ARCHIVED REPORTS_XR0004177 - Laserfiche WebLink

Home Browse Search

'Y/ L • WORK PLAN FOR DESTRUCTION OF OFF-SITE GROUNDWATER MONITORING WELL W-6 FOR ARCO FACILITY 434, LODI, CALIFORNIA This work plan has been prepared by Brown and Caldwell on behalf of ARCO Products Company (ARCO) The proposed work is to provide for the destruction of the off-site groundwater monitoring well W-6 in the vicinity of ARCO Station 434, located at 501 West Kettleman Lane, Lodi, California (Figure 1) The well box and the top of the casing of groundwater monitoring well W-6 was destroyed during construction of a Boston Chicken restaurant adjacent to the well The well was relocated by a ground penetrating radar survey performed by a Boston Chicken subcontractor The work plan will be submitted to ARCO, the County of San Joaquin Environmental Health Division (County), and the California Regional Water Quality Control Board (RWQCB) The proper well destruction well permit will be obtained prior to destroying the off-site groundwater monitoring well The Site Safety and Health Plan (SSHP) prepared from a master plan for all northern California ARCO stations with site specific information, dated December 20, 1994, will be followed and retained on-site during the field work (Exhibit A) This work plan describes the methods to be used in the field to destroy the off-site . groundwater monitoring well This plan proposes a project schedule for work at the site and the timely submittal of a site summary report to the County and RWQCB after the completion of this work SCOPE OF WORK This section describes the proposed scope of work for the destruction of off-site groundwater monitoring well W-6 Figure 2 shows the location of well W-6 Monitoring Well Destruction The destruction of the well will be in accordance with County and State well destruction procedures Groundwater monitoring well W-6 is a 2-inch-diameter, flush-threaded schedule 40 polyvinyl chloride (PVC) monitoring well, with approximately 40 feet of riser and 30 feet of 0 020-mch slotted casing (Figure 3) The well will be over-drilled using a truck-mounted drilling rig equipped with 8 25-inch-outside-diameter hollow-stem augers to the bottom of the well, approximately 70 feet below ground surface. If cuttings are generated, the soil will be temporarily placed on plastic sheeting and covered with plastic, separate from the well debris After the well casing, sand pack, transition seal, and grout have been removed by drilling, a • cement-bentonite slurry will be tremied from the bottom of the borehole to the ground surface. { 05J17/9M_\2MS\REP0RMW0RKF"RPT QMS Ps2cw