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® ® MTORMIMMANKNAL)WRESULM GROUNDWATER FOOTHILL SANITARY LANDFILL Units:tng/l,unless noted Sample Designation MW-2R MW-2R MW 2R MW-2R MW-2R MW-2R MW-2R MW-2R MW-2R MW-2R Sampling Date 8/13/03 1/21/04 7/21/04 3/2/05 7/27/05 5/15/06 7/27/06 1/31/07 7/'33/07 2/6/08 Monitoring and Field Parameters General Water Ouality Parameters Temperature(°C)(field) _ - 21.9 14.__ 2 20.7 ' __. - _..... _4.8 18.8 _0.7 19.7 _1.5 175 2_ _1.6 17.6 Chloride 6.7 7.1 6.7 ? 6 5 6 62 5.6 5.58 Nitrate-Nitrogen 3.1 3.1 2.9 2,6 2.8 2.5 2.3 2.7 2.5 2.64 - _--- Total Dissolved Solids 150 180 170 150 160 197 193 160 160 190 --- - Sulfate 2.4 2.3 1.8 2 2'" t.7 3 2.1 1.7 1.87 pH(std.units)(field) 6.58 7.19 724 7.14 _737 7.08 7.38 7.58 7.1 7.51 -- - __ Electrical Conductivity(umhos/cm)(field) 203 284 207 221 243 416 368 205 194 254 -- - _- --- _...__ ---- -------_--- -- - --------------- -------- --_.. _ _ _.. Turbidity(NTU)(field) - - - 5.2 10.7 --3.74 9.8 1 16 11.6 9.6 17.1 8.41 8.1 - - --- -- - -- - -- Calcium - 15 15 16 17.9 17.6 17.5 15 16 21 - - - - Potassium - 1.4 ---2.4 2.8 4.1 8.1 8.6 7.9 7.6 3.1 3.6 -- _- - - -- Magnesium - - - _ 8.6 T6 7.6 7.7 4.1 42 3.9 3.3 7.9 12.0 -- _---- Sodium I? Il 11 13.3 12.2 13.7 13.3 13 11 16 Volatile Oceanic Compounds(ug/h Trichloroethene(TCE) <0.36 <0.3G <0.36 <0.13 <0.13 <O.13 <0.13 <0.13 <0.13 <0.31 - - -- -- 1 I-Dichloroethene <0.24 <024 <0.24 <0.39 <0.39 <0.39 <0.39 <0.39 <0.39 <0.43 - - -- - Chloroform <0.37 <0.37 <0.37 <02p <0.20 <020 <020 <0.20 <0.20 <0.33 - - Benzene <0.28 <0.28 <0.28 <0.17 <0I7 <0.17 <0.17 <0.17 <0.17 <0.30 - - m/p-Xylene <0.38 <0.38 <0.38 NR NR NR NR NR NR NR - - -- Chlorobenzene <0.32 <032 <0.32 <0.16 <0.16 <0.16 <0.16 <0.16 <0.16 <0.36 - Methylene Chloride <0.23 <0.23 <0.23 <0.48 <0.48 <0.48 <0.48 <0.48 <0.48 <0.30 -- -- Acetone (0.90'") <052 <0.52 {3.7"} <L$ <1.8 <1.8 4.5W 14 <2.7 - Napthalene <0.93 <0.93 <0.93 <024 <0.24 <024 <0.24 <024 <024 <0.29 _- -- - - - Methyl tet butyl ether - <0.36 <0.36 -.<0.36 <032 <0.32 <0.32 <0.32 <0.32 <0.32 <0.70 _---- -- - - - -- --- Toluene <0.32 0.32 <0.32 <0,22 <0.22 <0.22 <0.22 <0.22 <0.22 <0.33 1,4-Dichlorobenzene 10.46 10.46 <0.46 <0.14 <0.14 <0.14 <0.14 <0.14 <0.14 <0.34 -- - - Tetrachloroethene <0.44 <0.44 <0.44 <0.19 <0.19 <0.19 <0.19 <0.19 10.19 10.40 - '-Butanone - _- --- - <0.14 <0.14 <0.14 10,92 <092 <0.92 <0.92 <0.92 <0.92 <2.0 --- - - _- - -- - --- - - -- - - 1,3-Dichloropropane 10.40 10.40 10.40 10.12 10.12 10.12 10.1'_ 10.12 10.12 10.32 Chloromethane <0.18 <0.18 _<0.18 {0.28*} <0.25 <0.25 <0.25 <025 <025 <0.41 -- -- - - - --- - Chloroethane 10.2 --<0.2 <02 <02 <0.38 Carbon disulfide _ -- <0.1 I <0.1 I <0.1 I <0.11 <0.86 -- - - -- _ - -- - 12,4-Trimethy]benzene <0.18 <0.18 <0.18 <0.23 <0.23 <0.23 <0.23 <023 <023 <0.29 - - - - 1,3,5-Trimethylbenzene <0.28 <0.28 10.28 <0.20 <0.20 <0.20 <0.20 <0.20 <0.20 <0.32 Constituents of Concern Parameters Semivolatile Organic Compounds (EPA Method 3520/8270) AllCompoundsNR NR ND NR NR NR NR NR NR NR - - - - Orizanochlorine Pesticides and Polychlorinated Biphenvl's (EPA Method 3510/8080) ll Co Am ounds ----ND----NR _ _-- p _ _ NR_- NR NR NR NR NR =Trace Concentration [I]This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. (I}Parameter also detected in one or more quality control blanks ND=Not Detected NM=Not Measured NR=Not Required n:\consulting\data\shared\proj ects\x l s\qmr\79\791289\FH-Hi st.x Is