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• • <br /> River Islands at Lathrop 5044.5.001.01 <br /> Monitoring Wells MW-13, MW-15, MW-18 and MW-20 April 13, 2006 <br /> SUMMARY OF MONITORING WELL REPAIRS Page 2 <br /> ' Monitoring Well MW-18 <br /> MW-18 is located between the existing San Joaquin River Levee and the recently graded Perimeter <br /> ' Levee on the eastern side of the River Islands property. This well had been covered over by <br /> approximately two feet of soil during the construction of the perimeter levee. The well is <br /> constructed of one-inch-diameter Schedule 40 PVC encased in concrete. The soil was excavated to <br /> ' a total of 2%2 feet bgs to reveal the existing pipe and repair the well. New protective crash posts and <br /> a lockable monument were installed to protect the well casing. <br /> ' MONITORING WELL,MW-18 <br /> ' Monitoring Well MW-15 and MW-20 <br /> MW-15 is located on the southern portion of the property adjacent the Paradise Cut levee. MW-20 <br /> ' is located on the Northern portion of the property adjacent the Old River Levee. At these locations, <br /> the wells had been covered by overgrown vegetation, but had been adequately preserved by a steel <br /> pipe encasing each well. These wells are constructed of 1%2-inch Schedule 40 PVC encased in <br /> ' concrete. No casing repair was required at these locations, but lockable monuments and protective <br /> crash posts were installed to protect the well casings. <br /> 1 <br /> MONITORING WELL,MW-15 MONITORING WELL,MW-20 <br />