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Proposal 10-005 Phase II ESA and Remedial Action/San Joaquin County,CA October 14,2005 sample will be collected from each boring using disposable Teflon bailers, which will be carefully decanted into laboratory supplied containers. The containers will be sealed, checked for headspace, labeled and placed into a pre-chilled ice chest for temporary storage. At least two soil and one groundwater samples per boring will be submitted under chain-of-custody documentation to a State-certified hazardous waste testing laboratory for analysis. The soil and groundwater samples will be analyzed for TPHg, TEPH, TOG, BTEX and MTBE using EPA Methods 5030/8021, 8015 (modified)and 8260. The locations of the borings will be marked on a Shea Homes supplied map. If petroleum contamination is observed and/or noted within any boring advanced near a pipeline, the lateral and vertical extent of petroleum-hydrocarbon contamination within the subsurface soil and groundwater, generated from the pipeline, must be evaluated by drilling an additional three borings perpendicular from the initial boring. Each set of three additional borings will be advanced at 50-foot centers away from the initial boring in which contamination was observed and/or noted. The sets of three borings will also be drilled and groundwater and At least two soil and one groundwater samples per boring will be submitted °under chain-of-custody documentation to a State-certified hazardous waste testing laboratory for analysis. The soil and groundwater samples will be analyzed for TPHg, TEPH, TOG, BTEX and MTBE using EPA Methods 5030/8021, 8015 (modified)and 8260. The locations of the borings will be marked on a Shea Homes supplied map. We anticipate that 20% of the initial boE swill require additional delineation (up to 4 borings). Shea Homes will only be billed for perfo - rk. If no additional borings are needed, then no additional costs will be accrued or billed. Each set of drilling rods will be steam-cleaned between borings and the rinsate water will be left on-site pending laborato Once sam _ g activities are'completed, each boring will be backfilled with neat cem nt to gr e,. Reporting The field findings and laboratory analytical results of Neighborhood C Phase II ESA will be compiled into a report detailing field methods, results, and conclusions of the investigation. Based on the results and conclusions of this work, recommendations for additional work (if necessary) will also be presented in the report. The report will be signed and sealed by a California Certified Engineering Geologist and submitted to you draft for review prior to being finalized with corrections. PREPARATION OF RAW AND CONSULTATION WITH DTSC Based on the findings and conclusions reported for the Neighborhood C Phase II ESA, TERRASEARCH, inc. will prepare a Removal Action Workplan (RAW) to be submitted to the California Department of Toxic Substances and Control (DTSC) for review and approval prior to conducting remedial actions on the property. This will require Shea Homes to enter into a Voluntary Cleanup Agreement(VCA)with the DTSC and will require a$50,000.00 payment to the DTSC to review the RAW and oversee the cleanup of Parcel C. TERR4SEARCH, inc. Page 5