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'Boyett Petroluem -3- <br /> October 19, 2007 <br /> ' . Claim No. 14172 <br /> C. Groundwater Trends: <br /> • MTBE trends are shown below <br /> Claim 14172' <br /> } <br /> Toa - <br /> saa R <br /> 500 — _ _ _. 1-+- MW-7 <br /> aaa �- j-"G—MW-10 <br /> W 300 - -- - <br /> 200 <br /> - -ate- - I <br /> EW-1 <br /> 10 <br /> r—+we-T—•"•'_"•_--c -r-►"u—fes:--" ---(;.3. . <br /> .(0 CSD (0 P+• <br /> (D a 0 0 © a 0 a o 0 0 <br /> 0 0 0 0 0 0 0 0 0 0 0 <br /> N N N N _N N N N N N CV <br /> M <br /> Co <br /> C`') M M .M M M C"7 M ti . <br /> N et co N- 'IT oo N '�' co N <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: four wells identified within % mile of the site, <br /> wells are 1537 feet southwest, 1901 fret east southeast, and 2.170 feet north of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: retail gasoline station <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: none conducted <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: The Fund recommends this site be considered for closure <br /> providing the potential for soil vapor migration is assessed and determined safe <br /> for prescribed site activities,, public participation and fee title notifications are <br /> conducted, and the monitoring wells are appropriately abandoned. <br /> r <br /> Kirk Larson Date "'Robert Trommer Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (915) 341-5684 <br /> CaJif�rui,�Gnvirc�n.rtlent�l.Protc�ctnnAgency <br />