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i <br /> y '-Pipona Market <br /> Vertical Groundwater Investigation&November 2003 Quarterly Report <br /> r Page: 5 <br /> An attempt to locate a seventh boring in the driveway of a rental house adjacent to <br /> the Ripona market and east of the former UST site was made by the driller. Due <br /> to overhead electrical and safety concerns, a boring was not constructed in the <br /> driveway. <br /> Ethanol was detected in all but one of the water samples and not detected in any <br /> of the groundwater samples collected from the existing monitoring wells or <br /> f Geoprobe samples; it appeared that the samples may have been cross <br /> contaminated during collection. Throughout the January 2003 hollow stem augur <br /> drilling, the driller liberally used a vegetable base oil to lubricate the augur <br /> connections, drilling rod threads and the threaded portions of the Simulprobe <br /> ' sampling device. The driller used "PAM" vegetable oil spray as a lubricant. <br /> PAM contains grain alcohol (ethanol) as a base or carrier for olive oil in a <br /> pressurized canister for use in cooking. The olive oil can also give a false positive <br /> ` for diesel unless a silica gel cleanup is used to remove plant oils. The driller has <br /> been asked to discontinue this practice or find another lubricant. <br /> Table of Laboratory Soil Sample Results ovember 2002 &January 2003) <br /> r. <br /> Sample I.D. Date Gasoline Benzene Toluene E-Benzene Xylene MTBE <br /> B-2-15' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-2-20' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 1 <br />�._ B-2-25' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-2-30' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-2-35' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-2-45' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br />.-w B-2-55' 11/18/02 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-4-25' 01/21/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B4-35' 01/21/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B4-55' 01/21/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> # B-5-25' 01/22/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-5-35' 01/22/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-545' 01/22/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> f B-5-56' 01/22/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-6-25' 01/23/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-6-30' 01/23/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-6-35' 01/23/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> B-640' 01/23/03 <1.0 <5.0 <5.0 <5.0 <5.0 <10 <br /> ND=Non Detect NA=Not Analyzed, Gasoline reported in mg/Kg BTEX-MTBE in gg/Kg <br /> *MTBE Confirmed present by Method 8260 **MTBE Confirmed not present by Method 8260 <br />�i <br /> f <br />