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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/l,unless noted <br /> Sample Designation MW-1 MW-1 MW-I MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-] MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 <br /> Sampling Date 11/28/94 4/21/95 7/6/95 1/22/04 1/5/96 4/2/96 719/96 10/2/96 1/16/97 4/10/97 7/10/97 10/3/97 3/11/98 4/30/98 7/7/98 10/9/98 1/15/99 4/1/99 7/7/99 10/20/99 <br /> Monitoring and Field Parameters <br /> General Water Ouality Parameters <br /> Temperature(°C)(field) 13.7 20.2 22.5 21.5 18.6 21.3 22.3 21.8 15.2 24.4 21.5 22 19.5 20.6 22.7 14.4 18 20.8 20.1 21.3 <br /> Chloride - - 6.3 4.9 5 6 6 5 6 6 4.7 4.7 4.7 6.1 8 6.8 6.5 11 0.23 8.2 6.7 6.09 <br /> Nitrate-Nitrogen -- - 2.4 2.6 2.4 2.3 2.1 2.5 2.3 2.9 2.1 2.4 2.3 2.4 3.4 2.8 12 3.8 2.3 2.6 2_ 2.44 <br /> Total Dissolved Solids -- _ 186 200 _160 240 230 230 250 210 225 187 194 216 196 186 202 210 162 165 182 187 <br /> Sulfate - - - - -6_5 4.9 6 7 6 6 6 7 4.9 5.1 4.8 6 6.5 6.6 6.4 7.7 6.5 5.9 6.3 7.43 <br /> pH(std.units)(field) 8.48 7.89 7.81 7.86 7.97 7.35 7.65 7.25 928 7.65 7.83 7.93 7.97 8.03 8.22 7.32 8.37 7.08 7.77 8.06 <br /> Electrical Conductivity(umhos/cm)(field) 287 245 263 269 246 236 257 245 610 153 173 278 224 245 <br /> _____-____- -_ 237 _07 243 235 236 237 <br /> ------------------------------------- <br /> Turbidity(NTU)(field) 36.9 18 34 14 11 20.8 51.9 16.9 227 3.47 2.69 56.5 1 29.6 4 14.7 LOW 3.25 1.43 1.23 <br /> ----------- - <br /> Calcium ---------------- -...------ <br /> Potassium -_-_-_-- <br /> Magnesium -----------_----- <br /> Sodium ----------- <br /> Volatile Organic Compounds(ug/l <br /> Trichloroethene(TCE)- --- <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 <0.06 <br /> 1,1-Dichloroethene _- - - <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.72- <0.72 <0.04 <br /> Chloroform _ <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.06 <br /> Benzene <1.0 <1.0 <1.0 <0.04 <br /> m/p-Xylene _ <0.78 <0.78--- <0.78 <021 <br /> Chlorobenzene ------------------- ---. <br /> 2.6 - <br /> _---<0.03 <br /> Acetone <br /> -- - ----------------- <br /> Napthalene <br /> Methyl ter-butyl ether -- -------- ----- ---__._._. .__.----- <br /> Toluene <br /> ---------- <br /> 1,4-Dichlorobenzene <br /> Tetrachloroethene - <br /> 2-Butanone <br /> 1,3-Dichloropropane <br /> Chloromethane - - - - <br /> Chloroethane <br /> Carbon disulfide -- _ -- <br /> ----------- <br /> 1,2,4-Trimethylbenzene -- - --------- ----------- <br /> 1,3,5-Trimethylbenzene - ------------_----- --- <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds (EPA Method 3520/8270) <br /> All Compounds -- ND NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NO <br /> Organochlorine Pesticides and Polychlorinated Binhenvl's <br /> (EPA Method 3510/8080) <br /> -- --------------..._------_------ --- ------------------ <br /> _All Compounds - - -- ND NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR ND <br /> *=Trace Concentration <br /> [1]This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br /> (I)Parameter also detected in one or more quality control blanks <br /> ND=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> n:\consulting\data\shared\prof ects\xl s\qmr\79\791289\FH-Hist.xls <br />