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Page 3 of 7 <br /> U <br /> ii <br /> no problem. change ok. <br /> I've ALWAYS thought it was easier and cheaper for shallow wells to o/bore rather than <br /> pressure grout. I'm ok with the change. <br /> there's always a chance on shallow o/bore wells that they can use the "popsicle" <br /> method. call me if you need it explained. <br /> one problem constantly pops up with o/bores....staying on the well casing the WHOLE <br /> depth. Check with your driller to make sure the / <br /> devise(s) they plan to use ensure the auger stays on, over, or destroys the PVC casing in <br /> the procedure. Worn out stinger tips (shorter than 24") have proven to be problematic <br /> and tend to drift off the casing. the lack of PVC, grout, bentonite; or sand in the cuttings <br /> to the TD of the well most likely indicates that the augers have drifted off the casing and <br /> is cutting a 'new' hole. Something I/the EHD does not approve of. <br /> if an auger drifts off on one well, I will require a, 'modification' to the procedure to ensure it <br /> doesn't happen on the next. I just came from a site where the driller was trying to drill to <br /> 70' bgs using a stinger tip only 10" long. he went off at 30' bgs and I stopped the drill. <br /> The next day they came back with a 30" stinger tip and stayed on the next three wells to <br /> TD with NO problems... <br /> another way to ensure no-drift is to install AW rods INSIDE the PVC to TD before <br /> drilling. Then, during the drill, there's no way an auger will drift off the casing since it <br /> won't cut thru the rods.. <br /> unfortunately, this procedure typically wraps the PVC around the rod and has been <br /> known to jam up inside the augers. some delays clearing the augers for the next well. <br /> can be handled with extra flights at the site_ <br /> so, you get to figure out the best way for you to complete the task. I'm looking for results, <br /> and results to me is that the "contents of the well have been removed"..you get to figure <br /> out how... <br /> long stingers or AW rods or option 3 (some other workable choice). I'm an 'ends' kinda <br /> guy....not a "means" kinda guys. <br /> I get to count the 'runs' and you get to figure out how to get the "hits".... <br /> but no change in the permit for changing to o/bore from pressure grouting. it's not <br /> uncommon for some wells scheduled for pg to get damaged or obstructed during the air <br /> knife/clearing stage. Damaged or obstructed wells can not be pg'd. so these wells must <br /> be o/bored. <br /> mike <br /> From: Gabe Stivala [mailto:gabe.stivala@atcassociates.com] <br /> Sent: Monday, October 03, 2011 1:20 PM <br /> To: Mike Infurna [EH] <br /> Subject: RE: 2701 March Lane, Stockton Well Destructions <br /> Hi Mike, <br /> 10/3/2011 <br />