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i <br /> ARCO -3- April 14, 2009 . <br /> Claim No. 15783 <br /> C. Groundwater Remediation: <br /> • METHOD: ozone injection , - <br /> • DURATION: delayed <br /> D. Groundwater Trends: r- T <br /> • MTBE and TBA trends are shown below: <br /> =,a Result414, <br /> s <br /> ��''^��•:: s <br /> '�;iM"s;'�'.�:imu.',<'.+.. , �z � 4 � rr u•• +,.E %;yr"a .9 n•��,r�:#•.a� <br /> .k :,. '� •'''e e�fxy�,.x-3^ � e w i w.° r k , h C "�p3.'a ( �f '`�°'X?" , <br /> T'?5 u72000.. s..q• ( yre{ a,SIY'd. <br /> 7=j:1 ODOO s °�L'w <br /> N <br /> ' "•�:"P����Z11�0� X *ikz r 1 z ` � r r r � , �r 1 nk�� ��Q�p+ . <br /> 22,��s_ ti�:.:.,`.: "?a• •s,. �,��y +� x'+t�, r` i.V'tr "r � .a'7ki <br /> T y <br /> io <br /> Rdµ a49"�" •air`+ ala:,�a �,a° 'r r a w� Pe#� Cr tial 31 '' a "4dk <br /> + � + , ! r +. iii "'M(� + •s L• <br /> ' 44rryy 1 .r <br /> d- S I My. fi741 <br /> '•e'" <br /> �'s'a�aT.7lwsTERT-BC'J,TYL'ALCOHOL(TBA)wt .± NIETFIYL TER3-BUTYL ETHER(MTBE] '+�M .1�8p1h'10 d�Vatei •3 z�• <br /> P'Tr..w'xa r?''f•i 4 �s �j.g'',r f.t.r:Ri..'' t+',S^,.N. n.I'd> ""ak`r.:. -"{gat ,s. 3:,7Y.•7.iC'..:. <br /> VII. SENSITIVE RECEPTOR SURVEY- no wells identified within Y2 mile of the site <br /> Vlll. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: active 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: ozone injection, delayed <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> I <br /> i <br /> California Environmental Protection Agency <br /> P.r}Recycled Paper <br />