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v <br /> I� <br /> Applied GeoSystems 4191-E Power Inn Road, Sacramento, CA 95826 (916) 452-2901 <br /> • FREMONT • IRVINE • HOUSTON • BOSTON • SACRAMENTO • CULVER CITY • SAN JOSE <br /> January 8, 1990 <br /> 1121gdem <br /> AGS 86091-7 <br /> Mr. Glenn Dembroff <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> + Subject: Letter Report of quarterly ground-water monitoring, third quarter 1989, at <br /> Beacon Station No. 502, 35 North Cherokee Lane, Lodi, California. <br /> Mr. Dembroff: <br /> At the request of Ultramar (formerly Beacon Oil Company), we are presenting this letter <br /> report summarizing the methods and results of the quarterly ground-water monitoring <br /> performed by Applied GeoSystems at the subject site. The site is located on the southwest <br /> corner of North Cherokee Lane and Elm Street in Lodi, as shown on the Site Vicinity Map <br /> (Plate P-1). The locations of the groundwater monitoring wells relative to site facilities are <br /> depicted on the Generalized Site Plan (Plate P-2). Previous work at the site by Applied <br /> GeoSystems is documented in the reports cited in the attached References list. <br /> A geologist from Applied GeoSystems visited the site on September 28, 1989, and October <br /> 11, 1989, to collect groundwater samples from the five monitoring wells for laboratory <br /> analysis. The depth to the ground-water surface was measured and the water was analyzed <br /> subjectively in each monitoring well by procedures outlined in the attached Field <br /> Procedures. The geologist noted no subjective evidence of hydrocarbon product. Results <br /> of these and previous subjective analyses are summarized in Table 1. <br /> Ground water from each monitoring well was purged and sampled as outlined in the Field <br /> Procedures. The field geologist initiated a Chain of Custody Record that accompanied the <br /> samples to the analytical laboratory. A copy of that record is attached. The purge water <br /> From the wells was stored temporarily onsite in properly labeled, 55-gallon, 17-E steel <br /> drums, approved for that use by the Department of Transportation, pending removal by <br /> Ultramar. <br /> to Mobile Chem Labs, Inc., in Lafayette, California (Hazardous Waste Testing Laboratory <br /> Certificate No. 195), analyzed the ground-water samples for total petroleum hydrocarbons <br /> (TPH) as gasoline by California Department of Health Services Leaking Underground <br /> Fuel Tanks (LUFI`) Method and for benzene, toluene, ethylbenzene, and total xylene <br />