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DEPARTMENTOFTOXIC OC'f 2 0 2007 woa. SUBSTANCES CONTROL ENVIRUidiviElV T HEALTH PUBLIC NOTICE PEWATiSERVICES REMOVAL ACTION WORKPLAN POSTPONEMENT Shea Homes Neighborhood `C' Mountain House, California On August 23, 2007 the California Department of Toxic Substances Control (DTSC)was informed by Shea Mountain House LLC. (Shea Homes)of their intention to indefinitely postpone implementation of the Removal Action Workplan (RAW)to cleanup contamination at the Shea Homes Neighborhood 'C' Site. The Site is a 40-acre agricultural parcel located immediately east of the Alameda-San Joaquin County line, north of Grant Line Road, and about five miles northeast of Tracy, California in the new community of Mountain House. Shea Home's plans to develop the Site property into a residential neighborhood following completion of the environmental cleanup. The RAW was developed by Shea Homes and was approved by DTSC following a complete technical review of the Site documentation. A public comment period was held from July 23, 2007 through August 22, 2007. The RAW was developed to cleanup soil at the Site that has been contaminated with low levels of the pesticide dieldrin from historical agricultural activities. Field investigations indicate that the contamination is limited to the top six inches of soil at the site, and that groundwater beneath the Site has not been affected by the dieldrin contamination. Currently the Site is vacant, as there are no homes or other developments on the property. In addition, the Site property is fenced to prevent public access. DTSC has determined that in its current condition, the fenced and vacant Site does not pose a significant risk to public health or the environment. Therefore, DTSC has informed Shea Homes that they may implement the RAW at the time of their discretion, with the following conditions: • That Shea Homes provide notification to DTSC at least 30-days prior to implementation of the RAW. • That Shea Homes notify the affected community of when the RAW will be implemented by mailing written notification to the DTSC approved Shea Homes Neighborhood 'C' mailing list. The final RAW, and the California Environmental Quality Act Notice of Exemption, which states that implementation of the RAW will not have an adverse impact on the environment, will still be available for public review at the following information repositories.- Mountain epositories:Mountain House Community Services District DTSC File Room 230 S. Sterling Drive, Suite 100 8800 Cal Center Drive Mountain House, California 95391 Sacramento, California 95826 (209)831-2300 (916) 255-3758 Hours: Monday— Friday, 8 a.m. to 5 p.m. Call for Appointment Or online at: www.envirostor.dtsc.ca.gov/public/profile_report.asp?global_id=60000564 If you have any further questions, or wish to discuss the RAW postponement in further detail, please contact Maria Gillette, DTSC Project Manager, at(916)255-3953 or by email at mgillett@dtsc.ca.gov. You may also contact Marcus Simpson, DTSC Public Participation Specialist, at(916) 255-6683; toll free at 1-866-495-5651, or by email at msimpson@dtsc.ca.gov. Members of the media should contact Ron Baker, DTSC Public Information Officer, at(916)324-3142, or by email at rbaker@dtsc.ca.gov.