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Ms. Lori Duncan, SJCEHD <br /> Closure Response S iE C O R <br /> ARCO#6060 <br /> June 29,2007 <br /> Page 2 <br /> i <br /> Therefore,the RBCA concluded that the residual concentrations of petroleum hydrocarbons in' <br /> the soil and groundwater at the site do not pose a threat to human health or the environment. <br /> i <br /> REQUEST FOR SITE CLOSURE <br /> The results of the RBCA analysis indicate that the residual concentrations of petroleum <br /> hydrocarbons do not pose a threat to human health and the environment. Therefore, SECOR <br /> would like to request site closure for ARCO 6080. <br /> If you have any questions regarding this letter, please do not hesitate to call us at (916) 861- <br /> 0400. <br /> Sincerely, <br /> SECOR International Incorporated <br /> Kristi Shelton Rusty Benkosky, P <br /> Associate Engineer Principal Engine <br /> cc: Mr. Don Pratt,Atlantic Richfield Company(uploaded to Enfos) <br /> Mr. James Barton, Regional Water Quality Control Board <br /> y <br /> Attachments: Attachment 1 — Regulatory Correspondence <br /> Attachment 2-.Risk Based Corrective Action Analysis <br /> SECOR International Incorporated <br /> } <br /> r � <br />