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Frank C. Alegre Trucking Company, Inc. 4203-F2A Former Trucking Facility January 31, 1997 WORK PLAN FOR POND INVESTIGATION(PHASE ONE) Page 3 Classification System. The soil samples and auger cuttings will be screened in the field using a Thermo Electron 580A photoionization detector (PID), to measure volatile compounds relative to the calibration standard(Isobutylene 100 ppm). Ground-Water Samplin¢ Once the saturated zone has been encountered, the boring will be advanced an additional five feet into the ground-water zone. A temporary 2-inch-diameter PVC casing with a .010 slotted screen, will then be placed withihthe hollow stem auger to facilitate ground-water sampling. The samples will be recovered using a disposable polyethylene bailer. The sample will then be transferred into clean laboratory glassware. The samples will then be transported in a cooled chest under documented chain of custody to the analytical laboratory. Laboratory Analysis The excavation samples will be tested for the following compounds: • Total Volatile and Extractable Hydrocarbons (EPA 80 15) • Total Recoverable Hydrocarbons(EPA 418.1) • Organochlorine Pesticides (EPA 8080) • Volatile Organics (EPA 8270) • Title 22 Metals Soil samples exhibiting pesticides, VOCs or metals in excess of state STLC or federal TCLP standards will be analyzed for soluble fractions. Laboratory services will be provided by American Environmental Network(AEN) in Pleasant Hill, California(DOHS 41172). Report Predation and Data Analysis Following completion of field and laboratory activities, an evaluation of the extent of contaminated materials will be developed. Based on the reported concentrations for the organic/morganic compounds an evaluation of the potential exposure risks and potential ground-water impacts will be developed. Given the results of the initial investigation, recommendations for further characterization and/or monitoring will be provided. Additional phases of work could include exploratory sod borings and ground-water monitoring wells. A final report will be prepared which summarizes the field and laboratory test data, and include conclusions regarding the extent of possible soil contamination associated with the former drainage pond. The report will be prepared and signed by a State of California Certified Hydrogeologist.