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TABLE 5 FLOW RATES AND ANALYTICAL RESULTS OF AIR SAMPLE ANALYSES +` Former ARCO Service Station No. 548 1612 Hammer Lane, Stockton, California Date Flow Rate* Vacuum Sample Anal ses(m m3) cfm) "WC) Location TPH Benzene Toluene Eth lbenzene Xylenes MTBE T-Influent 2,650 9.83 116 55.9 241 123 09/28/00 54 18 Influent 9,870 60.1 439 207 874 416 Effluent .19.7 .214 .247 .217 1.28 <0.5 T-Influent 1,920 8.56 70.2 48 227 50.1 10/19/00 46 16 Influent 7,430 20.4 340 193 911 218 Effluent <10.0 <0.05 .0502 <6.05 0.119 <0.5 T-Influent 1,500 2.98 46.9 38.6 189 NR 11/28/00 42 20 Influent 5,910 13.2 192 156 747 NR Effluent <10.0 <0.05 <0.05 <0.05 <0.05 NR T-Influent 2,810 3.84 68.2 53.5 266 14.6 12/07/00 49 10 Influent 6,050 9.2 173 136 64I 33.9 Effluent <2.8 <0.016 <0.013 0.014 0.013 0.5 T-Influent 203 0.128 4.18 3.72 20.1 <0.5 1/8/01 46 17 Influent 300 0.188 6.61 5.33 27.9 <0.5 Effluent 54.8 0.068 <0.05 <0.05 0.064 <0.5 T-Influent 261E�1 <0.05 4.01 4.55 24.8 <0.5 01/23/01 32 26 Influent 301 E" 0.052 4.65 5.13 27.3 <0.5 Effluent <10.0 <0.05 <0.05 <0.05 0.09 <0.5 . T-Influent 2,130[�] <2.5 45.5 59.6 274 <25 02/06/01 32 26 Influent 2,5801'1 <2.5 52.8 68.2 318 <25 Effluent <10.0 <0.05 <0.05 <0.05 0.074 <0.5 T-Influent 1,390 <2.5 12.1 47.8 279 <25 03/07/01 30 22 Influent 1,770 <2.5 16.7 63.9 370 <25 Effluent <10.0 <0.05 <0.05 <0.05 0.074 <0.5 T-Influent 1,670 <0.5 4.64 48.6 297 <5 04/23/01 32 22 Influent 1,830 <2.5 8.62 58.9 365 <25 Effluent <10.0 <0.05 <0.05 0.068 0.690 <0.5 T-Influent 220 <1 <1 3 26 <5 06/04/01 40 25 Influent 1,100 <5 <5 19.0 160 <25 Effluent <10 <0.I <0.1 <0.1 <0.1 <0.5 WC=inches of water column. TPH=total pctroicum hydrocarbons NR-Not reported [1]=Weathered Gasoline C6-C12 +Unidentified Hydrocarbos C6-C12 T-influent-Influent to catox after dilution Arco 0548 Quarterly Data.XLS Page 1 of I Delta