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19002/0 13 <br /> Department of Toxic Substances Control <br /> Nan C.Uoyd.PhA. 8s00 Cal Center Drive Araoid scrmerranggeer <br /> AgancySwe" Sacramento,Cailtornla 95826-3200 Govow <br /> CaVEPA <br /> February•$, 2005 <br /> Mr.Tracy Sizemore <br /> ConcocoPh!flips <br /> 1500 North Priest <br /> DC-40A <br /> Tempe,Arizona 85281 <br /> Mr.Thomas Bauhs <br /> Chevron Texaco Environmental Management Corporation <br /> P.O. Box 6012 <br /> San Ramon, California 94583-0804 <br /> HEALTH RISK'ASSESSMENT DATA NEEDS PRIOR TO SOIL VAPOR EXTRACTION <br /> SYSTEM STARTUP,AND OVERALL HEALTH RISK ASSESSMENT DATA NEEDS <br /> SYSNOPSIS, L&M OU, STOCKTON, CALIFORNIA <br /> Dear Mr. Sizemore and Mr. Bauhs: <br /> The Department of Toxic Substances Control(DTSC) Human and Ecological Rlsk <br /> Division(HERD)has completed a synopsis of the comments contained In their <br /> memorandum dated'September 9,2004,to assist with progressing towards an ' <br /> acceptable Health Risk Assessment(HRA), HERD's synopsis and Data Gaps table is, <br /> attached to the enclosed memorandum dated February 2, 2005(enclosure). Based <br /> upon a meeting held on January 5,2005 with Regional Water'Quality Contra) Board <br /> staff, DTSC has identified below a subset of the data needs identified in the.enelpsed <br /> February 2.2005 HERD memorandum that should be addressed prior to the startup of . <br /> the Soil Vapor Extraction (SVE)system planned for the Deftal Vieinr Apartments <br /> (formerly known as Delta Gateway Apartments).and startup of tate SVE system in the ' <br /> undeveloped afea of the L&.M CU. <br /> ADDITIONAL DOCUMENTATION/DATA-NEEDED prior to SVE system startup: <br /> •' Bullet 1 from enclosed memorandum for the Delta View Apartment area. If <br /> -underground utility information Is available based upon'installation of the SVE <br /> system under the apartment area,It should be provided. DTSC recommends <br /> contacting the City of Stockton Department of Public Works for Wrrent.maps <br /> depicting locations of underground tAlities such as sewer and water pipes, <br /> ® Printed on Regded•Pepor <br />