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TIO 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 6100 <br /> 25775 S Patterson Pas,Tracy, CA <br /> ABBREVIATIONS&SYMBOLS <br /> GRO=Gasoline range organics <br /> DRO=Diesel range organics <br /> MtBE=Methyl telt-butyl ether <br /> DO=Dissolved oxygen <br /> ft=feet <br /> bgs=below ground surface <br /> msl=mean sea level <br /> TOC=top of casing <br /> ug1L=micrograms per liter <br /> mg1L=milligrams per liter <br /> P1NP=purged/not purged <br /> <=below given laboratory detection limit <br /> —=not measured or analyzed <br /> 6100-Table 1 Page 8 of 8 SECOR <br />