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PUBLIC HEALTH SERVICES UIp <br /> SAN JOAQUIN COUNTY <br /> r. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 304 E.Weber Ave., 3rd Floor • P. O. Box 388 • Stockton, CA 95201-0388 y•.,,, .;,.�;P <br /> 209/468-3420 00 C) �iFbn <br /> DAN KIRK <br /> SHELL OIL CO <br /> PO BOX 4023 MAILED AUG 141995 <br /> CONCORD CA 94524 <br /> RE: VICTOR ROAD SHELL SITE CODE: 1746 <br /> 880 VICTOR ROAD <br /> CONCORD CA 94542 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> April 19, 1995 Underground Storage Tank Closure Report prepared by Fugro West, Inc. for the above <br /> referenced site. <br /> The report describes the purpose and scope of work, provides a site description, summarizes the tank <br /> removal and analyses and provides a conclusion based upon the data. <br /> PHS/EHD has determined that residual contamination above the screening level is present in the tank <br /> pit. Specifically sample 2NSW/17 and sample TP 1/21. Sample 2NSW/17 contains .024 ppm of <br /> Xylene. The screening level for Xylene is .005 ppm. Sample TP 1/21 contains 1000 ppm TPH-gas, <br /> .2 ppm Toluene, .3 ppm Ethylbenzene and 14 ppm Xylene. The screening levels for these constituents <br /> are TPH-gas 10 ppm; Toluene, Ethylbenzene and Xylene .005 ppm. <br /> PHS/EHD recommends that the lateral and vertical extent of this contamination be determined and mass <br /> balanced. The mass balance calculation should be included in a feasibility study to determine the most <br /> economical method of mitigating the contamination present beneath the newly installed UST's. <br /> PHS/EHD recommends that the risk assessment/feasibility study be submitted to this agency by <br /> September 15, 1995. <br /> For additional information please contact Steven Season at (209) 468-3459. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Steven Sasson, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> SS <br /> cc: Paul Graff, Fugro <br /> Annable Macky, SWRCB <br /> Eliazbeth Thayer, CVRWQCB <br /> A Division of San Joaquin County Health Care Services <br />