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i I standard be changed to a Maximum Contaminant Level Goal (MCLG) 2 of 0. 12 mg/1) . The actual concentrations for total chromium and 3 !I hexavalent chromium were 0. 07 mg/l and 0 . 06 mg/1 , respectively. 4 It has not yet been determined whether the chromium in well #20 5 is attributable to the Respondent's operations. Hexavalent 6chromium salts are irritants when inhaled, ingested or if 7 contacted with the skin. The blood, lungs, liver, kidneys, 8i eyes, and skin are prime targets of hexavalent chromium attack. i 9 Certain water insoluble hexavalent chromium compounds have been 10 determined to be carcinogenic. Hexavalent chromium has also 11 been shown to exhibit carcinogenicity. Chromium III has been 12 implicated in lung cancer cases. Copper and chromium are i 13 essential nutrients in low concentrations. However, at high 14 exposure levels, they are potentially toxic. There is evidence 15 that arsenic is a required trace element for some domestic 16 animals. 17 2 . 5.3 The primary contaminants detected in soils are: arsenic, 18 copper, and chromium. Levels of chromium found ranged from 12 19 to 930 milligrams per kilogram (mg/kg) with background 20 approximated at 30 mg/kg. Levels of copper were found to range 21 from non-detectable (less than 10 mg/kg) to 44 mg/kg. 22 Background for copper has been approximated at 32 mg/kg. For 23 arsenic, background was approximated at 6 mg/kg with levels 24 found ranging from 2 mg/kg (non-detectable) to 17 mg/kg. 25 Exhibit C is an excerpt of the "Soil Assessment Plan Report" 26 dated August 30, 1985 showing results for soil samples taken 27 during construction of wells #205 and #206. -6- COURT PAPER *TATE OF GIIpMM1A STO. 113 iMEv.s•ia E6 34 mo