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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/l, unless noted <br />Sample Designation LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -1 LW -I LW -1 LW -1 LW -1 LW -1 LW -1 LW -I LW -1 LW -1 LW -1 LW -1 <br />Sampling Date 7/10/89 10/20/89 1/17/90 4/4/90 7/12/90 10/2/90 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 1/5/94 7/5/94 <br />Monitoring and Field Parameters <br />'l emperature (�C) (field) NR <br />14 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Chloride 9 <br />7.1 <br />10.3 <br />10.2 <br />9.6 <br />8.3 <br />8.9 <br />9 <br />9.5 <br />9.3 <br />NR <br />10 <br />8 <br />8 <br />9 <br />8 <br />8 <br />8 <br />10 <br />14 <br />Nitrate -Nitrogen [0.341 <br />3.1 <br />1.3 <br />1.3 <br />1.2 <br />1.2 <br />NR <br />NR <br />NR <br />NR <br />1 <br />11 <br />11 <br />1.2 <br />12 <br />12 <br />1.1 <br />11 <br />1.1 <br />11 <br />Total Dissolved Solids 175 <br />180 <br />150 <br />196 <br />106 <br />194 <br />179 <br />198 <br />164 <br />192 <br />250 <br />210 <br />220 <br />220 <br />240 <br />200 <br />210 <br />220 <br />230 <br />240 <br />Sulfate 13 <br />2.3 <br />14.8 <br />14.6 <br />14.5 <br />13.9 <br />11.5 <br />14.6 <br />14.3 <br />14.4 <br />15 <br />18 <br />14 <br />14 <br />14 <br />14 <br />14 <br />14 <br /><8 <br />16 <br />pH (std. units) (field) 8.00 <br />7.19 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />7.66 <br />7.69 <br />764 <br />6.86 <br />6.47 <br />7.37 <br />6.50 <br />6.40 <br />7.42 <br />7.82 <br />Electrical Conductivity (umhos/cm) (field) 279 <br />284 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />289 <br />272 <br />306 <br />329 <br />281 <br />317 <br />315 <br />276 <br />297 <br />300 <br />Turbidity (NTU) (field) NR <br />10.7 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Calcium <br />Potassium <br />Magnesium <br />Sodium <br />Volatile Organic Compounds tug/Il <br />Trichloroethene (TCE) <br />1,1-Dichloroethene <br />Chloroform <br />Benzene <br />m/p-Xylene <br />Chlorobenzene <br />Methylene Chloride <br />Acetone <br />Napthalene <br />Methyl ter -butyl ether <br />Toluene <br />1,4 -Dichlorobenzene <br />Tetrachloroethene <br />2-Butanone <br />1,3-Dichloropropane <br />Chloromethane <br />Chloroethane <br />Carbon disulfide <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 NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Organochlorine Pesticides and Polychlorinated Biohenvl's <br />(EPA Method 3510/8080) <br />All Compounds NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />° = Trace Concentration <br />[ I I 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\projects\xls\gmr\79\791289\FHOI 1207g 1 <br />