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I ITABLE 4 SUMMARY OF ANALYTICAL RESULTS IFormer Canteen Facility 1500 Shaw Road Stockton,California Ethyl- Corrected Adjusted Sample Sample Benzene Toluene Benzene Xylenes BTEX MTBE TPH PIDs Revy/Emis ILocation Date (1191L) (PWL) (lam) (AWL) ()lg/L) (AWL) {µg/L} E my (Ibs/hr)° SVE Infl 03125/04 350 1,000 110 480 1,940 500 15,000 3,230 Effluent 390 340 920 460 93 1 250 270 27 ICE Unit Effiewncy: 98.9% 96.6% 9L6% 90.4% 952% 95.0% 98.2% 99.2%_ SVE Infl 04/02/04 290 490 30 100 910 500 12,000 4,120 I Effluent 0 250 0 250 0 250 0 250 100 250 25 32 ICE Unit Efficiency: 999% 99.9% 99.2% 99.8% 999% 99.8% 992% SVE Intl 04/16/04 230 370 18 69 687 500 5,100 I,099 I Effluent 0 250 0 250 0 250 0 250 100 250 25 68 7 ICE Unit Effreiency: 99.9% 99.9% 986% 99.6% i 99.9% 99.5% 93.8% SVE Infl 05/07/04 230 520 23 0 99 0 872 50 0 7,100 647 I Effluent 340 160 150 68 0 277 __025 1,400 28 ICE Una Efficiency: 85.2% 69.2% 34.8% 31.3% 68.2% 80.3% 95.7% SVE Infl 05/19/04 160 480 280 120 788 500 7,100 647 I ffluent 130 110 140 680 205 025 960 28 ICE Unit Effficiency• 91.9% 77.1% 50.0% 43.3% 740% -- 86.S% 957% ISVE Infl 06/04/04 100 370 250 99 594 <25 5,800 2,012 1 938 Effluent 110 90 110 450 157 <25 880 457 0 035 ICE Unit Efficiency: 89.0% 75.7016 56.0% $4.5% 73.6% --- 84.8% 97.7% 98.2% SVE Infl 07/28/04 100 720 790 380 1,279 <50 8,000 6,679 4 485 (fluent 0 125 0 125 0 125 0 125 0 500 <2 5 125 2 13 0 002 ICE Unaclency: 999% 1000% 99.8% 100.0% 100.0% --- 99.8% 100.0% 100L0% SVE Influent 09/03/04 550 370 530 240 718 <50 5,500 780 1 019 Effluent 200 380 130 600 113 <2 5 500 532 0 037 ICE Unit Effrclency. 96.4% 89.7% 75.5% 7S.0% 843% - 90.9% 93.2% E 96.4% SVE Influent 10/15/04 940 430 160 780 1,464 <50 8,400 448 0 873 flluent 200 380 130 600 113 <2 5 250 1 14 0 001 ICE Unit Efficiency: 979% 91.2% 91.9% 92.3% 92.3% - 1 99.7% 99.7% 99.9% I SVE Influent 10/29/04 880 330 100 580 1,098 <50 6,500 1,398 1 181 Effluent 1 200 380 130 600 113 <25 12 5 000 0 000 ICE Unit E cien 977% 8&5% 87 0% 89.7% 89.7961 99.9% 1000% 100.0% NOTES: I To determine the influent and effluent concentrations,the following analytical methods were utilized I BTEX - Modified EPA Method SW946-8021B MTBE - Modified EPA Method SW846-8021B TPH - Modified EPA Method SW846-8015 XG 2 The shaded values indicate constituents which were found to be MDL One half the BDL is presented 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 effluent includes the remaining hydrocarbons from BOTH the Influent stream and the supplemental propane supply For these reasons,the"ICE Unit Efficiency" is inherently underestimated(the actual number is higher than indicated) 4 The in-flow of propane has been added to the Influent recovery rates to get an accurate portrayal of destruction efficiency