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ENVIROTMENTAL HEALTIM)EPARTMENT <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> Q Z� Donna K.Heran,R.E.H.S. <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> N' ' •� �' � <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S.,R.D.I.Douglas W.Wilson,R.E.H.S. <br /> Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. <br /> MIKE STRONG <br /> RUTH STRONG PROPERTY DEC 0 3 2003 <br /> 330 E HOLLYWOOD <br /> TRACY CA 95376 <br /> RE: RUTH STRONG PROPERTY <br /> 5157 W BUSINESS LOOP 205 <br /> TRACY CA 95376 <br /> In a telephone conversation with your consultant Advanced GeoEnvironmental, Inc. (AGE) <br /> on December 2, 2003, San Joaquin County Environmental Health Department (EHD) <br /> stated that the above-referenced site could not be closed at this time. The extent of the <br /> dissolved contamination in groundwater has not been defined. Concentrations of total <br /> petroleum hydrocarbons as gasoline as high as 170 micrograms per liter (ug/1) have been <br /> consistently detected in groundwater from the furthest downgradient (north) monitoring <br /> well N1W-8 located approximately 200 feet north of the former underground storage tank <br /> (UST) since installation of MW-8 in October 2002. .A domestic well on the adjacent <br /> property belonging to Hay Growers Association is located approximately 280 feet northeast <br /> of the former UST. Analytical results of the water sample collected from the well were non- <br /> detect, the one time the well was sampled in May 2001. Analytical results of the <br /> groundwater samples from MW-7 located approximately 130 feet northeast of the former <br /> UST location and located between the Hay Growers domestic well and the site were non- <br /> detect except for 77 ug/1 of diesel and 0.88 ug/1 of toluene in the December 2002 sample, <br /> and 0.87 ug/l of toluene in the June 2003 sample. <br /> Submit a work plan to EHD by January 20, 2004 that will define the extent of the <br /> contamination, provide information required for a site-conceptual model and a fate and <br /> transport model that will calculate the time it takes for the dissolved plume to reach the <br /> private well or any other receptors in the area. EHD also requests that the domestic well on <br /> the Hay Growers Association property be sampled before the end of 4th quarter 2003 and <br /> continue to be sampled on a quarterly basis. Please direct any question to Jeff Wong at (209) <br /> 468-0335. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> \ <br /> Jeffrey Wong, REHS Margar�agorio, �REH <br /> LOP/Site Mitigation Unit N Supervisor <br /> c: Advanced GeoEnvironmental Inc. —Brian Millman <br /> c: RWQCB,Central Valley Region—James L. L. Barton,RG <br />