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t r <br /> Table 1 <br /> Groundwater Analytical Data <br /> Parkinson's Arco <br /> 3250 West Hammer Lane <br /> Stockton,California <br /> Top of <br /> Casing Depth to Groundwater TPN as Ethyl- <br /> Sample Date Elevation Water Elevation Gasoline Benzene Toluene benzene Xylenes MtBE DIPE ETBE TAME TBA 1,2-DCA <br /> Identification Sampled MSL feet b s MSL (ug/l (U11)( u ll (ug/l u n u n u ll u ll (ug/1) (ug/1) EDB u II (ug/1) <br /> MW-5 07/29/02 5.131I 13.61 -8.48 <50 <0.3 0.9 <0.3 1.2 18,000 <25. <25 150 5,700 <br /> 10/07/02 14.40 -9.27 <50 <0.30 0.42 <0.30 <0.60 29,000 <250 <250 <250 5,600 <br /> 01/02/03 13.87 -8.74 <50 <0.30 0.38 <0.30 <0.60 41,000 <5.0 <5.0 230 12,000 <br /> 04103/03 13.61 -8.48 <50 <0.50 <0.50 <0.50 <1.0 29,000 <5.0 <5.0 370 540 <br /> 07/21/03 14.25 -9.12 <50 <0.50 <0.50 <0.50 <1.0 10,000 <5.0 <5.0 <5.0 41,000 <br /> 10/13/03. 15.02 -9.89 <50 <0.50 <0.50 <0,50 <1.0 8,800 <100 <100 <100 <1000 <100 <100 ` <br /> 01/12/04 14.31 -9.18 <50 <0.50 <0.50 <0.50 0.0 1,300 <0.50 <0.50 15 19,000 <0.50 <0.50 <br /> 06/22/04 14.10 -8.97 644 <0,50 0.98 <0.50 <1.0 36 <10 <10 <10 4,900 <10 <10 <br /> 08/12/04 14.60 -9.47 54gi 0.81 0.94 <0.50 <1.0 14 <0.50 <0.50 <0.50 180 <0.50 <0,50 <br /> u94 Micrograms per Inter DIPE Di-isopropyl ether ETRE Ethyl tert butyl ether <br /> MSL Mean sea level TPH Total petroleum hydrocarbons TAME Tert-amyl methyl ether <br /> bgs Below ground surface OBE Methyl tert-butyl ether . 7BA Tert-butyi alcohol <br /> EDB 1,2-Dibromoethane 1,2-DCA 1,2-Dichloromethane <br /> m Well casing elevations surveyed by Morrow Surveying on 71M2 aI Sample contained compounds in the gasoline range,but the chromatogram pattern was not consistent with the expected pattern. <br /> N:lrancfpIT-jectsTrojects\880\040\1ANO 107\3Q04 Shaw Environmental,Inc. <br /> 8/30/2004 <br />