Laserfiche WebLink
N <br />`I <br /> Mc Nuel Henderson., Jr., SJCEHD June 27, 2005 <br /> Former Apache Plastics Facility, Stockton, CA Project No. 2005-2050-01 <br /> ii Well Installation and Destruction Letter Report <br /> Page 3 <br /> locking cap was placed on the top of the well casing. Well details and DWR well completion <br /> reports for each monitoring well are included in Appendix A. <br /> Well Destruction <br /> Well MW- 12 was pressure grouted with neat cement on March 30, 2004. The traffic rated <br /> vault box covering well MW42 was removed, and the upper 3 feet of the well casing was <br /> overdrilled using an 8-inch diameter hollow stem auger. The DWR well destruction notice <br /> for MW- 12 is included in Appendix A. <br /> Monitoring Well Development and Redevelopment <br /> p Stratus oversaw Woodward Drilling Company redevelop well MW-8 on March 30, 2004. <br /> Well MW-8 was re-developed by surging and bailing. Approximately 1 .5 feet of sediment <br /> were removed from the well casing during re-development activities. <br /> Stratus developed wells MW- 15 through MW- 18 on April 15, 2004 by surging with a plastic <br /> bailer, followed by groundwater pumping. Stratus removed approximately 3 to 10 well casing <br /> volumes during well development activities. Well MW- 17 pumped dry during development <br /> activities. Field data sheets documenting the development activities are provided in <br /> Appendix B. <br /> Monitoring Well Sampling <br /> Wells MW- 15 through MW- 18 were incorporated into the ongoing monitoring program for the <br /> site during the second quarter 2004. Four sampling events have been completed to date. Prior <br /> to sampling, approximately 3 well casing volumes were purged from each well. Samples were <br /> collected from each well using a new plastic bailer. The groundwater was subsequently <br /> transferred to laboratory supplied glass vials (voas) and stored in an ice-chilled cooler. Strict <br /> chain-of-custody procedures were followed from the time the samples were collected until the <br /> time the samples were relinquished to the laboratory. <br /> Waste Management <br /> Soil cuttings were stockpiled on, and covered with, plastic sheeting and stored onsite pending <br /> disposal. Rinseate water generated during drilling was placed in DOT-approved 55-gallon <br /> steel drums and stored on-site pending disposal. Integrated Wastestream Management of <br /> Milpitas, California, transported the soil cuttings and drummed wastewater to licensed facilities <br /> for disposal. Stratus transported the other purged groundwater generated during the well <br /> development and sampling events to a licensed facility for disposal . <br /> MApache Plastics\Reports\Apache-well-install-destruct-letter repori.doc <br />