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Former Beacon Station No�474 December 3,2013 <br /> Stockton,California Well Destruction Work Plan <br /> Pressure grout selected wells; emplace neat cement, via pump and tremie set <br /> within three feet of the total depth of the well casings to within 3 feet bsg; <br /> apply air pressure for approximate 10 minutes; top off neat cement until grout <br /> level is stabilized within 3 feet bsg; drill out the top 3 feet of the well with an <br /> auger with a diameter approximately 1 foot greater that the original borehole; <br /> excavate soil an additional 0.5 foot below the casing stub; emplace neat <br /> cement in the bore hole to within 1 foot of surface; emplace native, sandy or <br /> base material and restore the surface, as required for each well location. <br /> Task 3 Collect four samples of drill/well cuttings for disposal characterization; <br /> submit samples to Kiff Analytical LLC (Kiff), a California-certified (NELAP <br /> - _- #08623CA) analytical laboratory located in Davis, California with chain-of- <br /> custody documentation; and request samples be combined into one composite <br /> sample and analyzed for TPHg, BTEX and total lead. <br /> Task 4 Dispose well cuttings and debris to appropriate facility; update GeoTracker <br /> with well destruction data; prepare and submit Department of Water <br /> Resources Well Destruction Report for destroyed wells; and prepare and <br /> submit well destruction report to EHD. <br /> Please call Horizon at 916-939-2170 if you have any questions or require additional <br /> information. <br /> Sincerely, '" <br /> HORIZO ENVIRONMENTAL INC. <br /> Rexford Smith, PG No. 5307 w0, sJ• n <br /> Project Manager <br /> Enclosure <br /> cc: Mr. Roger Levin, Ultramar Inc. <br /> Mr. James L.L. Barton, CRWQCB—Central Valley <br /> Ms. Jean Lee <br /> Project No. 1474.03 2 HORIZON:ENVIRONMENTAL INC. <br /> Well Destrct WP 12-2-13.doc <br /> ` I <br />