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If <br /> 1 <br /> Table 1 - Summary of VES Chemical Analytical Data <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton,California <br /> Wellhead Influent Sample Results Effluent Sample Results <br /> Date TPHg TPHg Benzene Benzene Toluene Ethylbenzenc Xylenes MtBE TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes <br /> (mglm') (ppmv) (mglm') (ppmv) (mg/m') (mg/m) (mg/m') (m€/m') (Mgtm') (ppmv) (m1/m') (ppmv) (Mglm�) (mg1m) (Mgtm') <br /> 12-05-98' 830 219 <1 0 <0 3 <1 0 5 53 NA <10 <3 <0 10 <0 03 <010 <0 10 <0 10 <br /> 12-21-97 System restarted <br /> 12-29-97 850 224 <5 0 <1 4 <10 64 88 NA 410 <3 <0 10 <0 03 4010 <010 <0 10 <br /> 01-26-98 1,300 343 <5 0 <1 4 <5 0 77 110 NA <10 <3 <0 10 <0 03 <010 <010 <0 10 <br /> 02-27-98 1,900 501 <2 5 <0 7 38 18 95 NA <10 <3 <0 10 <0 03 <010 <010 <0 10 <br /> 03-25-98 450 119 <1 0 <0 3 <1 0 37 50 NA 15 4 <0 10 <0 03 <010 <0 10 021 <br /> 04-20-98 850 224 <0 5 <01 <0 5 35 67 NA 44 12 <010 <0 03 <010 <010 067 <br /> 05-27-98 480 127 <0 5 <0 1 <0 5 t 5 25 NA 64 17 <0 10 <0 03 <010 <010 018 <br /> 06-30-98 170 45 <0 1 <0 03 <0 1 19 63 NA 45 12 <010 <0 03 <010 „ <010 <010 <br /> 07-30-98 720 190 <1 0 <0 3 <10 44 14 NA 48 13 <0 10 <0 03 <010 <0 10 <0 10 <br /> 08-27-98 270 71 <0 50 <0 1 <0 5 <0 5 37 NA 47 12 <0 10 <0 03 <0 10 <0 10 <0 10 <br /> 09-30-98 220 58 14 04 75 20 11 NA 110 29 25 07 10 12 58 <br /> 10-22-98 390 103 <1 0 <0 3 <10 <1 0 50 NA <10 <3 <0 10 <0 03 018 <010 020 <br /> 11-03-98 System shut down due to low influent concentrations <br /> 11-18-98 760 200 063 02 84 <0 50 092 NA 100 26 <0 10 <0 03 <010 <0 10 019 <br /> 11-20-98 200 53 <010 <0 03 026 022 26 NA 22 6 <0 10 <0 03 <010 <010 <0 10 <br /> 11-20-98 System shut down due to low influent concentrations <br /> 12-31-98 760 200 22 63 20 051 27 NA 12 3 <0 050 <0 01 <0 050 <0 050 <0 050 <br /> 01-04-99 91 24 14 04 <0 25 <0 25 082 NA 26 7 0 057 002 0 061 <0 050 015 <br /> 01-04-99 System shut down due to low influent concentrations <br /> 01-27-99 500 132 13 37 14 <0 25 14 NA 19 5 <0 050 <0 01 <0 050 <0 050 <0 050 <br /> 02-01-99 280 74 <0 50 <014 <0 50 <0 50 25 NA 47 12 <0 10 <0 03 <010 <010 025 <br /> 02-01-99 System shut down due to low influent concentrations <br /> 02-24-99 510 134 24 69 16 <0 50 24 NA 18 5 <0 050 <0 01 <0 050 <0 050 <0 050 <br /> 03-01-99 110 29 081 023 <0 05 <0 05 14 NA 53 14 0 054 002 <0 50 <0 50 022 <br /> 03-01-99 System shut down due to low influent concentrations <br /> 03-22-99 920 243 11 32 054 073 5 1 NA -__ z 2 -__z 2 2 ___? 2 <br /> 03-26-99 249 66 0 104 0 030 0 106 0 190 0 220 NA 3 3 -- 3 --- 3 3 ----3 --- 3 <br /> 03-26-99 System shut down due to low influent concentrations <br /> 04-20-99 1,600 422 29 83 22 074 38 NA 95 25 017 005 0 064 <0 050 013 <br /> 04-23-99 140 37 021 007 <0 050 <0 050 099 NA 40 11 0 068 0 020 <0 0500 <0 050 013 <br /> 04-23-99 System shut down due to low influent concentrations <br /> For Explanation refer to page 4 <br /> Stockton(56981 100124 04 <br />