ARCHIVED REPORTS_DTSC APPROVAL LETTER

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C. Assessor's Parcel Numbers : The 61 -acre site consists of San Joaquin County Assessor's Parcel Number 262-020-08 and a portion of the following APN numbers as shown on the attached Figure 1 : 262-020=03 , 262-020-07, 262-020-091 262-020-17, and 262-020- 19 as well as a 2 . 745- acre portion of Great Valley Parkway lying North of Grant Line Road and South of Mascot Boulevard (AKA - Mustang Way) as shown on San Joaquin Subdivision Map recorded as Tract No . 3649 . 4. Responsible Parties : Mountain House Developers, LLC. (Shea Homes) 19855 W . Grant Line Road Mountain House , California 95391 Attn : C. Blaine Peterson , the President Peterson M . Bridges , Senior Vice President 5. Brief Description and History of the Site : The Site is located at 19855 W . Grant Line Road in the southern portion of Neighborhood C of Mountain House, The 61 -acre site consists of San Joaquin County Assessor's Parcel Number 262-020-08 and a portion of the following APN numbers 262-020-035 262-020-07, 262-020-091 262-020-17 , and 262-020-19 as well as a 2 . 745- acre portion of Great Valley Parkway lying North of Grant Line Road and South of Mascot Boulevard (AKA - Mustang Way) as shown on San Joaquin Subdivision Map recorded as Tract No . 3649 , and is located at 19855 W . Grant Line Road , Mountain House , San Joaquin County, California . The total Site is approximately 61 acres but only a 2 . 745-acre portion of the property is subject to a land use covenant because of elevated concentrations of dieldrin in soils from former agricultural activities . The land uses of surrounding properties are agricultural and residential . Properties to the south and southeast of the Site across and along Grant Line Road are rural residential. Properties west, north , and northeast of the Site are used for agricultural purposes, and the north/northeastern properties are scheduled for residential development. On June 5 , 2007 , Shea Homes entered into a Voluntary Cleanup Agreement (VCA) with DTSC for the purpose of determining the extent of the property's existing hazardous substance contamination and to conduct appropriate remedial measures to allow for future unrestricted use of the property. The Site has been investigated and remediated under the Department's oversight. The Property was remediated in accordance with a Removal Action Workplan ( RAW) pursuant to Chapter 6 . 8 of Division 20 of the California Health & Safety Code ( H &SC) . Because the organochlorine pesticide dieldrin , a hazardous substance as defined in H &SC section 25316 , remains in the Site soils at concentrations ranging from non- detect to 0 .340 milligrams per kilograms (mg/kg ) that are above concentrations acceptable for an unrestricted land use and encapsulated in an internment cell beneath the Great Valley Parkway Roadway, a land use covenant is required for this 2 . 745-acre area portion of the property. The RAW identified that a deed restriction would be 2