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"Harlin Knoll [EH]" To: <Anne_Wanken@urscorp.com> <br /> <HKnoIlCsjcehd.com> cc: <br /> 02/13/2004 11:52 AM <br /> Subject: RE:ARCO Station No. 02093 <br /> , <br /> With the graphs. and declining contaminant trends, we can ask the CVRWQCB for <br /> i site closure consideration. <br /> Hk <br /> -----Original Message----- <br /> From: Anne_Wanken@URSCorp.com [mailto:Anne_Wanken@URSCorp.com] <br /> Sent: Friday, February 13, 2004 9:01 AM <br /> To: Harlin Knoll [EH] <br /> Cc: vernon_elarth@urscorp.com <br /> Subject: ARCO Station No. 02093 i <br /> C <br /> Harlan, <br /> Thank you for getting back to me about ARCO Station No. 02093 . This is one <br /> of the ARCO sites that URS has identified as a potential closure site for j <br /> 2004 . During our telephone conversation today, you informed me that you } <br /> and Jim Barton (RWQCB--CVR) would like to see graphs of each well that has <br /> historically been impacted with petroleum contamination. The graphs should <br /> graph the following information over time: [ <br /> - concentrations of benzene, MtBE, and 1,2-DCA (if present) using a <br /> logarithmic scale <br /> groundwater elevation <br /> It is my understanding that the trends shown on these graphs should be <br /> evaluated and discussed in a letter and presented to you and Jim for your I consideration. •It the trends are favorable and show that the <br /> i concentrations have been significantly remediated and/or attenuated, we i <br /> will proceed with a closure request report. <br /> Please let me know if I have understood your request. Thank you again for <br /> your time and consideration of this site for closure. <br />+ Anne M. Wanken <br /> Senior Compliance Specialist ; <br /> URS Corporation . <br /> 2870 Gateway Oaks Drive, Suite 300 <br /> Sacramento, California 95833 <br /> (915) 679-2346 - direct phone <br />$ (916) 679-2900 - fax <br /> Y <br />