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L O.E.S. - Mataga Olde/eu1Ck <br /> June 16, 1993 <br /> Page -2- <br /> removal, the tank^ appeared Tto betiin good ;condition. <br /> Upon - east and west <br /> Hydrocarbon staining was present ori the north, ° <br /> riaximately 4 feet`'below <br /> sides of the excavation to a depth of appy <br /> round surface (BGS) . _ one soil sample`nwasataken from theme <br /> the g = 3 s <br /> north s.idewall at a depth of 3 feet BGS -and-One was taken from <br /> beneath the <br /> west end of the tank at a depth: of., 5 feet BGS (See <br /> le ,locations) : The laboratory.reported motor <br /> Figure 2- for. samp � <br /> ! �eth l benzene (1',600 <br /> oil (5,900 mg/kg) , xylene <br /> _(13,000 µg/kg) , y <br /> s were detected in the north sidew,all <br /> lig/kg) and various metal_ 4<< <br /> sample. In the _sample collected from -beneath the west end of the <br /> tank, zinc. (27 mg/kg) and lesser amountsAOf chromium and nickel <br /> a <br /> `~ were detected. 'Neither diesel, PCB's norchlorinated <br /> hydrocarbons were detected in either of the two soil,. samples • <br /> For additional tank removal information refer to-Tank Pull- <br /> Testing Results, Mataga olds/Buick, preparedby Condor, dated <br /> 6/19./91. <br /> 3.0 OVER-EXCAVATION n <br /> On May 17, 1993, Oil Equipment Service excavated <br /> approximately 55 cubic yards of hydrocarbon impacted soil from <br /> the Mataga site - (Figure 3, Appendix A) . - ='Dave Meade and Glen <br /> White of Condor -were on site to ,monitor the over-excavation and <br /> CONDOR <br />