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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-2 <br /> Units:mg/l,unless noted <br /> ample Designation -2 -2 <br /> Sampling Date 7/10/89 1/19/90 4/4/90 7/13/90 10/1/90 1/7/91 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 10/4/93 <br /> Monitoring and Field Parameters <br /> General Water Quailly Parameters <br /> Temperature(°C)(field) NR NR NR NR NR NR NR NR NR NR NR NR NP NR NR NR NR <br /> Chloride 5 6 7.1 6.9 6.1 6.5 6.6 7 6.7 NR 11 6 6 6 6 6 6 <br /> urate- itro en .81 3 3 2.8 3.2 NR NR N -NR- 3.0 2.8 3.0 3.0 3.1 3.0 2.9 2.9 <br /> Total Dissolved oli s 140 152 158 188 169 157 140 200 156 220 170 200 170 200 180 170 180 <br /> Sulfate <5 1.5 1.4 1.5 1.3 1.4 1.4 1.4 1.4 <8 <8 <5 <5 <5 <5 <5 <5 <br /> pH(std.units (field) 8.00 7.50 NR N NR NR NR --N-R----WV 7.67 7.25 7.25 7.82 7.47 7.64 7.48 7.10 <br /> Electrical Conductivity umhos/cm 219 256 NR NR NR NR NR NR NR 247 203 230 260 232 226 248 198 <br /> Turbidity(NTU)(field) NR NR NR----NR NR NR NR NR NR NR NR NR NR NR N R R <br /> alcium <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Volatile Or anic Com ounds u n <br /> Trichloroethene(TCE) <br /> 1,1-Dichloroethene <br /> Chloroform <br /> Benzene <br /> m/p-Xylene <br /> hioro enzene <br /> Methylene Chloride <br /> cetone <br /> Napthalene <br /> Meth ter-butyl ether <br /> --Toluene <br /> 1,4-Dichlorobenzene <br /> etrach oroet ene <br /> - utanone <br /> 1,3-Dichloropropane <br /> h oromet ane <br /> 1,2,4- nmeth benzene <br /> 1,3,5-Trimethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080 <br /> All Compounds NR NR NR NR NR NR NR NR NR 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 /> MW-2(abandoned);Printed: 1/30/2004 9 of 28 <br />