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I Table i - Summary of VES Chemical Analytical Data Unocal Service Station No 6981 4707 Pacific Avenue Stockton, California Wellhead influent Sample Results Effluent Sample Results Date TPHg TPHg Benzene Benzene Toluene Eth lbenzene Xylenes MtBE TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes (mg/m3) (ppmv) (mg/m) (PPmv) (mg/m3) (mg/m3) (g/m3) (mg/m3) (mg/m3) (PPmv) (Mg/M3) (pPmv) (mg/m3) (mg/m3) (Mg/m3) � 12-05-98' 830 219 <10 <0 3 <1 0 5 53 NA <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 12-21-97 System restarted 12-29-97 $50 224 <5 0 <1 4 <5 0 6 4 88 NA <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 01-26-98 1,300 343 <50 <1 4 <5 0 7 7 110 NA <10 <3 <0 10 <0 03 <0 10 � <Q 10 <0 10 02-27-98 1,900 501 <25 <07 3 8 18 95 NA <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 03-25-98 450 119 <I0 <03 <10 37 50 NA 15 4 <010 <003 <010 <010 021 12 <0 10 <Q 03 <0 10 i�<Q 10 0 67 04-20-98 850 224 <0 5 <0 1 CO 5 3 5 67 NA 44 05-27-98 480 127 <0 5 <0 1 <05 1 5 25 NA 64 17 <0 10 <D 03 <0 10 GO 10 0 18 06-30-98 t70 45 <0 I <0 03 <01 19 6 3 NA 45 12 <0 10 <0 03 <0 10 <0 10 <0 10 07-30-98 720 190 <1 0 <0 3 <1 0 44 14 NA 48 13 <0 10 <0 03 <0 10 <0 10 <0 10 08-27-98 270 71 <0 50 <0 1 <05 <0 5 3 7 NA 47 12 <0 10 <0 03 <0 10 <0 10 <0 10 09-30-98 220 58 14 0 4 75 20 11 NA 110 29 2 5 0 7 10 12 5 8 10-22-98 390 103 <1 0 <0 3 <1 0 <10 5 0 NA <10 <3 <0 10 <0 03 0 18 <0 10 020 11-03-98 System shut down due to low influent concentrations 092 NA 100 26 <o to <0 03 GO to <010 0 19 11-18-98 760 200 063 02 84 <0 50 11-20-98 200 53 <0 10 <0 03 0 26 022 26 NA 22 6 <0 10 <0 03 <0 10 <0 10 <0 10 11-20-98 System shut dawn due to low influent concentrations 12-31-98 760 200 22 6 3 2 0 0 51 2 7 NA 12 3 <0 050 <0 41 GO 050 <0 050 <0 050 01-04-99 91 24 14 0 4 <0 25 <0 25 0 82 NA 26 7 0 057 002 0 061 <0 050 015 01-04-99 System shut down due to low influent concentrations 01-27-99 500 132 13 3 7 14 <0 25 14 NA 19 5 <0 D50 <D O1 G O 050 <0 050 0 050 02-01-99 280 74 <0 50 <0 14 <0 50 <0 50 25 NA 47 12 <0 10 <0 03 <0 10 d <0 10 0 25 02-01-99 System shut down due to low influent concentrations 02-24-99 510 134 24 69 1 6 <0 50 24 NA i8 5 <0 050 CO O1 <0 050 <0 050 <0 050 03-01-99 110 29 081 0 23 <0 05 <0 05 14 NA 53 14 0 054 002 <0 50 <0 50 0 22 03-01-99 System shut down due to low influent concentrations ---z z ---2 --- 2 -2 - z z 03-22-99 920 243 11 3 2 054 0 73 5 1 NA 3 3 3 - -3 ---3 ---3 ---3 03-26-99 24 9 6 6 0 104 0 030 0 106 0 190 0 220 NA ---- ---- ---- 03-26-99 System shut down due to tow influent concentrations 04-20-99 1,600 422 29 8 3 22 0 74 3 8 NA 95 25 0 17 0 QS 0 064 <0 050 0 13 04-23-99 140 37 0 25 007 <0 050 <0 050 099 NA 40 11 0 068 0 020 <0 0500 <0 050 0 13 04-23-99 ISystem shut down due to low influent concentrations For E tion refer to page 4 Amok 12404 Stockton, 6981