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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> LWA <br /> Units:m n,unless noted <br /> amp a Uesignation - -1 LW-1 - - LW-1[W1 [W-1 LWA - - -1 -1 - - -1 - - <br /> Sampling Date 7/10/89 10/20/89 1/17/90 4/4/90 7/12/90 10/2/90 1/7191 4/2/91 7/19/91 10/9/91 1/10/92 4/3/92 7/1/92 10/2/92 1/5/93 4/1/93 7/1/93 <br /> Monitorina and Field Parameters <br /> General Water Quali Parameters <br /> Temperature(°C)(field) NIR N R NR NR NR R N R NR NR NR NR NR NR NR JR NR NR <br /> Chloride 9 11 10.3 10.2 9.6 8.3 8.9 9 9.5 9.3 NR 10 8 8 9 8 8 <br /> Nitrate-Nitrogen 0.34 1. 1.3 1.3 1.2 1.2 NR NR N NR 1 1.1 1.1 1.2 1.2 1.2 1.1 <br /> Total Dissolved Solids 175 155 150 196 106 194 179 198 164 192 250 210 220 220 240 200 210 <br /> Sulfate 13 14 14.8 14.6 14.5 13.9 11.5 14.6 14.3 14.4 15 18 14 14 14 14 14 <br /> pH(std.units)(field) 8.00 NR NR NR NR NR NR NR NR NR 7 66 7.69 7.64 6.86 6.47 7.37-6.5o <br /> Electrical conductivity(umhos/cm 279 N NR NR NR NR NR NR NR 289 272 306 329 281 317 315 <br /> urbi ity U eld) N NR R N NR N N NR N NR NR N NR NR NR NR <br /> Calcium <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Volatile Organic ComDOunds(ug/1) <br /> Trichloroethene( E) <br /> 1,1-L)Ichloroethene <br /> Chloroform <br /> Benzene <br /> m/p- ene <br /> hnvrwcnZei�c <br /> Methylene Chloride <br /> Acetone <br /> Napthalene <br /> Methyl ter butyl ether <br /> Toluene <br /> 1,4--Dichlorobenzene <br /> etrac loroethene <br /> - utanone <br /> 1,3-Dichloropropane <br /> Chloromethane <br /> 1, ,4- rimethyibenzene <br /> 1,3,5-Tdmethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Corn oun s NR NR NR NR NR NR NR NR NR R R NR NR NR NR NR R <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All compounds NR NR NR NR NR NR NR NR R NR NR NR NR NR 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 /> LW-1:Printed:1/30/2004 25 of 28 <br />