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kNJ KLEINFELDER ATTACHMENT A SCOPE OF WORK Hydrogeological Services Mariposa Lakes Stockton, California File No.: 02001PROP.ENV/ST05P346 December 2, 2005 INTRODUCTION Kleinfelder is pleased to present this proposal to Mr. Lynn Sutton of PCCP Mariposa Lakes, LLC (PCCPML). This proposal was developed based on a conversation with Mr. Sutton regarding the need to: 1) Develop hydrogeological information about the subject site; 2) characterize the shallow groundwater levels, flow direction and quality; 3) assess the possibility of developing a non-potable water supply for make-up water for the on-site water features, 4) and aid in the development of a water conservation plan and integrated water management plan for the development. Kleinfelder is committed to providing quality service to its clients, commensurate with their wants, needs and desired level of risk. If a portion of this proposal does not meet the needs of PCCPML or if those needs have changed, Kleinfelder will consider appropriate modifications, subject to the standards of care to which we adhere as professionals. Modifications such as changes in scope, methodology, scheduling, and contract terms may result in changes to the risks assumed by PCCPML as well as adjustments to our fees. SCOPE OF WORK TASK 1 —REGULATORY AGENCY FILE REVIEW The goal of conducting the file reviews is to assess the available data for the existing wells on the site and assess the PCE/TCE contamination plume emanating from the Austin Road Landfill (ARL). The evaluation will include the most current and readily available information concerning the horizontal and vertical extent assessment of the contamination, remedial activities, and effectiveness of the remedial activities at the landfill. Kleinfelder will attempt to locate and review individual well logs from the existing wells within the site boundaries. Initially, a request should be made of the individual well owners to determine if they have well logs available. We will also request, on behalf of the well owners, from the State of California Department of Water Resources (DWR) to review the available drilling logs from within the project site boundaries. We will attempt to have the City of Stockton request as the municipality requiring the review facilitates the review process. The DWR will not release well logs to individuals requesting a review. 02001PR0P.ENV/ST05P346R/JDZ:Iv Page 1 of 12 ©2005 Kleinfelder, Inc. December 2, 2005