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Exhibit A Multi-Modal Station/Shopping Center Phase II ESA Page 6 contamination at the properties. Soil samples will be collected from 4, 8, and 12 feet bgs at each boring. The three boreholes completed to approximately 75 feet bgs will be left open during the day to collect depth-to-groundwater measurements once the groundwater has stabilized. The three soil samples collected from each boring will be composited and analyzed for VOCs by EPA Method 8260. Apparent contamination will introduce the need for additional borings estimated at 20% of the original number. Contamination noted in the laboratory results will require discrete soil sample analysis at approximately 20% of the borings. The discrete soil samples will be analyzed for VOCs by EPA Method 8260, semi-VOCs by EPA Method 8270, and total petroleum hydrocarbons by EPA Method 8015M. In addition, each of the discrete soil samples taken from a depth of four feet bgs will be analyzed for LUFT-5 metals by EPA Method 6010B. Groundwater samples will be analyzed for VOCs by EPA Method 8260. Visually apparent contamination will introduce the need for additional borings estimated at 10% of the original number of borings to approximately 75 feet bgs. Analyses will be conducted at an off- site laboratory. Subtask 6 — Block 6 Borings Seven soil borings will be completed on the site designated Block 6. Three borings completed to 12 feet bgs and one to approximately 75 feet bgs will be installed at 915 E. Weber Avenue. One boring to 12 feet bgs and one to approximately 75 feet bgs will be installed at 931 E. Weber Avenue. One boring completed to approximately 75 feet bgs will be installed at 128 N. Aurora Street. Groundwater and soil samples will be collected to help assess the potential contamination at the properties. Soil samples will be collected from 4, 8, and 12 feet bgs at each boring. The three boreholes completed to approximately 75 feet bgs will be left open during the day to collect depth to groundwater measurements once the groundwater has stabilized. The three soil samples collected from each boring will be composited and analyzed for VOCs by EPA Method 8260. Apparent contamination will introduce the need for additional borings estimated at 20% of the original number. Contamination noted in the laboratory results will require discrete soil sample analysis at approximately 20% of the borings. The discrete soil samples will be analyzed for VOCs by EPA Method 8260, semi-VOCs by EPA Method 8270, and total petroleum hydrocarbons by EPA Method 8015M. In addition, each of the discrete soil samples taken from a depth of four feet bgs will be analyzed for LUFT-5 metals by EPA Method 6010B. Groundwater samples will be analyzed for VOCs by EPA Method 8260. Visually apparent contamination will introduce the need for additional borings estimated at 10% of the original number of borings to approximately 75 feet bgs. Analyses will be conducted at an off- site laboratory. TASK E Subtask 1 — Waste Disposal Transport and disposal of all 55-gallon drums will be arranged. It is assumed that a total of 12 drums will be need to be disposed of at the Chemical Waste Management facility in Kettleman City, California. Following soil analyses, it may be found that the drums of soil can be disposed of at Forward Landfill in Manteca, California at a lower cost.