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Soil Sampling for Private Properties Proposed for Partial Acquisition Eight borings (B17 to B24) will be advanced at or adjacent to private properties proposed for partial acquisition using hand auger and/or direct-push drilling methods. Soil samples will be collected at depth intervals of 0 to 0.5 ft and 1.5 to 2.0 ft at each location. Proposed boring locations are depicted on Exhibit 1. Completed soil borings will be backfilled with the soil cuttings. Soil Sampling at Proposed Borrow Area Four borings (B25 to B28) will be advanced at the proposed borrow area using hand auger methods. Soil samples will be collected at depth intervals of 0 to 0.5 ft, 1 to 1.5 ft, 2 to 2.5 ft, and 4 to 4.5 ft at each location. Proposed boring locations are depicted on the Right-of-Way Impact Map. Completed soil borings will be backfilled with the soil cuttings. Sampling Methods Sampling equipment will be cleansed between each sample location by washing the equipment with an AlconoxTM or LiquinoxTM solution followed by a double rinse with deionized water. Decontamination water will be disposed to the ground surface within the Caltrans right-of-way in a manner not to create runoff,away from drain inlets or potential water bodies. Samples will be collected in resealable polyethylene bags, laboratory supplied glass jars, stainless steel sample tubes, or acetate liners depending on sampling method. The sample containers will be sealed, labeled, placed in an ice-filled cooler, and transported to a Caltrans-approved, certified environmental laboratory using standard chain-of-custody documentation. Quality Assurance/Quality Control Procedures Quality assurance/quality control (QA/QC) procedures will be performed during the field activities. These procedures will include decontamination of sampling equipment before each sample is collected and providing chain-of-custody documentation for each sample submitted to the laboratory. The borings will be backfilled with the excess soil cuttings or with neat cement grout.The decontamination water will be discharged to the ground surface away from surface water bodies or storm drain inlets. Project Personnel Mr. Richard Day, a Professional Geologist (PG), will manage the project. Field activities will be performed by Geocon staff certified by the Occupational Safety and Health Administration (OSHA) 40-Hour HAZWOPER regulation. Mr. Day will provide recommendations regarding soil sample results and associated reuse/disposal options. Project No.E8504-06-01 -6- July 13,201 1