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0 • <br /> San Joaquin County Environmental Health Department 5747.003.002 <br /> Monitor Well Destruction(MW-5 and MW-6) May 9,2014 <br /> WORK PLAN FOR WELL ABANDONMENT Page 2 <br /> San Joaquin County records indicate that groundwater in the immediate vicinity of the site has <br /> no known contamination. <br /> SCOPE OF SERVICES <br /> Our proposed scope includes drilling out the existing wells and grouting the subsequent <br /> boreholes. <br /> We will coordinate with a licensed drilling contractor to over-drill the wells to a depth of <br /> approximately 17 feet bgs, or the bottom of the previous borings, whichever is deeper. Drilling <br /> will be accomplished using a truck-mounted hollow stem auger drill rig equipped with <br /> 8-inch-diameter augers in order to remove the annular seal around each well. Given that the <br /> subsurface material is not suspected to be contaminated, drilling cuttings will be discharged on <br /> the ground surface near each of the wells. <br /> Once the wells have been adequately removed, the boreholes will be grouted with neat cement <br /> by tremie method to approximately 5 feet bgs. Bentonite pellets, which will be adequately <br /> hydrated,will be placed in the remaining five feet to the ground surface. <br /> SCHEDULE <br /> We plan to complete the well destruction by May 31, 2014 pending approval of this work plan <br /> and favorable weather. It is our understanding that because the parcels for MW-5 and MW-6 are <br /> owned by the same entity they may be covered under the same permit. <br /> If you have any questions on any portion of this work plan, please call and we will be glad to <br /> discuss them with you. <br /> oQROFESS/o <br /> Sincerely, �Q`� oS�F T00� Fti <br /> 61 <br /> ENGE Incorporated <br /> W No. 2677 rn <br /> * Exp.6/30/2014 <br /> c�0TECVA <br /> N��'Pv�'� <br /> Richard G ndol o, C SC oe Too e, GE qTF OF CP.��F�� <br /> Attachment: Site Ian <br />