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Angelica Sandoval Marin [EH] From: Angelica Sandoval Marin [EH] Sent: Wednesday, May 21, 2014 2:09 PM To: 'Mike Sonke' Subject: RE: U-Haul Store #70950, 2701 N. Wilson Way Stockton: Well Destruction Determination Mike, I have started reviewing your proposal for well destructions on this site and needed some additional information. In your Closure Report, dated June 20,2013, introduction section, page 4,you indicated that a "final groundwater sampling event was performed on November 5 through 7, 2012." Please email me the raw data for this sampling event date and submit it to GeoTracker, titled: Closure Report Addendum 2. Once, you have provided this data, I can proceed with the well destructions proposal. Thanks Angelica Angelica Sandoval Marin, Senior REHS San Joaquin County, Environmental Health Department 1868 E. Hazelton, CA 95205 (209)468-2807 desk (209)468-0341 fax Email: amarin@sicehd.com From: Mike Sonke [mailto:mike.sonke(cbcardno.com] Sent: Thursday, May 01, 2014 3:30 PM To: Angelica Sandoval Marin [EH] Subject: U-Haul Store #70950, 2701 N. Wilson Way Stockton: Well Destruction Determination Hi Angelica, I am developing the well destruction workplan for U-Haul Store#70950, 2701 N. Wilson Way Stockton. As part of this process, I am attempting to apply the SJCEHD Well Standards in determining the destruction method appropriate for each well, before I reflect this determination in the workplan. While there is no debate that most of the wells will be overdrilled, I would like to bring to your attention the exceptions. Please see the attached marked up map. The "pink" wells are proposed to be overdrilled and the "blue" wells are proposed to be pressure grouted. The "yellow" wells are those that I could see going one way or the other. The "yellows" are either clean wells in an area of known contamination (AS-15, AS-17, AS-20) or they are virtually clean; with just slight hits. I would suggest AS-15, AS-17, AS-20 be overdrilled but suggest MW5 A/B/C be pressure grouted. My rationale the determination on the "yellow wells" is not terribly scientific except that AS-15, AS-17, AS-20 are located in an area with known gw contamination. And since these wells will be overdrilled, it just make sense that the AS wells in the vicinity be OD too.