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1 <br /> 0 <br /> 9!"R?--:T S V ICE �... <br /> Cal/EPA August 21, 1996 96 AUG 26 PK I: 50 Pete Wilson <br /> Governor <br /> Steven Sasson, Senior RENS <br /> State water San Joaquin County PHS-EHD <br /> Resources <br /> Control Board PO Box 388 <br /> Stockton, CA 95201-0388 <br /> Division of <br /> Clean Water RE: M&M AUTOMOTIVE AND ELKHORN COUNTRY CLUB SITES <br /> Programs <br /> Mailing Address: Dear Mr. Sasson: <br /> P.O.Box 944212 <br /> Sacramento,CA <br /> 94244-2120 In reference to our phone conversation on August 21, 1996, it was recommended some <br /> 2014 T street, Sort of risk assessment be completed prior to committing a large sum of State funding for <br /> Suite 130 remediation such as Soil Vapor Extraction. A risk assessment may include but not be <br /> Sacramento,CA limited to Risk-Based-Corrective-Action (RBCA) analysis since this will identify any <br /> 95814 <br /> (916)227-4322 possible receptors and/or pathways present at the specified sites. Risk assessment is a <br /> FAX(916)227-4530 cost-effective way to decide if remediation is necessary or what levels of cleanup are <br /> World Wide Web: essential to minimize risk to human health and other exposed receptors. <br /> httpWwww_swrcb.ca. <br /> gov/-cwphome/ <br /> fandhome.htm An example of cost effectiveness is as follows: A RBCA analysis for a specific site will <br /> usually cost $3,000 to $7,000 after the site plume has been thoroughly defined and <br /> monitoring wells installed. Nevertheless a Soil Vapor Extraction system will typically <br /> cost the State for one year of operation approximately $125,000. If the risk analysis <br /> concludes the residual contamination poses no threat to human health, drinking water <br /> wells or other pathways the State has essentially saved over S 100,000 by avoiding <br /> unnecessary remediation to the site. However, if the RBCA analysis concludes there is a <br /> very real risk to sensitive receptors then cleanup and remediation costs can be fully <br /> justified. <br /> Please note the risk analysis process is a new concept to many people and we expect <br /> prices and certain parameters to fluctuate depending on site conditions. However this <br /> process will become more streamlined as more consultants learn how to do RBCA's and <br /> other risk assessments. <br /> Furthermore all work must be directed and approved by you, the local oversight agency <br /> to be eligible for full reimbursement. <br /> Please call me at the above number for assistance. <br /> Sincerely, <br /> Ismael Jacobo <br /> State Water Resourc se Control Engineer <br /> a� Recycled Paper Our mission is to preserve and enhance the quality of California's traler resources,and <br /> ensure their proper allocation:and of ciext use for the benef t of present and future generations. <br />