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Page 7 of 15 <br /> the 15-inch augers could easily wander off the grout column or become <br /> plugged during advancement, especially considering the depths of these <br /> wells. I believe that the method of destruction that is most protective of <br /> San Joaquin groundwater is to allow us to pressure grout and mushroom <br /> cap wells these problematic 1-inch diameter wells. I feel that this request <br /> is very reasonable in that all I am asking for is to destroy the wells in <br /> accordance with the California Well Standards detailed in DWR Bulletin <br /> 74-90 which would allow for the pressure grouting of these wells. Please <br /> know that I'm not trying to set a precedent with this and that I am only <br /> trying to do what I feel is best for my client and San Joaquin County's <br /> groundwater. Frankly speaking, it just doesn't make a lot of sense to me <br /> to increase the costs by literally thousands of dollars to end up with a <br /> grout seal that has no guarantee to be as good as the seal that we <br /> already have and know is working.And if you feel that this is something <br /> that warrants the approval of the director, please let me know what <br /> additional steps that would require. <br /> Thank you for working this out with me in advance. I, like you, would rather deal <br /> as many issues as possible while sitting nice and cozy in my office than in the cold <br /> January rain that I'm sure will start as soon we break ground. Please give me a <br /> call if you have any questions. <br /> Cheers and have a good weekend, <br /> Josh Ewert I Senior Staff Geologist <br /> Geocon Consultants, Inc. <br /> 3160 Gold valley Drive Suite 800, Rancho Cordova, CA <br /> 95742 <br /> Tel 916.852.9118 Fax 916.852.9132 <br /> www.geoconinc.com <br /> From: Mike Infurna [EH] [mailto:MInfurna(a)sjcehd.com] <br /> Sent: Thursday, October 13, 20113:21 PM <br /> To: Evans, Brenda; Jim Barton <br /> Cc: McKenna, Stephanie; BORGIOTTI, SERGIO I; noleason(a)DowneyBrand.com; <br /> jayallenl@iaatt_net; Jim Brake; Josh Ewert <br /> Subject: RE: 5400 and 5606 Pacific Avenue, Stockton -Well Destruction <br /> Information <br /> Ladies and Gentlemen, <br /> I have evaluated the proposal/list of wells and destruction <br /> methods submitted to me and have the following changes <br /> to bring to your attention. <br /> I looked for current and historical soil, water, or vapor <br /> laboratory data for each well that was listed to be <br /> destroyed by pressure grouting. As I have stated before, <br /> the SJCEHD has a Well Standard (Ordinance) that <br /> 12/20/2011 <br />