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Ik <br /> { Caltrans District 10 <br /> 'f <br /> Maintenance Station <br /> • • �it <br /> Prioritization ;k <br /> Site Rationale <br /> 1. Old Sonora Plume not defined In down gradient direction; <br /> 785 Mono Way MTBE present <br /> 1 Sonora <br /> { <br /> 2. Altaville Plume not defined'Itowards new tank basin or to <br /> 154 Monte Verde Street the Southwest <br /> 3. Peddler Hill _ r _ Plume not defined Ido"gradient#of MW-5; last _- <br /> 41951 Hwy 88 sampling of MW-5 was 590 ugll TPHd <br /> 4. Stockton Shop 10 In developed area;`�historic high benzene conc; <br /> 1603 B Street active remediation; plume defined <br /> 5. Stockton Yard In developed area; stiniated substantial mass in <br /> 1604 B Street soil; ground water Plume defined <br /> 6. Caples Lake Plume defined; Caples Lake is down gradient; <br /> 20 Schneider Camp Rd. RWQCB requested fate and transport model <br /> 7. Sonora Plume defined dovin gradient; site approaching <br /> 8910 Hwy 49 low-risk status according to RWQCB <br /> Jamestown k <br /> 8. Long Barn Soil only contaminated; tank pit overexcavated; <br /> - - --25860=Sugar Yie-Rd: �Boom mplee`an;lateialyeztent noftli def. <br /> 9. Midpines Low concentrations of MTBE {2.3 ug(l) in <br /> j Hwy 140 down gradient well <br /> 10. Groveland Source removed; conducting risk assessment for <br /> 18939 Ferretti Rd. closure <br /> ' 11. Pine Grove 2005 MTBE below MCLi in one well; <br /> 19587 Hwy 88 conducting risk assessment for closure <br />