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SECOR www secor com <br /> INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> C Oil j Q��Q �l Rancho Cordova,CA 95670 <br /> E fly ,(1tiK��i l 1 (C[i€ MIRfftD 916-861-MO TEL <br /> PFE',$J;T Sf-RV10E 916861 0430 FAX <br /> 03 AUG 22 PM I: 03 <br /> August 20, 2003 <br /> Mr Harlin Knoll <br /> County of San Joaquin <br /> Environmental Health Department <br /> 304 East Weber Avenue, 3rd floor <br /> Stockton, CA 95202 <br /> Re Vent Line Replacement Report <br /> ConocoPhillips <br /> ConocoPhillips Service Station #05447 (Former BP 11191) <br /> 1469 E Hammer Lane <br /> Stockton, California <br /> SECOR Project No 77CP 65447 00 0001 <br /> Dear Mr Knoll <br /> SECOR International Incorporated (SECOR) has prepared this letter, on behalf of ConocoPhillips, to <br /> document the results of soil sampling conducted during the excavation and replacement of vent lines <br /> at the site referenced above (Figures 1 and 2) The City of Stockton is acquiring a portion of the site <br /> adjacent to West Lane to facilitate a road expansion project, thereby requiring the vent line to be <br /> excavated and relocated <br /> BACKGROUND <br /> The site is an operating gasoline service station and convenience store located at the northwest <br /> intersection of East Hammer Lane and West Lane in Stockton, California The site currently has a <br /> leaking underground fuel tank (LUFT) case open with San Joaquin County Environmental Health <br /> Division with the responsible party as BP <br /> FACILITY EXCAVATION AND REMOVAL ACTIVITIES <br /> On July 16, 2003, SECOR observed the excavation and removal of vent Imes by Kern Construction, <br /> of Bakersfield, California The vent Imes appeared to be in good condition, with no holes or cracks <br /> noted during removal Excavation and sampling activities were observed and approved by Mrs <br /> Michelle Lee from the San Joaquin County Environmental Health Division (SJCEHD) <br /> COMPLIANCE SOIL SAMPLING <br /> Vent Lines <br /> On July 16, 2003, soil samples from beneath the vent lines were collected by SECOR as directed by <br /> SJEHD Two soil samples were collected from beneath the vent Imes (VI1-5'and VL2-5') at <br /> approximate depths of 5 feet below ground surface Soil samples were analyzed for total petroleum <br /> hydrocarbons calculated as diesel (TPHd) by EPA Method 8015, total petroleum hydrocarbons <br /> calculated as gasoline (TPHg), benzene, toluene, ethylbenzene, xylenes (BTEX compounds), and <br /> fuel oxygenates (methyl tert butyl ether [MtBE], ethyl tert butyl ether [EtBE], tert butyl alcohol [TBA], <br /> Y <br /> `4 <br />