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26 July 2002 <br /> AGE-NC Project No. 97-0326 <br /> Page 6 of 10 <br /> Ground water monitoring and sampling of each newly installed ground water monitoring well will <br /> be conducted on a quarterly basis.Procedures for ground water sampling and analysis were described <br /> in Section 4.4. <br /> 3.3. REPORT PREPARATION <br /> Following completion of the proposed scope of work, a report will be prepared presenting the <br /> findings. The report will include a description of work performed and the results of the soil/ground <br /> water sampling and analysis.Conclusions and recommendations will also be included in the reports, <br /> if applicable. The report will be in a format acceptable to Central Valley Regional Water Quality <br /> Control Board(CVRWQCB)guidelines,and will be reviewed and signed by a California Registered <br /> Geologist. <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures for well installations,well development,aquifer pumping test and <br /> in-situ ozone sparging are described below. <br /> 4.1. DRILLING AND SAMPLING <br /> Soil borings for installation of ground water monitoring wells will be advanced utilizing a truck- <br /> mounted, hollow-stem drill rig and 8-inch diameter hollow-stem augers. The soil boring will be <br /> advanced to a total depth of 48 feet bsg for single-level wells and 150 feet bsg for multi-level wells. <br /> Soil cuttings generated during drilling activities will be placed on and covered with plastic sheeting; <br /> rinseate will be containerized in properly labeled DOT-approved 55-gallon drums,and stored on-site <br /> in an area lacking public access.Disposal alternatives for rinseate and stockpiled soil will be selected <br /> based on results of a laboratory analysis. <br /> Soil samples will be collected at five-foot intervals, beginning at a depth of 5 feet bsg, using a <br /> California split-spoon sampler loaded with three 2-inch by 6-inch brass sleeves. The sampler will <br /> be driven by dropping a 140-pound hammer from a height of 30 inches. The number of blows <br /> required to advance the sampler in 6-inch increments will be recorded on the boring log. Upon <br /> removal from the sampler, the ends of the lead sample sleeve will be covered with Teflon sheets, <br /> capped and sealed with tape. Each preserved sample sleeve will be labeled with the boring location, <br /> depth, time and date. Appropriately sealed and labeled samples will be placed on ice in a chilled <br /> container and transported under chain-of-custody procedure to a DHS-certified laboratory. <br /> Advanced GeoEnviron mental,Inc. <br />