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�w wr ® r rr w■� a� r r r r r w w ® rr <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> M -1 <br /> Units:mg/I unless noted <br /> Sample Designation MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-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 8/2/0110/29/01 2/6/02 4/30/02 8/1/02o <br /> - <br /> Monitoring and Field Parameters <br /> General Water Qualms Parameters <br /> Chloride 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 6.4 <br /> Nitrate-Nitrogon 12 2.8 2.3 2.6 2 2.44 2.37 2.51 2.28 3.65 2.7 2.31 2.5 2.3 3 2.8 2.9 <br /> Total Dissolved Solids_ 202 _176 162 165 182 187 180 194 186 184 183 219 180 160 _ 170 _190 170 <br /> Sulfate 6.4 6.5 6.5 5.9 6.3 7.43 7.6 7.55 6.48 <0.021 7.02 6.73 6.7 7 7.6 5.2 _ 5.9 <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 Conductivity(umhos%cm 237 251 243 235 236 237 237 242 240 240 264 710 220 400 100 _280 270 <br /> _Turbid (NTP) ild) __ 4 2.9 LOW _3.25 1.43 1.23 1_4.02 0.49 0.27 2.51 12.4 10 11.7 6.7_ 7.1 3.4 <br /> Temperature(°C)(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 20.7 <br /> Calcium <br /> Potassium <br /> Sodium <br /> -Magnesium ------- - - __ <br /> Volatile Organic Compounds(ug/1) <br /> Methylene Chloride <0.03 0.0448* <0.03 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 2.4 0.15* <0.06 <br /> Trichloroethene(TCE) <0.89 <0.89 <0.89 <0.89 <0.89 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.18 <0.06 <0.06 <br /> 1,1-Dichloroethene <0.72 <0.72 <0.72 <0.72 <0.72 <0.04 <0.04 <0.05 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.12 <0.06 <0.06 <br /> Chloroform <0.83 <0.83 <0:83 <0.83 <0.83 <0.06 <0.07 0.162 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.18 <0.07 <0.07 <br /> Chiorobenzene 2.6 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.16 <0.07 <0.07 <br /> Acetone <1.79 <1.79 <1.79 <1.79 <1.8 <1.8 6.8 <1.8 30 <br /> Napthalene <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.46 <0.10 <0.10 <br /> Methyl ter-butyl ether 0.0859* <0.08 <0.08 <0.18 <0.08 <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 /> Tetrachioroethene <0.08 1.9* <0.22 <0.08 <0.08 <br /> 2-Butanone <br /> <0.65 <0.70 <0.70 <br /> 1 3-Dichloropropane <br /> <0.20 <0.09 <0.09 <br /> Chloromethane <0.14 <0.14 <br /> 1 2 4-Trimethylbenzene <br /> 1 3 5-Trimethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 352018270) <br /> All Compounds NR NR NR NR NR ND 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 ND 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-1;Printed:7/8/03 5 of 24 <br />