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i <br /> PUBLIC 'f4EALTH SERVYCES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer . P <br /> 445 N. San Joaquin Street * P.O. Box 388 • Stockton, CA 95201.0388 <br /> (209) 468-3420 <br /> CATHERINE WHITWORTH <br /> TRUSTEE IN BANKRUPTCY <br /> P 0 BOX 280 CDP <br /> DAVIS CA 95617 <br /> RE: CAL FARM SUPPLY COMPANY AUG 2 2 1994 j <br /> 2040 W WASHINGTON; STOCKTON j <br /> BANKRUPTCY CASE NO. 287-04176-A-7 <br /> I <br /> I <br /> Representatives from the San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) f <br /> and the Central Valley Regional Water Quality Control Board (CVRWQCB)met Wednesday, August 10, 1994 <br /> to discuss the above referenced site. As a result of this meeting, the following concerns must be resolved prior <br /> to closure certification of the site. <br /> Continue quarterly monitoring of all 5 monitoring wells for the petroleum hydrocarbon constituents excluded <br /> from the previous quarterly groundwater sampling: Benzene, Toluene, Ethylbenzene, Xylene, and Total <br /> Petroleum Hydrocarbons, Gasoline. Quarterly groundwater measurements performed to date indicate a shift in ! <br /> the gradient from northeast to northwest; no explanation was provided to account for the change in gradient. <br /> However, we note that the Port of Stockton, 2201 W. Washington Street, drilled a 10 inch casing irrigation well <br /> (100 feet deep with a 50 foot annular grout) in December, 1990, which may account for the gradient shift. <br /> The CVRWQCB is overseeing a nitrate groundwater investigation at the property to the west of the former <br /> CalFarm site. Sampling data noted in the Kennedy/Jenks/Chilton report "Preliminary Site Investigation Report" <br /> dated 14 July 1989 documented nitrate contaminants in a groundwater sample collected from Monitoring Well <br /> #2. The monitoring wells shall undergo sampling for the following constituents: nitrates, organochlorine, <br /> organophosphate, carbamate, triazine, and chlorinated herbicides. The sampling activities will be coordinated <br /> under the direction of Wendy Wyels, CVRWQCB Agricultural Regulatory Unit, who will be contacting you <br /> directly. <br /> If you have any questions, please contact me at (209) 468-3452. ! <br /> Donna Heran, REHS, Director <br /> ,nvironment4 Healt4 Division <br /> i <br /> Diane M. Ffinson, REHS, Supervisor <br /> Site Mitigation Unit <br /> cc: Wendy Wyels, CVRWQCB, Ag Regulatory Unit f <br /> Elizabeth Thayer, CVRWQCB, UST Regulatory Unit <br /> Michael Infurna, PHS/EHD <br /> Charles Hall <br /> Kelye McKinney, Kennedy-Jenks Consultants <br /> A Di%ision of San Joaquin County Health Care Services <br /> i <br />