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Work Plan—PEA Page 10 Former Haley Flying Service GPE Project 474.2 texture, composition, hardness, moisture content, and post-depositional changes that have occurred in the sediments). Upon reaching a depth adequate to obtain a suitable groundwater grab sample, the hollow drill rods are removed from the boring, and replaced with a length of 1/2 inch PCV tubing with the lead 4-foot section being screened, thus creating a temporary well. A length of new, dedicated Teflon tubing fitted with a check valve is inserted inside of the PVC tubing and the oscillated to produce a stream of groundwater at the surface. The water is transferred directly to laboratory-supplied sample containers. Each sample will be stored in a 1-liter amber glass bottle provided by the laboratory. Each sample container will then be labeled and immediately transferred to a cooler chilled with water ice for transport to the laboratory under chain-of- custody. After collecting the final sample, each boring will be filled to grade with Class G neat cement. Upon retrieval, each groundwater sample will be transported to Argon Laboratories of Ceres, CA for analytical testing as follows: • Organophosphorous herbicides and pesticides by EPA method 8141A, • Chlorinated Herbicides by EPA method 8151A and, • N-methyl Carbamate pesticides by EPA method 8318. • Organochlorine pesticides by EPA method 8081A The specific chemicals and their reporting limits are listed in the tables of Appendix B. General chemical characteristics such as acidity/alkalinity, electrical conductivity, dissolved solids content will not be requested, as this information is only valid for developed monitoring wells. 2.1.4 Waste Disposal Decon water will be containerized in appropriate DOT containers for later recycling by a licensed hazardous waste hauler. No waste soil cuttings will be generated during the Geo- Probe drilling process or shallow soil sampling. 2.1.5 Documentation A general field log will be maintained during the field work. Notes will be made of the date and time of the work, the personnel on site, the general weather, and the sequence and time of significant field events. Careful notes will be taken of each shallow sample collected for laboratory analysis. The shallow soil samples will be accompanied by a log form (Figure 5) describing the sample as well as sample location and time. All of the field notes will be maintained in a notebook. The two Geo-Probe soil borings will be logged as described above. An example copy of the boring log form is attached as Figure 4. Photographs will supplement the log information. General site photos will be made that show the overall site and the 2937 Veneman Avenue, Suite B240 Geo-Phase Environmental Inc. Phone: (209) 569-0293 Modesto, Ca 95356 Fax: (209) 569-0295