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Printed on Recycled Paper <br />Department of Toxic Substances Control <br /> <br />Linda S. Adams Maureen F. Gorsen, Director <br />Secretary for 8800 Cal Center Drive <br />Environmental Protection Sacramento, California 95826-3200 <br />r• <br />February 13, 2007 , <br />FEB 4, aa <br />Ms. Kitty Walker <br />Principal Economic Development Analyst <br />Department of Housing and Redevelopment IM9 Redevelopment Division <br />City of Stockton <br />425 North El Dorado Street, Third Floor <br />Stockton, California 95202 <br />Arnold Schwarzenegger <br />Governor <br />SOIL SAMPLING DATA REVIEW, CHILDREN'S MUSEUM OF STOCKTON, STOCKTON, <br />CALIFORNIA <br />Dear Ms. Walker: <br />The Department of Toxic Substances Control (DTSC) has reviewed the Soil Sampling Data <br />and Lead Spreadsheet (Report) dated October 2006. The Report was submitted by Golden <br />State Environmental, Incorporated (GSE) to DTSC on behalf of the City of Stockton. <br />Enclosed is a copy of DTSC's Human and Ecological Risk Division (HERD) memo• <br />containing comments on the risk assessment provided in the Report. Based upon HERD's <br />comments, it is recommended that additional soil sampling is necessary to identify whether <br />elevated Arsenic and Lead levels observed in isolated sample locations are localized. <br />Please provide this office with a figure showing the locations of additional soil samples and <br />a proposed date in advance of any additional site soil sampling field work. All sampling <br />should be conducted in accordance with the previously submitted soil sampling work plan. <br />DTSC also has been in verbal contact with Mr. Rob Traylor Of GSE regarding proposed <br />active soil gas sampling proposed for the site and areas adjacent to the site. DTSC has <br />reviewed and provided a conditional approval of the Active Soil Gas Survey by electronic <br />mail to Mr. Traylor. DTSC requests an advance notice prior any collecting the proposed <br />active soil gas samples. <br />If you have any questions, please contact me at (916) 255-3744 or by electronic mail at <br />Sincerely, <br />Jerry Life <br />Project Manager <br />Enclosure