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wr rr rr rr rr rr ® rr rr rr ® rw ru rr rr <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> NORTH COUNTY SANITARY LANDFn L <br /> Units:mg4,unless noted <br /> Sample Designation G-1 G-1 G-1 G-1 GI G-1 G-1 G-1 <br /> Sampling Date 01/20/04 04/07/04 07/07/04 10/27/04 01/23/05 05/25/05 07/21/05 10/11/05 <br /> Volatile Organic Compounds(Cont.) <br /> 1,1-Dichloroethane <0.22 <0.22 ®.22 <0.22 <D.19 <0.19 <0.19 <0,19- <br /> 1,2-Dichloroethane <0.42 <0.42 <0.42 <0.42 <0.21 <021 <D.21 <0.21 <br /> 1,1-dichloroethene <0.24 <0.24 <0Z4 <0.24 <0.39 <0.39 <D.39 <0.39 <br /> cis-1,2-Dichloroethene <0.31 <0.31 <0.31 <0.31 ®.18 <0.18 <0.19 <0.18 <br /> trans-1,2-dichloroethene <0.26 <0.26 <0.26 <0.26 <0.20 <0.20 <0.20 <0.20 <br /> 1,2-dichloropropane <0.32 <0.32 <0.32 <0.32 <0.16 <D.16 <0.16 <0.16 <br /> 1,3-dichloropropane <0.40 <0.40 <D.40 <0.40 <0.12 <0.12 <D.12 <0.12 <br /> 2,2-dichloropropane <0.38 <0.38 <0.38 <0.38 <D.36 <D.36 ®.36 <0.36 <br /> 1,1-dichloropropene <0.38 <0.38 <0.38 <0.38 <0.21 <0.21 <0.21 <0.21 <br /> Cis-1,3-dichloropropene <0.11 <0.11 *.11 <0.11 <0.15 <0.15 <D.15 <0.15 <br /> trans-1,3-dichloropropene <0.10 <0.10 <0.10 <0.10 <0.22 <0.22 ®.22 <0.22 <br /> Etbylbenzene <0.24 <0.24 <0.24 <0.24 <D.16 <0.16 <D.16 <D.16 <br /> Freon 113 <0.25 <0.25 <0.25 <0.25 NT NT NT NT <br /> Hexachlorobutadiene <0.50 <0.50 <0.50 <0.50 <0.30 <0.30 <0.30 <0.30 <br /> 2-hexanone <0.26 <0.26 <0.26 <0.26 <0.90 <0.90 <0.90 <0.90 <br /> Iodomethane <0.036 <0.036 <0.036 <D.036 <1.6 <1.6 <1.6 <1.6 <br /> Isobutanol <0.61 <0.61 <0.61 <0.61 NT NT NT NT <br /> Isopropylbenzene <0.28 <0.28 <D.28 <0.28 <0.18 <0.18 <0.18 <0.18 <br /> p-isopropyholueoe <0.40 <0.40 <0.40 <0.40 NT NT NT NT <br /> Methacrylonit ile <0.73 <0.73 <0.73 <0.73 NT NT NT NT <br /> Methylene Chloride <0.23 (0.89•) <0.23 <0.23 <0.48 <0.48 ®.48 <0.48 <br /> Methyl methacrylate <0.20 <0.20 W.20 <0.20 NT NT NT NT <br /> 4-methyl-2pentanone <0.17 <0.17 <D.17 <D.17 <0.76 <0.76 <0.76 <0.76 <br /> Methyl tort-butyl ether <0.36 <0.36 <0.36 <0.36 W.32 <D.32 <0.32 <0.32 <br /> Naphthalene <0.93 <0.93 <D.93 <0.93 <0.24 <0.24 ®.24 <0.24 <br /> Propionitrile Q.7 <2.7 <2.7 <2.7 NT NT NT NT <br /> n-propylbenzene <0.37 <0.37 <0.37 <0.37 <0.19 <0.19 <0.19 <0.19 <br /> Styrene <0.33 <0.33 <0.33 <0.33 <0.16 <0.16 <D.16 <0.16 <br /> 1,1,2,2-tetrachloroethane <0.59 <0.59 W.59 <0.59 <020 <0.20 <D.20 <0.20 <br /> 1,1,1,2-tetrachloroethane <0.34 <0.34 <0.34 <0.34 <0.31 <0.31 <0.31 <0.31 <br /> Tetrachloroethene(PCE) <0.44 <0.44 <0.44 <0.44 <0.19 <D.19 <0.19 <0.19 <br /> Toluene <0.32 <0.32 <0.32 <0.32 10.60) <D.22 <0.22 <0.22 <br /> 1,2,3-Trichlorobenzene <0.46 <0.46 <0.46 <0.46 <0.22 <0.22 <0.22 <0.22 <br /> 1,2,4-Trichlombenzene <0.41 <0.41 <D.41 <0.41 <0.19 <0.19 W.19 <0.19 <br /> 1,1,2-trichloroedhme <0.43 <0.43 <D.43 <0A3 <0.18 <0.18 <0.18 <0.18 <br /> 1,1,1-trichloroethane <0.19 <0.19 W.19 <0.19 <0.30 <0.30 <0.30 <0.30 <br /> Trichloroethane <0.36 <0.36 <0.36 <0.36 <0.13 <0.13 <0.13 <0.13 <br /> Trichlorofluoromethane <0.42 <0.42 <0.42 <0.42 <0.33 <0.33 <0.33 <0.33 <br /> 1,2,3-trichloropropane <0.55 <0.55 <0.55 <0.55 <0.19 <0.19 <0.19 <0.19 <br /> 1,3,5-trimethylbenzene <0.28 <0.28 <0.28 <0.28 <0.20 <020 <0.20 <0.20 <br /> 1,2,4-Trunethylbenzene <0.18 <0.18 <0.18 <0.18 <0.23 <0.23 <0.23 <0.23 <br /> vinyl acetate <0.94 <0.94 <0.94 <0.94 <0.62 <0.62 <0.62 <0.62 <br /> Vinyl Chloride <0.16 <0.16 x.16 W.16 ®.37 ®.37 <0.37 <0.37 <br /> m/p Xylene <0.38 <0.38 <0.38 <0.38 NT NT NT NT <br /> o-Xylene <0.15 <0.15 <0.15 <0.15 NT NT NT NT <br /> Total Xylenes <0.48 <0.48 <0.48 <0.48 <0.54 <D.54 <0.54 <0.54 <br /> NR-Not Required <br /> NT=Not Tested <br /> •=Trace Concentration <br /> (1]This data point appears anomalous and therefore was not used for statistical purposes. <br /> (1) Parameter also detected in one or more quality control blanks. <br /> n:\consulting\data)sharedlxls\gmr V 9\791288)NC012405g2 <br />