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1 Proposal for Limited Site Investigation Irerracon Accurate Air Engineering, Inc. a Lodi, California August 18, 2011 a Terracon Proposal No. 60110154 Alconoe detergent wash and potable water rinse prior to commencement of the project and between collections of each sample. Soil samples will be collected continuously using 4-foot samplers and single-use acetate liners to document lithology, color and relative moisture content. In addition, the samples will be field screened using sensory methods and a photoionization detector (PID) to detect the presence of total organic vapors (TOVs). Following completion of sampling activities, the borings will be closed in place in accordance with applicable state regulations and guidelines. In the event there are no applicable state regulations or guidelines, the soil borings will be backfilled with bentonite pellets, then hydrated and grouted to the surface. Soil Vapor Samples A total of three soil vapor samples will be advanced using a hydraulic push rig through the warehouse floor (SV-1 and SV-2 to proposed depth of five feet bgs), and a "stepped-out" or off- set soil gas boring SV-4 in the vicinity of B-3. Subsequent to completion of drilling activities, the borings will be converted to soil gas vapor probes at 5 feet bgs. The total boring depths will not be exceeded without verbal approval from the client. Terracon's soil gas sampling program will follow the "Active Soil Gas Investigation-Advisory" guidelines published by Department of Toxic Substance (DTSC) and Los Angeles Regional Water Quality Control Board (LARWQCB), January 28, 2003. The sampling, the decontamination procedures, and the surface completion will be similar to the procedures described in the soil borings above. Investigation Derived Waste (IDW) Loading, Transportation and Disposal Following completion of the LSI, it is estimated that one 55-gallons Department of Transportation (DOT) approved drums containing soil, groundwater, and/or equipment cleaning water will be generated as a result of the investigation activities. Pending the results of the laboratory analyses, the investigation derived waste (IDW), will be stored temporarily onsite in these appropriately labeled 55-gallon. The drum labels will identify the apparent contents of the drum and the initial accumulation date. Transportation and disposal of removed soil cuttings and/or development water and other waste materials are out-of-scope services and not included in this proposal. Terracon anticipates ggneratinpFl�ppr�oxi,mately five drgms of Soil, grQundw ter, a_r� equipment cleaning, water , during the LSI activities. Terracon would be pleased to provide a separate proposal for transportation and disposal services once a final volume of waste is determined. Given the site location and conditions, and based upon prior experience, Terracon estimates that the costs for disposal'wili'be'approximately as follows: (i) analytical results for'di'sposal is $110/sample'(ii) 3 Reliable s Responsive ■ Resourceful