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't <br /> s n 1672 Hammer Lane <br /> page 2 of 2 <br /> Soil vapor extraction well VW-5S was built with a screened interval extending from 5-95 <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"for-the-siter— <br /> If you choose to discontinue the interim remediation of SVEIAS 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 /> If you have any questions please call Lori buncan at(209)488-0337 <br /> Donna Heran, RENS, 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: .lames Barton, CVRWQCB <br /> Vernon Elarth, URS <br /> A _ <br />