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PPUBLI' HEALTH SERVICES ,o �aG <br /> SAN JOAQUIN COUNTY Q a <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officler . <br /> 4C%FOaa <br /> 445 N. San Joaquin Street • P. O. Box 388 • Stockton, CA 952038 <br /> 209/468-3420 <br /> GEORGE AND MEI TERANISHI <br /> 1600 WEST DURHAM FERRY RD <br /> TRACY CA 95376 <br /> RE: GEORGE'S SERVICE SITE CODE: 1550 <br /> 1600 WEST DURHAM FERRY <br /> TRACY CA 95376 <br /> San i aquin County Public Health Services, Environmental Health Division (PHS/EHL) has <br /> completed review of the "Groundwater Monitoring Fall Quarter 1996" report dated December 18, <br /> 1996 and prepared by Geological Technics. PHS/EHD has the following comments for your <br /> consideration. <br /> The report included the results of the monitoring and sampling event that occurred on September 11, <br /> 1996. Approximately one foot of floating gasoline product was observed in MW2. It should be <br /> noted that the former gasoline tanks were removed almost six years ago, January 24, 1990. Given <br /> the extent of groundwater contamination, nearby drinking water wells, depth to water and the age of <br /> the release, some corrective action will be required to reduce the mass of petroleum products <br /> remaining in the subsurface environment which continues to degrade water quality. <br /> The following is a summary regarding the three drinking water wells which were sampled on <br /> September 11 and September 13, 1996. <br /> F1600West <br /> Well Address SIC APN Date Sampled Analytical <br /> Results <br /> orge Teranishi 255-100-04 9/11/96 B H <50TEX 3ppbb <br /> Durham Ferry <br /> Birkhahn 255-310-24 9/11/96 TPH EX < ppbb <br /> 1697 West Durham Ferry <br /> Muriel Jones 255-310-23 9/13/96 BTEX <.3 ppb <br /> 31448 South Hwy 33 TPH <50 ppb <br /> In response to the observation of free product in MW2, Mr. Teranishi has removed a total of 60 gallons of free <br /> product and water between September 12 and October 31, 1996, pursuant to California Code of Regulations, <br /> Title 23, Division 3, Chapter 16 (Underground Storage Tank Regulations)and the Health and Safety Code. <br /> PHS/EHD in correspondence dated February 23, 1996, directed that a survey of wells within a 2,000 foot <br /> radius of the site be completed. Please note that this information has not been submitted to comply with <br /> PHS/EHD's directive. <br /> PHS/EHD in correspondence dated February 23, 1996, directed you again to initiate quarterly groundwater <br /> sampling as PHS/EHD did in correspondence dated November 9, 1995. Since that time only one groundwater <br /> sampling event was scheduled in 1996, September 11, 1996. Clearly not in compliance with PHS/EHD's <br /> directive. <br /> A Division of San Joaquin County Health Care Services <br />