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r <br /> URS <br /> Ms Lori Duncan Page 4 <br /> San Joaquin County Environmental Health Department <br /> ARCO 6080 <br /> February 20, 2006 <br /> Based on the review of historical soil and groundwater investigations, URS requests that ARCO Station <br /> No 6080 be considered "low risk" and recommends closure and No Further Action A checklist of data <br /> required by the RWQCB Central Valley Region for no further action at UST sates is presented as <br /> Attachment F <br /> This document is based on data, site conditions, and other information that are generally applicable as of <br /> the date of the document The conclusions and recommendations herein are therefore applicable only to <br /> that time frame <br /> If you have any questions or comments regarding this letter, please call Mr Vernon Elarth at <br /> (916) 679-2299E�\b� � sC) L S <br /> Sincerely, V rR D GE- <br /> ND <br /> � <br /> NSAOHO <br /> URS Corporation Americas ��`'� pAu� <br /> °N Fly C'c!-A <br /> A <br /> �` --- - No 7 20 <br /> * Exp <br /> Vernon Elarth, R G LP \� <br /> Project Manager qTF OF CA1-1F��� <br /> Enclosures <br /> Table I Groundwater Elevation and Analytical Data <br /> Table 2 Fuel Oxygenates Analytical Data <br /> Table 3 Groundwater Gradient Data <br /> Figure 1 Site Location Map <br /> Figure 2 Site Plan <br /> Attachment A Agency Correspondence <br /> Attachment B September 1999 Investigation <br /> Attachment C June 2000 Investigation <br /> Attachment D Boring Logs and Geologic Cross Section <br /> Attachment-E — Contaminant Mass Calculations -—— — - <br /> Attachment F Appendix A Checklist of Required Data for No Further Action Requests of <br /> Underground Storage Tanks <br /> cc Mr Paul Supple, Atlantic Richfield Company <br /> Mr James Barton, Regional Water Quality Control Board -Central Valley Region <br /> Project File <br /> • <br /> K 1WprocessV5 BP ARM06013010osure Rpts16080 Closure Report doc <br />