Laserfiche WebLink
L • & S • ENVIRONMENTAL <br /> ASSESSMENT RESTORATION • & CLOSURE <br /> March 22, 1998 <br /> Ron Rowe <br /> San Joaquin County Public Health, <br /> 304 East Weber Ave <br /> Stockton,CA 94621 <br /> Subject: Monitor Well Abandonment for the EBMUD Maintenance Yard Facility,Located at <br /> 1804 West Main Street,Stockton,CA. <br /> Dear Ron: <br /> L&S Environmental(LSE)proposes to abandon a total of nine wells at the above subject site. Gregg Drilling <br /> -of Martinez will provide drilling services and LSE will provide oversight and closure documentation. <br /> The wells will be abandoned by pressure grouting methods and will conform to San Joaquin County <br /> Standards. Each well will be filled with neat cement using a tremie pipe until it flows from the surface. Once <br /> the well column is full,grout will be applied to the well under pressure. A fitting will be securely attached to <br /> each wellhead and connected to the Chemgrout pump. A continuous pressure of 30 to 45 psi will be <br /> maintained on the wellhead for approximately five minutes to force grout into the filter pack and surrounding <br /> formation. <br /> Once the wells have been sealed the top three feet of casing will be exposed by removing the traffic box and <br /> surrounding soil. The casing will cut off and the exposed end will be capped with concrete and mounded the <br /> prevent ponding of water. The grout and cement will be allowed to setup and if no further settling occurs,the <br /> remaining borehole will be`filled with soil cuttings. <br /> Please let me know if you have any questions or comments. Drilling is scheduled for March 27. <br /> Respectfully, <br /> L&S Environmentid <br /> / ott Parker,RG. � PAYMENT <br /> Principal Geologist � �.a -g� <br /> MAR 2 4 1998 <br /> SAN JOAQUIN COUNTY <br /> PUBLIC HEALTH SERVICES <br /> ENVIRONMENTAL HEALTH DiVISIC;j <br /> P.O. Box 737 • Suisun,CA 94585 • 707.427.2079 • FAX.707.425.5441 <br />