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•13 January 2015 AGE Project No. 15-3595 Page 2 of 4 following: • The collection of soil samples at the inlet and outlet of each clarifier to determine if any subsurface impact has occurred from the operation of the clarifiers. • Shallow sampling in the area of the oil stained soil along the Interstate Trucking/Delta Bluegrass property boundary to determine the extent of the impacted soil. In December 2015, soil was excavated to 20 inches below surface grade (bsg) at the Delta Bluegrass property near the Interstate Trucking property boundary in the area of the stained soil. The affected soil was excavated and removed from the site under the supervision of the San Joaquin County Environmental Health Department. AGE has still recommended advancing one soil boring along the Interstate Trucking/Delta Bluegrass property boundary to a depth of five (5) bsg to determine if the extent of impacted soil has been defined. Based on the RECs, AGE has prepared the following work plan to investigate shallow soil at the site. Procedures for soil sample collection are described in detail below. SCOPE OF WORK AGE proposes to advance a total of seven (7) soil borings at the site; five (5) soil borings will be advanced at 825 Navy Drive (APN: 163-260-35) and two (2) soil borings will be advanced at 1137 South Stockton Street (APN: 163-260-22). Soil borings will be advanced in the areas of the three oil -water separators/clarifiers to depths of approximately ten (10) feet bsg for collection of soil samples at 5 feet and 10 feet bsg and along the Interstate Trucking/Delta Bluegrass property boundary to a depth of approximately five (5) feet bsg for collection of a soil sample at 5 feet bsg. Proposed soil boring locations are depicted in Figure 2. Proposed soil borings will be advanced using either a Geoprobe 5400 direct -push probing unit, a PowerProbe 9600 direct -push probing unit, or a two-inch diameter steel hand auger. Soil samples will be submitted to a California Department of Public Health (CDPH)- Certified laboratory and will be analyzed for: • Total petroleum hydrocarbons (TPH) in accordance with EPA -method 8015 - modified; and Volatile organic compounds (VOCs) in accordance with EPA Method 82608. Advanced GeoEnvironmental, Inc.