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TABLE 3 SUMMARY OF ANALYTICAL RESULTS IFormer Canteen Facility 1500 Shaw Road IStockton, California Ethyl- Corrected Adjusted Total I Sample Sample Benzene Toluene Benzene Xylenes BTEX MTBE TPH PEN cvy/Emn. HCs Location Date (µg/L) (ug/L) (µ91L) (µLWL) (µ9/L) (µ9/L) (991L) mv) (lbs/hr)4 (Ag L)5 SVE Infl 3/25/04 350 1,000 110 480 1,940 500 15,000 3,230 15,000 IExhaust 390 340 920 460 93 1 250 270 27 270 CE Unit Efficiency 9R9% 966% 91.6% 90.4% 952% 95.0% 982% 99.2%' 982% I SVE Infl 4/2/04 290 490 30 100 910 500 12,000 4,120 12,000 Exhaust 1 0 250 0 250 0 250 0 250 100 250 25 32 25 CE Unit Efficiency- 999% 999% 992% 99.8% 99.9% --- 998% 992% 99.8% SVE Infl 4/16/04 230 370 18 69 687 300 5,100 1,099 5,100 Exhaust 1 0 250 0 250 0 250 0 250 100 250 25 68 25 CE Unit Efficiency. 999% 99.9% 98.6% 996% 999% — 995% 93.8% 995% KUnit 517/04 230 520 230 990 872 500 7,100 647 7,100 340 160 150 680 277 025 1,400 28 1,400 ciency 85.2% 692% 348% 31.3% 68.2% — 803% 957% 80.3% SVE Infl 5/19/04 160 480 280 120 788 500 7,100 647 7,100 Exhaust 130 110 140 680 205 025 960 28 960 CE Unit Efficiency 919% 771% 50.0% 433% 740% -- 865% 95 7% 865% SVE Infl 6/4104 100 370 250 99 594 ¢25 5,800 2,012 1971 5,800 Exhaust 110 90 110 450 157 1 <2 5 880 710 0 050 880 CE Unit E,fficieney. 89 0% 75.7% 56.0% 545% 7.36% 84 8% 965% 97.5% 84.8% NOTES. 1 To determine the influent and effluent concentrations,the following analytical methods were utilized BTEX– Modified EPA Method SW846-8021 B I MTB1– Modified EPA Method SW846-8021B TPH – Modified EPA Method SW846-8015 XG 2 The shaded values are for constituents found to be NIDI,and which are presented as half the BDL, for calculation purposes 3 SVE Infl indicates samples obtained prior to the ICE unit and represent only the vapors being removed from the subsurface The ICE Exhaust includes the remaining hydrocarbons from BOTH the Influent stream and the supplemental propane supply I I • I