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w Page 1 of 1' <br /> Lori Duncan [EH] <br /> From: Stephen Muir[stevemuir@sbcglobal.net] w + <br /> Sent: Monday, December 10, 2007 5:19 PM <br /> To: Lori Duncan [EH] . <br /> Subject: ST&E Workplan Approval Letter <br /> Attachments: 3953416565-Figure8.pdf <br /> Lori: Attached is modified Figure 8 showing the fourth soil boring and potential groundwater <br /> monitoring well. <br /> In the approval letter your requested justification to conduct the geophysical survey. The rationale for <br /> conducting the limited geophysical survey is as follows: (1) It is unclear that all piping related to the <br /> UST removal was actually taken out at the time of the abandonment; (2) We do not have an adequate "as <br /> built" map of the site showing subsurface pipes, wiring or third party pipelines that are common along <br /> railroad right of ways; and(3) Underground Service Alert will not extend their service behind the <br /> railroad perimeter fence, I have already checked with them. Items 2 and 3 are most important to avoid <br /> an unnecessary dig-in. Cost to conduct survey is estimated at<$2,000. <br /> We plan to use V&W Drilling.to do this work. V&W will obtain permits with your department. Our <br /> time frame for drilling is December 18/19, 2007: I will let you know at least 48 hours prior to drilling. <br /> If you have any questions please do not hesitate to call or have Nuel call. Thank you. SGM _ <br /> i <br /> 12/11/2007 <br />