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Work Plan—PEA Page 7 Former Haley Flying Service GPE Project 474.2 monitored on a quarterly basis until it is determined that some other monitoring schedule is appropriate. The groundwater samples from each well will be submitted to Severn Trent Laboratories of Pleasanton and tested for the presence of organo-chlorine pesticides by EPA method 8081 B and such other tests as may be deemed appropriate. 2.9 Waste Disposal Decon water will be containerized in an appropriate DOT container drum for later recycling by a licensed hazardous waste hauler. No soil cuttings will be generated during the Geo- Probe drilling process. Approximately five drums of soil cuttings generated during the hollow stem auger drilling process will be profiled to determine the appropriate disposal method. If the soil is determined to contain pesticides, it will be stockpiled on the site to be treated along with the pesticide-impacted shallow soil. 2.10 Documentation Field documentation procedures are described in the original Work Plan. 2.11 Quality Assurance / Quality Control See Section 2.2 of the original Work Plan for a general discussion of QA/QC methods and protocols. For the work described in this addendum, a trip blank prepared by the analytical laboratory will accompany the sample storage containers throughout the sample collection process, and will be returned to the lab for analysis along with the water samples collected in the field. An equipment blank will be collected in the field prior to collecting the final groundwater sample. A split replicate of one of the groundwater samples will be tested using the same procedures as the other samples. 2.12 Health and Safety Plan See Appendix A of the original Work Plan for the Health and Safety Plan. 2937 Veneman Avenue, Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293 Modesto, Ca 95356 Fax: (209) 569-0295