /> Trach oroethene(ICE) <0.89 <0.8 <0.89 <0.89 <0-$9 <0.0 <0.06 < < < < <0.06 <0.06 <0.06 <0.18 <0.06 < <br /> 1. -Dic loroet ene < <0.72 <0.72 <0.720.7 <0.04 <0.04 <0. <0.06 <0.06 <0.06 <0.06 <0.00 <0.06 <0.12 <0.06 <0. 6 <br /> -Zfforo orm <0.83 < <0.8 <0.83 <0.83 <0.06 <0.07 <0.0 <0.07 <0.0 <0.07 < <0.07 <0.18 <0.07 <0. 7 <br /> enzene < <1.0 <1.0 <0.0 <0.05 <0.04 <0.0 <0.05 <0.05 <0.05 <0.05 < . 5 <0.14 <0.05 <0.05 <br /> m_ p- yene <0.7 <0.78 <0.78 < <0.21 < <0.21 <0. 1 <0.21 < .21 <0.2 <0.21 <0.24 < <0.21 <br /> !oro enzene 2.6 <0.07 <0.07 <0.07 <0.0 0 0 <0.07 <0.07 <0.07 <0.07 <0.16< .0 <0.07 <br /> etylene Chloride < < , < , <0.06 < .0 < .0 < .0 <0.0 {2. ) (0.151:- < .06 <br /> cetone 2. <1.79 <1.79 <1.79 <1.79 <1.8 <1.8 (5.31 <1.8 {3 ) <br /> Napthalene <0.1 <0.1 <0.1 <0.1 < <0.i < , <0.10 <0.10 <br /> Methyl tent-butyltert-butyl ether 0.0859* <0. <0.08 <0.18 <0.08 <0,08 <br /> Toluene 78* <0.0 <0.07 <0.16 <0.07 <0.07 <br /> is oro enzene <0.11 <0.11 <0.23 <0.11 <0.1 <br /> 1,4-Dichlorobenzene <br /> trac oroet ene <0.08 <0.08 <0. <0.08 <0.0 <br /> - utanone .9 <0.65 <0.70 < . <br /> 1, - is oropropane <0.20 0.42* -0. <br /> oromet ane <0.14 < 4 <br /> - nmethy benzene <br /> 1,3,5-fnmethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR NR -NO NR NR NR NR NR NR NR N <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) <br /> All ompoun s N N NR NRNR 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 /> NO=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> MW-1;Printed:7/26/2004 5 of 28 <br />