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i <br />` TABLE 1 CUMULATIVE SUMMARY OF CONCENTRATIONS (mg/kg =ppm) OF <br /> PETROLEUM HYDROCARBONS IN SOIL. SAMPLEME <br /> S,FORR EXXON <br /> RS 7-3942, 4444 PERSHING AVENUE, STOCKTON, CALIFORNIA <br /> Total <br /> Petroleum <br /> SampleSam le Depth Ethyl- Hydro- <br /> Number <br /> ydro- <br /> Num er Date feetBenzes _TQ 1-upne nzene Xvlenes carbons <br />' Composite samples of sods excavated dunng tank removal -HLA <br /> SP1(1-4) 09/09/86 NA NA NA NA <10 <br /> <10 <br /> SPl(5_8) 09/09/86 NA NA NA NA <br /> SPI(9-12) 09/09/86 NA NA NA NA <10 <br />' SP2(1-4) 09/09/86 NA NA NA NA 35 <br /> SP2(5-8) 09/09/86 NA NA NA NA <10 <br /> SP2(9-12) 09/09/86 NA NA NA NA <10 <br />' Closure samples from bottom of expanded excavation-HLA <br /> EX-1 09/23/86 20.0-210 <0 05 <0 05 NA <0 5 <10 <br />' EX-2 0912.3/86 20 0-21 0 77 82 NA 260 6,900 <br /> EX-3 09/23/86 200-21.0 <0 05 040 NA 064 60 <br /> EX-4 09/23/86 20 0-21 0 010 14 NA 34 720 <br /> • EX-5 09/23/86 200-21-0 <0 05 <0 05 NA <0 05 <10 <br /> EX-6 09/23/86 20 0-21 0 <0 05 <0 05 NA <0 05 <10 <br /> EX-7 0903/86 20 0-21 0 <0 05 <0 05 NA <0 05 <10 <br /> Note- HLA = Harding Lawson Associates, AEMC = American Environmental Management <br /> Corporation, EA =EA Engmeering, Science, and Technology <br /> 1 <br /> Composite samples of sods stockpiled from expanded excavation before aeration - HLA <br />' SP1-4 0903/86 NA NA NA NA 5,600 <br /> SP5-8 09/23/86 NA NA NA NA 5,100 <br /> SP9-12 09/23/86 NA NA NA NA 1,600 <br /> Composite samples of stockpiled sods from expanded excavation before aeration - HLA <br /> RSP(1-4) 10/03/86 <0 05 <0 05 NA <0 05 10 <br /> RSP(5-8) <br /> 10/03/86 <0 05 <0 05 NA <0.05 <10 <br /> RSP(9-12) 10/03/86 NA NA NA NA 1,000 <br />' Composite samples following aeration (worst case) -HLA <br /> AS-1 11/13/86 NA NA NA NA 200 <br /> SP3-1 11/21/86 NA NA NA NA 25 <br /> • <br />