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GROUND ZERO ANALYSIS, INC. <br /> 2291 W. March Lane, Suite 127D <br /> Stockton, California 95207 <br /> Telephone: (209) 952-3481 <br /> Facsimile: (209) 952-9892 <br /> April 10, 1996 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Services, <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject: Limited Site Assessment, Don's Dandy Mart, 20 W. Turner Road, Lodi, CA <br /> Dear Ms. Lagorio: <br /> Ground Zero Analysis, Inc. has been retained by Mr. LaDon Strapp to perform a limited site <br /> assessment at 20 W. Turner Road in Lodi, California. The site is operated as a Mini-market/gas <br /> station. It is our understanding that three 10,000 gallon underground fuel storage tanks are <br /> located at the site. One tank stores diesel #2 and two tanks store unleaded gasoline. Mr. Strapp <br /> has indicated that the tanks have passed all tightness tests since he began operating the facility <br /> several years ago. <br /> The limited site assessment will consist of using the direct push method to collect soil samples <br /> near the fill end of each tank and near the pump island. The pushed soil borings will be <br /> advanced by Spectrum Exploration (C57-512268) of Stockton, California. The locations of the <br /> pushed soil borings are shown on the attached permit application. Soil samples will be collected <br /> at depths of approximately 15 and 25 feet from each boring for laboratory analysis. Soil <br /> samples collected from near the fill end of the diesel tank will be analyzed for total petroleum <br /> hydrocarbons as diesel (TPHD) and benzene, toluene, ethylbenzene, and xylenes (BTEX) by <br /> Argon Mobile Labs (DHS #1873) of Ceres, California. The samples collected near the fill ends <br /> of the two unleaded tanks will be analyzed for total petroleum hydrocarbons as gasoline (TPHG) <br /> and BTEX. The soil samples collected from near the pump island will be analyzed for TPHG, <br /> TPHD, and BTEX. Samples will be transported in an iced cooler under chain of custody <br /> procedures. <br /> After sample collection, each boring will be grouted to the surface with neat cement. No drill <br /> cuttings are expected due to the sampling method. <br />