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San Joaquin County February 18, 7 <br /> Ms. Mary Mea s -2- PR3-1 <br /> Decommissioning of Wells <br /> The monitoring wells will be decommissioned following.the guidelines set forth in Section 6 <br /> of the Well Standards established by San Joaquin County,Public Health Services, <br /> Environmental Health Division. The decommissioning will be performed by a C-57 licensed <br /> well driller under the supervision of a State of California Registered Geologist or Engineer. <br /> Prior to decommissioning,the wells will be cleared of debris to its entire depth to eliminate <br /> any obstructions which might interfere with effective sealing procedures. The well casing <br /> will be grouted. The grout will be mechanically mixed and will consist of approximately 5- <br /> 10 gallons of water per sack (94 pounds) of Portland cement. A tremmie pipe will be used to <br /> place the grout from the bottom of the well to the surface. The area within a 1-foot diameter <br /> around the outside of the conductor casing will be excavated to a maximum depth of.3 feet <br /> below the ground surface. The PVC well casing will be cut off six-inches above the bottom <br /> of the excavation and removed. Grout,will be allowed.to spill over;into the excavation and <br /> filled to a thickness of one foot to form a cap a"minimum`of 1 foot in diameter. After the <br /> grout has set, the excavation will be backfilled.with clean native soil. For wells in paved <br /> areas asphalt or concrete will be placed to match existing grades and surfaces. <br /> Two well destruction permits are attached to this work plan. Golder has contacted Mr. <br /> David Chavier of the Bank of Stockton to obtain permission to enter the site at 1245 West <br /> Weber in order to decommission monitoring wells MW-1S and.MW-1D. A minimum 24 <br /> hours of notice will be given to the San Joaquin County Public Health Services, <br /> Environmental Health Division and to Mr.David.Chavier prior to the decommissioning. <br /> If you have any questions,please do not hesitate to contact the undersigned. <br /> Sincerely, <br /> E <br /> GOLDER SOCIATES INC. <br /> is e L. S lento,P.E. <br /> Senior Engineer <br /> JJ/DLS/ca <br /> Attachment: Well Construction Logs; <br /> Well Permit Application <br /> Figure.I -Monitoring Well Location Map <br /> E cc: Mr. G. Brent Larson,The Union Ice Company <br /> 6100 East Sheila Street,Los Angeles,CA 90040 <br /> Mr.Jeff Lawson, c/o Reed Elliott Creech and Roth. <br /> 99 Almaden Boulevard, Eighth Floor <br /> San Jose,California 95113=1606 <br /> PR37592.io, Golder Associates <br /> Ar— <br /> �� <br />