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1 <br /> ARCADIS Mr.Walter Hanley <br /> December 23,2005 <br /> Two discrete soil samples were collected from each boring,in.accordance with <br /> accepted sampling procedures using brass liners,TeflonTM sheet end-sealing, <br /> labeling,and chain-of-custody procedures.The depths of sample collection for each <br /> boring were as follows: <br /> Soil Boring Soil Sample De the feet b s <br /> SB-1 12 19 <br /> SB-2 15 23 <br /> SB-3 13 1.9 <br /> Following the advancement of the soil borings, ARCADIS collected grab <br /> groundwater samples from each borehole.Temporary l'-inch PVC casings were <br /> inserted into the open boreholes to allow for the collection of grab groundwater <br /> samples.The casings were slotted from the bottom of the well to approximately five <br /> feet above the first encountered groundwater,based on the lithology observed during <br /> the boring advancement. The grab groundwater samples were collected using new <br /> disposable bailers in accordance with accepted sampling procedures including using <br /> laboratory-provided United States Environmental Protection Agency(USEPA)- <br /> approved containers, labeling, and appropriate chain-of-custody documentation. <br /> Grab groundwater and soil samples were placed on ice.and transported to Curtis& <br /> Tompkins,Ltd.,a California State-certified analytical laboratory under appropriate <br /> chain-of-custody documentation. <br /> Soil and groundwater samples were analyzed for: <br /> • Total petroleum hydrocarbon.as Diesel(TPH-d)by USEPA Method 8015; <br /> ■ TPH as Gasoline(TPH-g); Benzene,Toluene,Ethylbenzene,and Xylene <br /> (BTEX); and Methyl Tert Butyl Ether(MTBE)and other oxygenates by <br /> USEPA Method 8260;and <br /> ■ California LUFT(Leaking Underground Fuel Tanks)Metals by USEPA <br /> Method 6010B. <br /> Drilling equipment was steam cleaned prior to the initial borehole advancement and <br /> between each borehole location.The soil core samplers were also cleaned between <br /> each sample with laboratory-grade detergent and potable water. Upon completion of <br /> gAprojects•active%q stocRtonlphase ii12059 navy drive site inv.doc 4/8 <br />