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ZOMBIE 02AIM,1 Y t SOIL INVESTIGATION WORK PLAN TANKS T-2 AND T-1 AREAS Laura Scudders Tracy Plant f, 100 W. Valpico Road f' Tracy, California 1.0 Introduction This soil investigation work plan is being prepared to address concerns raised by the San Joaquin County Department of Health Services in regards to the site conditions at the Laura Scudder's plant located at 100 W. Valpico Road in Tracy, California (Figure 44 1) . Of particular concern is the possibility that petroleum f hydrocarbon residues may exist beneath the area from which a 10,000 gallon diesel tank (Tank T-2) was removed. A secondary concern is in regards to the lead concentrations beneath the area from which a 1,000 gallon gasoline tank (Tank.T-1) was removed. This report outlines the investigative approach proposed to obtain data to assess the need for further site investigation. 2.0 Tank Use and Test Results The plant area from which the tanks were removed is owned by Laura Scudders, Inc. , a subsidiary of Borden, Inc. The site is located at 100 W. Valpico Road in Tracy, California. The primary person responsible for the site is Mr. George Jeppson with Laura Scudders, Inc. The following is a summary of the results of tank integrity test conducted on tank numbers T-1 and T-2 prior to their removal as well as discussion of an estimate of the quantity and composi- tion of the contents which may have leaked. 2.1 Tank T-2 Area In 1987, the tank T-2 and associated piping were integrity tested by Accutite Company. The tank system failed the test and the tank was subsequently uncovered and retested. The tank passed the retest. The tank piping was then tested and did not pass the test. _. Based an the age of the piping and the tank, both were removed. Prior to 1987, the tank had not been used for more than seven years. No inventory records are available. Therefore, estimates as to the amount of diesel which may have been released over time cannot be estimated. The contents of the tank, according to Laura Scudder's personnel, have always been diesel. Therefore, based on this knowledge and the analytical results for the initial soil samples, any hydrocarbon compound presence found can be assumed to be from diesel fuel. -- -- - -2,2 -Tank-T-1-Area -- - -- ------ - --- ---- - -- - -- - Tank T-1, a 1000 gallon tank, was removed in May 1989. Throughout . the history of the facility, this tank had been used for the storage of only gasoline. . Prior to, and within one year of, the