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C�CaR Ion <br /> ' mg/kg(132 @ 2.01- 2.5) to 7 mg/kg (B5 @ 2.0' -2.5'). Concentrations of TPH over 100 <br /> mg/kg were noted in Borings B-2, B-5, and B-6. <br /> Of the three borings with TPH concentrations greater than 100 mg/kg, Boring B-2 <br /> exhibited a sharp decrease in concentration from 3,700 mg/kg in the shallowest sample, <br /> to 14 mg/kg below the fill material. TPH concentrations above 100 mg/kg were noted in <br /> Boring B-5 just below the fill/native interface, and TPH concentrations decreased from <br /> 2,300 mg/kg in Boring B-6 (at 2 feet)to 550 mg/kg(at 8 feet),within the fill material. <br /> Based on the generally low TPH concentrations, the observed vertical attenuation, and <br /> ' the anticipated depth to groundwater of over 100 feet, groundwater is unlikely to have <br /> been impacted. Therefore,no further site assessment work at this time appears <br /> warranted. <br /> ' If you have any questions regarding the contents of this report, please feel free to contact <br /> us at 925.426.2600. <br /> tFCD hep <br /> i <br /> e WCHAEL HURD T <br /> Mn. 0068 <br /> CERTIFIED <br /> Mur 068 HYDROGEOLOGIST <br /> Senior Project Manager EXP. <br /> Environmental Services TqT : <br /> OF C `-O <br /> 1 <br /> I <br /> SAESIPROJECfSt3004\04696 Shell fiery Pump StmionUReponUW4M WC <br /> 4 <br />