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GROUNDWATER <br />FOOTHILL SANITARY LANDFILL, <br />Unita: mg/1, unless noted <br />Sample Designation MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 MW -3 <br />Sampling Date 1/16/95 4/20/95 7/6/95 10/11/95 1/4196 4/2/96 7/9/96 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 />Temperature (°C) (field) <br />18.1 <br />14 <br />21.5 <br />22.5 <br />18.4 <br />20.8 <br />22.5 <br />21.3 <br />17.1 <br />25.3 <br />24 <br />22.2 <br />20.17 <br />21.8 <br />23.9 <br />20.6 <br />17.7 <br />19.3 <br />24.6 <br />21.5 <br />Chloride <br />10 <br />7.1 <br />9 <br />9 <br />9 <br />9 <br />9 <br />9 <br />7.3 <br />7.5 <br />7 <br />8.7 <br />11 <br />11 <br />10 <br />10 <br />10.2 <br />13 <br />7.1 <br />9.61 <br />Nitrate -Nitrogen <br />3.6 <br />3.1 <br />3.7 <br />3.5 <br />3.3 <br />3.9 <br />3.3 <br />4.1 <br />3 <br />3.6 <br />2.6 <br />3.3 <br />3.9 <br />4.2 <br />4.2 <br />4.2 <br />0.23 <br />4.1 <br />2.9 <br />3.5 <br />Total Dissolved Solids <br />230 <br />180 <br />179 <br />260 <br />250 <br />250 <br />230 <br />230 <br />230 <br />178 <br />220 <br />246 <br />216 <br />215 <br />229 <br />198 <br />173 <br />179 <br />213 <br />220 <br />Sulfate <br />(28] <br />2.3 <br />5 <br />6 <br />6 <br />5 <br />6 <br />6 <br />4.9 <br />4.5 <br />5 <br />5.5 <br />6 <br />6.1 <br />6.2 <br />6 <br />6.8 <br />5.1 <br />1.9 <br />6.57 <br />PH (std units) (field) <br />7.74 <br />7.19 <br />7.80 <br />7.62 <br />7.81 <br />7.48 <br />7.49 <br />7.34 <br />8.68 <br />7 <br />7.08 <br />7.8 <br />7.81 <br />7.72 <br />8.18 <br />7.5 <br />8.28 <br />7.77 <br />7.41 <br />7.9 <br />Electrical Conductivity (umhos/cm) (field) <br />304 <br />284 <br />295 <br />286 <br />294 <br />277 <br />289 <br />275 <br />460 <br />238 <br />266 <br />267 <br />242 <br />277.3 <br />271 <br />264 <br />272 <br />268 <br />271 <br />270 <br />Turbidity (NM (field) <br />100.6 <br />10.7 <br />136 <br />68 <br />42 <br />120.3 <br />58.0 <br />65.1 <br />2.3 <br />2.1 <br />1.98 <br />19.38 <br />0.8 <br />18.7 <br />2.5 <br />15.1 LOW <br />1.3 <br />1.01 <br />>200 <br />Potassium <br />Magnesium <br />Sodium <br />Volatile Organic Compounds (MM <br />Trichloroethene (TCE) <br />09 <0.43 <0.4 <0.4 0.5* <0.4 <0.4 0.7* <0.5 0.86 <0.4 <0A9 <0.89 <0.89 <0.89 <0.89 4.0 <br /><0.89 <br /><0.89 <br /><0.06 <br />I,1-Dichloroethene <br /><0.4 <0.4 <0.4 0.29* <0.4 <0.72 <0.72 <0.72 <0.72 <0.72 4.0 <br /><0.72 <br /><0.72 <br /><0.04 <br />Chloroform <br /><0.83 <0.83 <0.83 <0.83 2.6* <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <br /><0.83 <br /><o.83 <br /><0.06 <br />Benzene <br />4.2 <br /><1.0 <br /><1.0 <br /><0.04 <br />m/P-Xyleae <br />1S* <br />W,78 <br /><0.78 <br /><0.21 <br />Chlorobenzene <br />4.0 <br /><0.90 <br /><0.07 <br />Methylene Chloride <br /><0.03 <br />Acetone <br />Napthalene <br />Metbyl ter -butyl ether <br />Toluene <br />4.1 <br />1,4 -Dichlorobenzene <br />Tetrachloroethene <br />2-Butanone <br />1,3-Dichloropropane <br />Chloromet}ume <br />Chloroethane <br />Carbon disulfide <br />Constituents of Concern Parameters <br />Sgobivolatie Organic Compounds (EPA Method 3520/8270) <br />Bis(2-etbylhexyl)phthalate <br />All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR ND <br />Organochlorine Pesticides and Polvchlormated BiphenvPs <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 NR ND <br />* = Trace Concentration <br />(1) This analytical result appears to be anomalous and therefore was no 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 />n:\consulting\data\shared\projemWs\gmr\79\7912891I7i011207g1 <br />