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. f <br /> Former Ocampo Property Page 2 of 2 <br /> 821 S. Wilson Way August 11, 2014 <br /> Stockton, CA 95205 <br /> • According to the Well Installation Report (Nov 2008), a sand interval extends across <br /> the site varying in depth from approximately 43' bsg to 50' bsg. In addition, the cross <br /> section in the report shows the lithology to be silty clay/clayey silt at a depth of <br /> approximately 33 feet, which was recently approximately the same as the depth to <br /> water. Therefore, please collect sufficient soil samples in order to demonstrate the <br /> groundwater samples collected are from the more permeable sand/sandy unit, which <br /> would be the potential contaminant migration pathway, if the unit extends that far. <br /> Please contact Angelica Sandoval Marin at (209) 468-2650 or amarin@sjcehd.com if you <br /> have any questions. <br /> Sincerely <br /> Angelica S. Marin, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Cori Condon, Senior Engineering Geologist, California Regional Water Quality <br /> Control Board Central Valley Region, 11020 Sun Center Drive, Suite 200, Rancho <br /> Cordova, California 95670 <br /> Daniel J. Villanueva, Project Geologist, Advanced GeoEnviron mental, Inc., 837 <br /> Shaw Road, Stockton, CA 95215 <br />