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I <br /> Response to PHS EHD Comments Letter Dated September-10, 2003 <br /> Extraction Well and Monitoring Probe Details <br /> Wright has prepared the anticipated. construction details for the wells and probes <br /> attached as Figure 1. The wells and probes would be installed under approved <br /> access agreements and PHS EHD permits. The undersigned CEG has reviewed the <br /> above workplan and attached well details specifications. <br /> Well and Probe Locations <br /> The two extraction wells and three vapor probes are anticipated to be installed in <br /> individually drilled hollowstem boreholes (clustered not in a nested installation) on <br /> the downgradient side of the site. The probes positions may be adjusted due to <br /> utilities and the very small size of the site, as well as to allow the interpreted best <br /> locations for collecting data. <br /> Measuring Gauge installation <br /> Magnahelix gauges will be installed on each well and probe wellhead and sealed to <br /> prevent leakage during testing and pressure readings, The gauges will be adjusted <br /> as needed by the engineer for the work. <br /> Well Installation <br /> Wright will schedule the well installation to commence by"October 18, 2003. <br /> If you have any questions, please call. <br /> Sincerely, <br /> Wright Environmental Services, Inc. S'��?,tE1 Q GFO� <br /> JP44 <br /> C1ul <br /> CORMER <br /> John Lynch Christopher M. Palmer EGI r`i 4R;yG <br /> i President REAII 20185; CEG 1262 sa GEOi_CUST <br /> Attachment. F=igure 1. Vapor Extraction Well and Vapor Probe Specifications <br /> Revision 1 - Page 3 of 3 <br /> a <br />