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Table 1 .� Sod Chemistry Data Chevron Station#9-3232 {D� n 8660 Lower Sacramento Road V f� Stockton,California Sample Sample Sample Depth TPHg Benzene Toluene Ethylbenzene Xylenes MTBE 2 _ No Date (feet) (ppm) (ppm) (ppm) (ppm) (ppm) (Ppm) Soil BorInizBH-1 BH-1-15 4/26199 i5 8,560° <5 00 158 180 758 <501<0 100 BH-1-30 4/26/99 30 6,780 311 194 901 405 <50/<0100 13H-1-45 4126199 45 1,500` 542 292 191 842 <12 5/<0 100 Soil Boring BH_-1A BH-IA-50 5/6199 50 3,040 475 135 57 1 213 <10 0/<0 100 BH-IA-60 5/6199 60 5 454 0 247 0 672 0 174 0 701 <0 0500 13H-IA-65 5/6/99 65 <1 00 00116 00474 00153 0 649 <0 0500 Soil BoAne BH-2 BH-2-10 5/5/99 10 1,1205 <0 250 0 694 990 769 <2 50 BH-2-20 5/5/99 20 1,3306 <250 250 249 131 <2 50 BH-2-30 5/5/99 30 117406 763 102 462 185 <25 0/<0 100 BH-2-40 5/5/99 40 925, 208 0 256 0 329 1 46 <0 250 BH-2-50 5/5199 50 9634 213 120 25 1 962 <5 00 BH-2-60 5/5/99 60 1 685 00587 00676 00417 0 157 <0 0500 Soil Boren B11-3 BH-3-10 5/5/99 10 1,7206 0 514 262 570 2890 <5 00 BH-3-20 515199 20 3,2206 2 10 145 863 401 <10 0 BH-3-30 5/5/99 30 4,9206 59 1 368 114 516 <25 0/<0 100 BH-340 5/5199 40 4,1704 658 212 813 331 <25 0 BH-3-50 515199 50 2,6804 377 116 512 196 <10 0 BH-3-60 5/5199 60 5 015 0 112 0 390 0 165 0 726 <0 500 BH-3-70 5/5199 70 5 834 0 188 0 541 0 212 0 896 <0 100 i Soil Boren BH-4 BH-4-10 5/6199 10 <1 00 <0 00500 <0 00500 <0 00500 <0 00500 <0 0500 BH-4-20 5/6/99 20 <1 00 <0 00500 <0 00500 <0 00500 <0 00500 <0 0500 BH-4-30 5/6/99 30 <1 00 <0 00500 <0 00500 <0 00500 <0 00500 <0 0500 BH-4-40 5/6199 40 <1 00 <0 00500 <0 00500 <0 00500 <0 00500 <0 0500 BH-4-50 516/99 50 1 646 165 <0 100 422 694 <1 00/<0 100 BH-4-60 5/6199 60 <1 00 <000500 000538 <0 00500 00254 <0 0500 BH4-65 5/6/99 65 <1 00 <0 00500 <0 00500 <0 00500 000896 <0 0500 Stockpile SP1-A,B C,D' 5/10/99 -- 630 062 20 36 11 NR Ex lawn Analytical Methods TPHd=Total Petroleum Hydrocarbons as Diesel TPHg=EPA Modified Method 8015 TPHg=Total Petroleum Hydrocarbons as gasoline BTEX/MtBE=EPA Method 8020 BETX r Benzene,toluene,ethylbenzene and xylenes Oxygenates=EPA Method 8260 MTBE=Methyl tent-butyl ether ppm=Parts per million Analytical LaboratoHes NR=Not required Sequoia Analytical(ELAP#1271) 'MtBE(EPA Method 8020/EPA Method 8260) and Sequoia Analytical(ELAP#1624) Laboratory results for oxygenates presented on Table 2 'Alco analyzed for TPHd(73 mg/kg,laboratory reported as unidentified hydrocarbons>C9), lead(8 2 mg/kg)and halogenated volatile organics by EPA Method 8010(All 8010 analytes were reported at levels below laboratory detection limits) °Chromatogram pattern gaolme C6-C12 5 Chromatogram pattern weathered gasoline C7-C12 6 Chromatogram pattern weathered gasoline C6-C12 346463 04