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SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA PIZ <br /> CALTRANS MAINTENANCE STATION <br /> STOCKTON, CALIFORNIA <br /> fl <br /> VW-2 3116/98 21.90 53.70 -31.80 7,400 1,000 1,100 $60 180 1,100 <5 NR 4636 <br /> VW-2 6/26198 21.90 49.87 -27.97 9,000 <5,000 1,400 670 330 2,100 (<5) NR 7508 <br /> VW-2 9128198 21.90 51.75 -29.85 8,400 <5,000 1,800 530 400 1,900 75(37.4) NR 11 <br /> Notes <br /> TQC=Top of casing elevation, MSL= Mean Sea Level <br /> TPHG=Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015M. <br /> TPHD=Total Petroleum Hydrocarbons as Diesel by EPA Method 8015M. <br /> BTEX= Benzene,Toluene, Ethylbenzene,and Total Xylenes by EPA Method 8020. <br /> MTBE= Methyl Tertiary Butyl Ether by EPA Method 8020. <br /> <= Less than method detection limit,'------- =Not measured,sampled tested,or present <br /> All groundwater level measurements are presented in feet <br /> mg/l=milligrams per liter, pg/1=micrograms per liter <br /> (<5)= MTBE concentration as calculated by EPA Method 8260 <br /> NR denotes Not Reported. <br /> PVraneeftpmjeMcaltp0970iolrist-MonWablei.x[s Page 7 of 7 <br />