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Enclosure 4 <br /> VOLATILE ORGANIC CONTAMINANTS FOUND IN GROUND WATER AT CLASS III LANDFILLS <br /> METHOD DETECTION LIMITS by U. S. EPA METHOD (in ) <br /> WATER QUALITY 601 602 624 8260 <br /> CONTAMINANT LIMIT ( ) 502.1 502.2 503.1 524.1 524.2 (8010) (8020) (8240) wide narrow <br /> Benzene _0.009 0.02 0.21 0.04 0.2 .4 0.04 0.03 <br /> Bromodichloromethane _ _ 0.27;0.6 (2;41 0.002 _0.02 0.29 0.08 0.10 F.T. .2 0.08 0.03 <br /> Carbon tetrachloride 0.5 (11 0.003 0.01 _ _ 0.28 0.21 0.12_ _ 0.21 0.02 <br /> Chi orobenzene _ 30 (11 0.001 0.003 T 0.004 0.14 0.04 0.25 0.2 6.0 6A4 0.03 <br /> Chloromethane _ _ _3 (51 0.01 0.03 0.13 0.08 0.13 0.02 <br /> 1,2-Dichlorobenzene 10 _ _[31 0.02 0.02 1.0 0.03 0.15 0.4 0.03 0.05 <br /> 1,3-Dichlorobenzene . 20 (3] 0.02 0.006 0.12 0.32 0.4 0.12 0.05 <br /> 1,4-Dichlorobenzene _ _ 5;0.9 _ (1;21 0.007 0.006 Ji 0.03 0.24 0.3 0.03 0.04 <br /> Dichlorodifluoromethane 1000 `[51 0.05 0.10 1.81 0.10 0.11 <br /> 1,1-Dichloroethane 5 (1] 0.002 0.07 0.17 0.04 0.07 4.7 0.04 0.03 <br /> 1,2-Dichloroethane 0.5 (11 0.002 0.03 0.35 0.06 0.03 0.06 0.02 <br /> 1,1-Dichloroethleve 6;0.06 (1;41 0.003 0.05 <br /> cis-1,2-Dichloroeth leve 6 [11 0.002 0.01 0.12 0.12 0.06 <br /> trans-1,2-Dichloroeth lene 10 [11 0.002 0.06 1.7 0.06 0.10 1.6 0.06 0.03 <br /> 1,2-Dichloropropane 5;0.5 [1;41 0.006 0.17 0.04 0.04 0.04 0.02 <br /> Ethl benzene 29 (7] 0.005 0.002 0.06 0.2 7.2 0.06 0.03 <br /> Methylene chloride 5 [6, 41 0.02 0.25 0.03 0.25 2.8 0.03 0.09 <br /> 1,1,2,2-Tetrachloroethane 1 [11 0.01 0.01 0.41 0.04 0.03 MOU 0.04 0.20_ <br /> Tetrachloroethylene _ 5;0.7 11;41 0.001 0.04 0.01 0.29 0.14 0.03 0.14 0.05 <br /> Toluene 42 (71 0.01 0.02 0.12 0.11 _ 0.2 6.0 " 0.11 0.08 <br /> 1,1,1-Trichloroethane _ 200_ (11 0.003 0.03 0.26 0.08 0.03 3.8 0.08 0.04 <br /> Trichloroethylene 5;3 (1;41 0.001 0.01 0.01 0.36 0.19 0.12 1.9 0.19 0.02 <br /> Vinyl chloride 0.5;0.015 I1;4] 0.006 y 7 1 t;017 ;, 0.04 <br /> y - 02 0 1; 0.1! O.iB ? <br /> Xylene(s) 17 [71 1 0.02 0.004 0.2 0.13 0.130.06 <br /> Note: Method detection limits in shaded boxes exceed the most limiting water quality limits. <br /> References: (11 Statc of California Primary Drinking Water Standard (MCL). <br /> [21 Cal/EPA 1-in-a-million incremental cancer risk estimiate. <br /> [31 Calif. Department of Health Services "Action Level" in drinking water (taste & odor based). <br /> (41 U. S. EPA 1-in-a-million incremental cancer risk estimiate. <br /> (51 U. S. EPA Health Advisory. <br /> (61 U. S. EPA Primary Drinking Water Standard (MCL). <br /> (71 U. S. EPA Taste & Odor Threshold (54 Federal Register, No. 97, pp. 22138, 22139). <br /> J% August 1993 <br />