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Page 2 of 5 <br /> From: Yan, Josef mailto !flse,Yan@stantec,eorn,] <br /> Sent; Tuesday, October 18, 20113:15 PM <br /> To: Vicki McCartney [EH] <br /> Cc: Francini, Catherine <br /> Subject: RE: Well Destruction - BP 11193 (3202 W Hammer Ln, Stockton, CA) <br /> Hello Vicki, <br /> 1 would like to verify that this is the latest MFR form: http;l/www.sjgov.pfglph0/do_cs/MFR- <br /> UNIT%-2.OIV.pdf. Also, does SJCEHD have instructions/template on how to complete the } <br /> MFR?. <br /> We received a letter yesterday from the CRWQCB concurring with SJCEHD closure <br /> recommendations;please see attached. Please verify that this is the correspondence you are <br /> looking for and if we could proceed with the well destruction project. <br /> We plan on submitting the well destruction work plan along with the permit applications, <br /> check, and access agreements. The City of Stockton encroachment permit for three right-of- <br /> way wells would not be ready as we plan on submitting this at the same.time as the well <br /> destruction permit applications-'will SJCEHD be able to process the permit application i <br /> .without the encroachment permit? <br /> Lastly, please confirm that the following methodologies are acceptable to SJCEHD for <br /> destroying the 23 wells. We plan on including these on.our work plan. <br /> Based on the San Joaquin County Well Standards section 13.17.6: "If the well construction is <br /> unknown and/or is located in.an area of known or.suspected pollution or contamination, the <br /> well shall be destroyed by removing all material within the original borehole (including the well <br /> casing, screen, filter pack, and annular:seal); and the created hole filled completely with- <br /> appropriate sealing.material." <br /> Based on the 2Q11 QMR(see attached), MW-4, MW-7, and MW-9 are wells with MTBE . <br /> above.the laboratory MRL (with only MW-9,above the 13 ug/L MCL). MTBE for the rest of <br /> the monitoring wells are below the laboratory.MRL. Additionally, injection wells OS-1 through <br /> OS-10 are located in the area where the,MTBE plume is not suspected. Considering.these, <br /> the following is proposed:. <br /> 1. Pressure-grout casing, air-knife.to 3 ft bgs (section 13.17.12), cut casing t63.5 ft bgs <br /> (section 13.17.12), form a mushroom cap (section 13.17.13), backfill with clean soil <br /> (section 13.17.14), and resurface borehole to match existing surface for wells MW- <br /> 1 R, MW-2R, MW-3 through MW-8, MWA0, MWA 1, MW-13, VW-1, and OS-1 <br /> through OS-10. <br /> 2. Air-knife, over-drill, grout to 1 ft bgs, and resurface'borehold to match existing surface ± <br /> for well MW-9 <br /> Thank you in advance. <br /> Jose Yan <br /> Engineering Associate <br /> Stantec Consulting Corporation <br /> 3017 Kilrgure Read Suite 100 <br /> Rancho Cordova CA 55670 <br /> Ph: (916) 861-0400 Ext. 245 <br /> Fx: (916) 861-0430 <br /> Cell: (530)219-4392 <br /> jose,yan rr stantec_com <br /> 11/14/2011 <br />