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FINAL SITE 47 SOIL SAMPLING WORK PLAN PORT OF STOCKTON-ROUGH AND READY ISLAND,CALIFORNIA 3. PROJECT DESCRIPTION 3.1 TASK 1: PERMITTING, UTILITY CLEARANCE, AND HEALTH AND SAFETY PLAN As described below, drilling activities are planned at Site 47. Therefore, appropriate permits for these activities will be acquired from San Joaquin County Environmental Health Department (EHD). Underground Services Alert (USA) will be notified to clear the proposed drilling locations for underground activities. The proposed drilling locations are contingent upon access limitations (e.g. site features, utilities) and final locations may be moved to the closest accessible location. As required by the Occupational Health and Safety Administration (OSHA) 29 CFR 1910.120, Hazardous Waste Operations and Emergency Responses, a site Health and Safety Plan (HSP) prepared for drilling operations will be read and approved by the Project Manager, and the On- Site Safety Officers of all subcontractors working at the Site. 3.2 TASK 2: SOIL SAMPLING Ten borings will be advanced using a direct push drilling rig. Two-inch diameter steel tubes fitted with removable clear plastic sleeves will be hydraulically pushed or hammered into soil. Once the desired depth is reached, the probe is retracted and the soil-filled sleeve is removed and split open so that the soil within can be sampled. The ten borings will be advanced at the approximate locations shown on Figure 2. Each probe will be driven to a depth of five feet bgs or first ground water as indicated by saturated soil, whichever is deeper. The soil cores recovered will be logged by a registered Professional Geologist and assigned a soil type according to the Unified Soil Classification System(USCS). Samples from each soil core recovered will be preserved for laboratory analysis at the following intervals: one from the surface to 0.5 feet; 1.5 to 2 feet; 2.5 to 3 feet; and 3.5 to 4 feet. If unsaturated soil is encountered at a depth greater than 5 feet, samples will continue to be collected at one-foot intervals until saturated soil is encountered. Soil samples will be sent to Curtis and Tompkins, a State-certified laboratory and analyzed for arsenic using EPA Method 6010. Representative samples will also be submitted to a geotechnical laboratory for grain-size analysis in accordance with American Society for Testing and Materials (ASTM)Method D422. All soil cores will be retained for at least 60 days. Upon completion of the sampling, the borings will be grouted under the supervision of a San Joaquin EHD inspector. Neat cement grout will be installed using a tremie pipe to roughly 3 feet bgs and backfilled with native soil. March 2015 3 Environmental Risk Services n r Corporation