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AEI Project No. 306556 April 6, 2012 Page 3 of 4 Drilling and Soil Sample Collection The scope of work proposed consists of the drilling and logging of a total of two (2) borings (SB-1 and SB-2) at the property (Figure 3). The selected drilling contractor will hold a California C57 driller's license. Soil borings will be advanced with a truck mounted direct-push drilling rig. The proposed boring locations, depths, and sample collection will be based on the potential subsurface impact of the former fuel dispensing operations. The locations of the borings will be based on the geophysical survey and/or the utility survey findings, particularly if underground utilities are identified within the drilling areas and based on site access issues. The borings are planned to be advanced to depths between 15 and 20 feet below ground surface (bgs). Soil in the shallow borings will be continuously collected in liners within the sampling barrel from which a 6-inch sample will be collected at appropriate depths. The sample will be sealed with Teflon tape and plastic end caps. The soil borings will be logged using the Unified Soil Classification System. A photo ionization detector (PID) will be used to screen soil samples in the field and the PID readings for each sample will be included on the boring logs. Soil samples will be collected at select intervals for possible analysis. Groundwater is expected at approximately 65 feet bgs and will not likely be encountered during this investigation. Boring Destruction Following completion of sample collection and removal of tooling, the borings will be backfilled with neat cement grout per SJCEHD conditions and completed at the surface with concrete to match the surrounding conditions. Laboratory Analysis The soil samples will be labeled and placed into a cooler with ice following sampling. All of the samples will be transferred under appropriate chain-of-custody documentation to a state- certified laboratory. Laboratory analysis of two (2) soil samples will consist of the following: • Total Petroleum Hydrocarbons as diesel (TPH-d) with silica gel by EPA Method 8015M. • Benzene, Toluene, Ethylbenzene and Xylenes (BTEX) by EPA Method 8260. Waste Drill cuttings will be stored onsite in sealed 55-gallon drums, pending the results of sample analyses. Any equipment rinse water will also be stored in 55-gallon drums. Upon receipt of analytical data, the removal and disposal of the waste to an appropriate disposal facility will be recommended.