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CAMBRIA Table 3.Groundwater Chemical Analytical Data-SoB Borings,Shell-branded Service Station,6131 Pacific Avenue,Stockton,California MTBE by MTBE by Smnple Sample Depth Dote TPHg B T E X 8020 8260E TAME TBA DIPE ETBE ID (fbg) Sampled (119/1) (11g/1) (Ag/1) (µms (µg/l) (99m (9911) (14gm (119m (149/1) (ug/L) Ge'l NA 21-Sep-95 22,000 6,900 2,700 240 510 NA NA NA NA NA NA Gea2 NA 21-Sep-95 60,000 9,800 9,700 970 4,900 NA NA NA NA NA NA Ge 3 NA 22-Sep-95 14,000 4,100 660 220 410 NA NA NA NA NA NA Gc.4 NA 22.Sep•95 75,000 8,800 15,000 1,000 5,600 NA NA NA NA NA NA 41 SB-5 50 23-May-00 283,000 $1,900 72,100 Sf00 33,7/10 4,250 <1,250 a,500 60,000 4,500 Q,500 SB-5 60 23-May-00 742 36.7 166 44.0 104 6.00 .2.50 6.00 <100 6.00 6.00 SB-5 71 23-May-00 151 2.29 22.1 6.90 38.8 4.50 4.00 Q.00 <40.0 d.00 Q.00 \, S11-5 85 23-May-00 131 3.14 20.6 4.11 26.3 Q.50 <0.500 Q.00 40.0 <1.00 <1.00 SB-5 97 24-May-00 118 486 27.9 4.39. 25.4 a.50 <0.500 Q.00 40.0 <1.00 <1.00 SB-6 50 25-May-00 1,060 4.63 45.4 14.1 94.4 33.1 33.8 4.50 60.0 18.6 .2.50 r a,j`• SB-6 60 25-May-00 1,300 37.6 238 415 237 6.00 6.00 <10.0 <200 <10.0 <10.0 +C•-/{) SB-6 70 25-May-00 95.3 1.76 11.1 2.71 18.7 a.50 4.500 <1.00 <20.0 <1.00 <1.00 SB-6 80 25-1&y-110 140 1.36 11.0 3.54 24.2 4.50 4.5 0 4.00 40.0 <1.00 <1.00 SB-6 90 25-May-00 1445 2.68 31.2 25.8 1.7 4.50 4..50 6.00 <100 6.00 6.00 SB-6 97 25-May-00 445 1.72 13.8 8.92 71.7 Q.50 AS00 <1.00 Q0.0 <1.00 4.00 Abbreviations and Nota: TPHg=Totdpdroleum hydrocarbons u gasolineby HPAMcffmd 8015(Modified). BTEX=Beaune,toluene,ethylbenzahe,and xylamn by EPAMethod 8020. MTBE=Methyltertiary butyl dha by EPAMdhod noted. TAME=Tertiary amyl methyl ether by BPAMetmd 826UB. TBA=Tertiary butyl akoh.lby EPAMethod 826013. DIPH=Di-isopropyl ether by EPAMethod 8260B. ETRE=Dhyl tertiary butyl ether by F.PAMethod 8260B. fbg=Fed below Bade µg0=Micrograms per liter(para per billion). <,=Not detorted at detection limit x NA=Not analyxcd 0854 Page 1 of I