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CORRECTIVE ACTION PLAN <br /> CHEVRON STATION #9-4183 <br /> 236 NORTH HAM LANE <br /> LODI, CALIFORNIA <br /> JANUARY 20, 1996 <br /> 1.0 INTRODUCTION <br /> This document is intended to fulfill all the requirements for a <br /> Corrective Action Plan for Chevron Station 9--4183, as requested by <br /> San Joaquin County. The service station is located at 236 North <br /> Ham Lane in Lodi , California (Figure 1) . Underground storage tanks <br /> (USTs) and surface Facilities for service station operations will <br /> be removed. <br /> The scope of work proposed in this work plan includes: <br /> Underground Storage Tank Removal <br /> * Soil Excavation <br /> * A Proposal for Verification Monitoring <br /> Further corrective action measures may be necessary depending on <br /> findings from the activities proposed in this workplan. <br /> 2 .0 SITE CONDITIONS <br /> The site is an operating service station awaiting demolition. The <br /> station was constructed in 1.969 , and the facilities on-site include <br /> two 10, 000 gallon and one 5,000 gallon. gasoline USTs, one 1,000 <br /> gallon used oil UST, and two product. islands. <br /> Regional groundwater depths range from 40 to 60 feet below grade <br /> surface (bgs) . Recently installed groundwater monitoring wells <br /> were sampled in August of 1995 and depth to water at that time was <br /> 41 to 45 feet bgs. The groundwater flow direction is southwest. <br /> 3.0 SCOPE OF WORK <br /> A combination of facility removal and soil remediation will be <br /> performed concurrently. Soil remediation will be performed by <br /> excavation where areas of obvious hydrocarbon impacted soil are <br /> exposed during construction activities. <br /> 3 . 1 UST and Facility Removal <br /> A total of four USTs will be removed from the site. All standard <br /> protocol for the tank removal (San Joaquin County and Regional <br /> Water Quality Control Board (RWQCB) guidelines) will be followed. <br /> Excavation work will be performed by Fillner construction, a <br /> licensed contractor. <br /> Soil samples will be collected, two from beneath each UST, at the <br /> base of the excavation. Soil samples from the excavation will be <br /> collected from the excavator bucket by removing the top few inches <br /> 1 <br />