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l Total Xylene 24 mg/kg <br /> 2 Total Volatile Organic Compounds 64 mg/kg <br /> i I <br /> J <br /> 41 2 . 3 . 2 . Ground Water. <br /> i <br /> 51 Ground Water <br /> 6 Constituent Concentration <br /> I <br /> 71 Arsenic 39 ug/L I <br /> 8 Benzene 1, 800 ug/L <br /> 9 Chlorobenzene 12 ug/L <br /> 10 Ethylbenzene 220 ug/L <br /> 11 Total Xylenes 620 ug/L <br /> 12 Naphthalene 27 ug/L <br /> 131 Acenaphthene 18 ug/L <br /> 14 <br /> 15 2 . 3 . 3 . The preliminary remedial investigation was performed byl <br /> 16 PG&E to evaluate the existence of manufactured gas plant residues in <br /> 17soiland ground water. The results submitted to the Department by <br /> 18Iconfirm the existence of hazardous substances on-site. Given <br /> PG&E i <br /> 19 ! these results, the Site has been listed on the Department's Annual <br /> 20 Workplan which identifies hazardous waste sites scheduled for <br /> 21 investigation and cleanup activities in the State of California. <br /> 22 2 . 4 . Health Risks and Hazard Characterization. <br /> i <br /> 23 �i 2 . 4 . 1 PNA Compounds. Some of the PNA compounds found at the <br /> i <br /> 241 Site are probable human carcinogens, and can cause tumors both at <br /> 25 the site of application and systemically. Those PNAs found onsite ) <br /> 26 � thus far which are considered carcinogenic by the Department are <br /> 27 Benzo (a) anthracene, Benzo (k) flouranthene, Benzo (a) pyrene, <br /> I <br /> PAPER 7 <br /> _CALIFORNIA <br /> 3 "REV. b•72" <br /> it <br />