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.,r <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> )� O <br /> r a Donna K.Heran,R.E.H.S. Unit Supervisors <br /> H r Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al OIsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> Douglas W.Wilson,R.E.H.S. <br /> cgC.l F o ��P Program Manager Man ax <br /> Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Co R.E.H.S. F : (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> PAUL SUPPLE SEP 2 tQd <br /> ARCO PRODUCTS COMPANY <br /> P 0 BOX 6549 <br /> MORAGA CA 94570 <br /> RE: ARCO #5469 SITE CODE: 0710 <br /> 130 S. Wilson Way <br /> Stockton, California <br /> San Joaquin County Environmental Health Department (EHD) issued you a directive by letter dated 31 <br /> August 2005 to submit a site conceptual model that incorporates data from your site and the sites located <br /> at 101 and 102 South Wilson Way, and that provides a professional opinion of the origin of the plumes of <br /> dissolved contaminants traversing between the 102 and 130 S. Wilson way sites. <br /> In order to assist the three responsible parties (RPs) and/or their consultants in complying with this <br /> directive, EHD has scheduled a meeting at EHD (304 E. Weber Avenue, 3`d Floor, Stockton) on 20 <br /> October 2005 at 9:00 AM. EHD is inviting the three RPs and/or their consultants to this meeting to provide <br /> attendees copies of boring logs and analytical data for each site to facilitate the research needed for the <br /> requested models and will outline current EHD analysis and interpretations of the available data as <br /> related to the development of a site conceptual model. Attendees are welcome to, but need not, comment <br /> on their own interpretations at this time. This is intended to be an informational meeting to help you meet <br /> the 31 August 2005 directive. As a point of clarification, it is not EHD's intention that you provide detailed <br /> models of the plumes emanating from the other sites, but to characterize your plume and demonstrate its <br /> relationship to the area of possible commingling between the 102 and 130 S. Wilson Way sites, which will <br /> most likely require that you incorporate data from the other sites. Please let the undersigned know if you <br /> or your consultant will attend the meeting. <br /> Questions or comments may be directed to Nuel Henderson by telephone at (209)468-3436, or by mail <br /> to the address on the letterhead. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Nuel C. Henderson, Jr., PG <br /> Unit IV-Site Mitigation <br /> cc: ,lames L. L. Barton ---CVRWQCB <br /> Jay R. Johnson —Stratus <br />