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Gabriel Gonzalez [EH] <br /> From: Tim Cuellar <tcuellar@advgeoenv.com> <br /> Sent: Tuesday, March 31, 2015 11:15 AM <br /> To: Gabriel Gonzalez [EH] <br /> Subject: RE: 14749 Thornton Rd., Lodi (3 B's) Permit <br /> Gabriel, <br /> We will use 12-inch sonic casing to remove the conductor casing/outside annular seal. <br /> I do not recall why 15.25-inch HS Augers were proposed for 8-inch borehole other than it was a typo.from the MW-13,- <br /> 14,-15 conductor casing boreholes.We are not proposing to use hollow stem augers at all for these abandonments, <br /> rather all sonic casing, sonic core barrel and sonic over drill methods. <br /> Thanks-Tim <br /> From: Gabriel Gonzalez [EH] [mailto:gagonzalez@sjcehd.com] <br /> Sent: Friday, March 27, 2015 2:04 PM <br /> To:Tim Cuellar <br /> Subject: RE: 14749 Thornton Rd., Lodi (3 B's) Permit <br /> Tim, <br /> Thank you for the information,figure and table.As shown in the well design figures, MW-13, MW-14, and MW-15 have <br /> an outside conductor casing annular seal within the first 11 feet. How does AGE plan to remove this outside annular <br /> seal? <br /> Also, in the original work plan,AGE had proposed "...15.25-inch hollow stem augers will initially be utilized (CME-95 <br /> hollow stem drill rig)at wells MW-11 and MW-12 to over-drill to each grout seal depth..." Please clarify the purpose of <br /> originally proposing 15.25-inch hollow stem augers to drill out the grout seal in MW-11 and MW-12.The well design <br /> figures for these two wells only show a maximum diameter of 8 inches(please see the attached file). Do MW-11 and <br /> MW-12 have annular seals that extend beyond the 8-inch diameter? <br /> Thank you, <br /> Gabriel <br /> From: Tim Cuellar fmailto:tcuellar(&advaeoenv.com] <br /> Sent: Friday, March 27, 2015 11:42 AM <br /> To: Gabriel Gonzalez [EH] <br /> Subject: RE: 14749 Thornton Rd., Lodi (3 B's) Permit <br /> Gabriel, <br /> Attached please find a revised as-built construction table summarizing destruction method (i.e. sonic drill) and a site <br /> plan that depicts each well location (wells MW-7 through MW-15). <br /> Hollow stem augers will not be utilized for any portion of these well abandonments.All 3 conductor casings consist of 8- <br /> inch diameter between 1'-11' bsg.The inner annular seal was also installed with volclay,so I anticipate the conductor <br /> casing being removed utilizing the hydraulic lift on drill rig. <br /> i <br />