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® ® MSTORMMMAMNAL W RESIMM <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> Units:mg/l,unless noted <br /> Sample Designation MW-3 MW-3 MW-3 MW-3 <br /> Sampling Date 7/27/06 1/31/07 7/23/07 2/6/08 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature(°C)(field) _---21.5 _---16.8 - <br /> 21.2 17.7 <br /> Chloride 10 11 9.6 9.58 <br /> Nitrate-Nitrogen 3 _ 6 2.9 2.87 <br /> Total Dissolved Solids 229 180 200 140 - - -- <br /> Sulfate 6 6.3 6 6.41 --pH-(Std.units)(field) 7.14 7.34 7.22 732 -_-_-- -- ----------- <br /> Electrical Conductivity(umhos/em)(field) 341 358 258 378 <br /> Turbidity(NTU)(field) -- - -- - 12.7 11.8 11.3 11.3 - -- <br /> Calcium _.. 05.6._. 21 20 16 <br /> Potassium 13.1 11 3.5 3.3 <br /> Magnesium - -- - - - 3.8 5.3 __-- 11 8.1 - <br /> Sodium 17.9 18 16 12 <br /> Volatile Organic Compounds(ue/I) <br /> Trichloroethene(TCE) 0.18* <0.13 0.6 <0.31 - -- <br /> 1,1-Dichloroethene <039 <0.39 <0.39 <0.43 - - - --- ---- <br /> Chlorofonn <0.20 <0.20 <0.20 <0.33 - -- --- - <br /> Benzene <0.17 <0.17 <0.17 <0.30 <br /> m/p-Xylene NR NR NR NR <br /> Chlorobenzene <0.16 <0.16 <0.16 <0.36 <br /> Methylene Chloride <0.48 <0.48 <0.48 <0.30 <br /> Acetone <1.8 _ -. 6*.._. -6.6* <2.7 -. <br /> Napthalene <024 <0.24 <024 <029 <br /> Methyl ter-butyl ether <0.32 <0.32 <0.32 <0.70 <br /> Toluene <0.22 -- <0.22 <0.22 __.<0.32 <br /> 1,4-Dichlorobenzene <0.14 <0.14 <0.14 <0.34 - --- <br /> Teti achloroethene <0.19 <0.19 <0.19 <0.40 - - - ---- <br /> 2-Butanone <0.92 <0.92 - <0.92 Q.0 - <br /> 1,3-Dichloropropane - - - -<0.12 <0.12 <0.12 <0.32 - --- -- <br /> Chloromethane_ <0.25 <0.25 <0.20 <0.41 <br /> Chloroethane <023 <0.23 <0.23 <0.38 <br /> Carbon disulfide <0.23 <0.23 <0.23 <0.86 - <br /> 1,2,4-Trunethylbenzene __ -- -<0.23 -- <0.23 <0.23 <0.29 - ----- - - <br /> 1,3,5-Tr imethylbenzene <020 <0.20 <0.20 <0.32 - - <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds (EPA Method 3520/8270) <br /> Bis(2-ethylhexyl)phthalate NR NR NR NR <br /> All Compounds NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Binhenvl's <br /> (EPA Method 3510/8080) <br /> All Compounds 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 /> (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\prQiects\,x Is\qmr\79\791289\FH-Hist.xls <br />