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APP-11-2005 BION 11 .59 AN GeoHydrologkc Consultant FAX NO 714 838 5701 P 02 <br /> Page 1 of 1 <br /> Jason Shaw <br /> From Mike Infurna [EH] [Mlnfurna@sjcehd com] <br /> Sent Tuesday, March 22 2005 7 54 AM <br /> To jeshydrogeo@sbcg{obal net <br /> Subject RE TOC 171 -Well Abandonment/construction (VW-5) <br /> sounds fine <br /> I hereby approve this procedure Please fogow,up with a formal work plan addendum via US Mail <br /> good job <br /> you still want to start Thursday, March 24, 20057 <br /> West Haz Mat/TransAmerica still the drill contractor? <br /> ----Original Message----- <br /> From- Jason Shaw [mailto jeshydrogeo@sbcglobal net] <br /> Sent Monday, March 21, 2005 5 26 PM <br /> To- Mike Infurna [EH] <br /> Cc: 'Richard VogV <br /> Subject, TOC 171 - Well Abandonment/construction (VW-5) <br /> Mr Infurna, <br /> As per our discussion(s)today, I am drafting this email to propose the well abandon ment/completion of <br /> VW-5 at the Thrifty Oil Co Station located at 1250 North Wilson Way, Stockton, CA Taking your advice <br /> �I into consideration, we have decided to use medium size bentonite chip to backfill from total depth plus one <br /> foot (91 feet) to 52 feet below ground surface(bgs) <br /> The borehole is proposed to be overdrnlled with 10 5-inch augers A number 3 Monterey sand pack will be <br /> used from 52 feet bgs to 23 feet bgs A two-inch diameter schedule 40 PVC 0 020" slotted screen will be <br /> set from 50 feet bgs to 25 feet bgs (25 feet total screen) with a two-inch diameter sch 40 PVC blank <br /> extending from 25 feet bgs to just below the surface A three-foot bentonite chap seal will be placed from 23 <br /> feet bgs to 20 feet bgs, with portland cement extending from 20 feet bgs to two feet bgs, and a two-foot <br /> concrete seal will extend to ground surface A 12-inch flush well box (traffic rated)will be utilized to protect <br /> the newly installed well <br /> The current cement seal extends to approximately 18 feet bgs, which should not pose a problem (for vapor <br /> extraction) in drilling the borehole with 10 5" augers in the newly installed well where the seal will extend <br /> below the current depth to a depth of 20 feet bgs <br /> Please review and reply at your earliest possible convenience so that we can schedule accordingly <br /> Thank you for your time <br /> S mcerely, <br /> ,Jason Shaw <br /> Geohydrologic Consultants Inc <br /> 714 966 5333 <br /> .y <br /> 4/11/2005 <br />