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■ Geotechnical Inc <br /> ami <br /> C <br /> M <br /> cc L <br /> October 16, 2006 <br /> Kimball Hill Homes <br /> Attention: Armando Moreno <br /> 9355 East Stockton Boulevard, Suite 100 <br /> Elk Grove, CA 95624 <br /> DRAFT <br /> PRELIMINARY ENDANGERMENT ASSESSMENT <br /> CABRAL-MCADAMS PROPERTY <br /> APNs 115-230-06 and 115-230-07 <br /> 4204 through 4208 North Sutter Street <br /> Stockton, California <br /> Raney Reference No. 1828-092.02 <br /> INTRODUCTION <br /> In accordance with your request, we have performed this Preliminary Endangerment <br /> Assessment (PEA) of the subject property. This PEA report has been prepared in <br /> general accord with the State of California Environmental Protection Agency (EPA) <br /> Preliminary Endangerment Assessment Guidance Manual (June 1999 Edition). A <br /> Voluntary Clean-up Agreement (VCA) between the State of California Environmental <br /> Protection Agency, Department of Toxic Substance Control (DTSC) and Mr. Stephen <br /> McAdams (property owner representative) has been established for regulatory oversight <br /> during the PEA process. Our firm prepared a Workplan - Preliminary Endangerment <br /> Assessment report dated September 1, 2006.1 The DSTC indicated approval of the <br /> Workplan in a letter prepared also on September 1, 2006.2 <br /> The subject property is located within a mixed agricultural and residential area of <br /> Stockton, San Joaquin County, California. The subject property has supported rural <br /> residential and farming activities (orchards) for more than 100 years. Laboratory analysis <br /> of soils collected from the subject property has revealed elevated concentrations of <br /> I Raney Geotechnical, Inc.; "Workplan, Preliminary Endangerment Assessment, Cabral-McAdams Property, APNs <br /> 115-230-06 and 115-230-07,4204 through 4208 North Sutter Street,Stockton,California";Raney Reference No. 1828- <br /> 092.02;September 1,2006. <br /> 2 DTSC;"Approval of the Draft Work Plan for the Preliminary Endangerment Assessment of the Cabral—McAdams <br /> Property,Stockton,San Joaquin County,California,95204';September 1,2006. <br /> 3140 BEACON BLVD.—WEST SACRAMENTO,CA 95691 —TELEPHONE 916/371-0434—FAX 916/371-1809 <br />