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r t.r4 <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION 0; A <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer ..'ca .P. <br /> 445 N. San Joaquin Street • P. 0. Sox 388 • Stockton, CA 95201-0388 <<Fo' `' <br /> 209/468-3420 <br /> MEMORANDUM <br /> TO: Interested Parties <br /> FROM: Mary Meays, Senior REHS <br /> DATE: December 16, 1994 <br /> RE: Country Club Shell located at 2475 County CIub Blvd, Stockton <br /> History <br /> On December 7, 1994, San Joaquin County, Public Health Services Environmental Health Division <br /> (PHS/EHD)was notified that gasoline product was released from underground storage tanks on site. The <br /> tanks in question no longer contain gasoline products. It was estimated that approximately 8,500 gallons <br /> of gasoline was discharged into the environment. <br /> On December 10, 1994, Shell's consultant, Fugro, was on site to install a recovery well. Gasoline <br /> recovery was initiated and approximately 400 gallons of water and product was removed and transported <br /> off site. <br /> On December 11, 1994 and December 12, 1994, gasoline recovery continued and approximately 350 <br /> gallons (150 on 12111 and 200 on 12112) of water and product was removed and transported offsite. <br /> On December 13, 1994, an additional recovery well was installed and vapor extraction was initiated. It <br /> is estimated that by using the two wells, approximately 50 gallons of product is recovered daily. The <br /> recovery of vapors occurs when a vacuum is placed on the recovery wells. The vapors are then i <br /> destroyed by an engine which burns the vapors. The destruction efficiency has been estimated by Fugro <br /> to be 99.99 % based on air samples which have been collected daily since the vapor extraction system <br /> was started-up. The vapor extraction treatment unit is located within a fenced area. PHS/EHD has been <br /> informed that twice daily Fugro has sent a staff person to the site to monitor the system. <br /> Futures <br /> Fugro is in the process of extending the permit from the San Joaquin Valley Unified Air Pollution Control <br /> District to operate the vapor extraction system. The current permit is expected to expire on December <br /> 18, 1994. PHS/EHD has requested that additional vapor extraction wells be installed to enhance the rate <br /> of gasoline recovery. The target date is January 14, 1995 for Shell Oil to submit a plan to remove and <br /> replace the underground storage tanks. The target date is February 1, 1995 for tank removal and <br /> replacement. Every effort will be made to minimize the impacts associated with these activities. <br /> If you have any questions, please contact Mary Meays with PHS/EHD at (209) 468-0337. <br /> A Division of San Joaquin County Health Care Services <br />