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a <br /> s:9 <br />�4r <br /> Mr. Kyle Christie <br /> January 5. 1989 <br /> Page 8 <br /> groundwater sampling are unexpected. The piesence of BETX constituents in monitoring <br /> well PR-1 may be the result of a sampling error, or the possible migration of an off-site <br /> source of hydrocarbons toward the ARCO site, resulting from continued recovery system <br /> operation. We recommend that well PR-1 be resarnpled immediately to verify the presence <br /> of dissolved hydrocarbons. <br /> Very truly yours, <br /> BROWN AND CALDWELL <br /> Larry Phillips <br /> Project Manager <br /> LEP:PYD:mhw <br /> Enclosure <br /> r <br /> AN 2 71989 <br /> ENVIRONMENTAL HEALTH <br /> t <br /> PERMIT/StEWCES <br /> BROWN AND CALDWELL <br /> 7235 STREET SACRAMENTO.CALW*RN1A9S114-?=•(916)444-0=27 - <br />