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• 3s a private well loca-E�ed on the BJJ Co. property, about 250 feet south of the site of Husks Crane 's removed UST 's, but no details are available. A recent review of the County EHD files on the DJJ site show that there is a groondwater monitoring we11 an the property in the area between the main building and a storage shed. It was placed to evaluate possible contamination from a waste tri1 tank which was located beneath the building and was abandoned in place. Water samples taken in ,Janraa,ry, 1991 , shortly after placement of the tank revealed the presence of ethylbenzene, xylene, and TPH as gasoline. Analysis of water taken in January, 1897, revealed that BTEX a, TFH-G were present. However, water samples taken in January °< Apr-1 1 , 1994, were below detection limits for BTEX & TPH-G. As a result of those latest tests , it was inferred that the hydraulic gradient is to the west-southwest , and a workplan was prepared to place an additional well on the property to the south of the waste oil tank The ;work was scheduled for the ween of July 25, 19V4; the files did not have an,/ information concerning the status of that proposed work. There is also a private well on the Husky property 200 feet southesterl y from the tank site; a review of company records did not produce any information concerning pump depth , perforated intervals, or capacity. The well is used to provide water for company operations_ PRIOR USAGE OF THE REMOVED TANKS The 500 'Zc 1 ,000 gallon UST s had both contained gasoline for use in fueling company vehicles and heavy equipment. They had been installed prior to the current owners ' purchase of the property in 1984, and no records are available concerning installation date (s) or usage prior to that time. The pump island and tans-s were removed by company personel sometime prior to May, 199? ; there are no records an the removal or di spo,_i ti on of the tanks. . and the work was not permitted or witnessed by County personel . SUMMARY OF PRIOR INVESTIGATIVE WORK On September 5, 1991 , Husky Crane, Inc. submitted an Application for Underground Tank Closure Fermit to the San Joaquin Co. EHD, (Exhibit I1,) for one ( 1 ) 504 gallon and one ( 1 ) 1 ,000 gal. 1on gasoline tank. As noted above, the tangs had been removed in 1986 or 19271y but that work had not been witnessed b r Sass Joaquin Co. personel . On October 15, 1991 , the site of the removed USI ' s was entered,