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i r <br /> ENVIR&WENTAL SOLUTIO., INC. <br /> June 8, "�I OMME dTAL HEALTH <br /> SENC1~ : Project No. 90-822 <br /> Jerry Wickes 93 JUH 10 pM !: 51. <br /> Environmental Health Specialist <br /> San Joaquin County Public Health Services <br /> P.Q. Box 2009 <br /> 1601 E. Hazelton Avenue <br /> Stockton, CA 95201 <br /> Workplan for <br /> Abandonment of Remaining_Wastewater Line <br /> Santa Fe Railway Company StQcktQn Railyard <br /> 801 Diamond Boulevard <br /> StocktQn. California <br /> Dear Mr. Wickes: <br /> Per our telephone conversation on June 3, 1993, abandonment of the remaining wastewater line <br /> in place at the Stockton railyard as discussed in our letter of May 19, 1993 was approved. This <br /> letter provides the field procedures to be followed during the abandonment of the wastewater line <br /> in place. <br /> The wastewater line is presently in two segments, with the western end of the line isolated from <br /> the southern end of the pipe by a break in the line approximately 120 feet west of the southern <br /> end of the line. The break occured during previous excavation activities, and was temporarily <br /> repaired by capping the ends of the line and backfilling. Prior to grouting the line, the area of the <br /> break will be excavated and riser pipes will be placed on both ends of the line. The two <br /> segments of the line will then be grouted seperately. <br /> Grouting of the wastewater line will be performed by Crisp Construction of Visalia, California. <br /> The line will be grouted using a neat cement grout injected into the line using a cement pump. <br /> The cement grout will be injected into the line until the line is completely filled and grout <br /> extends up into the riser pipe at the opposite end of each segment. Following completion of the <br /> grouting operation, the riser pipes on the ends of the line will be removed below grade and the <br /> excavations will be backfilled to grade. <br /> The acbandonaxent of the wastewater lire is scheduled for June 10, 1993. If you have any <br /> questions or comments, please give us a call. <br /> S' er ly, <br /> effrlyvess .. <br /> Project Manager <br /> cc: Mick Hardin <br /> Tim Lassen <br /> 2815 Mitchell Drive -Suite 103 -Walnut Creels, CA 94598 (510)935-3294-FAX (510)935-5412 <br />