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Page 2 of 3 <br /> i <br /> that point,two different methods will be used to finish the destruction. <br /> For the non-obstructed monitoring wells MW3 and MW4,we are proposing to proceed as originally <br /> proposed and overdrill the remaining casing,screen and construction materials and grout up the <br /> borehole. <br /> i <br /> For the obstructed wells, MW1 and MW2 we are proposing to use an air knife to remove the soil and the <br /> sand pack materials from around the remaining casing and screen to the excavation depth limitations of <br /> the air knife.Then we are proposing to attempt to remove the casing and grout up the resulting voided <br /> space. If it appears that the entire casing cannot be exposed due to high groundwater, excessive soil <br /> sloughing or limits of the air knife, it has been suggested that perhaps the casing/screen could perhaps <br /> function as a tre.mmie pipe, by knocking out or cutting off the terminal cap and filling the void with grout, <br /> as the casing/well screen is extracted. <br /> Does this sound acceptable? <br /> i <br /> If so, do you need me to amend the workplan to reflect this? <br /> Please call me if you have questions or concerns. <br /> Thanks! <br /> Michael D. Sonke <br /> PROJECT MANAGER I BUSINESS DEVELOPMENT I GHG VERIFIER <br /> CARDNO ATC <br /> i <br /> ATC <br /> thoF=9. <br /> Phone(+1)209-579-2221 Fax(+1)209-579-2225 <br /> Address 1117 Lone Palm Avenue,Suite 2016,Modesto,CA 95351 <br /> Email mike.sonke@cardno:com Web www.cardnoatc.com-www.cardno.com <br /> This email and its attachments may contain confidential and/or privileged information for the sole use of the intended recipient(s).All <br /> electronically supplied data must be checked against an applicable hardcopy version which shall be the only document which Cardno warrants <br /> accuracy.If you are not the intended recipient,any use,distribution or copying of the information contained in this email and its attachments is <br /> strictly prohibited.If you have received this email in error,please email the sender by replying to this message and immediately delete and <br /> destroy any copies of this email and any attachments.The views or opinions expressed are the author's own and may not reflect the views or <br /> opinions of Cardno. <br /> ED <br /> i <br /> ATC Associates Transitions to Cardno ATC <br /> For many years,ATC has been a valued partner,focused on helping our clients achieve their project goals. <br /> This past March,ATC joined forces with global environmental and professional services leader, Cardno. <br /> Cardno delivers physical,social, and economic infrastructure services worldwide.With ATC,Cardno <br /> employs a approximately 7,500 staff in over 270 offices worldwide.4,500 of those staff are within the U.S. <br /> pp Y <br /> On October 1st,our"doing business as"name transitions to Cardno ATC to reflect the comprehensive <br /> 7/5/2013 <br />