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• • Page 1 of 3 <br /> Mike Infurna [EH] <br /> From: Mike Infurna [EH] <br /> Sent: Tuesday, October 14, 2008 1:02 PM <br /> To: 'John Cooper' <br /> Subject: RE: Lima Ranch boring abandonment <br /> looks better. <br /> Call me about 30 minutes before you need the first grout inspection please. <br /> From: John Cooper [mailto:jcooper@gercorp.com] <br /> Sent: Tuesday, October 14, 2008 12:03 PM <br /> To: Mike Infurna [EH] <br /> Cc: Fisher, Vidor <br /> Subject: RE: Lima Ranch boring abandonment <br /> Mike, <br /> I was planning to use 4-5 feet of well screen at the bottom of each borehole as a temporary well. <br /> Regarding abandonment of the boreholes, I spoke with Tracy at Test America. They will put a slip cap at <br /> the bottom of the well casing, and use a rod to knock the cap off after we have collected our sample. They <br /> will then place the grout through the casing, using it as a tremie pipe. <br /> John <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjcehd.com] <br /> Sent: Tuesday, October 14, 2008 11:45 AM <br /> To: John Cooper <br /> Subject: RE: Lima Ranch boring abandonment <br /> Thank you John. <br /> Your abandonment procedures need some work. First, how much sand/and <br /> screened interval are you planning on? the drawing looks like 5' ? <br /> I have a concern with leaving the sand in the borehole without knowing the <br /> nature of the contamination, if present. For 'wells' in areas of known or <br /> suspected contamination, well destructions require removal of the contents <br /> placed in the hole. As in removing the sand, the PVC, and the bentonite seal. <br /> Leaving the sand with grout on top is unacceptable. <br /> There is another option. Sand slurry cement grout is an exceptable grout <br /> material. You can accomplish compliance with our Well Ordinance by pumping <br /> a NEAT cement grout down the PVC well casing after your samples are <br /> collected and you are done with the well. Prior to this, POPPING out the <br /> bottom casing cap will allow the casing to now be a "tremie" pipe. By pumping <br /> neat grout down this casing as it is pulled up, the sand left in the hole will mix <br /> 10/14/2008 <br />