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y _ <br /> p 1612 Hammer Lane <br /> page 2 of 2 <br /> Soil vapor extraction well VW-5S was built with a screened interval extending from 5-15 <br /> feet below surface grade (bsg), and while depth to water across this site has ranged <br /> from approximately 25-30 feet bsg since it was installed , the measured depth to water in <br /> this well has ranged from approximately 9-15 feet bsg. No comment on or explanation <br /> for this anomaly has been made by your consultants. This well is built in the same <br /> borehole as VW-5D, whose depth to water has consistently measured within the normal <br /> -range forthesite.If you choose to discontinue the interim remediation of SVE/AS at this site you may do <br /> so. SJC/EHD directs that you proceed with submittal of the previously requested work <br /> plan to investigate the vertical extent of the groundwater contamination , and to install <br /> monitoring wells that will intercept first groundwater. In addition, a site conceptual model <br /> must be prepared. These items due for submittal to SJC/EHD no later than <br /> August 30, 2004. <br /> I If you have any questions please call Lori Duncan at (209) 468-0337 <br /> Donna Heran, REHS, Director, <br /> Environmental Health Department <br /> Lori Duncan , Senior REHS _ Nuel C. Henderson, Jr., RG . <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: James Barton, CVRWQCB <br /> Vernon Elarth, URS <br /> s <br />