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Department of Toxic`Substances Control <br /> N <br /> Linda S.Adams Maureen F. Gorsen, Director Arnold Schwarzenegger <br /> Secretary for 8800 Cal Center Drive Governor <br /> Environmental Protection Sacramento, California 95826-3200 r <br /> u u�lr �;�ij= <br /> April 20, 2007 �ltu <br /> APR 4 52001 <br /> Mr. David Stagnaro, AICP ENVIRONMEN i NEAETH <br /> Senior Planner PERMIT/SEROCES <br /> Community Development Department <br /> 345 North EI Dorado Street <br /> Stockton, California 95202-1997 <br /> DRAFT ENVIRONMENTAL IMPACT REPORT (DEIR), MARIPOSA LAKES SPECIFIC <br /> PLAN, STATE CLEARINGHOUSE (SCH #2006022035) <br /> Dear Mr. Stagnaro: <br /> The Department of Toxic Substances Control (DTSC) has reviewed the document described <br /> above that proposes rezoning agricultural property to residential and building residential <br /> housing on the land. The report states that 31 samples were taken randomly over the 3,665- <br /> acre Specific Plan area, analyzed for pesticides, and that the results indicate all chemicals <br /> detected were below their respective Preliminary Remediation Goals. The sample density of <br /> one sample per 118 acres may not be adequate to determine whether residual pesticides <br /> present a threat to public health. The DEIR also does not discuss where storage, mixing, <br /> rinsing and disposal of pesticides may have occurred and whether contamination exists. In <br /> addition, it does not indicate whether any sampling was performed to identify other possible <br /> contaminants of concern associated with the tanks, drums, colored-powders and discolored <br /> soil. Because the Phase I and II Environmental Site Assessments were not included as <br /> appendices to the report, DTSC is unable to determine whether site conditions may exist <br /> which present a threat to human health of the environment. <br /> DTSC recommends that additional research and sampling be conducted prior to <br /> construction to address the concerns identified above. Guidance for conducting <br /> investigations and sampling agricultural fields is available on DTSC's web site at: <br /> hftp://www.dtsc.ca.gov/PublicationsForms/prop pubs.cfm?pros=Site%20Cleanup. <br /> If you have any questions, please contact me by email at tmilesadtsc.ca.aov or by <br /> telephone at (916) 255-3710. <br /> Sincerely, r^ ^ n <br /> Tim Miles <br /> Hazardous Substances Scientist <br /> ® Printed on Recycled Paper <br />