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TA13LIi 1 CUMULATIVESUMNIARY OF CONCEN'I'RA"I'IONS(mg/kg=ppm)OF <br /> PETROLEUM HYDROCARBONS IN SOIL SAMPLES,FORMER EXXON <br /> RS 7-3942,4444 PERSUING AVENUE:,STOCKT'ON,CALIFORNIA <br /> Total <br /> Petroleum <br /> Sarttple Depth Ethyl- 1lydro- <br /> _j umEicr_ 1T.ac' rcc`l _- 'nz,�ne 'IMjLQ= I)e1l7'neXy g:= garbons <br /> Composite samples of soils excavated during tank removal-I ILA <br /> SP1(1-4) 09/0)186 NA NA NA NA <10 <br /> SP1(5-8) 09/09/86 NA NA NA NA <10 <br /> SI31(9-12) 09/09/86 NA NA NA NA <10 <br /> SP2(1-4) 09/(11)/86 NA NA NA NA 35 <br /> SP2(5-8) 09/09/86 NA NA NA NA <10 <br /> Sl'2(9-12) 09109186 NA NA NA NA <10 <br /> Closur.;samples from bottom of expanded excavation-i ILA <br /> EX-1 09/23/86 20.0-21.0 <0.05 <0.05 NA <0.5 <10 <br /> EX-2 09/23/86 20.0-21.0 77 82 NA 260 6,900 <br /> EX-3 09/23/86 20.0-2I.0 <0.05 0.40 NA 1164 60 <br /> EX-4 09/23/86 20.0-21.0 0.10 14 NA 34 720 <br /> EX-5 09/23/86 20.0-21.0 <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 09/23/86 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 Engineering,Science,and Technology. <br /> 5 <br /> Composite samples of soils stockpiled from expanded excavation before aeration-HLA <br /> SP1-4 091123/86 NA NA NA NA 5,500 <br /> SP5-8 09/23/86 NA NA NA NA 5,100 <br /> SP9-12 09/23/86 NA NA NA FIA 1,600 <br /> £ Composite samples of stockpiled soils from expanded excavation before aeration-14LA <br /> RSP(1-4) 10/0386 <0.05 <0.05 NA <0.05 10 <br /> RSP(5-8) 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 /> Comro-ite samples following aeration(worst case)-HLA <br /> AS-I 11/13/86 NA NA NA NA 200 <br /> SP3-1 11/21/86 NA NA NA NA 25 <br /> m3i1/cx xnu/l394 2Jd11 1 <br /> rt <br />