ARCHIVED REPORTS_XR0012731 - Laserfiche WebLink

Home Browse Search

�r, - Elm, 1.0 INTRODUCTION 1.1 Site Location/Regulatory History The subject site is located at 1700 East Highway 120 in Ripon (Figure 1). The property is presently occupied by Franzia Brothers Winery a winemaking and bottling operation. The underground tanks :were located northeast of the winery and were used to fuel their equipment and trucks (Figure 2) . The Franzia site has been under investigation since December 1988, when one 500 gallon waste oil, one 10,000 gallon gasoline and one 10,000 gallon diesel underground tank were removed from the site (Figure 2). The San Joaquin County Public Health Services has been the lead agency for the entire project. In May 1989, the site was placed in the State Water Resources Control Hoard's UST Pilot Program for oversight of assessment and cleanup activities at contaminated underground tank sites. 1.2 Work Performed In December 1988, one 500 gallon waste oil, one 10,000 gallon gasoline and one 10,000 gallon diesel underground storage tank were removed. The two 10,000 gallon tanks were located at ,:he former fueling area and the waste oil tank - was located 'adjacent to Building E (Figure 2). Gasoline hydrocarbons were detected beneath the east end of both tanks (Table 1 and Figure 3). No diesel hydrocarbons were detected and no hydrocarbons were detected beneath the waste - � oil tank. In February 1989, SEMCO submitted a re-excavation workplan �. to the San Joaquin Public :health Services to remove the remaining contaminated soil in the former gasoline/diesel tank pit. The workplan was accepted with the requirements that only 900 cubic yards could be removed and only to a depth of 25 feet below grade. On April 13, 1989, re-excavation of the former gasoline and diesel tank pit was started by SEMCO. High concentrations of gasoline hydrocarbons were detected in the excavated soil. The re-excavation continued until the 900 cubic yard limit was achieved. At this time four floor and four wall samples were collected and, analyzed by a State cEirtified laboratory for benzene, toluene, ethylbenzene, xylenes (STEX) by EPA method 8020 and total petroleum hydrocarbons as gasoline (TPHG) by DHS Luft Method (Figure g). Composite -- ---- ---- - samples-(3 -to--1)--were-collected--from each--ofT the-eighteen, fifty cubic yard piles to determine the quantity of soil that could be aerated. The laboratory results of the floor and wall samples reported low levels in the .floor and -high levels in the east wall. (Table 2).. Hydrocarbons were not reported in the other three wall samples. __ 1