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• • Page 1 of 3 <br /> Mike Infurna [EH] <br /> From: MICHAEL.E.JENKINS@saic.com on behalf of Jenkins, Michael E. <br /> [MICHAEL.E.J EN KINS@saic.com] <br /> Sent: Monday,April 10, 2006 12:20 PM <br /> To: Mike Infurna [EH] <br /> Subject: RE: Alden Park Well Abandonment <br /> Mr. Infurna— <br /> I would like to speak with you at your earliest convenience about the proposed destruction of monitoring wells <br /> MW-1, MW-2, MW-13, and MW-17 at Alden Park in Tracy, California. As I mentioned earlier, I propose pressure <br /> grouting these wells as opposed to over-drilling them for several reasons. <br /> First, based on a letter from the California Regional Water Quality Control Board, to M. Scott Mansholt with <br /> Chevron Environmental Management Company, dated November 1, 2005, Mr. C. Dean Hubbard concluded <br /> .review of historical results indicates these wells have been consistently non-detect or contain very low PAHs and <br /> TPH-d, and/or is less than water quality objectives since sampling commenced in 1997"and "concur(s)with the <br /> plan to destroy the wells MW-1, 2, 13, and 17 that are either dry, up/cross-gradient or several hundred feet <br /> downgradient beyond existing monitoring wells." I understand you were cc'd on this letter. Since these wells are <br /> not`located in an area of known or suspected pollution or contamination"(San Joaquin County Well Standards, <br /> section 13.17.6), and since the construction of each of the wells is known, it is not necessary to destroy these <br /> wells"by removing all the material within the original borehole" <br /> Second, I believe pressure grouting these wells is more cost efficient, timely, and posses less risk to area <br /> residents. If these wells are over-drilled, I'm concerned potentially hazardous physical conditions will exist for <br /> several days along residential sidewalks. These conditions include open holes that result from additional utility <br /> clearances, damaged sidewalks, and steel or wooden plates over the sidewalks that will be required overnight <br /> that present an attractive nuisance or tripping hazard to local residents. By pressure grouting the wells, I believe <br /> we can repair the sidewalks in the same day and significantly reduce physical hazards overnight. <br /> I am hoping to complete the well destruction work by the end of this month, and would greatly appreciate your <br /> guidance and assistance in securing the necessary approval. I can be reached at the phone number below, or <br /> you can call me on my cell phone at 916-529-9371. <br /> Sincerely, <br /> Michael E. Jenkins, P.G. <br /> direct:(916)979-3842 <br /> From: Mike Infurna [EH] [mailto:MInfurna@sjcehd.com] <br /> Sent: Friday, April 07, 2006 3:47 PM <br /> To: Jenkins, Michael E. <br /> Subject: FW: Alden Park Well Abandonment <br /> opps, here's the website..page 29 is where the correct WD info is at.. <br /> http://www.sigov.org/ehd/docs/pdf/Well%20Standards.pdf <br /> ----Original Message----- <br /> From: Mike Infurna [EH] <br /> Sent: Friday, April 07, 2006 3:39 PM <br /> 4/19/2006 <br />