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Chevron Products Company Page 6 <br /> Former Chevron Service Station#9-5775,301 West Kettleman Lane,Lodi California July 15,2002 <br /> • GYVE and SVE operational data indicate a decline in hydrocarbon mass removal <br /> from the subsurface <br /> 5.0 RECOMMENDATIONS <br /> Based on the data presented above and as requested by the Regional Water Quality Control <br /> Board, Central Valley Region (RWQCB-CVR), in their letter dated, March 13, 2002 <br /> (Attachment G), SECOR recommends the following <br /> • No additional assessment activities, <br /> • To optimize the effectiveness of the SVE system it is recommended that SVE be <br /> discontinued during the fourth quarter 2002 (4Q02) to allow the subsurface to <br /> return to a static state which may allow for preferential flow paths to collapse <br /> Following the 4Q02 SVE will be reinitiated and re-evaluated on a quarterly basis, <br /> • The continued operation of the GWE system, and, <br /> • The continuation of quarterly groundwater monitoring and sampling <br /> I IChevron1957751Penodic Monitoring\Quarteriy Progress Reports1200212nd Quarter-2002 Progress Report doc <br />