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GROUNDWATER IN'i'ESTIGATI0N WORK pLAN <br /> NE <br /> Former Laura ScuddersTracy plant <br /> 100 W. Valpico Road <br /> Tracy, California <br /> 1.0 Introduction, <br /> This groundwater investigation work <br /> address concerns raised by the San 70alan is being prepared to <br /> Health Services in re quin County Department of <br /> Laura Scudder's regards to the site conditions at the former <br /> California {Figure 1}t. 1aaea ted at 100 W. Valpico Road in Tracy, <br /> particularis <br /> that petroleum hydrocarbon re idues mayoexistthe in the possibility <br /> beneath the area from which a 10,ggq groundwater <br /> was removed_ The possibility thatPetroleum <br /> gallon diesel tank (Tank xis <br /> in the soils beneath this tank has beeen previously <br /> hydrocarbons may exist <br /> discussed in WESTON's Januar 31 i ��previously addressed and is <br /> - This report outlines the investigati "Soil Remediation Proposal." <br /> data to assess the need for further approach proposed to obtain <br /> or remediation. groundwater investigations and <br /> 2.0 Tank Use and Test Results <br /> The plant area from which the: tanks w <br /> ._ by Laura Scudders, Inc. ere removed was formerly owned <br /> owned by the Navarra Brothers Ranchary ary of Borden, Inc. It is now <br /> Valpico Road in Tracy, California. The a site is located at 100 lW. <br /> for the site is Mr. Carl B. Navarra. The follow ng isrimar narsummazybof <br /> the results of tank integrity test conducted on tank T-2 prior to <br /> its removal as well as discussion of an estimate of the <br /> and composition of the contents which may have leaked. quantity <br /> 2.1 Tank T-2 Area <br /> In 1987, the tank T-2 and associated piping were integrity tested <br /> by Accutite Company. The tank system failed the test and the tank <br /> was subsequently uncovered and retested. The tank <br /> retest. The tank piping was then tested and did not pthe test. <br /> assed the <br /> Based on the age of the piping and the tank, both were removed. <br /> Prior to 1987, the tank had not been used for more than seven <br /> years. No inventory records are available. Therefore, estimates <br /> as to the amount of diesel which may have been released over time <br /> cannot be made. <br /> tF�is. The contents of the tank, according to Laura <br /> Scudder's <br /> Personnel, have always been di_esei._._.--Therefore ---based on <br /> _ - - ------ -.knowledge--and--the--analytical results <br /> samples, any hydrocfor .the initial soil -- — - - <br /> arbon compound presence found can be assumed to <br /> be from diesel fuel. <br />