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r 5 Soil borings will be manually excavated to a depth of approximately 5 feet bgs to locate and avoid subsurface piping and utilities. Proposed borings B1 through B4 will be drilled to final depths of ' approximately 40 feet bgs or 10 feet below last detected concentrations of petroleum hydrocarbons with a limited access,hollow stem auger drilling rig. Soil samples will be collected from each boring at 5-foot depth intervals from 5 feet bgs to the bottom of each boring. Soil samples will be screened in the field for undifferentiated volatile organic compounds using an organic vapor analyzer and submitted to an on-Site mobile laboratory for analyses. Field procedures are discussed in greater detail in Appendix C.All drilling and soil sample collection procedures will be performed under the direction of a State-Certified Engineering Geologist in accordance with applicable regulations and accepted engineering practice and protocol. ' 5.3 Laboratory Analyses Soil samples collected during the investigation will be analyzed for TPH-g and TPH-d in general accordance with EPA Method No. 8015. Additionally,soil samples will be analyzed for BTEX and fuel oxygenates in general accordance with EPA Method No. 8260B. The laboratory analyses will be performed on-Site by a State-certified environmental testing, mobile laboratory. 5.4 Soil and Water Disposal Soil generated during the conduct of drilling operations will be stored on Site under plastic. Soil will be disposed of at a thermal desorption facility within 90 days of the termination of field activities. Water generated during the steam cleaning of the augers will be placed in 55-gallon drums.The wash ' water will be sampled and profiled for disposal at a state certified recycling facility.The wash water will be disposed of at a state certified recycling facility within 90 days of generation. ' 5.5 Data Evaluation and Reporting The results of the field investigation will be evaluated and interpreted in context with the existing ' on-Site soil conditions and the hydrogeologic setting. A report describing our findings will be prepared and submitted to Ryder and the SJCEHD. ' 6.0 SCHEDULE FREY is prepared to commence scheduling of field activities upon approval of this workplan by the ' SJCEHD. It is estimated that one to one and a half days will be required to complete drilling and laboratory analyses activities. A written report describing the results of the subsurface investigation will be submitted to the SJCEHD approximately four weeks after the completion of the field activities.