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GEOSYNTEC CONSULTANTS <br /> ' Ms. Amy Terrell <br /> 5 October 2004 <br /> Page 7 <br /> the surface. After collecting the groundwater sample, solid PVC pipe will be <br /> connected to the slotted pipe at the bottom of the Hydropunch rods and the <br /> Hydropunch rods will be retracted. The hole will be tremmie grouted to the <br /> surface by pumping bentonite grout down the PVC pipe while retracting the <br /> pipe. <br /> Grab groundwater samples collected with a Geoprobe will follow the procedures <br /> described in December 2003 Downgradient Delineation Report. <br /> ' Analytical Plan <br /> Grab groundwater samples collected in South Stockton Street will be analyzed for <br /> total oxidizable nitrogen to investigate the extent of nitrate downgradient of MW-5. <br /> The remaining groundwater samples will be analyzed for the same constituents required <br /> M by the site Monitoring and Reporting Program No. R5-2004-0806. Groundwater <br /> samples will be handled under standard chain of custody procedures. Depending upon <br /> the amount of groundwater capable of being removed from the deep CPT hole, the <br /> ' sample will be analyzed by the following analytical methods, in order of priority: <br /> Volatile organic compounds, including 1,2-DCP by EPA Method 8260 <br /> • 1,2,5-TCP using Low Level GC/MS to obtain a detection limit of 0.005 ug/L <br /> ' Chloride, sodium, and total dissolved solids <br /> • Total oxidizable nitrogen using EPA Method 353.2 <br /> • Carbamate/urea pesticides using EPA Method 8321. <br /> ' Reporting <br /> The work described in this work plan will be reported to the RWQCB in the next <br /> semi-annual report due after completion of the work. The information reported will <br /> include: installation, development, and initial monitoring results of new monitoring <br /> well (s); procedures and results deep on-site CPT/grab groundwater exploration; <br /> • P:\PRJ2003REWWilbur-Ellis\WrO25O(JTF)\STOCKTON\S I.F Oct 2004 Work Plan\Oct 04 Work Planb.doc <br /> rk <br /> - � RECYCLED AND RECYCLABLE <br />