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IPage 2 of 3 <br /> a couple of the wells. So over drill is the plan. <br /> '. Brenda and Chris are available next week on Thursday and Friday the 23rd and 24th. How about <br /> you? Please reply to all so we can all set our schedules based upon your response! <br /> John <br /> 209-603-3394 <br /> ---= Original Message----- <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjcehd_com] <br /> Sent: Monday, July 13, 2009 9:46 AM <br /> To: jlynch@wrightenvironmentalservices.,com <br /> Cc: Brenda._crawford@Patc-usa.com_ <br /> Subject: Cox and Cox <br /> John, Brenda <br /> I <br /> hope you're well.. <br /> John, I finally got the Tracy HS access agreement and your single application for <br /> the well destructions. <br /> The EHD requires permits-per-parcel for borings/destructions but will allow <br /> offsite MW-4 to be included with the ONSITE application you submitted. You <br /> just saved $375. <br /> Additionally, the EHD requires wells with contamination to have the contents of <br /> the well removed (over-bored). You weren't clear on which ones you plan on <br /> pressure grouting or over boring. But I'll approve the following. <br /> Based on the most recent gw data (Jan 2008), and due to petroleum hits above <br /> levels of concern (MCLS or 100 ug/1 for TPH), these four wells are to be <br /> overbored to TD+1 foot: MW-2, 6, 7, and 9R. <br /> MW-2 is a 4-inch well and was put in with 10-inch augers and 10-inch augers or <br /> larger must be used to over bore it out. j <br /> MW-6, 7, & 9R are 2-inch wells installed with 8-inch auger and you may use 8- <br /> inch augers to overbore them out. <br /> i <br /> I'm also waiving the over-bore requirement for ALL wells. Typically <br /> wells located in "an area of known contamination" must have their contents <br /> removed. It's a toss up whether over boring in quicker or cheaper than the labor <br /> intensive pressure grouting. You have to make that choice John. Since pressure <br /> grouting requires a 'mushroom cap' of grout near the surface, many consultants <br /> have told me after that they should have just drilled them out after seeing the <br /> costs of the labor to dig out the soil to place the cap. the required dimensions for <br /> 7/14/2009 <br />